Measurement of luminosity at 2.23GeV
|
|
- Hugh Conley
- 5 years ago
- Views:
Transcription
1 Measurement of luminosity at 2.23GeV
2 Outline Introduction Data Sets Luminosity measurement by Bhabha process Events selection Data analysis Systematic error Checked by Digamma process Events selection and Data analysis Checked by Dimu process Events selection and Data analysis Results and Summary 2
3 Introduction(1) In e + e - collider experiment, the integrated luminosity is a basic parameter, which relates to the production cross section for e + e - >X. In principle, any process can be used to determine the integrated luminosity of the data set. The integrated luminosity could be measured by: N obs L = σ ε ε trig where N obs is the observed number of the events for the final state in question, σ is the production cross section for the same final states in question, which could be determined by theoretical calculation, ε is the detection efficiency and ε trig is the trigger efficiency for collecting the e+e- events in on-line data acquisition. 3
4 Introduction(2) The QED processes of e + e γ e + e, e + e γ γγ and e + e γ μ + μ are most commonly used for determination of the luminosity because of their large production cross sections, the large detection efficiencies and the simplest final states topology. In this study,we use Bhabha process to calculate the luminosity and use Digamma process and Dimu process to check it 4
5 Data set Boss BESⅢ experiment data Data for rscan at 2.23GeV (664 reconstruction) MC sample Babayaga :1 million for bhabha process 1 million for digamma process 1 million for dimu process 0.5 million for pipi process Lundlw: 1milliom for hadronic process KKMC: 0.5 million for K + K - process 5
6 The setup of babayaga generator ApplicationMgr.DLLs += {"Babayaga"}; ApplicationMgr.TopAlg += {"Babayaga"}; Babayaga.Channel=1; // 1: e+e-->e+e-;2:e+e_->mu+mu-;3:e+e-->gamma gamma;4:e+e--->pi+pi- Babayaga.Ebeam=1.1162; // Ebeam = ECM/2 [GeV] Babayaga.MinThetaAngle=20.00; // minimum angle(deg.) Babayaga.MaxThetaAngle=160.00; //maximum angle(deg.) Babayaga.MinimumEnergy=0.01; //minimum energy (GeV) Babayaga.MaximumAcollinearity=180; //maximum acollinearity (deg.) Babayaga.RunningAlpha=1; //running alpha (0 = off, 1 = on) Babayaga.HadronicResonance=1; //hadronic resonances for ICH = 1 or 2 Babayaga.FSR_swich=1; //FSR switch for ICH = 2 (0 = off, 1 = on) Babayaga.MinEnerCutG=0.01; //minimum energy for CUTG = Y (GeV) Babayaga.MinAngCutG=5; //minimum angle for CUTG = Y (deg.) Babayaga.MaxAngCutG=21; //maximum angle for CUTG = Y (deg.) Babayaga.HBOOK = 0; // close babayaga.ntuple hbook output Babayaga.PHCUT = 0; Babayaga.CUTG = 0; 6
7 Events Selection(bhabha) MDC Track Vr < 1.0 cm Vz < 10.0 cm N + = N - = 1 Δθ < 10 Δϕ < 5 EMC Shower cosθ < 0.8 E shower > 0.65*E beam 7
8 Deposited energy in EMC Scale to the same luminosity of bhabha! Deposited energy of cluster + Deposited energy of cluster -
9 Back to back information After the energy cut,there are few background events left!to remove the bhabha events with FSR gamma which carry big energies, we need the two good candidate tracks are back-to back. 9
10 Cosθ distribution cosθ of e+ in EMC cosθ of e- in EMC 10
11 Compare data and MC(1) E(e+) after selection E(e-) after selection 11
12 Compare data and MC(2) Momentum of e+ in MDC Momentum of e- in MDC Black plots with error bars are data, red histograms are MC. All of them are in the laboratory frame. 12
13 Check the MC Momenta of e+ and e- in laboratory frame Momenta of e+ and e- in center-of-mass frame They are different! 13
14 Systematic error Uncertainty in the event selection criteria Uncertainty in the detection efficiency Uncertainty in the background estimation Uncertainty in the electron tracking Uncertainty from the generator 14
15 Uncertainty in the event selection criteria The difference of the ratios between the data and the Monte Carlo was defined by: sys = R data R MC 1,in which R = N cut N total Cut on cosθ: change cut range of cosθ Cut on Δθ : change cut range of Δθ Cut on Δφ: change cut range of Δφ Cut on deposited energy : change ratio factor (e+ and e- are separated) 15
16 Uncertainty in the detection efficiency The statistical uncertainty in the Monte Carlo efficiency is estimated by: 1 N (1 ε) ε where N is the number of Monte Carlo events for e + e (γ)e + e which are used in the determination of detection efficiency and ε is the detection efficiency. 16
17 Uncertainty in the background estimation Scale to the same luminosity of bhabha(2.638pb -1 ): s=2.23gev : Bkg N total N sur σ (nb) Scale N scale γγ 1,000, μ + μ - 1,000, π + π - 495, K + K - 500, qqbar 1,000, background level is very low! So we regard the uncertainty of background estimation as 0! 17
18 Uncertainty from the generator the uncertainty of babayaga3.5 is 0.5% 18
19 Uncertainty in the electron tracking We use two different methods : 1.use both MDC and EMC information 2.only use EMC information so, sys = R data R MC - 1, in which R = N method2 N method1 19
20 Method2(without MDC) N cluster == 2 E 1,2 > 0.65*E beam cosθ < < Δφ < 40 20
21 Δϕ Distribution ϕ1- ϕ2-180 in MC ϕ1- ϕ2-180 (data and MC) 21
22 Results of systematic error Source Δ sys (%) cosθ < Δθ < Δφ < Deposited energy of e Deposited energy of e MC statistics 0.09 Background estimation 0 Generator 0.50 Tracking efficiency 0.40 total 0.75 Any others are needed? 22
23 Events Selection(digam) MDC Track Vr < 1.0 cm Vz < 10.0 cm N + = N - = 0 EMC Shower N gamma = 2 cosθ < 0.8 E gamma > 0.65*E beam -4 < Δϕ < 2 Δθ < 10 23
24 Events Selection(add gamma conversion) MDC Track Vr < 1.0 cm Vz < 10.0 cm N + = N - = 1 EMC Shower N gamma == 1 cosθ < 0.8 E gamma > 0.65*E beam Combine MDC and EMC: E/P > 0.8 to ensure they are electron angle(e+ e-) < 15 M(e+ e-) < 0.1 GeV
25 Data Analysis(1) ϕ1- ϕ2-180 in EMC θ1+ θ2-180 in EMC Black plots with error bars are data, red histograms are babayaga MC. 25
26 Data Analysis(2) Cosθ distribution in EMC 26
27 Gamma conversion Angle(e+e-) < 15 and M(e+e-) < 0.1GeV 27
28 Events Selection(dimu) MDC Track Vr < 1.0 cm Vz < 10.0 cm N + = N - = 1 Δθ < 10 Δϕ < 5 EMC Shower cosθ < 0.8 E/P < 0.4 Isolated Nγ <= 2 If Nγ =2,M(γγ) < 0.1GeV TOF tof + -tof - < 1ns 28
29 E/P ratio E/P of cluster+ Scale to the same luminosity of bhabha! E/P of cluster- Set E/P < 0.4 to remove almost all the bhabha and digamma events and many hadronic events. 29
30 Back to back information We need the two muon candidates are back-toback, so the angle cut is the same as bhabha 30
31 Tof information We cut the tof + -tof - < 1ns to remove the cosmicray 31
32 Potential background MC As the muon counter is closed at that moment, in order to remove the potential hadronic events, we require the number of isolated photons is not larger than 2 and the M(γ1γ2) is smaller than 0.1 GeV if Nγ ==2. 32
33 M(γ1γ2) cut Data and MC As η is heavier than π 0,so the hadronic tracks with η can not be back-to-back strictly. In Data, we can not find obviously η signal. But the cut for gamma is still needed. 33
34 Momentum distribution Momentum of u+ Momentum of u- 34
35 π + π - and K + K - background Born cross section given by CLEO-C: Babar s result of σ(π + π - ) Babar s result of σ(k + K - ) σ(π + π - ) = 180pb σ(k + K - ) = 127pb 35
36 Background estimation Scale to the same luminosity of bhabha(2.638pb -1 ): s=2.23gev : Bkg N total N sur σ (nb) Scale N scale bhabha 1,000, γγ 1,000, π + π - 495, K + K - 500, qqbar 1,000, But in MC of qqbar, σ(π + π - ) = 1.27nb, σ(k + K - ) = nb (by learning the MC truth information in qqbar MC),so we can not use qqbar MC to estimate the background of dimu! 36
37 Check the MC Momenta of u+u- in MC (Lab ) Momenta of u+u- in MC (cms ) The same as bhabha! 37
38 Results 2*Ebeam Process Bhabha Digamma Dimu MC generator Babayaga Babayaga Babayaga Events Number Cross-Section(nb) ± ± ±0.02 Efficiency(%) Luminosity(pb -1 )
39 Summary By analyzing the Bhabha scattering events, Digamma scattering events and Dimu scattering events, we measure the integrated luminosities of the data taken at 2.23GeV to be 2.638pb -1, pb -1 and 2.645pb -1. But there still are some details need to be checked: 1.the momenta of e+ and e- in MC (in progress) 2.systematic error 39
Zhen Gao University of Science and Technology of China November 21th, 2013
Measurement of luminosity at 2.23GeV,2.4GeV, 2.8GeV and 3.4GeV Zhen Gao University of Science and Technology of China November 21th, 2013 1 Outline Introduction Data Sets Measurement of Luminosity at 2.23GeV
More informationLuminosity measurement for the data taken at s=4.18 GeV
Luminosity measurement for the data taken at s=4.18 GeV 1 Liu Ke 1 Liu Feng 2 Ma Hailong 1 CCNU& 2 IHEP Outline Motivation Data and MC Luminosity determination Systematic uncertainty Checks Summary 2 Motivation
More informationMeasurement of Observed Cross Sections for e + e hadrons non-d D. Charmonium Group Meeting
Measurement of Observed Cross Sections for e + e hadrons non-d D YI FANG, GANG RONG Institute of High Energy Physics, Beijing 0049, People s Republic of China March 22, 207 Charmonium Group Meeting Y.
More informationStudy of the Electromagnetic Dalitz decay of J/ψ e + e - π 0
Study of the Electromagnetic Dalitz decay of J/ψ e + e - π 0 Vindhyawasini Prasad Email: vindy@ustc.edu.cn Department of Modern Physics University of Science & Technology of China Hefei City, Anhui Province,
More informationBESIII Analysis Memo
Memo version. BESIII Analysis Memo BAM-XXX June 9, The Measurements of R value in e + e Annihilation at Center-of-Mass Energy from. to. GeV at BESIII Z. Gao a, B. X. Zhang b, C. Geng a, W. P. Wang a, Y.
More informationNicolas Berger SLAC, Menlo Park, California, U.S.A.
SLAC-PUB-11414 August 25 Frascati Physics Series Vol. VVVVVV (xxxx), pp. - DAΦNE 24: Physics at meson factories Frascati, June. 7-11, 24 Selected Contribution in Plenary Session INCLUSIVE HADRONIC RESULTS
More informationMeasurements of Cross Sections for e + e - m + m - at Energies from 3.8 to 4.6 GeV
Measurements of Cross Sections for e + e - m + m - at Energies from 3.8 to 4.6 GeV G. Rong, Y. Fu, J.Y. Zhao (Institute of High Energy Physics, CAS, Beijing, China) BESIII Charmonium Physics Meeting, 12
More informationHadronic D Decays and the D Meson Decay Constant with CLEO c
Hadronic D Decays and the D Meson Decay Constant with CLEO c representing the CLEO Collaboration presented at the 3nd International Conference on High Energy Physics, Beijing, China, Aug. 16, 004 This
More informationObservation of. San-Qiang Qu Ming-gang Zhao Hai-long Ma Nankai University Institute of High Energy Physics
Observation of CJ an-qiang Qu Ming-gang Zhao Hai-long Ma Nankai University Institute of High Energy Physics 217.3.1 Outline 1 Motivation 2 Data sample 3 Event selection 4 Branching fraction 5 ummary Motivation
More informationStudy on the Two-Photon Transition from ψ(2s) to J/ψ at BESIII
Study on the Two-Photon Transition from ψ(2s) to J/ψ at BESIII 吕晓睿 Xiao-Rui Lu (E-mail: xiaorui@gucas.ac.cn) Graduate University of Chinese Academy of Sciences (GUCAS) List of Contents: Introduction (on
More informationMulti Lepton events at HERA
St. Petersburg, 25/04/2003 DIS03 Conference Multi Lepton events at HERA Andrea Parenti (on behalf of H and ZEUS Collabs.) Padova University and INFN A.Parenti - Multi Lepton Events at HERA p./?? Outline
More informationCLEO c. Anders Ryd Cornell University June 7, e e cc D D. D K,D K e
CLEOc Cornell University June 7, 25 e e cc D D D K,D K e K K e 1 Outline CLEOc experiment and the physics program Some early results D> Absolute hadronic branching fractions Semileptonic decays 2 Testing
More informationPHI PSI 08. Federico Nguyen. International Workshop on e+e- collisions from Phi to Psi
PHI PSI 08 Laboratori Nazionali di Frascati (Roma), April 8 th 008 International Workshop on e+e- collisions from Phi to Psi A precise new KLOE measurement of F! with ISR and extraction of a µ!! for [0.35,0.95]
More informationStudy of Baryon Form factor and Collins effect at BESIII
Study of Baryon Form factor and Collins effect at BESIII Wenbiao Yan On behalf of BESIII Collaboration INT Program INT-17-3 Hadron imaging at Jefferson Lab and at a future EIC 1 Bird s View of BEPCII &
More informationMeasuring Hadronic Cross Sections
Achim G. Denig Universität Karlsruhe RADCOR 2002 Kloster Banz, Sept. 8-13 2002 Measuring Hadronic Cross Sections via Radiative Return Radiative Return KLOE Measurement (π + π ) BABAR, Summary RADIATIVE
More informationPRECISION MEASUREMENTS
PRECISION MEASUREMENTS AT Z RESONANCE Z Lineshape and number of neutrinos Lecture 2 1 October 212 Shahram Rahatlou Fisica Nucleare e Subnucleare III, Anno Accademico 212-213 http://www.roma1.infn.it/people/rahatlou/fns3/
More informationObservation of. San-Qiang Qu Ming-gang Zhao Hai-long Ma Nankai University Institute of High Energy Physics
Observation of CJ an-qiang Qu Ming-gang Zhao Hai-long Ma Nankai University Institute of High Energy Physics 17.4.5 Outline 1 Motivation Data sample 3 Event selection 4 Branching fraction 5 ummary Motivation
More informationMeasurements of. Jiangchuan Chen. (for BES Collaboration) Institute of High Energy Physics, Beijing , P.R. China
Measurements of BF ψ 377, & BF ψ 377 non and search for ψ377 exclusive non decays Jiangchuan Chen for BES Collaboration Institute of High Energy Physics, Beijing 149, P.R. China XLI Rencontres de Moriond
More informationCurrent Status of Luminosity Measurement with the CMD-3 Detector at the VEPP-2000 e + e collider
Proceedings of the CERN-BINP Workshop for Young Scientists in e + e Colliders, Geneva, Switzerland, 5 August 16, edited by V. Brancolini ans L. Linssen, CERN Proceedings, Vol. 1/17, CERN-Proceedings-17-1
More informationJ/ψ production related analysis at Belle
J/ψ production related analysis at Belle X. H. He, J. Wang, Y. Ban Peking University October 13, 2011 J/ψ production related analysis at Belle 1 Outline e + e - J/ψ ρ (φ) Introduction Monte Carlo simulation
More informatione + e results from BaBar, status of muon (g-2) prediction and τ mass measurement at BESIII
e + e results from BaBar, status of muon (g-2) prediction and τ mass measurement at BESIII (IHEP-LAL collaboration) Liangliang WANG Outline Introduction to hadronic vacuum polarization ee hadrons results
More informationResults and prospects on hadronic cross section and γγ physics at KLOE/KLOE-2
Results and prospects on hadronic cross section and γγ physics at KLOE/KLOE-2 Giuseppe Mandaglio (for the KLOE2 Collaboration) Dipartimento di Fisica e di Scienze della Terra University of Messina INFN-
More informationElectroweak Physics at the Tevatron
Electroweak Physics at the Tevatron Adam Lyon / Fermilab for the DØ and CDF collaborations 15 th Topical Conference on Hadron Collider Physics June 2004 Outline Importance Methodology Single Boson Measurements
More informationNew Measurements of ψ(3770) Resonance Parameters & DD-bar Cross Section at BES-II & CLEO-c
New Measurements of ψ(3770) Resonance Parameters & DD-bar Cross Section at BES-II & CLEO-c The review talk is based on the talks given at ICHEP 04 by Anders Ryd, Ian Shipsey, Gang Rong 1 Outline Introduction
More informationMeasurements of the Cross Section for the Process γγ pp at s ee = GeV with the OPAL Detector at LEP
Measurements of the Cross Section for the Process γγ pp at s ee = 183 189 GeV with the OPAL Detector at LEP Teresa Barillari, MPI Munich Photon 2003, Frascati 10 April 2003 Introduction Kinematics Theory
More informationPoS(ICHEP2012)049. Study of tau-pair production at HERA. Masaki Ishitsuka Tokyo Institute of Technology
Tokyo Institute of Technology E-mail: ishitsuka@phys.titech.ac.jp for ZEUS Collaboration A study of tau-pair production has been performed with the ZEUS detector at HERA ep collider, using a data sample
More informationMeasurements of e + e hadrons at VEPP-2M
Measurements of e + e hadrons at VEPP-2M B.Khazin Budker Institute of Nuclear Physics Novosibirsk Centerville, Cape Cod, MA 19-22 June 2006 Cross-section section e + e - hadrons VEPP-2M energy range :
More informationAbsolute D Hadronic Branching Fractions at CLEO-c
Absolute D Hadronic Branching Fractions at CLEO-c Xin Shi Cornell University CLEO Collaboration Lake Louise Winter Institute 24 February 2011 Xin Shi (Cornell University) Absolute D Hadronic BFs at CLEO-c
More information> 12 GeV. (a) Value 43% 7-12 GeV 11% 13% 11% 9% 8% (b) Uncertainty. narrow resonan ces 14% 31% 11% ρ 25%
Measurement of R Between 2-5 GeV Derrick Kong University of Hawaii We have obtained measurements of the total cross section for e + e? annihilation into hadronic nal states for 6 energy points (2.6, 3.2,
More informationD D Shape. Speaker: Yi FANG for BESIII Collaboration. The 7th International Workshop on Charm Physics May 18-22, 2015 Detroit, Michigan
D D Shape Speaker: Yi FANG for BESIII Collaboration The 7th International Workshop on Charm Physics May 18-22, 2015 Detroit, Michigan Y. Fang (IHEP) D D Shape Charm 2015 1 / 16 Outline 1 Introduction 2
More informationMeasurement 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 informationThe reaction p(e,e'p)π 0 to calibrate the Forward and the Large Angle Electromagnetic Shower Calorimeters
The reaction p(e,e'p)π 0 to calibrate the Forward and the Large Angle Electromagnetic Shower Calorimeters M.Battaglieri, M.Anghinolfi, P.Corvisiero, A.Longhi, M.Ripani, M.Taiuti Istituto Nazionale di Fisica
More informationMeasurement of the hadronic cross section at KLOE
Debora Leone Institut für Experimetelle Kernphysik Universität Karlsruhe Tau04 Nara 14-17/09/2004 Measurement of the hadronic cross section at KLOE a µ theory vs. experiment Status up to July 04 THEORY
More informationSearch for the η e + e - decay at the SND detector
Search for the η e + e - decay at the SND detector Berdyugin A.V. SND VEPP-2000 SND detector at VEPP-2000 NIM A449 (2000) 125-139 1 beam pipe, 2 tracking system, 3 aerogel Cherenkov counter, 4 NaI(Tl)
More informationATLAS-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 informationWolfgang Gradl. on behalf of the BABAR collaboration. Tau 2016, Beijing 23 rd September 2016
ISR K u K u π (π ) Wolfgang Gradl on behalf of the collaboration Tau 216, Beijing 23 rd September 216 Motivation γ µ QED is precision physics u l 1 2 (u 2) l testbed for QED experimentally: electron ok
More informationStudy of di-muon production with the ZEUS detector at HERA
Submitted to the International Conference on High Energy Physics 16-22 August 2004, Beijing, China Abstract: EW 4-0231, BSM 12-0230 Sessions: Electro Weak, Beyond the Standard Model Study of di-muon production
More informationPRECISION&MEASUREMENTS&
PRECISION&MEASUREMENTS& AT&Z&RESONANCE Z&Lineshape&and&number&of&neutrinos Lecture'2 Shahram&Rahatlou Fisica&delle&Par,celle&Elementari,&Anno&Accademico&2138214 http://www.roma1.infn.it/people/rahatlou/particelle/
More informationContents. What Are We Looking For? Predicted D
Contents D * e S DS e Souvik Das, Anders Ryd Cornell University What Are We Looking For? Predicted D * S D S e e - Rate Decay Modes of D S Used Fitting Soft Electrons Signal Samples Background Samples
More informationStandard Model of Particle Physics SS 2012
Lecture: Standard Model of Particle Physics Heidelberg SS 2012 Experimental Tests of QED Part 2 1 Overview PART I Cross Sections and QED tests Accelerator Facilities + Experimental Results and Tests PART
More informationJet Energy Calibration. Beate Heinemann University of Liverpool
Jet Energy Calibration Beate Heinemann University of Liverpool Fermilab, August 14th 2006 1 Outline Introduction CDF and D0 calorimeters Response corrections Multiple interactions η-dependent corrections
More information* ) B s( * ) B s( - 2 -
- 1 - ϒ Λ B s( * ) B s( * ) ϒ B s( * ) Λ B s( * ) - 2 - ϒ(5S) Study at CLEO CLEO studies B s in both inclusive and exclusive modes. Data was taken with the CLEO III detector. Data set ϒ(5S) ϒ(4S) Continuum
More informationSearch for a Dark Photon: proposal for the experiment at VEPP 3.
Search for a Dark Photon: proposal for the experiment at VEPP 3. I.Rachek, B.Wojtsekhowski, D.Nikolenko IEBWorkshop Cornell University June 18, 015 I.Rachek dark photon at VEPP-3 June 18, 015 1 Latest
More informationMeasurement of the e + e - π 0 γ cross section at SND
Measurement of the e + e - π 0 γ cross section at SND L.Kardapoltsev (for SND collaboration) Budker Institute of Nuclear Physics, Novosibirsk state university PhiPsi 2017, Mainz, Germany June 2017 Outline
More informationStandard Model of Particle Physics SS 2013
Lecture: Standard Model of Particle Physics Heidelberg SS 2012 Experimental Tests of QED Part 2 1 Overview PART I Cross Sections and QED tests Accelerator Facilities + Experimental Results and Tests PART
More informationMeasurement of the Inclusive Isolated Prompt Photon Cross Section at CDF
of the Inclusive Isolated Cross at IFAE Barcelona HEP Seminar University of Virginia Outline Theoretical introduction Prompt photon production The The Photon detection prediction The pqcd NLO prediction
More informationDilepton Forward-Backward Asymmetry and electroweak mixing angle at ATLAS and CMS
Dilepton Forward-Backward Asymmetry and electroweak mixing angle at ATLAS and CMS University of Rochester E-mail: jyhan@fnal.gov We present measurements of the forward-backward asymmetry in Drell-Yan dilepton
More informationLepton Universality in ϒ(nS) Decays at CLEO
Hajime Muramatsu, University of Rochester BNM2008@ATAMI JAPAN JAN/2008 1 Lepton Universality in ϒ(nS) Decays at CLEO Hajime Muramatsu University of Rochester For the CLEO Collaboration Hajime Muramatsu,
More informationHow to Measure Top Quark Mass with CMS Detector??? Ijaz Ahmed Comsats Institute of Information Technology, Islamabad
How to Measure Top Quark Mass with CMS Detector??? Ijaz Ahmed Comsats Institute of Information Technology, Islamabad Outlines o o o o o o o High Pt top basic idea Methods for jets selection Top quark mass
More informationLuminosity Determination
M2 de Physique École Normale Supérieure de Lyon Université Claude Bernard Lyon 1 Master Thesis HAFNER, Andreas M2 Option Physique BABAR Luminosity Determination Abstract: The project consists of a precise
More informationMuon reconstruction performance in ATLAS at Run-2
2 Muon reconstruction performance in ATLAS at Run-2 Hannah Herde on behalf of the ATLAS Collaboration Brandeis University (US) E-mail: hannah.herde@cern.ch ATL-PHYS-PROC-205-2 5 October 205 The ATLAS muon
More informationStudy of e + e - àγωj/ψ at BESIII
Study of e + e - àγωj/ψ at BESIII Liu Zhiqing Johannes Gutenberg Universität Mainz liuz@uni-mainz.de X(3872) BàKX(3872) Confirmed by 7 independent experiments (Belle, BABAR, LHCb, CDF, D0, CMS, BESIII)
More informationStatus of the Crystal Zero Degree Detector (czdd)
Status of the Crystal Zero Degree Detector (czdd) Achim Denig1, Peter Drexler1, Brice 1, Leonard Koch2, Wolfgang Kühn2, Sören Lange2, Werner Lauth1, Yutie Liang2, Torben Rathmann1, Christoph Redmer1, Milan
More informationSearching for the Randall-Sundrum Graviton decay to dielectron pairs. Meghan Frate Bucknell University
Searching for the Randall-Sundrum Graviton decay to dielectron pairs Meghan Frate Bucknell University 1 The Project Look for evidence of the Randall- Sundrum Graviton using ee events at the LHC using the
More informationLEP-style counting in luminosity measurement at CepC
LEP-style counting in luminosity measurement at CepC S. Luki Vin a institute of nuclear sciences, University of Belgrade Lumical meeting, online, Sep. 29, 2017 S. Luki, Lumical meeting, online, Sep. 29,
More informationR at CLEO Surik Mehrabyan University of Puerto Rico at Mayaguez on behalf of CLEO collaboration Heavy Quarkonium 2006 June BNL
R at CLEO Surik Mehrabyan University of Puerto Rico at Mayaguez on behalf of CLEO collaboration Heavy Quarkonium 2006 June 27-30 BNL Overview The ratio of lowest order cross section for hadrons and µ-pair
More informationTesi di Laurea Specialistica
Search for heavy particles decaying into ψ(2s)π + π produced in e + e collisions with Initial State Radiation. Tesi di Laurea Specialistica Candidato: Stefano Zambito Relatore: Prof. Fabrizio Bianchi1
More informationCalibration of the BABAR CsI (Tl) calorimeter
Journal of Physics: Conference Series Calibration of the BABAR CsI (Tl) calorimeter To cite this article: Jörg Marks and the Calorimeter Group of the BARBAR Collaboration 2009 J. Phys.: Conf. Ser. 60 02005
More informationStudies of the diffractive photoproduction of isolated photons at HERA
Studies of the diffractive photoproduction of isolated photons at HERA P. J. Bussey School of Physics and Astronomy University of Glasgow Glasgow, United Kingdom, G12 8QQ E-mail: peter.bussey@glasgow.ac.uk
More informationPhysics at Hadron Colliders Part II
Physics at Hadron Colliders Part II Marina Cobal Università di Udine 1 The structure of an event One incoming parton from each of the protons enters the hard process, where then a number of outgoing particles
More informationLatest KLOE-2 results on hadron physics
Latest KLOE- results on hadron physics on behalf the KLOE- collaboration INFN-Sez. Roma "Tor Vergata", Via della Ricerca Scientifica, I-00, Rome E-mail: Dario.Moricciani@roma.infn.it We discuss recent
More informationRecent results from SND detector
Recent results from SND detector Dmitry Shtol Budker Institute of Nuclear Physics, Novosibirsk State University, Novosibirsk, Russia HADRON-2015 13-19 September, 2015 VEPP-2000 e + e - collider center-of-mass
More informationPoS(EPS-HEP2015)565. Study of the radiative tau decays τ γlνν with the BABAR detector. Roger Barlow
Study of the radiative tau decays τ γlνν with the BABAR detector University of Huddersfield (GB) E-mail: roger.barlow@cern.ch We present measurements of the branching fraction for the radiative τ leptonic
More informationSearches for Leptonic Decays of the B-meson at BaBar
Searches for Leptonic Decays of the B-meson at BaBar Stephen Jacob Sekula (MIT) on behalf of the BaBar collaboration Presented at Frontiers in Contemporary Physics III Vanderbilt University May 22-28,
More informationCDF top quark " $ )(! # % & '
$% CDF quark 7 3 5 ( "#! Tevatron Run II Started Spring 1. proton-antiproton collider with (Run I :. antiproton recycler commissioning electron cooling operational by Summer 5. increase in luminosity.
More informationDedicated Arrays: MEDEA GDR studies (E γ = MeV) Highly excited CN E*~ MeV, 4 T 8 MeV
Dedicated Arrays: MEDEA GDR studies (E γ = 10-25 MeV) Highly excited CN E*~ 250-350 MeV, 4 T 8 MeV γ-ray spectrum intermediate energy region 10 MeV/A E beam 100 MeV/A - large variety of emitted particles
More informationRecent results on exclusive hadronic cross sections measurements with the BABAR detector
Recent results on exclusive hadronic cross sections measurements with the BABAR detector Claudia Patrignani representing the BABAR Collaboration Università di Bologna and I.N.F.N. Claudia.Patrignani@bo.infn.it
More informationConference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
Available on the CMS information server CMS CR 212/178 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH211 GENEVA 23, Switzerland 212//9 Measurement of isolated photon
More informationStudy of e + e annihilation to hadrons at low energies at BABAR
Study of e + e annihilation to hadrons at low energies at BABAR V.Druzhinin Novosibirsk State University, BINP, Novosibirsk on behalf of the BABAR Collaboration International Symposium Advances in Dark
More informationHiggs 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 informationPhysics at Hadron Colliders
Physics at Hadron Colliders Part 2 Standard Model Physics Test of Quantum Chromodynamics - Jet production - W/Z production - Production of Top quarks Precision measurements -W mass - Top-quark mass QCD
More informationSearch 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 informationIdentification 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 informationCurrent status and results of the experiments at VEPP-2000
Current status and results of the experiments at VEPP-2000 Boris Shwartz, BINP, Novosibirsk, Introduction VEPP-2000 status Detectors Preliminary results 17.06.2013 MesonNet meeting, Prague, Czech Republic
More informationResults on Tau Physics from BaBar
Results on Tau Physics from BaBar Eric Torrence University of Oregon Search for Lepton Flavor Violation Study of τ 3h 2h + ν τ (5 prong) Tau Lifetime The BaBar Experiment Integrated Luminosity (fb -1 )
More informationOutline: Absolute Charm Branching Fractions D0 and D+ Rare and inclusive modes Final states with KS or KL. Anders Ryd Cornell University Presented at
Determination of Hadronic Branching Ratios and New Modes Anders Ryd Cornell University Presented at FPCP Bled, Slovenia May 12-16, 2007 Outline: Absolute Charm Branching Fractions D0 and D+ Ds Rare and
More informationIntro to Nuclear and Particle Physics (5110)
Intro to Nuclear and Particle Physics (5110) March 23, 2009 From Nuclear to Particle Physics 3/23/2009 1 Nuclear Physics Particle Physics Two fields divided by a common set of tools Theory: fundamental
More informationSearch for Lepton Flavour Violation (LFV) in Three-Body Tau Decays at BaBar
SLACPUB1147 August 005 1 Search for Lepton Flavour Violation (LFV) in ThreeBody Tau Decays at BaBar M. Hodgkinson (on behalf of the BaBar collaboration) a a High Energy Physics Group, University of Manchester,
More informationRecent results and perspectives on pseudo-scalar mesons and form factors at BES III
Meson Physics in Low-Energy QCD Workshop on Meson Transition Form Factors Recent results and perspectives on pseudo-scalar mesons and form factors at BES III Elisabetta Prencipe Johannes Gutenberg University
More informationτ Physics at B-factories.
τ Physics at B-factories. University of Oregon March, 006 B-factories are τ-factories Standard Model tests Analysis of hadronic τ decays Searches for lepton flavour violating τ decays τ physics at Υ(4S)
More informatione e with ISR and the Rb Scan at BaBar
e e with ISR and the Rb Scan at BaBar + + Francesco Renga Università di Roma La Sapienza & INFN Roma on behalf of the BaBar Collaboration 1 Introduction B Factories showed an exciting capability for improving
More informationSEARCH FOR CP VIOLATION IN
BELLE SEARCH FOR CP VIOLATION IN RADIATIVE AND HADRONIC D DECAYS AT BELLE Tara Nanut on behalf of the Belle Collaboration The XIIIth International Conference on Heavy Quarks and Leptons 6 May 16 1 { Tara
More informationMeasurement of the associated production of direct photons and jets with the Atlas experiment at LHC. Michele Cascella
Measurement of the associated production of direct photons and jets with the Atlas experiment at LHC Michele Cascella Graduate Course in Physics University of Pisa The School of Graduate Studies in Basic
More informationResults From The HARP Experiment
Results From The HARP Experiment Lara Howlett University of Sheffield Overview of HARP and forward analysis Al analysis for K2K experiment Be analysis for MiniBooNE experiment Motivations Systematic study
More informationFirst Observation of the
First Observation of the Bottomonium Ground State b (1S) Peter Kim SLAC National Accelerator Laboratory (BaBar Collaboration) KEK Seminar Dec. 8, 2008 Discovery of the bottom quark E288 at Fermilab: p
More informationStandard Model at the LHC (Lecture 3: Measurement of Cross-Sections) M. Schott (CERN)
Standard Model at the LHC (Lecture 3: Measurement of Cross-Sections) M. Schott (CERN) Content 1 Measuring Cross-Sections 2 Hands-On 3 Background Estimations 4 Detector Calibration 5 Recent LHC Results
More informationATLAS NOTE. September 26, 2016
Draft version 0.3 ATLAS NOTE September 26, 2016 1 2 Search for Higgs pair production with decays to WW(jjjj) and γγ in 22.1 fb 1 proton-proton collision data at 13 TeV in the ATLAS detector 3 Yaquan Fang
More informationJuliet Lee-Franzini. Laboratori Nazionali di Frascati. Cape Cod, June 2003
σ(e + e hadrons+γ) Juliet Lee-Franzini Laboratori Nazionali di Frascati Cape Cod, June 2003 1. Why measure σ(hadrons+γ) 2. σ had (s ) at fixed s 3. Advantages 4. Dadvantages 5. First results from KLOE
More informationHiggs-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 informationHadron Form Factors in BESIII
BESIII Hadron Form Factors in BESIII Cristina Morales (Helmholtz-Institut Mainz) on behalf of BESIII-Collaboration Outline: Experiment Motivation Nucleon Electromagnetic Form Factors Hyperon Electromagnetic
More informationMeasurement of Properties of Electroweak Bosons with the DØ Detector
Measurement of Properties of Electroweak Bosons with the DØ Detector Laboratoire de Physique Subatomique et de Cosmologie, 53, rue des Martyrs, 38026, Grenoble Cedex, France. E-mail: Hengne.Li@in2p3.fr
More informationMEASUREMENT OF THE PROTON ELECTROMAGNETIC FORM FACTORS AT BABAR arxiv: v1 [hep-ex] 29 Nov 2013
MEASUREMENT OF THE PROTON ELECTROMAGNETIC FORM FACTORS AT BABAR arxiv:1311.7517v1 [hep-ex] 29 Nov 213 V. P. Druzhinin, on behalf of the BABAR Collaboration Budker Institute of Nuclear Physics SB RAS, Novosibirsk
More informationBESIII Analysis Memo
Memo version. BESIII Analysis Memo BAM-9 January, 7 9 Measurement of Proton Electromagnetic Form Factors in e e p p in energy region. -. GeV L. Xia,a, Z. Zeng,a, X. L. Gao,a, and G. S. Huang,a, D. Liu,a,
More informationetectors for High Energy Physics
3rd WORKSHOP ON PARTICLE PHYSICS NATIONAL CENTRE FOR PHYSICS (QUAID-I-AZAM UNIVERSITY) etectors for High Energy Physics Lecture II General Detector Concepts Gigi Rolandi Cern Geneva - Switzerland http://rolandi.home.cern.ch/rolandi/
More informationZ boson studies at the ATLAS experiment at CERN. Giacomo Artoni Ph.D Thesis Project June 6, 2011
Z boson studies at the ATLAS experiment at CERN Giacomo Artoni Ph.D Thesis Project June 6, 2011 Outline Introduction to the LHC and ATLAS ((Very) Brief) Z boson history Measurement of σ Backgrounds Acceptances
More informationResults from BABAR/PEP-II - One Year of Operations
SLAC-PUB-9158 March 22 Results from /PEP-II - One Year of Operations Paul C. Bloom Representing the Collaboration Presented at the 4th International Conference on Hyperons, Charm and Beauty Hadrons, 6/27/2
More informationObservation of Isolated High-E T Photons in Photoproduction at HERA
University of Wisconsin January1999 Observation of Isolated High-E T Photons in Photoproduction at HERA ZEUS Collaboration introduction prompt photons in photoproduction at HERA event selection rejecting
More informationHigh Pt Top Quark Mass Reconstruction in CMS
High Pt Top Quark Mass Reconstruction in CMS IJAZ AHMED National Centre for Physics (NCP), Islamabad First IPM meeting on LHC Physics, April 20-24 24 2009 Isfahan,, Iran Outlines o o o o o o o o o o Introduction
More informationNEW MEASUREMENTS OF THE 7 LEPTON MASS* ABSTRACT
SLAC-PUB-5977 October 1992 E... NEW MEASUREMENTS OF THE 7 LEPTON MASS* HELMUT MARSISKE Stanford Linear Accelerator Center Stanford University, Stanford, California 94309 ABSTRACT We report on recent measurements
More informationCentral Meson Production in ALICE
Central Meson Production in ALICE ALICE detector Selection of central diffractive single/double gap events Central Meson production in pp-collisions at s = 7 TeV Analysis of f0(980) and f2(1270) production
More information