Text. Decays of heavy flavour hadrons measured by CMS and ATLAS. M.Smizanska, Lancaster University
|
|
- Kevin Wood
- 5 years ago
- Views:
Transcription
1 Text Decays of heavy flavour hadrons measured by CMS and ATLAS M.
2 Outline Data collection and B-trigger strategies ID performance with increasing pileup Lifetimes B avg Bs, Bd Masses Λ b Bc Searches for rare decays B µµ Summary
3 ATLAS and CMS data taking 3 LHCb, ATLAS, CMS collected similar integrated luminosities - thus number of collected B- hadrons and Onia (in muon channels) roughly proportional to the production cross sections in respective fiducial volumes. ATLAS, CMS benefit from being able to collect data at increasing LHC instantaneous luminosity To benefit from higher integrated luminosity B-physics groups in ATLAS/CMS paid special attention to: B-physics triggers and stability of tracking, vertexing performance with growing pileup 3
4 ATLAS, CMS B-triggers in 4 In ATLAS, CMS di-muon triggers dominate B-trigger menus. Siingle muon triggers - prescaled CMS ATLAS low pt thresholds in a narrow mass windows events over whole mass region with a di-muon trigger with high pt thresholds "quarkonium" dimuon trigger during the first pb only pt thresholds 4&4 GeV or 4&6 GeV with masses in J/ψ ( GeV), B (4-8.5 GeV) and Υ (8 GeV) the combined range of all three (.54 GeV) a higher pt trigger ( GeV) di-muon events over whole mass region ATLAS, CMS di-muon triggers performed online tracking & vertexing, accepting only a good quality vertices. In ATLAS NO displaced vertex cuts applied at trigger level during whole in B-physics menu Events per MeV Run, L =. fb J/! CMS s = 7 TeV!' $ % B s # trigger paths!' J/! - B " µ + s µ # low p double muon T high p double muon T Z dimuon mass [GeV] 4
5 Tracking-vertexing performance in pileup 5 Z Vertex Resolution [mm] ATLAS Preliminary Data, Random Trigger Minimum Bias MC CMS preliminary Transv.Impact Parameter Resolution (µm) Data track! <.4 Simulation track! <.4 s = 7 TeV Excellent modeling of pixel hit resolution, multiple scattering, alignment Track p (GeV/c) hia (Uni. Zürich) Heavy flavor physics with T the CM 4 CMS-PAS-TRK--5 CMS preliminary Vertex Eur.Phys.J. resolution C7 () important p.65 for precision B-physics s = 7 measurements: TeV lifetime, CPV, rare decays. Quality of vertexing monitored over as pileup increased. Data track! <.4 Vertex resolution vs. number of tracks and Simulation track! <.4 ATLAS (top average left) pt d of reconstructed track with respect to the PV for different number of pileups. The tails are sensitive to the rate of secondaries and fakes. No significant increase in the fake rate observed. Figure 6: Measured resolution of the track transverse (a) and longitudinal (b) impact parameter as a function of the track p T. Only central tracks with η <.4 are considered. Black and red symbols correspond to results from data and simulation, respectively. (b) (a) CMS (top right) excellent modelling of d resolution. Data / MC Number of tracks For each track passing these criteria, the unbiased position of the collision point is determined using all and only the other tracks in the event with the vertex fitter described in Section. The uncertainty on the position is estimated from the vertex fit and it is used to filter the newly reconstructed vertexes. If the errors on the x and y (z) coordinates of the vertex position are within 5 37 µm ( 36 µm), a vertex-track pair is created and used in the next step of the analysis. These cuts on the position error have been chosen as a trade-off between selecting vertexes that are very precisely reconstructed and having enough vertexes passing the selec- ATLAS,CMS d precision strongly improves as trigger thresholds lead to higher pt over. Good z-resolution of PV important at high luminosities. Figure : Primary vertex resolution in x (a), y (b), and z (c) as a f for different average transverse momentum p T. The Pythia8 Tu (c) 5
6 B-lifetime measurements 6 Candidates / (.45 cm ) Events / (. cm) 3 (b) CMS s = 7 TeV L = 4 pb CMS data Prompt J/! + non-peaking B + peaking B + signal ct (cm) 4 3 Bd J/ψ K S CMS Preliminary s=7 TeV, L=4pb Bs J/ψ φ ctau (cm) Time measurements already in consistent with PDG ATLAS, CMS well prepared to measure time-dependent CPV and rare decays - requiring good vertexing τ, ps PDG τ, ps Bd ATLAS-CONF--9 4 pb.5 ±.4 (stat) ±.4 (syst).55 ±.9 Bd CMS PR Lett. 6:5, 4 pb cτ = 479 ± μm 457 ± 3 μm Bs ATLAS-CONF--9 4 pb.4 ±.8 (stat) ±.5 (syst).47 ±.6 Bs CMS PRD84, 58() 4 pb cτ = 478 ± 6 μm 49. ±8.7 μm B-average ATLAS-CONF pb.489 ±.6 (stat) ±.43 (syst).544 ±.4 ps *) B J/ψ X Bd J/ψ K * Bs J/ψ φ B 6
7 B-hadrons mass signals, updates 7 - masses of all B-hadrons measured in exclusive decays with J/ψ(µµ) Consistency with PDG - showed that pt scale well understood also down to low pt values covered by beauty Latest updates using data shown here for Λb (CMS, ATLAS) and Bc (ATLAS) Events / ( 7 MeV ) ATLAS Preliminary Bc J/ψ π m Bc = 68 ± N Bc = 8 ± # = 36 ± 7 (stat.) 7 (stat.) 9 (stat.) MeV MeV $ Ldt = 4.3 fb s = 7 TeV ATLAS-CONF (MeV) m J/"! Events / (. GeV ) Λb J/ψ Λ Twiki BPH7 CMS preliminary s = 7 TeV L =.8 fb ATLAS-CONF Figure : Invariant mass distribution of reconstructed B ± c J/ψπ ± candidates. The points with error bars are the data. The solid line is the projection of the results of the unbinned maximum likelihood fit to all candidates in the mass range MeV. The dashed line is the projection for the background component on the same fit. References [] CDF Collaboration, F. Abe et al., Observation of the B c Meson in pp Collisions at s =.8 TeV, Phys. Rev. Lett. 8 (998) 43. [] CDF Collaboration, A. Abulencia et al., Evidence for the exclusive decay B ± c J/ψπ ± and measurement of the mass of the B c meson, Phys. Rev. Lett. 96 (6) [3] CDF Collaboration, Λb J/ψ T. ΛAaltonen et al., Measurement of the B c Lifetime in B ± c J/ψ + l ± + X Decays, Phys. Rev. Lett. (8) 8. [4] D Collaboration, V. M. Abazov et al., Measurement of the B c meson mass in the exclusive decay B c J/ψπ, Phys. Rev. Lett. (8) m!b (GeV) [5] LHCb Collaboration, Measurement of the B + c to B + production cross-section ratio at s = 7TeV in LHCb, LHCb-CONF--7 (). [6] E. Eichten, C. Quigg, Mesons with beauty and charm: Spectroscopy, Phys. Rev. D 49 (994) [7] S. S. Gershtein et al., B c spectroscopy, Phys. Rev. D 5 (995) 363. [8] R. Roncaglia et al., Predicting the masses of heavy hadrons without an explicit Hamiltonian, Phys. Rev. D 5 (995) 48. 7
8 Rare B decays B µµ: search for New Physics 8 Rare decays highly suppressed in SM both FCNC and helicity suppression SM prediction is rather precise ( no hadronic uncertainties) BR(Bs µµ)= (3. ±.) x -9 BR(Bd µµ)= (. ±.) x - A.J.Buras: arxiv:.447, E. Gamiz et al: Phys.Rev.D 8 (9) 453 BR are sensitive to new physics In SM ratio: B b t Z, + + W, H d/s d/s b B s/d d/s 6 t H,h... + ~ + W, χ µ + ~ ~ t,c,u q l ν W ~, χ µ µ + µ ( ) #m d $ d ˆ ( ) #m s $ s ˆ r = BR B "µµ s BR B d "µµ B Bs SM B Bd % sensitive tester 8
9 Search for Bs µµ in ATLAS 9 ATLAS is presenting result on Bs μμ limit using.4 fb collected with di-muon triggers in data Method Selection based on Use a reference channel: ( ) = N B s " µµ BR B s "µµ 4 variables N J /#K ± Multivariate analysis (BDT) 5% of sideband events to model background 5% of other sideband events to optimise BDT Efficiencies & acceptances $ tot % J /#K ±& J /#K ± tot $ % Bs " µµ& Bs " µµ Derived from MC(calibrated on data) Reference channel (B ± J/ψK ± ) selected with as-closeas-possible selection Bs J/ψφ data used for MC validation f u $ BR( B ± "J /#K ± ) f s /(4.45±.38)! 3 [PDG + LHCb] Limit of BR is placed using CLs method (frequentist method optimal for setting exclusion limits) Stability of isolation I ΔR (one of the selection variables) at growing pileup. Isolation cut efficiency extended to all non- B daughters within R, and p T >.5 GeV B ± J/ψK ± M.C., isolation with PV association M.C., isolation without PV association Data, isolation with PV association Data, isolation without PV association ATLAS preliminary s = 7 TeV Ldt =.4 fb SV PV P t (B s ) Number of primary vertices 9
10 ATLAS results on Bs µµ Events/ B s µ µ MC ( ) preliminary s = 7 TeV Ldt =.4 fb.5 6 MeV resolution η < Sidebands 8 MeV resolution < η <.5.5 MeV resolution.5 < η < m µ µ [MeV] Events/6 MeV Data + - B s µ µ MC ( ) ATLAS preliminary s = 7 TeV Ldt =.4 fb Events/6 MeV Data + - B s µ µ MC ( ) ATLAS preliminary s = 7 TeV Ldt =.4 fb Events/6 MeV Data + - B s µ µ MC ( ) ATLAS preliminary s = 7 TeV Ldt =.4 fb m µ µ [MeV] m µ µ [MeV] m µ µ [MeV] Optimised search window Figure 7: Invariant mass distribution of candidates in data. For each invariant mass category (top to bottom) each plot shows the invariant mass distribution for the selected candidates in data (dots), the signal (continuous line) as predicted by MC assuming BR(Bs µ + µ ) = 3.5 8, and two vertical lines corresponding to the optimized m cut. The grey areas correspond to the sidebands used in the analysis. unblinded di-muon invariant mass in 3 search windows to 8 and the 95% expected limit is equal to , confirming the expectation for a more sensitive analysis when separate mass-resolution categories are used. The background counts found in odd-numbered events
11 ATLAS upper limit on Bs µµ.4 fb Expected and observed CLs as a function of BR(Bs µ+µ-) The 95% CL limit indicated by the red line. BR(Bs"μμ) <.! 95% CLs The yellow and green bands: ±σ and ±σ fluctuations on the expectation (dashed line) based on pseudo experiments with setting the counts in the search window to the interpolated background + resonant background - before unblinding the region
12 CMS search for Bs µµ and Bd µµ Previous CMS results. fb, PRL, 7, 98. New result presented here is using 4.9 fb Measurement of Bs µ+µ relative to normalization channel: similar trigger and selection to reduce systematic uncertainties B(B s µ+ µ ; 95%C.L.) = N(n obs,n B,n S ; 95%C.L.) ε B s N B s = N(n obs,n B,n S ) ε B s L σ(pp B s ) = N(n obs,n B,n S ) N(B ± J/ψ K ± ) Calibration/validation of MC: Calibration/validation of MC: B ± J/ψK ± with high statistics Control sample Bs J/ψ φ validation of Bs signal MC Analysis in two subsets A B + ε A B s ana B + ε ana B s ε µ B + ε µ B s ε trig B + ε trig B s f u f s B(B + J/ψ [µ + µ ]K) barrel (both muons η <.4): better signal/background ratio good mass resolution (36 MeV) endcap (at least one muon with η >.4): add more statistics [σ(m) 7 MeV] Analysis is (still) cut-n-count Analysis was performed blind total amount of data: 4.9 fb
13 CMS results on Bs µµ, Bd µµ 3 Variable B µ + µ Barrel B s µ+ µ Barrel B µ + µ Endcap B s µ+ µ Endcap Signal.4 ±..7 ±.4. ±..3 ±.8 Combinatorial bg.4 ± ±.5.76 ±.35.4 ±.53 Peaking bg.33 ±.7.8 ±.6.5 ±.3.8 ±. Sum.97 ± ±.65. ± ±.56 Observed 4 Candidates /.5 GeV CMS, 4.9 fb Preliminary s = 7 TeV B s B Barrel signal window signal window Candidates /.5 GeV 4 3 CMS, 4.9 fb Preliminary s = 7 TeV 5 B s B Endcap signal window signal window [GeV] m µµ [GeV] unblinded di-muon invariant mass in the barrel (left) and endcap (right) m µµ 3
14 CMS upper limits on Bs µµ, Bd µµ 4 B B upper limit (95%CL) observed (median) expected B(B s µ+ µ ) B(B µ + µ ) values (for background-only hypotheses).4.3 CMS Preliminary 4.9 fb, s = 7 TeV Observed CLs+b Expected CLs+b - Median Expected CLs+b ± # Expected CLs+b ± # Expected and observed CLs as a function of BR(Bs µ+µ-) The 95% CL limit is indicated by the red line... SM expectation bands B(B!µµ) s -9 " The yellow and green bands: ±σ and ±σ predictions on the expectation. A median expected limit of 8.4 x -9 at 95% CL determined from background + SM signal pseudoexperiments 4
15 Current status 5 LHCb CMS 4.9 CDF CDF fb 95% double sided A. Cerri - LHC Seminar March 6th 5
16 Conclusions 6 good quality data of ~ 5 fb collected by each ATLAS/CMS allowed substantially increased statistics of B-hadrons with two muons in final states relative to Observed stable performance (tracking, vertexing) with increasing pileup - basic for good quality B-physics measurements B-lifetimes, masses consistent with PDG - excellent pt calibration vertexing and alignment - well equipped to measure CPV in particular in Bs J/ψφ Rare decays limits extracted: by CMS and ATLAS Upper limit at 95% CL Bs µ + µ Bd µ+µ CMS 4.5 fb ATLAS.4 fb. -8 6
17 Backup 7 7
18 Current results 8 Upper limits 95% CL Bs μ + μ Bd μ+μ D ) 5. 8 CDF ) ( ) CMS older 4) LHCb 3) ATLAS. -8 ) 6. fb, PL, B693, 539 ) fb P u b l i c N o t e i n p r o g r e s s --9 (previous result 7 fb, P R L, 7, 98 ) 3) fb, LHCb-PAPER--7 4). fb, PRL, 7, 98 CMS
19 CMS 9 CL s+b.4.3 B CMS Preliminary 4.9 fb, s = 7 TeV Observed CLs+b Expected CLs+b - Median Expected CLs+b ± # Expected CLs+b ± # CL s.4.3 CMS Preliminary 4.9 fb, s = 7 TeV Observed CLs Expected CLs - Median Expected CLs ± # Expected CLs ± #. SM expectation bands B(B!µµ) s -9 " B(B!µµ) s -9 " Expected CLs as a function of BR(Bs µ+µ-) for Left: determined from background + SM signal pseudo-experiments RIght: background only 9
b hadron properties and decays (ATLAS)
b hadron properties and decays (ATLAS) Milind V. Purohit Univ. of South Carolina, USA for the ATLAS collaboration M. V. Purohit SM@LHC 2012 1 Outline Detector, Di muon trigger, Performance: Mass, vertex
More informationSearches for BSM Physics in Rare B-Decays in ATLAS
Searches for BSM Physics in Rare B-Decays in ATLAS Iskander Ibragimov on behalf of the ATLAS Collaboration SUSY 14 The nd International Conference on Supersymmetry and Unification of Fundamental Interactions
More informationPoS(ICHEP2012)238. Search for B 0 s µ + µ and other exclusive B decays with the ATLAS detector. Paolo Iengo
Search for B s µ + µ and other exclusive B decays with the ATLAS detector. On behalf of the ATLAS Collaboration INFN Naples, Italy E-mail: paolo.iengo@cern.ch The ATLAS experiment, collecting data in pp
More informationRare B Meson Decays at Tevatron
Rare B Meson Decays at Tevatron Walter Hopkins CDF and DØ Collaborations Cornell University FPCP 2011 Walter Hopkins (CDF and DØ Collaborations, Cornell University)Rare B Meson Decays at Tevatron FPCP
More informationSearch for the very rare decays B s/d + - at LHCb
Search for the very rare decays B s/d + - at LHCb Justine Serrano Centre de Physique des Particules de Marseille On behalf of the LHCb collaboration EPS-HEP, July 22 th 2011, Grenoble Bs2MuMu @ LHCb Justine
More informationStudies of rare B meson decays with the CMS detector
Studies of rare B meson decays with the detector J.Pazzini on behalf of the Collaboration Padova University & INFN - August - 3 J.Pazzini Studies of rare B meson decays with the detector (SUSY3) Introduction
More informationB-physics with ATLAS and CMS
Physics at LHC-2008 Split-CROATIA, 29.9. 4.10.2008 B-physics with ATLAS and CMS Brigitte Epp, Astro- and Particle Physics, University of Innsbruck, Austria representing ATLAS / CMS collaborations B-physics
More informationMeasurement of Фs, ΔΓs and Lifetime in Bs J/ψ Φ at ATLAS and CMS
Measurement of Фs, ΔΓs and Lifetime in Bs J/ψ Φ at ATLAS and CMS Claudio Heller Excellence Cluster Universe LMU München For the ATLAS and CMS Collaborations Beauty 2013 14th International Conference on
More informationHQL Virginia Tech. Bob Hirosky for the D0 Collaboration. Bob Hirosky, UNIVERSITY of VIRGINIA. 26May, 2016
Bs CP-odd lifetime in Bs J/ψf0 and Afb for baryons at D0 2016 Virginia Tech Bob Hirosky for the D0 Collaboration 1 Tevatron Data D0 continues a rich physics program analyzing ~10fb-1 of recorded data from
More informationHeavy Hadron Production and Spectroscopy at ATLAS
Heavy Hadron Production and Spectroscopy at ALAS Carlo Schiavi on behalf of the ALAS Collaboration INFN Sezione di Genova ALAS has studied heavy flavor production and measured the production cross sections
More informationFirst two sided limit on BR(B s μ + μ - ) Matthew Herndon, University of Wisconsin Madison SUSY M. Herndon, SUSY
First two sided limit on BR(B s μ + μ - ) Matthew Herndon, University of Wisconsin Madison SUSY 2011 M. Herndon, SUSY 2011 1 B s(d) μ + μ - Beyond the SM Indirect searches for new physics Look at processes
More informationNew physics searches via FCNC b s ll decays at ATLAS
New physics searches via FCNC b s ll at ATLAS Marcella (QMUL) on behalf of the ATLAS Collaboration UK Flavour Workshop Durham, UK September 5th, 2017 B physics in ATLAS very limited (wo)man power but a
More informationFirst two sided limit on BR(B s µ + µ - ) Matthew Herndon, University of Wisconsin Madison SUSY M. Herndon, SUSY
First two sided limit on BR(B s µ + µ - ) Matthew Herndon, University of Wisconsin Madison SUSY 2011 M. Herndon, SUSY 2011 1 B s(d) µ + µ - Beyond the SM! Indirect searches for new physics! Look at processes
More informationProduction and Decays of Heavy Flavours in ATLAS
Production and Decays of Heavy Flavours in ATLAS Vincenzo Canale Università di Napoli Federico II and INFN Alessandro Cerri University of Sussex Xth Rencontres du Vietnam - Flavour Physics Conference ICISE,
More informationLatest results on b- physics from the ATLAS and CMS experiments. E. Pasqualucci (INFN Roma) On behalf of the ATLAS and CMS Collaborations
Latest results on b- physics from the ATLAS and CMS experiments E. Pasqualucci (INFN Roma) On behalf of the ATLAS and CMS Collaborations Latest ATLAS and CMS results Rare and semi- rare B 0 (s) decays
More informationThe Compact Muon Solenoid Experiment. Conference Report. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland. Rare B decays at CMS
Available on CMS information server CMS CR -2017/115 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland 17 April 2017 (v4, 10 May 2017) Rare
More informationMeasurement of the. Maren Ugland. Bergen group meeting
Measurement of the B µµ BF s Maren Ugland Bergen group meeting - 25.11.2009 Introduction Neutral B-meson decays to two leptons are very sensitive to new physics. Since B s 0 l + l - involves a flavor changing
More informationRare decays at LHCb Siim Tolk (NIKHEF, Amsterdam) on behalf of the LHCb Collaboration
Rare decays at LHCb Siim Tolk (NIKHEF, Amsterdam) on behalf of the LHCb Collaboration Bormio 2014 Rare decays at LHCb Siim Tolk (NIKHEF, Amsterdam) on behalf of the LHCb Collaboration Other talks from
More informationQuarkonium LHCb
Quarkonium Studies @ LHCb Giacomo Graziani (INFN Firenze) on behalf of the LHCb Collaboration December 5th, 2008 QWG08, Nara G. Graziani slide 1 QWG08 The LHCb Experiment dedicated to CP violation and
More informationB the Tevatron
B Physics @ the Tevatron Stephanie Hansmann-Menzemer Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg DESY, 9 th of November 7 xxx p.1/1 Tevatron p p collisions at s = 1.96 TeV observed by
More informationSpectroscopy and Decay results from CDF
Quarkonium Spectroscopy and Decay results from CDF KIT Quarkonium Workshop December 3, 2008 Outline Tevatron and CDF Bc Mass Lifetime bc X(3872) Mass splitting and mass X page 2 Tevatron p s = 1.96 TeV
More informationB. Hoeneisen. Universidad San Francisco de Quito Representing the DØ Collaboration Flavor Physics and CP violation (2013)
Status report on the like-sign dimuon charge asymmetry in p p collisions and Measurement of the direct CP asymmetry in B J/ψK and B J/ψπ decays B. Hoeneisen Universidad San Francisco de Quito Representing
More informationB physics: new states, rare decays and branching ratios in CDF
B physics: new states, rare decays and branching ratios in CDF Vyacheslav Krutelyov Texas A&M University For CDF Collaboration July 1, 2004 BEACH04 Chicago, IL Outlines CDF Run2 Detector Triggers Searches
More informationMuon commissioning and Exclusive B production at CMS with the first LHC data
Muon commissioning and Exclusive B production at CMS with the first LHC data Silvia Taroni INFN Milano Bicocca On the behalf of the CMS collaboration Outline Introduction CMS detector Muon detection in
More informationPoS(BEAUTY2016)023. Heavy flavour production at CMS. Giulia Negro. CEA/IRFU,Centre d etude de Saclay Gif-sur-Yvette (FR)
CEA/IRFU,Centre d etude de Saclay Gif-sur-Yvette (FR) E-mail: giulia.negro@cern.ch hree recent results in heavy flavour production at the experiment are addressed in this report. Measurements of the differential
More informationLFV in Tau Decays: Results and Prospects at the LHC. Tau th International Workshop on Tau Lepton Physics Beijing September 22th, 2016
LFV in Tau Decays: Results and Prospects at the LHC Kristof De Bruyn On behalf of the ATLAS, CMS & LHCb Collaborations Tau 216 14th International Workshop on Tau Lepton Physics Beijing September 22th,
More informationSearch for Lepton Number Violation at LHCb
Search for Lepton Number Violation at LHCb Update for Majorana Neutrino Search with Like-Sign Di-Muons: B π + μ μ decay P R E L I M I N A R Y, presented for the first time Bartłomiej Rachwał (IFJ PAN Kraków)
More informationRecent Heavy Flavors results from Tevatron. Aleksei Popov (Institute for High Energy Physics, Protvino) on behalf of the CDF and DØ Collaborations
Recent Heavy Flavors results from Tevatron Aleksei Popov (Institute for High Energy Physics, Protvino) on behalf of the CDF and DØ Collaborations March 27, 2017 Outline Tevatron, CDF and DØ Confirmation
More informationHeavy flavor produc.on and spectroscopy at ATLAS. For the ATLAS collabora.on
Heavy flavor produc.on and spectroscopy at ATLAS Brad Abbo8 University of Oklahoma For the ATLAS collabora.on 1 Introduc.on Charmonium/Open Charm Produc2on Measurement of the differen.al cross- sec.ons
More informationRecent CMS results on heavy quarks and hadrons. Alice Bean Univ. of Kansas for the CMS Collaboration
Recent CMS results on heavy quarks and hadrons Alice Bean Univ. of Kansas for the CMS Collaboration July 25, 2013 Outline CMS at the Large Hadron Collider Cross section measurements Search for state decaying
More informationObservation of the rare B 0 s µ + µ decay
Observation of the rare B 0 s µ + µ decay The combined analysis of CMS and LHCb data Luke Pritchett April 22, 2016 Table of Contents Theory and Overview Detectors Event selection Analysis Flavor physics
More informationSearch for very rare decays of beauty mesons into four muons
Search for very rare decays of beauty mesons into four muons Tobias Tekampe on behalf of the LHCb collaboration LHC days, Split, 19th September 216 Introduction Rare B meson decays are suitable processes
More informationRadiative penguins at hadron machines. Kevin Stenson! University of Colorado!
Radiative penguins at hadron machines Kevin Stenson! University of Colorado! Introduction γ + b q u,c,t W s q b q u,c,t W + s q b q ν W W + u,c,t s q!! Radiative penguins involve b to s,d transitions with
More informationarxiv: v1 [hep-ex] 20 Jan 2013
Heavy-Flavor Results from CMS arxiv:.69v [hep-ex] Jan University of Colorado on ehalf of the CMS Collaoration E-mail: keith.ulmer@colorado.edu Heavy-flavor physics offers the opportunity to make indirect
More informationMixing and CP violation
Mixing and CP violation in the B s system with ATLAS Study from B s 0 J/ψ φ decay with and without flavour tagging Toyonobu OKUYAMA University of Tokyo On behalf of the ATLAS Collaboration PASCOS 2013
More informationEarly physics with the LHCb detector
XXVIII PHYSICS IN COLLISION - Perugia, Italy, June, 25-28, 2008 Early physics with the LHCb detector Dirk Wiedner CERN for the LHCb collaboration 27 June 2008 Dirk Wiedner at PIC2008 Perugia 1 Outline
More informationSearching for Confining Hidden Valleys at the LHC(b)
Searching for Confining Hidden Valleys at the LHC(b) Yue Zhao University of Michigan Jan. 2018 with Aaron Pierce, Bibhushan Shakya,Yuhsin Tsai arxiv:1708.05389 [hep-ph] Current Status of Particle Physics
More informationFeasibility of a cross-section measurement for J/ψ->ee with the ATLAS detector
Feasibility of a cross-section measurement for J/ψ->ee with the ATLAS detector ATLAS Geneva physics meeting Andrée Robichaud-Véronneau Outline Motivation Theoretical background for J/ψ hadroproduction
More informationThe LHCb Experiment: First Results and Prospects. Mitesh Patel (Imperial College London) The University of Birmingham, 4 th May 2011
The LHCb Experiment: First Results and Prospects Mitesh Patel (Imperial College London) The University of Birmingham, 4 th May 2011 Outline An extended Higgs sector? (B d µ + µ and B s µ + µ - ) New CP
More informationb and c production in CMS
b and c production in CMS and ATLAS Francesco Fiori on behalf of CMS and ATLAS collaborations VII Meeting on B-physics (LAL) LHC luminosity evolution LHC startup in March 2010 9.67 pb -1 delivered lumi
More informationATLAS Event. IFAE 2011 Incontro di Fisica delle Alte Energie Perugia April Elvira Rossi. Università degli Studi di Napoli Federico II
ATLAS Event sto IFAE 2011 Incontro di Fisica delle Alte Energie Perugia 27-29 April 2011 J/!!"+"- ATLAS Event Elvira Rossi Università degli Studi di Napoli Federico II On behalf of ATLAS Collaboration
More informationFlavour Physics at hadron machines
Flavour Physics at hadron machines KIAS Phenomenology Workshop Seoul, Korea, 17-19 November 2011 T. Nakada EPFL-LPHE Lausanne, Switzerland B physics, started with hadron machine First discovery of b-quark
More informationHeavy Flavor Physics with the ATLAS detector
Heavy Flavor Physics with the ATLAS detector Charilaos Tsarouchas - CERN ATLAS collaboration a t l a s Summer School and Workshop on the Standard Model and Beyond September 8-17, 2012 The ATLAS detector
More informationRecent results from the LHCb
PLANCK 2017 AGH UNIVERSITY OF SCIENCE AND TECHNOLOGY Bartłomiej Rachwał (AGH Kraków) on behalf of LHCb collaboration Recent results from the LHCb 20 th Planck Conference physics beyond the Standard Model
More informationB Hadron lifetimes using a displaced track trigger
B Hadron lifetimes using a displaced track trigger Why B Lifetimes are interesting Overview one analysis Results and prospects Sneha Malde University of Oxford 1 B Hadrons B Mesons B Baryons Name B + B
More informationHeavy Flavour Physics at the LHC. Lessons from the first phase of the LHC DESY 27 September 2012
Heavy Flavour Physics at the LHC University of Warwick and CERN Lessons from the first phase of the LHC DESY 27 September 2012 1 Outline Heavy flavour production at the LHC The LHCb experiment Selected
More informationLHCb status. Marta Calvi. for the LHCb Collaboration. 103 rd LHCC meeting University Milano-Bicocca and INFN
LHCb status 103 rd LHCC meeting 22.09.2010 Marta Calvi University Milano-Bicocca and INFN for the LHCb Collaboration Data taking 3.2 pb -1 on tape eff ~91% Stable data taking, high efficiency in all systems,
More informationSearches for heavy long-lived particles at LHCb
Searches for heavy long-lived particles at LHCb Marcin Chrząszcz mchrzasz@cernch SUSY 2015, Tahoe City, 23-29 August, 2015 1 / Marcin Chrząszcz (Universität Zürich) Searches for heavy long-lived particles
More informationQuarkonium production in CMS
Quarkonium production in CMS Hyunchul Kim (Korea University For the CMS collaboration Content CMS detector@lhc Quarkonia physics motivation Result from CMS Charmonia : J/ψ Bottomonia : ϒ Summary HIM@Pyeongchang,
More informationDetecting new hadrons Excited QCD 2010
Detecting new hadrons Excited QCD 2010 Daniel Scheirich on behalf of ATLAS 2010/02/03 Introduction 2 A bit of history 1974 Richter & Ting discovered J/ψ, the rst hadron containing c-quark. At present day
More informationProspects for quarkonium studies at LHCb. «Quarkonium Production at the LHC» workshop
Prospects for quarkonium studies at LHCb «Quarkonium Production at the LHC» workshop Patrick Robbe, LAL Orsay, 19 Feb 2010 LHCb Detector Forward Spectrometer Geometry, with angular acceptance 15
More informationATLAS studies of spectroscopy and B-decays
ATLAS studies of spectroscopy and B-decays Zdeněk Doležal on behalf of the ATLAS Collaboration Charles University in Prague 53rd International Winter Meeting on Nuclear Physics 26-30 January 2015 Outline
More informationLHCb: first results and prospects for the run
Journal of Physics: Conference Series : first results and prospects for the 1-11 run To cite this article: J P Palacios and the Lhcb Collaboration 1 J. Phys.: Conf. Ser. 9 1 View the article online for
More informationLHCb results in proton-nucleus collisions at the LHC
LHCb results in proton-nucleus collisions at the LHC PANIC August 28, 2014 on behalf of the LHCb collaboration Outline Motivation LHCb Detector Beam configurations Measurements J/Ψ production Υ production
More informationUNIVERSITÀ DEGLI STUDI DI MILANO - BICOCCA DIPARTIMENTO DI FISICA G. OCCHIALINI CORSO DI DOTTORATO IN FISICA E ASTRONOMIA CICLO XXVII
UNIVERSITÀ DEGLI STUDI DI MILANO - BICOCCA DIPARTIMENTO DI FISICA G. OCCHIALINI CORSO DI DOTTORATO IN FISICA E ASTRONOMIA CICLO XXVII Measurement of the branching fraction of B c + J/ψπ + π π + relative
More informationclfv & BNV LHCb Gerco Onderwater on behalf of the LHCb collaboration
clfv & BNV Searches @ LHCb Gerco Onderwater on behalf of the LHCb collaboration Flavour2017, Qui Nhơn, Việt Nam, 13-19 August 2017 2 34 Outline LHCb Experiment LFV with muons : τ LFV with electrons : D0
More informationQuarkonium Physics at CMS
Quarkonium Physics at CMS Daniele Fasanella University & INFN of Bologna on Behalf of the CMS Collabora4on CMS Quarkonium Studies Heavy quarkonia are an excellent laboratory for understanding QCD non-
More informationCharmless b-meson and b-baryon decays at LHCb. Adam Morris
Charmless b-meson and b-baryon decays at Adam Morris University of Edinburgh on behalf of the Collaboration 13 th International Conference on Heavy Quarks and Leptons 6 th May 16 A. Morris (Edinburgh Charmless
More informationMeasurements of the Masses, Mixing, and Lifetimes, of B Hadrons at the Tevatron
Measurements of the Masses, Mixing, and Lifetimes, of B Hadrons at the Tevatron Mike Strauss The University of Oklahoma The Oklahoma Center for High Energy Physics for the CDF and DØ Collaborations Outline
More informationStatus of the LHCb experiment and minimum bias physics
Status of the LHCb experiment and minimum bias physics Sebastian Bachman Heidelberg University on behalf of the LHCb collaboration 6/19/2010 Sebastian Bachmann 1 Beauty and Charm at the LHC LHC is a factory
More informationMultivariate Analysis for Setting the Limit with the ATLAS Detector
Multivariate Analysis for Setting the Limit with the ATLAS B s! µ + µ Detector T. Alexopoulos, E. Gazis, S. Leontsinis - NTU Athens A.Cerri CERN International School of Subnuclear Physics 50 th Course
More informationB PROPERTIES, LIFETIMES, AND B c DECAYS AT LHCb
MIRCO DORIGO (CERN and INFN-TS on behalf of the LHCb collaboration B PROPERTIES, LIFETIMES, AND B c DECAYS AT LHCb BEAUTY 28 - LA BIODOLA, MAY 6 2 28 CONTENTS 2 B properties: focus on Bs lifetime. For
More information(Towards) First Physics with LHCb
(Towards) First Physics with LHCb Beam induced splash in LHCb Physics at LHC 2008 Split, Croatia, 29 Sep - 4 Oct 2008 Introduction Detector overview and performance Extracting physics from (very) first
More information2 The ATLAS Experiment at the Large Hadron Collider at CERN
Studies of the Di-Muons Resonances at the ATLAS Experiment at CERN PhD Detailed Research Project PhD Candidate: Camilla Maiani Supervisor: Prof. Carlo Dionisi, Dott. Stefano Giagu Università di Roma La
More informationPhysics and recent results from LHCb
Physics and recent results from LHCb G. Passaleva On behalf of the LHCb Collabora;on May 31, 2012 KRAKOW, 31 May - 5 June 2012 Outline The LHCb detector Physics at LHCb A Selec;on of results: «Rare decays:
More informationLHCb Semileptonic Asymmetry
CERN E-mail: mika.vesterinen@cern.ch A recent measurement of the CP violating flavour specific asymmetry in B s decays, a s sl, is presented. This measurement is based on a data sample corresponding to
More informationStatus and physics at LHCb
Vienna Seminar, Particle physics and the LHC, 26.11.11 Status and physics at LHCb, Jeroen van Tilburg 1/42 Status and physics at LHCb Vienna Central European Seminar Particle Physics and the LHC Jeroen
More informationResults on charmonium and charmonium-like production from the LHC
XIV International Conference on Hadron Spectroscopy München, 13-17 June 2011 Results on charmonium and charmonium-like production from the LHC Yuanning Gao (Tsinghua University) On behalf of the ALICE,
More informationSearch for B (s,d) μμ in LHCb
Search for B (s,d) μμ in LHCb Diego artinez Santos (CERN) (on behalf of the LHCb Collaboration) CERN-PH-EP-011-09, submitted to PLB http://arxiv.org/abs/1103.465 1 Outline Observables: Branching Ratios
More informationPhysics 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 informationRare Decays at the Tevatron
Rare Decays at the Tevatron Sinéad M. Farrington University of Liverpool for the CDF and D0 Collaborations Beauty 05 21 st June 2005 Outline Overall motivations 0 B d,s µ + µ Motivation CDF and D0 methods
More informationWalter Hopkins. February
B s µ + µ Walter Hopkins Cornell University February 25 2010 Walter Hopkins (Cornell University) Bs µ + µ February 25 2010 1 / 14 Motivation B s µ + µ can only occur through higher order diagrams in Standard
More informationFuture and Prospects for Heavy Flavour Physics at LHC
15 October 2010 Future and Prospects for Heavy Flavour Physics at LHC Pascal Perret LPC Clermont On behalf of the ATLAS, CMS & LHCb Collaboration The present: Content LHC & Detector performances highlight
More informationQuarkonium Results at the LHC
Quarkonium Results at the LHC Giulia Manca Department of Physics, Università di Cagliari, 09042 Monserrato (CA), ITALY on behalf of the ALICE, ATLAS, CMS and LHCb Collaborations 1 Introduction Despite
More informationCP Violation in the B(s) meson system at LHCb Julian Wishahi on behalf of the LHCb collaboration
CP Violation in the B(s) meson system at Julian Wishahi on behalf of the collaboration 5th Rencontres de Moriond, Electroweak Session, 2th of March 215 CPV in Interference of Mixing/Decay interference
More informationLHCb results and prospects
LHCb results and prospects M. Witek (IFJ PAN Cracow, Poland) On behalf of the LHCb Collaboration Miami 2011 Conference Fort Lauderdale, Florida 800 physicists 15 countries 54 institutes CERN LHC Large
More informationEarly flavor physics at the LHC
Early flavor physics at the LHC Walter M. Bonivento sezione di Cagliari on behalf of the ATLAS, CMS and LHCb collaborations Thanks to: M.Smizanska (ATLAS), Urs Langenegger (CMS) and LHCb colleagues The
More informationInclusive 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 informationb and c Spectroscopy at LHCb Giulia Manca (on behalf of the LHCb Collaboration) Universita` degli Studi di Cagliari & I.N.F.N.
b and c Spectroscopy at LHCb Giulia Manca (on behalf of the LHCb Collaboration) Universita` degli Studi di Cagliari & I.N.F.N. Rencontres de Moriond QCD, La Thuile (IT), 9-15 th March 13 Outline The LHCb
More informationSusanna Costanza. (Università degli Studi di Pavia & INFN Pavia) on behalf of the ALICE Collaboration
(Università degli Studi di Pavia & INFN Pavia) on behalf of the ALICE Collaboration 102 Congresso della Società Italiana di Fisica Padova, 26-30 settembre 2016 Outline Heavy flavour physics in ALICE The
More informationExotic spectroscopy and quarkonia at LHCb
Exotic spectroscopy and quarkonia at LHCb Bo Liu 1 on behalf of the LHCb Collaboration Department of Engineering Physics, Tsinghua Unversity, 100084 Beijing, CHINA and Laboratoire de l Accelerateur Lineaire,
More informationExotic hidden-flavour at ATLAS: Search for X b à π + π - ϒ(1S)
Exotic hidden-flavour at ALAS: Search for X b à π + π - ϒ(1S) Cameron Cuthbert for the ALAS collaboration November 1 th 214 1 S Outline 1. Spectroscopy at ALAS he building blocks: ψ and ϒ ψ(2s) reconstruction
More informationLHCb Physics and prospects. Stefano Perazzini On behalf of LHCb Collabora4on MENU nd June 2010
LHCb Physics and 2010-11 prospects Stefano Perazzini On behalf of LHCb Collabora4on MENU2010 2 nd June 2010 Physics: OUTLINE Flavor physics and CPV in the quark sector Search for New Physics The LHCb Experiment
More informationStudy of Bs J/ψη and Bs J/ψη' decays at LHCb
21st International Conference on Supersymmetry and Unification of Fundamental Interactions ICTP Trieste, Italy, 26 31 August 2013 Study of Bs J/ψη and Bs J/ψη' decays at LHCb D. Savrina (ITEP&SINP MSU)
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 informationDetermination of the phase φ s at LHCb
Determination of the phase φ s at LHCb Varvara Batozskaya 1,, on behalf of the LHCb Collaboration 1 National Centre for Nuclear Research (NCBJ), Warsaw, Poland Abstract. The determination of the mixing-induced
More informationRare decays of beauty mesons
Rare decays of beauty mesons on behalf of the LHCb collaboration - The LHCb experiment ECAL, HCAL Particle Id RICH system Muon chambers Interaction point Velo Tracking Tracking stations 2 / 25 B 0 (s)
More informationThe X(3872) at the Tevatron
The X(387) at the Tevatron Ulrich Kerzel, University of Karlsruhe for the CDF and D0 collaborations BEAUTY 005 Physics at the Tevatron observe p p collisions at s =1.96 TeV 1 fb -1 luminosity delivered
More informationFlavour Tagging at LHCb
Flavour Tagging at LHCb Miriam Calvo Gomez, on behalf of the LHCb Collaboration Enginyeria La Salle Universitat Ramon Llull 822 Barcelona, SPAIN miriam.calvo@cern.ch 1 Introduction LHCb is a heavy flavour
More informationQuarkonium results in pp collisions from ALICE
Quarkonium results in pp collisions from ALICE Giuseppe E Bruno Università di Bari and INFN Italy for the ALICE collaboration Outline: introduction measurements in pp at s=7 and 2.76 TeV Integrated and
More informationPoS(DIS2014)183. Charmonium Production at ATLAS. S. Cheatham on behalf of the ATLAS Collaboration. McGill University
on behalf of the ATLAS Collaboration. McGill University E-mail: susan.cheatham@cern.ch Understanding of the production of P-wave charmonium states is a significant bottleneck in the understanding of charmonium
More informationRare decays in the beauty, charm and strange sector
Rare decays in the beauty, charm and strange sector Marcin Chrzaszcz mchrzasz@cern.ch FPCP, Hyderabad 14-18 July 218 1 / M.Chrzaszcz (CERN) Rare decays in the beauty, charm and strange sector 1/26 26 Outline
More informationPDF Studies at LHCb! Simone Bifani. On behalf of the LHCb collaboration. University of Birmingham (UK)
PDF Studies at LHCb! Simone Bifani University of Birmingham (UK) On behalf of the LHCb collaboration MENU 213 Rome 3th September - 4th October 213 Outline Introduction Analyses» Z/γ* ll, l =, e, τ#» W
More informationConference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
CMS CR - he Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH- GENEVA 3, Switzerland 8/5/6 Charmonium production measured in and pp collisions by CMS arxiv:7.5v [nucl-ex]
More informationPANIC August 28, Katharina Müller on behalf of the LHCb collaboration
Measurements with electroweak bosons at LHCb PANIC August 28, 2014 on behalf of the LHCb collaboration Outline LHCb detector Measurements with electroweak bosons Motivation Z production Z plus jets, Z
More informationRare heavy flavor decays at ATLAS & CMS
Rare heavy flavor decays at ATLAS & CMS A. Starodumov a a ETH, 8093 Zurich, Switzerland Two general purpose experiments, ATLAS and CMS, in addition to their main search/discovery program will perform a
More informationRecent results from rare decays
Recent results from rare decays Jeroen van Tilburg (Physikalisches Institut Heidelberg) Don t worry about the number of slides: Only half of them is new Advanced topics in Particle Physics: LHC physics,
More informationProbing Hidden Valley at the LHCb
Probing Hidden Valley at the LHCb Yue Zhao MCTP, University of Michigan UW Madison 2017 with Aaron Pierce, Bibhushan Shakya,Yuhsin Tsai Work in progress Outline: Abelian/Non-abelian dark sector Hidden
More informationHighlights 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 informationResults from B-Physics (LHCb, BELLE)
Prospects for Charged Higgs Uppsala, Sweden, 16-18 September 2014. Results from B-Physics (LHCb, BELLE) Valery Pugatch Kiev Institute for Nuclear Research, NASU On behalf of the LHCb Collaboration 1 OUTLINE
More information