Search for the Higgs Boson In HWW and HZZ final states with CMS detector. Dmytro Kovalskyi (UCSB)

Size: px
Start display at page:

Download "Search for the Higgs Boson In HWW and HZZ final states with CMS detector. Dmytro Kovalskyi (UCSB)"

Transcription

1 Search for the Higgs Boson In HWW and HZZ final states with CMS detector Dmytro Kovalskyi (UCSB)

2 Introduction WW and ZZ finals states dominate Higgs searches at Higgs Mass WW 2L2ν has best sensitivity in GeV range ZZ 4L is one of the best channels for discovery best to study properties ZZ (2L2ν and 4L) dominate at 200GeV and above Low Mass High Mass 2

3

4 Final States 4L - cleanest signature (ZZ) 4-body mass reconstruction 2L2ν - harder, but useful thanks to good branching ratio (WW and ZZ) other channels are mostly less sensitive due to large SM backgrounds not covered in this talk 4

5 Higgs Searches in 2L2ν final state

6 Higgs 2l2ν Electron Electron Missing Energy (neutrinos) Higgs Signature: 2 isolated leptons (electron or muon) large missing energy Counting experiment, no mass peak Dilepton mass Z-peak for ee/μμ - ZZ outside of Z-peak or eμ - WW Backgrounds are different 6

7 Higgs WW 2L2ν arxiv:

8 HWW Analysis Challenges 1E+08 1E+07 1E+06 1E+05 1E+04 1E+03 1E+02 Cross-section x Branching Ratio (fb) Wjets Drell-Yan Top WW Higgs160 Key selection requirements: lepton pt>10 GeV with tight identification and isolation - QCD, Wjets large missing transverse energy (MET) and Z veto - Drell-Yan number of jet classification (Pt>30GeV) and b-quark veto - Top kinematics (mll, dφ) - WW Final step selection requirements are optimized for different Higgs mass hypotheses Underestimation of any background can lead to a signal like excess! Background estimation is the most important part of the analysis 8

9 Wjets A Loose QCD C Loose Data B Tight QCD D Tight Data Jets - main source of fakes Requirements: pt, isolation, impact parameter, quality Tight Loose: time more fake leptons Use QCD sample to measure fake rate: ε = NB/NA Background estimation: N D εn C = N C N B N A Systematic uncertainty of the method: ~35% 9

10 Missing Energy with PileUp 2011 data differs from 2010: ~8 interactions per bunch crossing larger tails in the missing energy distribution Two different MET variables: nominal - calorimeter and tracker only tracker based MET not affected by pile up pfmet and trkmet are weakly correlated for backgrounds use the smaller one for each event minmet>40 (same flavor) minmet>20 (opposite flavor) 10

11 Drell-Yan Estimation Drell-Yan: ee/μμ, but not eμ Use eμ events to subtract backgrounds Narrow Z-peak - little background Rout/in is measure both in simulation and in data Systematic uncertainties can be as large as 100% 11

12 Top Background Jet veto kills top Remaining top can be tagged: soft b-jets soft muons Top tagging eff is ~50% for 0-jet Estimate residual top: N top = N tag ε 1 ε Measure ε in 1-bjet events There mast be another b-quark Systematics ~ 20-30% 12

13 WW Background WW is an irreducible background - one order of magnitude larger SM Higgs Kinematics is the main discriminator: low mass - dphi, Mll for mh 130 need to lower lepton pt larger Wjets background above 200GeV - WW and Higgs harder to distinguish Use signal free events to calibrate WW yield 13

14 Other Backgrounds Other backgrounds are much smaller WZ/ZZ - no extra leptons. Simulation should get it right Conversions (Wjets, Wγ): no missing hits in pixel detector conversion pair veto same-sign closure Wγ* - was a major concern measure it in data Madgraph simulates it pretty well 14

15 Cut Based Analysis Discriminating variables: di-lepton mass angle between two leptons lepton pt transverse mass (dilepton + MET) For 2-jets: η >3.5, mjj>450gev Background estimation: from data at Higgs selection level: Wjets, Drell-Yan, WW from data at WW selection level: Top from Monte Carlo: WZ, ZZ, Wγ, Drell-Yan ττ 15

16 Multivariate Analysis 0-jet same flavor 1-jet same flavor 0-jet opposite flavor 1-jet opposite flavor MVA - Boosted Decision Tree Same inputs as cut based plus a few more Use binned MVA output to look for signal - more optimal use of information The expected exclusion range with 4.6/fb of data: Cut based: [129, 236] GeV MVA based: [127, 270] GeV 16

17 Extracting a Limit Example of Bayesian procedure for a simple counting experiment. expect 10 background events a model predicts 10 signal events observed - 12 f(s B,N) = e (S+B) (S + B) N N! f(s B=10,N=12) 95% Upper Limit at 95% C.L. ~ 9.97 μ = UL/SignalExpected ~ 1 - excluded S % of pseudo experiments pseudo-experiments (Poisson with mean 10) Median μ is 0.8 In 68% of the cases μ in [0.6, 1.1] In 95% of the cases μ in [0.4, 1.6] brt μ 17

18 Results Shape analysis was cross checked: Matrix Element method Dilepton Mass instead of BDT Results are consistent with comparable sensitivity gain at low Higgs mass Limits: Expected exclusion region: [127,270] GeV Observed exclusion region: [129,270] GeV Small excess below 140GeV at ~1σ level 18

19 Future Perspectives In low mass region HWW becomes systematic limited WW still dominates as a main background in the most sensitive channels High Pile-up in 2012 will have an impact on the analysis worse MET and worse lepton identification It is very hard to have more than 3σ Standard Model Higgs discovery sensitivity due to systematics Relative sensitivity of WW in 2012 can get worse compared with other channels 19

20 Higgs ZZ 2L2ν arxiv:

21 HZZ2l2ν Analysis Challenges Key selection requirements: Z ee/μμ events with lepton pt>20 GeV Mass in [76,106] GeV (Top, WW, Wjets) large MET and Ptll>45 GeV (Drell-Yan) extra lepton veto (WZ) b-jet and soft-muon veto (Top) MT is the main discriminating variable for Higgs against remaining backgrounds works well only at higher Higgs mass Cut based and shape-based analyses performed optimized for different Higgs mass points 21

22 Z+jets Background 22

23 Other Backgrounds Top/WW backgrounds use eμ events to estimate yield in ee and μμ correct for relative efficiency difference ZZ and WZ are estimated from simulated data 23

24 Higgs 2l2nu Results CMS Upper Limits: Expected: GeV Observed: GeV March 20, 2012 Higgs Results - Moriond Dmytro Kovalskyi 24

25 Higgs ZZ 4L arxiv:

26 Higgs to ZZ 4l Signature: 4 isolated leptons (electrons and muons) Look for a peak in m4l Main challenge - lack of data Backgrounds need to be properly estimated Lepton pt: 20/10/5/5 GeV (pt>7 for electrons) Z1: 50<m<120; Z2: 12<m<120 M(4L)>100 GeV Events are classified in 3 final states eeee, eeμμ, μμμμ 26

27 HZZ4L Backgrounds Dominant background: ZZ* Low mass: Z+jets and Z+heavy flavor become significant Too few events can t use mass sideband for background normalization ZZ* is normalized to MC Z+jets is estimated using data driven techniques similar to HWW analysis 27

28 Results 120 GeV Local: 2.5σ Global: 1.0σ 28

29 Future Perspectives HZZ4L is statistics limited analysis High Pile-up in 2012 will have little effect Not all the available information was used Expect new more sensitive analysis this year While in 2011 relative contribution of HZZ4L at 125GeV was worse than Hgg and HWW, in 2012 it may improve HZZ4L is a discovery channel 29

30 Fits and Final Combination

31 Best Fit Values GeV 125 GeV H ZZ H WW 31

32 All Channels Combined Expected Exclusion range: [114.5, 550] GeV Observed: [127.5, 600] GeV Largest deviation from background: 125GeV - 2.1σ global significance for GeV window 32

33 Summary LHC did an amazing job in 2011: 5/fb of data per experiment (100 times more than in 2010) CMS excludes Standard Model Higgs at 95% C.L. in [127,600] GeV range Higgs to WW/ZZ channels are main contributors An excess is observed at ~125 GeV 2.1σ global significance 2012 year should give us the final answer 33

34 Backup Slides

35 Z 4L Control Sample Single resonance production mz2: 12GeV 4GeV Decent agreement between data and MC 35

36 HZZ4L efficiency 36

37 Mass Resolution 4μ 4e For low Higgs mass detector resolution dominates CMS for MH=150 GeV σ4e=2.7 GeV; σ4μ=1.6 GeV; σ2e2μ=2.1 GeV ATLAS and CMS have comparable mass resolution (CMS has a bit better σ4μ) 37

38 Fermiophobic Limits 38

Higgs search in WW * and ZZ *

Higgs search in WW * and ZZ * Higgs search in WW * and ZZ * Emanuele Di Marco on behalf of CMS collaboration La Sapienza Università di Roma & INFN Roma1 July, 29 2011 1 Higgs production at LHC gluon fusion (gg H) gg H is the dominant

More information

Search for the Standard Model Higgs Boson in H WW lν lν with the ATLAS experiment

Search for the Standard Model Higgs Boson in H WW lν lν with the ATLAS experiment Search for the Standard Model Higgs Boson in H WW lν lν with the ATLAS experiment MCTP Symposium 2012, University of Michigan, Ann Arbor, US Outline SM Higgs Boson production and decay Analysis based on

More information

Search for the Standard Model Higgs in WW (lν)(lν)

Search for the Standard Model Higgs in WW (lν)(lν) Search for the Standard Model Higgs in WW (lν)(lν) v l v l Yanyan Gao (Fermilab) February 11, 13 HEP Lunch seminar at University of Chicago The SM Higgs Production and Decays at LHC "(pp! H+X) [pb] The

More information

PoS(DIS 2010)190. Diboson production at CMS

PoS(DIS 2010)190. Diboson production at CMS (on behalf of the CMS collaboration) INFN-Napoli & University of Basilicata E-mail: fabozzi@na.infn.it We present an analysis strategy based on Monte Carlo simulations for measuring the WW and WZ production

More information

Search for a heavy scalar boson decaying into a pair of Z bosons in the 2l2ν final state in CMS

Search for a heavy scalar boson decaying into a pair of Z bosons in the 2l2ν final state in CMS Search for a heavy scalar boson decaying into a pair of Z bosons in the 2l2ν final state in CMS Li Yuan Beihang University CLHCP 2016 December 18, 2016 1 Outline Introduction Overview Analysis Strategy

More information

Measurements of Fermionic Couplings of the Standard Model Higgs Boson using the bb, ττ and µµ Decay Channels with the ATLAS Detector

Measurements of Fermionic Couplings of the Standard Model Higgs Boson using the bb, ττ and µµ Decay Channels with the ATLAS Detector Measurements of Fermionic Couplings of the Standard Model Higgs Boson using the bb, ττ and µµ Decay Channels with the ATLAS Detector International Europhysics Conference on High Energy Physics Venice,

More information

ATLAS-CONF October 15, 2010

ATLAS-CONF October 15, 2010 ATLAS-CONF-2010-096 October 15, 2010 Data-driven background estimation for the H τ + τ τ h search at 7 TeV with the ATLAS detector Ian Howley 7 December 2010 1 Motivation One of the primary LHC physics

More information

Searching for the Higgs at the Tevatron

Searching for the Higgs at the Tevatron Searching for the Higgs at the Tevatron 5 th May 2009 Particle Physics Seminar, Oxford Outline Introduction The challenges and analysis strategies Low mass SM Higgs searches High mass SM Higgs searches

More information

Higgs Boson at the CMS experiment

Higgs Boson at the CMS experiment 16 th Lomonosov Conference on Elementary Particle Physics 22 28 August 2013, Moscow (Russia) Higgs Boson at the CMS experiment Somnath Choudhury (for the CMS collaboration) 5.1 fb -1 @ 7 TeV + 5.3 fb -1

More information

Update on H ZZ 2l2ν Analysis

Update on H ZZ 2l2ν Analysis Update on H ZZ 2l2ν Analysis Arun Kumar University of Delhi India-CMS Meeting 22 nd -23 rd Dec. 2011 University of Delhi, Delhi Outline Introduction and Analysis Strategy Changes in the analysis since

More information

The Tevatron s Search for High Mass Higgs Bosons

The Tevatron s Search for High Mass Higgs Bosons The Tevatron s Search for High Mass Higgs Bosons Konstantinos A. Petridis University of Manchester On behalf of the CDF and DØ Collaborations K.A. Petridis (University of Manchester) Tevatron High Mass

More information

Higgs Boson Searches at ATLAS

Higgs Boson Searches at ATLAS Higgs Boson Searches at ATLAS Jianming Qian University of Michigan October 5, 2011 Maryland/John Hopkins Joint Seminar, October 5, 2011 Jianming Qian (University of Michigan) 1 Standard Model Standard

More information

Searches for electroweak production of supersymmetric gauginos and sleptons with the ATLAS detector

Searches for electroweak production of supersymmetric gauginos and sleptons with the ATLAS detector Searches for electroweak production of supersymmetric gauginos and sleptons with the ATLAS detector Christopher Bock on behalf of the ATLAS Collaboration SUSY5 - August 7, 5 Introduction Outline Introduction

More information

Search for Higgs to tt at CMS

Search for Higgs to tt at CMS Search for Higgs to tt at CMS Arun Nayak IRFU/SPP, CEA, Saclay 11/10/2013 Aperos du SPP 1 Why Higgs to tt? Introduction Most sensitive channel to probe lepton couplings o Important to establish SM predictions

More information

First studies towards top-quark pair. dilepton channel at s = 13 TeV with the CMS detector

First studies towards top-quark pair. dilepton channel at s = 13 TeV with the CMS detector First studies towards topquark pair differential cross section measurement in the dilepton channel at s = 13 TeV with the CMS detector Mykola Savitskyi, Maria Aldaya, Carmen Diez Pardos et al. DESYCMS

More information

Standard Model physics with taus in ATLAS

Standard Model physics with taus in ATLAS Standard Model physics with taus in ATLAS IFJ PAN, Cracow, Poland Why we are interested in taus? Tau leptons play an important role in the physics program of the ATLAS experiment as they are tools in many

More information

Search for the SM Higgs boson in the decay channel H ZZ ( * ) 4l in ATLAS

Search for the SM Higgs boson in the decay channel H ZZ ( * ) 4l in ATLAS Search for the SM Higgs boson in the decay channel H ZZ ( * ) 4l in ATLAS Luis R Flores Castillo University of Wisconsin-Madison On behalf of the ATLAS Collaboration Higgs Hunting 2012 July 19, 2012 Orsay

More information

Seminario di fine III anno

Seminario di fine III anno Seminario di fine III anno Dottorato in Fisica ed Astrofisica Ciclo XXIV Federico De Guio Università degli Studi di Milano Bicocca ed INFN Outline: Vertex selection in Hgg events W search with 1/fb Vertex

More information

Search for a SM-like Higgs boson. Zijun Xu Peking University ISHP, Beijing Aug 15, 2013

Search for a SM-like Higgs boson. Zijun Xu Peking University ISHP, Beijing Aug 15, 2013 l n W H W Search for a SM-like Higgs boson decaying into WW lνq q in CMS Zijun Xu Peking University ISHP, Beijing Aug 15, 2013 Outline Introduction H WW Lep + MET + 2 jets [1] : 160-600 GeV H WW Lep +

More information

Evidence for tth production at ATLAS

Evidence for tth production at ATLAS Evidence for tth production at ATLAS Rohin T Narayan on behalf of the ATLAS collaboration Nov-6-2017, Higgs couplings Heidelberg Motivation Fermion masses are generated through Yukawa interaction Heaviest

More information

Higgs-related SM Measurements at ATLAS

Higgs-related SM Measurements at ATLAS Higgs-related SM Measurements at ATLAS Junjie Zhu University of Michigan 2 nd MCTP Spring Symposium on Higgs Boson Physics Outline Introduction Isolated γγ cross section (37 pb -1, Phys. Rev. D 85, 012003

More information

ATLAS Searches for Higgs Bosons Beyond the Standard Model

ATLAS Searches for Higgs Bosons Beyond the Standard Model ATLAS Searches for Higgs Bosons Beyond the Standard Model Trevor Vickey University of the Witwatersrand, South Africa University of Oxford, United Kingdom on behalf of the ATLAS Collaboration July 28,

More information

La ricerca dell Higgs Standard Model a CDF

La ricerca dell Higgs Standard Model a CDF La ricerca dell Higgs Standard Model a CDF Melisa Rossi INFN-TS Giornata di seminari INFN Trieste - 7 Luglio 2009 FNAL: Fermi National Accelerator Lab Tevatron currently provides the highest energy proton-antiproton

More information

CMS Searches for New Physics

CMS Searches for New Physics CMS Searches for New Physics Christian Autermann, for the CMS collaboration I. Phys. Inst. RWTH Aachen University, Germany QCD14 2 Overview Searches for New Physics at CMS Inclusive search for Supersymmetry

More information

Inclusive top pair production at Tevatron and LHC in electron/muon final states

Inclusive top pair production at Tevatron and LHC in electron/muon final states Inclusive top pair production at Tevatron and LHC in electron/muon final states Andreas Jung for the ATLAS, CDF, CMS and D Collaboration Fermilab, DAB5 - MS 357, P.O. Box 5, Batavia, IL, 651, USA DOI:

More information

Double Parton Scattering in CMS. Deniz SUNAR CERCI Adiyaman University On behalf of the CMS Collaboration Low-x th June 2017 Bari, Italy

Double Parton Scattering in CMS. Deniz SUNAR CERCI Adiyaman University On behalf of the CMS Collaboration Low-x th June 2017 Bari, Italy Double Parton Scattering in CMS Deniz SUNAR CERCI Adiyaman University On behalf of the CMS Collaboration Low-x 2017 17th June 2017 Bari, Italy Outline Introduction to DPS DPS measurements with CMS 2b +

More information

How to find a Higgs boson. Jonathan Hays QMUL 12 th October 2012

How to find a Higgs boson. Jonathan Hays QMUL 12 th October 2012 How to find a Higgs boson Jonathan Hays QMUL 12 th October 2012 Outline Introducing the scalar boson Experimental overview Where and how to search Higgs properties Prospects and summary 12/10/2012 2 The

More information

New physics searches with dileptons and diphotons at ATLAS

New physics searches with dileptons and diphotons at ATLAS New physics searches with dileptons and diphotons at ATLAS Martina Hurwitz Lawrence Berkeley National Laboratory On behalf of the ATLAS collaboration SEARCH conference University of Maryland March, 2012

More information

BSM Higgs in ATLAS and CMS

BSM Higgs in ATLAS and CMS BSM Higgs in ATLAS and CMS A.-M. Magnan Imperial College London 11/01/2012, BSM 4 LHC UK Workshop A.-M. Magnan BSM Higgs in ATLAS and CMS Durham, 11/01/2012 1 / 32 Introduction Extensions to Standard Model:

More information

Search for Invisible Decay of Higgs boson at LHC

Search for Invisible Decay of Higgs boson at LHC Search for Invisible Decay of Higgs boson at LHC Kajari Mazumdar Tata Institute of Fundamental Research Mumbai DHEP seminar, TIFR, Mumbai 22.4.2014 Plan of the talk Preliminaries Status of measurements

More information

Physics with Tau Lepton Final States in ATLAS. Felix Friedrich on behalf of the ATLAS Collaboration

Physics with Tau Lepton Final States in ATLAS. Felix Friedrich on behalf of the ATLAS Collaboration Physics with Tau Lepton Final States in ATLAS on behalf of the ATLAS Collaboration HEP 2012, Valparaiso (Chile), 06.01.2012 The Tau Lepton m τ = 1.8 GeV, heaviest lepton cτ = 87 μm, short lifetime hadronic

More information

Search for a new spin-zero resonance in diboson channels at 13 TeV with the CMS experiment

Search for a new spin-zero resonance in diboson channels at 13 TeV with the CMS experiment Search for a new spin-zero resonance in diboson channels at 3 TeV with the experiment Universite Catholique de Louvain (UCL) (BE) E-mail: alessio.magitteri@cern.ch On behalf of the Collaboration Searches

More information

Discovery potential of the SM Higgs with ATLAS

Discovery potential of the SM Higgs with ATLAS Discovery potential of the SM Higgs with P. Fleischmann On behalf of the Collaboration st October Abstract The discovery potential of the Standard Model Higgs boson with the experiment at the Large Hadron

More information

SEARCH FOR 4 TH GENERATION QUARKS AT CMS

SEARCH FOR 4 TH GENERATION QUARKS AT CMS SEARCH FOR 4 TH GENERATION QUARKS AT CMS Kai-Feng Chen National Taiwan University LHC symposium in PSROC annual meeting January 6 th 0, National Normal University, Taipei 4TH GENERATIONS: WHY? WHY NOT?

More information

Search for the High-Mass Standard Model Higgs Boson with the ATLAS Detector

Search for the High-Mass Standard Model Higgs Boson with the ATLAS Detector Search for the High-Mass Standard Model Higgs Boson with the ATLAS Detector Sylvie Brunet Indiana University on behalf of the ATLAS collaboration Sylvie Brunet, Tau Fake Rate Plans, 02/10/2008 SEARCH 2012

More information

Status of ATLAS Higgs Search

Status of ATLAS Higgs Search Canada s National Laboratory for Particle and Nuclear Physics Laboratoire national canadien pour la recherche en physique nucléaire et en physique des particules Status of ATLAS Higgs Search Reda Tafirout

More information

Searches for SM H ττ at the LHC

Searches for SM H ττ at the LHC Searches for SM H ττ at the LHC M.Bachtis University of Wisconsin-Madison On behalf of the ATLAS and CMS Collaborations arxiv:1202.4083, ATLAS-CONF-2012-014 CMS PAS HIG-12-006, HIG-12-007 Introduction

More information

Prospect for WW Study with Early ATLAS Data

Prospect for WW Study with Early ATLAS Data Prospect for WW Study with Early ATLAS Data N. Vranješ, Lj. Simić, D.S.Popović ATLAS@Institute of Physics Motivation and WW production at LHC Event reconstruction and selection WW production measurement

More information

PoS(CORFU2016)060. First Results on Higgs to WW at s=13 TeV with CMS detector

PoS(CORFU2016)060. First Results on Higgs to WW at s=13 TeV with CMS detector First Results on Higgs to WW at s=13 ev with CMS detector Università di Siena and INFN Firenze E-mail: russo@fi.infn.it he first measurement of the Higgs boson cross section at 13 ev in H WW 2l2ν decay

More information

Search for a heavy gauge boson W e

Search for a heavy gauge boson W e Search for a heavy gauge boson W e Cornell University LEPP Journal Club Seminar April 1, 2011 The LHC Machine 2 The beginning of the LHC era First collisions at 7 TeV confirmed on March 30, 2010 There

More information

Dark Matter in ATLAS

Dark Matter in ATLAS Dark Matter in ATLAS Silvia Resconi INFN Milano (on behalf of the ATLAS Collaboration) Ordinary Matter Dark Matter Dark Energy Rencontre de Moriond: QCD and High Energy Interactions 21st March 2016 Outline

More information

Recent ATLAS measurements in Higgs to diboson channels

Recent ATLAS measurements in Higgs to diboson channels Recent ATLAS measurements in Higgs to diboson channels Yusheng Wu University of Michigan Institute of Physics, Academia Sinica On behalf of the ATLAS collaboration August 31 st - Higgs Hunting 2016 Introduction

More information

Un-ki Yang. Seoul National University. WIN 2015, June 8-13, 2015, MPIK Heidelberg, On behalf of the ATLAS and CMS collaborations

Un-ki Yang. Seoul National University. WIN 2015, June 8-13, 2015, MPIK Heidelberg, On behalf of the ATLAS and CMS collaborations Un-ki Yang Seoul National University On behalf of the ATLAS and CMS collaborations! WIN 2015, June 8-13, 2015, MPIK Heidelberg,! ! Small neutrino mass " heavy neutrino (N R ) by SeaSaw! Type I : weak-singlet

More information

Higgs Searches at CMS

Higgs Searches at CMS Higgs Searches at CMS Ashok Kumar Department of Physics and Astrophysics University of Delhi 110007 Delhi, India 1 Introduction A search for the Higgs boson in the Standard Model (SM) and the Beyond Standard

More information

First Look at H WW * lepton + h Analysis. University of Delhi. Ajay Kumar, Arun Kumar, Dr. Kirti Ranjan

First Look at H WW * lepton + h Analysis. University of Delhi. Ajay Kumar, Arun Kumar, Dr. Kirti Ranjan First Look at H WW * lepton + h Analysis Ajay Kumar, Arun Kumar, Dr. Kirti Ranjan University of Delhi India CMS Meeting, 22-23 December 2011 @ University of Delhi, New Delhi 1 Overview Motivation Introduction

More information

Search for SUSY at CMS in lepton or photon final states. PANIC 2011 K. Theofilatos (on behalf of CMS)

Search for SUSY at CMS in lepton or photon final states. PANIC 2011 K. Theofilatos (on behalf of CMS) Search for SUSY at CMS in lepton or photon final states CMS in one slide Optimal design for reconstructing leptons & photons Compact & precisely aligned detector with B=3.8 T Calorimeters operating inside

More information

Searches at the LHC: Results from first data

Searches at the LHC: Results from first data Searches at the LHC: Results from first data 23 March, 2011 Satyaki Bhattacharya SINP, Kolkata Plan of talk CMS Higgs, SUSY, Exotica results from Moriond Higgs SUSY Exotica main emphasis In exotica part

More information

Status and Prospects of Higgs CP Properties with CMS and ATLAS

Status and Prospects of Higgs CP Properties with CMS and ATLAS Status and Prospects of Higgs CP Properties with CMS and ATLAS Andrew Whitbeck Fermilab!! The CP Nature of the Higgs Boson Workshop @ U. Mass. Amherst! May 1, 2015 What we know about the Higgs 125 GeV

More information

Study of Higgs boson production in the WW decay channel at the LHC

Study of Higgs boson production in the WW decay channel at the LHC Study of iggs boson production in the decay channel at the LC Tatjana Lenz on behalf of the and CMS collaborations.8.3 Rencontres du Vietnam Introduction n th July - the discovery of a new particle n and

More information

Lepton Flavour Violation at ATLAS & CMS

Lepton Flavour Violation at ATLAS & CMS Lepton Flavour Violation at ATLAS & CMS Shikma Bressler on behalf of the ATLAS & CMS collaborations H τμ/τe/μe Z τμ/τe/μe Heavy X τμ/τe/μe Others 1 LHC results Library Higgs decays Experiment Process s

More information

Measurement of the Z ττ cross-section in the semileptonic channel in pp collisions at s = 7 TeV with the ATLAS detector

Measurement of the Z ττ cross-section in the semileptonic channel in pp collisions at s = 7 TeV with the ATLAS detector Measurement of the Z ττ cross-section in the semileptonic channel in pp collisions at s = 7 TeV with the ATLAS detector Sofia Consonni Università di Milano & INFN XCVII Congresso Nazionale della Società

More information

Recent Results on New Phenomena and Higgs Searches at DZERO

Recent Results on New Phenomena and Higgs Searches at DZERO Recent Results on New Phenomena and Higgs Searches at DZERO Neeti Parashar Louisiana Tech University Ruston, Louisiana U.S.A. 1 Outline Motivation for DØ Run II Detector at Fermilab The Fermilab Tevatron

More information

Searches for New Phenomena in Events with Multiple Leptons with the ATLAS Detector

Searches for New Phenomena in Events with Multiple Leptons with the ATLAS Detector Searches for New Phenomena in Events with Multiple Leptons with the ALAS Detector ÜLİN VAROL University of Massachusetts, Amherst On Behalf of the ALAS Collaboration OULINE Introduction Excited e/μ Search

More information

Identification of the Higgs boson produced in association with top quark pairs in proton-proton

Identification of the Higgs boson produced in association with top quark pairs in proton-proton Identification of the Higgs boson produced in association with top quark pairs in proton-proton collision: an analysis of the final state containing three leptons with the ATLAS detector Valentina Vecchio,

More information

PoS(EPS-HEP2011)250. Search for Higgs to WW (lνlν, lνqq) with the ATLAS Detector. Jonas Strandberg

PoS(EPS-HEP2011)250. Search for Higgs to WW (lνlν, lνqq) with the ATLAS Detector. Jonas Strandberg with the ATLAS Detector Royal Institute of Technology, KTH, Stockholm, Sweden E-mail: jostran@kth.se Higgs boson searches in the H WW ( ) lνlν (l = e, µ) and the H WW ( ) lνqq decay modes, using. fb of

More information

ATLAS Discovery Potential of the Standard Model Higgs Boson

ATLAS Discovery Potential of the Standard Model Higgs Boson ATLAS Discovery Potential of the Standard Model Higgs Boson Christian Weiser University of Freiburg (on behalf of the ATLAS Collaboration) 14th Lomonosov Conference on Elementary Particle Physics Moscow,

More information

Higgs Boson Physics at the Tevatron

Higgs Boson Physics at the Tevatron Higgs Boson Physics at the Tevatron Koji Sato On Behalf of CDF and D0 Collaborations Windows on the Universe Qui Nhon, August 14, 2013 1 Tevatron Run II p p collisions at s = 1.96 TeV (1.8 TeV in Run I).

More information

Search for Higgs in H WW lνlν

Search for Higgs in H WW lνlν Search for Higgs in H WW lνlν John Alison University of Pennsylvania on behalf of the ATLAS Collaboration Higgs Physics Standard Model Remarkably Accurate Description Data. One Remaining Piece: Higgs Boson.

More information

The Compact Muon Solenoid Experiment. Conference Report. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland

The Compact Muon Solenoid Experiment. Conference Report. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland Available on CMS information server CMS CR -2017/094 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH211 GENEVA 23, Switzerland 18 March 2017 (v3, 20 March 2017) Recent

More information

Higgs decaying into bosons

Higgs decaying into bosons Higgs decaying into bosons PASCOS 213 - Nov. 2, 213 G.Cerati (UCSD) on behalf of the CMS collaboration Bosonic Higgs Decays σ (nb) 9 8 7 6 5 4 3 2 1-2 -3-4 -5-6 W.J. Stirling, private communication proton

More information

Search for the Higgs Boson at the LHC. Karl Jakobs Physikalisches Institut Universität Freiburg

Search for the Higgs Boson at the LHC. Karl Jakobs Physikalisches Institut Universität Freiburg Search for the Higgs Boson at the LHC Karl Jakobs Physikalisches Institut Universität Freiburg Outline of the talk:. Introduction, the Higgs boson in the Standard Model. The Standard Model Higgs boson

More information

Evidence for Higgs Boson Decays to a Pair of τ-leptons

Evidence for Higgs Boson Decays to a Pair of τ-leptons Evidence for Higgs Boson Decays to a Pair of τ-leptons ET miss = 119 GeV μ (pt=6 GeV) τhad (pt=96 GeV) mττ =19 GeV Nils Ruthmann mjj =65 GeV Nils Ruthmann (Universität Freiburg) On Behalf of the ATLAS

More information

Search for the SM Higgs in τ l τ h jj Final States: Production Modes and Background Modeling

Search for the SM Higgs in τ l τ h jj Final States: Production Modes and Background Modeling Search for the SM Higgs in τ l τ h jj Final States: Production Modes and Background Modeling Ian Howley on behalf of the DØ Collaboration APS April Meeting, Atlanta GA March 30, 2012 I. Howley (UT Arlington)

More information

D0 Higgs Results and Tevatron Higgs Combination

D0 Higgs Results and Tevatron Higgs Combination D Higgs Results and Tevatron Higgs Combination Graham W. Wilson University of Kansas July 3rd On behalf of the CDF and D collaborations Graham W. Wilson (University of Kansas) BEACH, Wichita July 3rd /

More information

2016 SM H ττ Analysis 26th September 2016

2016 SM H ττ Analysis 26th September 2016 2016 SM H ττ Analysis 26th September 2016 INSTITUT FÜR EXPERIMENTELLE KERNPHYSIK (EKP) FAKULTÄT FÜR PHYSIK KIT Universität des Landes Baden Württemberg und nationales Forschungszentrum in der Helmholtz

More information

Latest results on the SM Higgs boson in the WW decay channel using the ATLAS detector

Latest results on the SM Higgs boson in the WW decay channel using the ATLAS detector Latest results on the SM iggs boson in the decay channel using the detector arxiv:188.954, accepted by PRB Claudia Bertella, on behalf of Collaboration The 4th China LC Physics Workshop (CLCP 218) 21-December-218

More information

Constraints on Higgs-boson width using H*(125) VV events

Constraints on Higgs-boson width using H*(125) VV events Constraints on Higgs-boson width using H*(125) VV events Roberto Covarelli ( University / INFN of Torino ) on behalf of the CMS and ATLAS collaborations 25th International Workshop on Weak Interactions

More information

Search for High Mass SM Higgs at the Tevatron

Search for High Mass SM Higgs at the Tevatron Search for High Mass SM Higgs at the Tevatron Les Rencontres de Physique de la Vallee D'Aoste Mar. 6, 2009 Herbert Greenlee Fermilab for the CDF and D0 Collaborations SM Higgs Boson Direct Limit (LEP)

More information

Searching for the Higgs at the LHC

Searching for the Higgs at the LHC Searching for the Higgs at the LHC Philip Lawson Boston University - PY 898 - Special Topics in LHC Physics 3/16/2009 1 Outline Theory & Background of Higgs Mechanism Production Modes Decay Modes - Discovery

More information

Measurement of EW production! of Z+2j at the LHC

Measurement of EW production! of Z+2j at the LHC Measurement of EW production! of Z+j at the LHC Frontiers of Fundamental Physics, Marseille Kiran Joshi On behalf the ATLAS and CMS collaborations /7/ Overview Introduction and motivation ATLAS measurement

More information

Tevatron Non-SUSY BSM: Searches for Physics Beyond the SM and MSSM. David Stuart University of California, Santa Barbara. DIS 2007, Munich April 2007

Tevatron Non-SUSY BSM: Searches for Physics Beyond the SM and MSSM. David Stuart University of California, Santa Barbara. DIS 2007, Munich April 2007 Tevatron Non-SUSY BSM: Searches for Physics Beyond the SM and MSSM David Stuart University of California, Santa Barbara DIS 2007, Munich April 2007 Outline There are two categories of searches: 1. Model

More information

The search for standard model Higgs boson in ZH l + l b b channel at DØ

The search for standard model Higgs boson in ZH l + l b b channel at DØ The search for standard model Higgs boson in ZH l + l b b channel at DØ University of Science and Technology of China E-mail: pengj@fnal.gov on behalf of the DØ collaboration We present a search for the

More information

Early physics with Atlas at LHC

Early physics with Atlas at LHC Early physics with Atlas at LHC Bellisario Esposito (INFN-Frascati) On behalf of the Atlas Collaboration Outline Atlas Experiment Physics goals Next LHC run conditions Physics processes observable with

More information

PoS(EPS-HEP 2013)215. WW, WZ, and ZZ production at CMS. Jordi DUARTE CAMPDERROS (on behalf of CMS collaboration)

PoS(EPS-HEP 2013)215. WW, WZ, and ZZ production at CMS. Jordi DUARTE CAMPDERROS (on behalf of CMS collaboration) (on behalf of CMS collaboration) Universidad de Cantabria/CSIC E-mail: jorge.duarte.campderros@cern.ch We present the WW, WZ and ZZ production cross sections measurements and constraints on anomalous triple-gauge

More information

Higgs Production at LHC

Higgs Production at LHC Higgs Production at LHC Vittorio Del Duca INFN LNF WONP-NURT La Habana 5 february 2013 CERN North Jura ATLAS Sketch of LHC North Ring 26,6 Km long and 3,8 m of diameter, made of 8 arches connected by 8

More information

Recent Results on Top Physics at CMS

Recent Results on Top Physics at CMS Recent Results on Top Physics at CMS Jasmin Gruschke (KIT) on behalf of the CMS Collaboration Moriond/QCD: Rencontres de Moriond on QCD and High Energy Interactions March 2 th -29 th 211 Jasmin.Gruschke@cern.ch

More information

Top Quark Studies with CMS

Top Quark Studies with CMS Top Quark Studies with CMS Frank-Peter Schilling (KIT) on behalf of the CMS collaboration The TOP Top Physics at the LHC Precise SM measurements o Heaviest known elementary particle (large Yukawa coupling)

More information

Search for the Standard Model Higgs boson decaying into a WW pair

Search for the Standard Model Higgs boson decaying into a WW pair Search for the Standard Model Higgs boson decaying into a WW pair INFN Roma Tre E-mail: michela.biglietti@cern.ch P. Govoni Universita degli Studi Milano Bicocca E-mail: pietro.govoni@gmail.com Results

More information

CMS Higgs Results Adi Bornheim Caltech

CMS Higgs Results Adi Bornheim Caltech CMS Higgs Results Adi Bornheim Caltech 06.04.2014 1 A brief history of recent times W & Z Boson t-quark H Boson 1964 1974 1984 1994 2004 2014 Peter Higgs This talk : Summary of 29 CMS publications and

More information

ATLAS Di-fermion Results. Koji Nakamura (KEK) on behalf of ATLAS Collaboration

ATLAS Di-fermion Results. Koji Nakamura (KEK) on behalf of ATLAS Collaboration ATLAS Di-fermion Results Koji Nakamura (KEK) on behalf of ATLAS Collaboration 30th July, 2015 Higgs 2015 1 Motivation Higgs boson has been observed by Bosonic decay channels (i.e. γγ,zz,ww) Loop process

More information

Top Physics in Hadron Collisions

Top Physics in Hadron Collisions Top Physics in Hadron Collisions Dirk Dammann DESY 2010-02-04 1 / 44 Outline 1 2 3 4 2 / 44 Outline Motivation Top Production Top Decay Top Physics 1 Motivation Top Production Top Decay Top Physics 2 3

More information

Measurement of the Z production cross section with ATLAS

Measurement of the Z production cross section with ATLAS Measurement of the Z production cross section with ATLAS Frank Seifert supervised by Arno Straessner, Wolfgang Mader on behalf of the ATLAS Z ττ analysis working group 1 Outline 1. Motivation 2. Tau identification

More information

Higgs couplings and mass measurements with ATLAS. Krisztian Peters CERN On behalf of the ATLAS Collaboration

Higgs couplings and mass measurements with ATLAS. Krisztian Peters CERN On behalf of the ATLAS Collaboration Higgs couplings and mass measurements with ATLAS CERN On behalf of the ATLAS Collaboration July observation: qualitative picture A single state observed around ~125 GeV Qualitatively all observations consistent

More information

SEARCH FOR ASSOCIATED PRODUCTION OF THE HIGGS BOSON IN THE H W W CHANNEL WITH A FULLY LEPTONIC FINAL STATE

SEARCH FOR ASSOCIATED PRODUCTION OF THE HIGGS BOSON IN THE H W W CHANNEL WITH A FULLY LEPTONIC FINAL STATE Vol. 45 (2014) ACTA PHYSICA POLONICA B No 7 SEARCH FOR ASSOCIATED PRODUCTION OF THE HIGGS BOSON IN THE H W W CHANNEL WITH A FULLY LEPTONIC FINAL STATE Valerio Bortolotto on behalf of the ATLAS Collaboration

More information

Search for Low-Mass Scalar Bosons at the LHC

Search for Low-Mass Scalar Bosons at the LHC Search for Low-Mass Scalar Bosons at the LHC Linda Finco IPN Lyon (IN2P3-CNRS)/UCB Lyon 1, France Strasbourg (France) March 23 rd 2018 https://twiki.cern.ch/twiki/pub/cmspublic/physicsresultscombined/sigmanew_v0.pdf

More information

Title Text. ATLAS Higgs Boson Discovery Potential

Title Text. ATLAS Higgs Boson Discovery Potential Title Text ATLAS Higgs Boson Discovery Potential Isabelle Wingerter-Seez - LAPP - Annecy isabelle.wingerter@lapp.in2p3.fr Corfu Summer Institute September 2009 1 Title Text ATLAS Standard Model Higgs Boson

More information

Preparations for SUSY searches at the LHC

Preparations for SUSY searches at the LHC Preparations for SUSY searches at the LHC Alex Tapper UK HEP Forum: LHC First Results and Outlook, September 20-21 20. Outline Search strategy Examples with 70 nb -1 Hadronic searches Leptonic searches

More information

Higgs and Z τ + τ in CMS

Higgs and Z τ + τ in CMS Higgs and Z τ + τ in CMS Christian Veelken for the CMS Collaboration Moriond EWK Conference, March 14 th 2011 Z τ + τ - Production @ 7 TeV τ + Z τ - CMS Measurement of Z/γ* l + l -, l = e/µ: σ BR(Z/γ*

More information

A Search for Doubly Charged Higgs Production at 8 TeV Using the CMS Detector at the LHC

A Search for Doubly Charged Higgs Production at 8 TeV Using the CMS Detector at the LHC A Search for Doubly Charged Higgs Production at 8 TeV Using the CMS Detector at the LHC 1 UW-Madison Preliminary Examination Outline The Standard Model Doubly Charged Higgs Motivation Type II Seesaw Mechanism

More information

Single top: prospects at LHC

Single top: prospects at LHC Single top: prospects at LHC Markus Cristinziani (Uni Bonn) for ATLAS, Giovanni Petrucciani (SNS & INFN Pisa) for CMS Top2008 M. Cristinziani (Bonn), G. Petrucciani (Pisa) 1 Outline What changes between

More information

Discussion of QCD aspects of multi boson production measured with the ATLAS detector

Discussion of QCD aspects of multi boson production measured with the ATLAS detector Discussion of QCD aspects of multi boson production measured with the ATLAS detector Dimos Sampsonidis Aristotle University of Thessaloniki On behalf of the ATLAS Collaboration Low-x Meeting 2016, 6-11

More information

Yoshikazu NAGAI (CPPM, Aix Marseille Université)

Yoshikazu NAGAI (CPPM, Aix Marseille Université) Search for the Standard Model Higgs boson decaying into a b quark pair at ATLAS Yoshikazu NAGAI (CPPM, Aix Marseille Université) CPPM Seminar October 20, 2014 Contents Introduction Analysis overview Result

More information

QCD Multijet Background and Systematic Uncertainties in Top Physics

QCD Multijet Background and Systematic Uncertainties in Top Physics QCD Multijet Background and Systematic Uncertainties in Top Physics Jin Wang On behalf of ATLAS, CMS, CDF and D0 Collaborations IHEP, China 2013-09-15, Top2013 1 Outline Introduction of QCD Multijet Background

More information

On behalf of the ATLAS and CMS Collaborations

On behalf of the ATLAS and CMS Collaborations On behalf of the ATLAS and CMS Collaborations Reza Goldouzian Université libre de Bruxelles 1 Ø There are several models of physics beyond the standard model require new particles that couple to quarks

More information

First V+jets results with CMS. Vitaliano Ciulli (Univ. & INFN Firenze) V+jets workshop, 8-10 Sep 2010, Durham

First V+jets results with CMS. Vitaliano Ciulli (Univ. & INFN Firenze) V+jets workshop, 8-10 Sep 2010, Durham First V+jets results with CMS Vitaliano Ciulli (Univ. & INFN Firenze) V+jets workshop, 8- Sep 20, Durham Outline Jet and missing energy reconstruction W and Z selections and cross-section measurement First

More information

Higgs Searches with taus in the final state in ATLAS

Higgs Searches with taus in the final state in ATLAS Higgs Searches with taus in the final state in ATLAS (University of Washington) Terascale Workshop: Interpreting emerging Higgs data @ Uni of Oregon With many thanks to Anna Goussiou, J. Keller, M. Beckingham,

More information

W/Z + jets and W/Z + heavy flavor production at the LHC

W/Z + jets and W/Z + heavy flavor production at the LHC W/Z + jets and W/Z + heavy flavor production at the LHC A. Paramonov (ANL) on behalf of the ATLAS and CMS collaborations Moriond QCD 2012 Motivation for studies of jets produced with a W or Z boson Standard

More information

Highlights of top quark measurements in hadronic final states at ATLAS

Highlights of top quark measurements in hadronic final states at ATLAS Highlights of top quark measurements in hadronic final states at ATLAS Serena Palazzo 1,2,, on behalf of the ATLAS Collaboration 1 Università della Calabria 2 INFN Cosenza Abstract. Measurements of inclusive

More information

Stating the Case for Top at the LHC

Stating the Case for Top at the LHC Stating the Case for Top at the LHC Ken Bloom University of Nebraska-Lincoln for the ATLAS and CMS collaborations May 3, 009 Thanks to: Martine Bosman, Claudio Campagnari, Tim Christiansen, Richard Hawkings

More information

Search for top squark pair production and decay in four bodies, with two leptons in the final state, at the ATLAS Experiment with LHC Run2 data

Search for top squark pair production and decay in four bodies, with two leptons in the final state, at the ATLAS Experiment with LHC Run2 data Search for top squark pair production and decay in four bodies, with two leptons in the final state, at the ATLAS Experiment with LHC Run data Marilea Reale INFN Lecce and Università del Salento (IT) E-mail:

More information