1 The CMS Heavy Ion Program Michael Murray Kansas.

Slides:

Advertisements

Similar presentations

Open beauty production in pp collisions at 7 TeV with CMS Kajari Mazumdar Tata Institute of Fundamental Research Mumbai, India. on behalf of CMS Collaboration,

Advertisements

Overview of Heavy-Ion Physics Program in CMS

CMS Heavy Ion Physics Edwin Norbeck University of Iowa.

IPM, 1 st meeting on LHC Physics, Isphagan,Iran 20 April-24 April 2009 Heavy Ion Physics with the CMS detector Olga Kodolova, INP MSU for Collaboration.

LHC/HERA workshop, WG 4 (17. Jan. 2005)

The Heavy-Ion Physics Programme with the ATLAS Detector & new results from WA98 Laurent Rosselet Cartigny, September 14 th 2007.

Jet and Jet Shapes in CMS

Heavy Ion Measurements with the ATLAS Detector at the LHC Brian A. Cole, Columbia University June 28, 2007.

Winter Workshop on Nuclear Dynamics, Heavy Ion Physics with CMS: Day-One Measurements Olga Barannikova for the CMS Collaboration.

1D. Dutta, BARC CMS Ann HI Meet 20 th June 2008 Z 0 studies in CMS:Status &Workplan Dipanwita Dutta NPD, BARC, Mumbai.

March 13, 2006CMS Heavy Ions Bolek Wyslouch1 Bolek Wyslouch Massachusetts Institute of Technology for the CMS Collaboration 22 nd Winter Workshop on Nuclear.

The US ATLAS Heavy Ion Program Brian A. Cole, Columbia University January 12, 2007 Phases of QCD Matter Town Meeting.

Daniele Benedetti CMS and University of Perugia Chicago 07/02/2004 High Level Trigger for the ttH channel in fully hadronic decay at LHC with the CMS detector.

Phases of QCD Matter Town Meeting, Rutgers, Jan Dave Hofman1 Heavy Ion Physics with CMS Dave Hofman UIC for the CMS Collaboration CMS Heavy-Ion.

High-density QCD with CMS at the LHC Haidong Liu for the CMS Collaboration OutLine Detectors Overview Bulk Observables Hard Probes Summary.

Richard Hollis University of Illinois at Chicago Heavy-Ions in CMS 24 th Winter Workshop on Nuclear Dynamics.

Gábor Veres Strangeness in Quark Matter ‘06, UCLA, March 26, Heavy Ion Physics with the CMS Experiment at the LHC Gábor Veres Eötvös Loránd University,

ALICE EMCal Physics and Functional Requirements Overview.

The Physics Potential of the PHENIX VTX and FVTX Detectors Eric J. Mannel WWND 13-Apr-2012.

Sourav Tarafdar Banaras Hindu University For the PHENIX Collaboration Hard Probes 2012 Measurement of electrons from Heavy Quarks at PHENIX.

The forward detectors of CMS Experiment at LHC Bolek Wyslouch MIT

Byungsik Hong (Korea University) for the Collaboration Strangeness in Quark Matter 2008 Tsinghua Univ., Beijing, China Exploring High-Density QCD Matter.

Experimental Research on School of Physics, Peking University at the CMS Bo ZHU  Motivation  Results of MC  Conclusion.

1 PbPb collisions in CMS Bolek Wyslouch École Polytechnique Massachusetts Institute of Technology Massachusetts Institute of Technology on behalf of CMS.

1 Perspectives for quarkonium production in CMS Carlos Lourenço, on behalf of CMSQWG 2008, Nara, Japan, December 2008.

Pavel Nevski ATLAS detector performance in Heavy Ion Collisions at LHC ATLAS detector performance in Heavy Ion Collisions at LHC Pavel Nevski BNL Motivations.

Mock Data Challenge PbPb collisions - July 2010 Prashant Shukla Nuclear Physics Division BARC, Mumbai India 1 India CMS, July 2010, BARC, Mumbai.

 production in p+p and Au+Au collisions in STAR Debasish Das UC Davis (For the STAR Collaboration)‏

Chester - Sept Russell Betts 1 Muon System.

Heavy flavor production at RHIC Yonsei Univ. Y. Kwon.

25 sep Reconstruction and Identification of Hadronic Decays of Taus using the CMS Detector Michele Pioppi – CERN On behalf.

Observables in heavy-ion collisions at CMS Haidong Liu

Heavy Ion Physics with CMS Russell Betts - UIC. Studying QCD with Heavy Ions Quark Gluon Plasma: –QCD at High T, High Density –Phase Diagram of QCD Strongly-Interacting.

Charged Particle Multiplicity and Transverse Energy in √s nn = 130 GeV Au+Au Collisions Klaus Reygers University of Münster, Germany for the PHENIX Collaboration.

Pablo Yepes, Rice U 0 HI May 19, 2001May 19, CMS Heavy Ion Physics Pablo Yepes Rice University oHadronic Collisions sQuarkonia Production sJet Collisions.

CMS 2008:2014 Michael Murray Kansas, Athens,Basel, CERN, Demokritos, Dubna, Ioannina, Kent State, Kiev, Lyon, MIT, Moscow, N. Zealand, Protvino, PSI, Rice,

LHC Heavy-Ion Program a CMS Perspective Edwin Norbeck University of Iowa for the CMS Collaboration 20 th Winter Workshop on Nuclear Dynamics CMS HI groups:

Heavy Ion Physics with the ATLAS detector Helio Takai Brookhaven National Laboratory IV INTERNATIONAL SYMPOSIUM ON LHC PHYSICS AND DETECTORS.

ATLAS Heavy Ion Physics Andrzej Olszewski (INP PAN Kraków) for the ATLAS Collaboration.

Recent Open Heavy Flavor Results from ATLAS and CMS Experiment at LHC

Helio Takai Brookhaven National Laboratory (for the ATLAS collaboration) Quarkmatter 2004 Oakland, January 11-17,2004 ATLAS at LHC.

First measurements in Pb—Pb collisions at  s NN =2.76 TeV with ALICE at the LHC M. Nicassio (University and INFN Bari) for the ALICE Collaboration Rencontres.

1 Carlos Lourenço, CERN CERN, August, 2008 SPS RHIC LHC From High-Energy Heavy-Ion Collisions to Quark Matter Episode III : Back to the future From the.

Gábor I. Veres MB&UE WG, 31 May, CMS Minimum Bias and Diffraction Measurements Gábor I. Veres (CERN) Minimum Bias and Underlying Event Working.

D.Arkhipkin, Y. Zoulkarneeva, Workshop of European Research Group on Ultra relativistic Heavy Ion Physics March 9 th 2006 Transverse momentum and centrality.

January 15, 2004CMS Heavy Ions Bolek Wyslouch1 Bolek Wyslouch MIT for the CMS Collaboration Quark Matter 2004, Oakland, CA CMS HI groups: Athens, Auckland,

Russell Betts Quark Matter Heavy Ion Physics with CMS Russell Betts for the CMS Collaboration Heavy Ion Physics Institutions Athens, Auckland, Budapest,

Outline  Charm and Beauty at the LHC  Heavy-flavour program in ALICE  Measurements in preparation  Examples of expected performance  Conclusions Heavy.

1 First results from PbPb collisions at CMS Prashant Shukla Nuclear Physics Division BARC, Mumbai India CMS collaboration India-CMS Meeting, 17 January,

July 27, 2002CMS Heavy Ions Bolek Wyslouch1 Heavy Ion Physics with the CMS Experiment at the Large Hadron Collider Bolek Wyslouch MIT for the CMS Collaboration.

Yen-Jie Lee (CERN) 1 MBUE working group 2012 Yen-Jie Lee (CERN) for the CMS Collaboration MBUE working group CERN 3 rd Dec, 2012 Two-particle correlations.

BNL, Jan 7-9, 2013 Wei Li First two-particle correlation results in proton-lead collisions from CMS Wei Li (Rice University) for the CMS collaboration.

SPHENIX Mid-rapidity extensions: Additional Tracking system and pre-shower Y. Akiba (RIKEN/RBRC) sPHENIX workfest July 29,

V. Pozdnyakov Direct photon and photon-jet measurement capability of the ATLAS experiment at the LHC Valery Pozdnyakov (JINR, Dubna) on behalf of the HI.

 reconstruction and identification in CMS A.Nikitenko, Imperial College. LHC Days in Split 1.

PHENIX J/  Measurements at  s = 200A GeV Wei Xie UC. RiverSide For PHENIX Collaboration.

Charged particle yields and spectra in p+p and Heavy Ion Collisions with ATLAS at the LHC Jiří Dolejší (Charles University Prague) for the ATLAS collaboration.

Ultra-peripheral heavy ion results from CMS Michael Murray, DIS2015, 29 th April 2015 CMS: HIN :

Zvi Citron Correlations Between Neutral Bosons and Jets in Pb+Pb Collisions at 2.76 TeV with the ATLAS Detector Zvi Citron for the ATLAS Collaboration.

Preparation for the first p+p physics with the CMS experiment and the plans of the CMS Heavy Ion Group Gábor I. Veres Eötvös Loránd University, Budapest.

Review of ALICE Experiments

“It is better to begin in the evening than not at all”

Heavy Ion Physics with the ATLAS Detector

Highlights of Heavy Ion Physics with ATLAS

Measurement of the γ,W,Z with ATLAS for the ATLAS Collaboration

STAR Geometry and Detectors

First physics from the ALICE electromagnetic calorimeters

Overview of CMS HI Results - Summary of QM 2011 Presentations -

Presentation transcript:

1 The CMS Heavy Ion Program Michael Murray Kansas

2 CMS is a running experiment

3 Overview The detector Soft Physics  Multiplicity  ,k,p at low pt  Flow Hard Physics  Jets  Photons  Quarkonia  Photon nucleus Z Jet Event

4 Rapidity Range A new telescope for new probes High Rate, Trigger Y=4

5 LHC RHIC SPS Hard probes are rare

6 The Central Detector Pixels Strips EM Cal HCal Coil Muons Iron

7 A transverse slice through CMS

8 HCAL ECAL Tracker Coil A slice along Z

9 Castor 5.2<  <6.6 ZDC  >8.3 Forward Detectors

10 HIJING default settings Pixels hits count Multiplicity/event Pseudo rapidity Find hits in pixels, using an energy cut. We also have a tracklet analysis.

11 |  |<1 Low p T hadrons Find tracks in pixels and use energy loss vs momentum for particle ID p T (GeV/c)  pT pT Efficiency dN dp T

12 1. Find the reaction plane calorimeters and tracker 2. Use 2, 4 particle correlations or Lee Yang Zeros Ecal  0.37 V2 with tracker Elliptic Flow Reaction plane x z y  rad p T (GeV/c) V2V2 d  dE

13 Triggering L /cm 2 /s Bunch cross Interaction rate Level 1Event size HLT rate offline pp ns40MHz1/4001MB100 KHz 150Hz PbPb ns8KHz1/ MB 8 Khz Hz Trigger increases p T range by > 2 for many probes

14 dN ch /d  = 5000 Iterative cone (R>=0.5) with background subtraction:  calculate average energy and dispersion in tower (in eta rings) for each event  subtract average energy and dispersion from each tower  find jets with a jet finder algorithm (any) using the new tower energies  recalculate average energy and dispersion using towers free of jets  recalculate jet energies Done, but can do more iterations Space resolution is less then the tower size Finding Jets MC Jet E T (GeV) Rec E T

Efficiency ~ 70 %, fake rate ~ 1% p T (GeV/c)  <0.5 Single strips Double strips Pixels Z (m) Y (m) Efficiency % Fakes %   pT  %   z  cm 2.0<  <2.5  <0.5 Pointing useful for heavy quarks p T (GeV/c) Tracking

16 jet trigger data High Pt Assume luminosity = 0.5 nb -1 10% Central Energy loss from HYDJET No trigger R AA p T (GeV/c) Charged particles |  |<2.5 p T (GeV/c)

17 Efficiency = 60% Fake = 3.5% S/B=4.5 Photons Photon ID based only on cluster shape and isolation cuts using a multi-variate analysis. We reconstruct photon energy with Island algorithm

18 I =0..5 nb -1 Jet fragmention from  jet events Require photon E T > 70GeV

19 cc Suppression: RHIC similar to SPS Regeneration compensate screening J/  not screened at RHIC (T D ~2Tc) LHC: recombination or suppression Suppression of B’onium states  Large Cross-section: 20 x RHIC  melts only at LHC: T D ~4 T C Fewer of bb pairs: less regeneration Much cleaner probe than J/  '' J/  Quarkonia Branching ration is 5.9% for J/ , 2.5%Y (BR:2.5%) Background is from decays from  /K, b-,c-mesons Suppression of charmonion

20 J/    +  - dN ch /d  = 5000 dN ch /d  = 2500 For 0.5 nb -1 we reconstruct 180K J/  Signal/Background: ~5 for |  |<0.8, 1 for |  |<2.4  = 35 MeV |  |<2.4 Produced Reconstructed 2500 Reconstructed 5000 p T (GeV/c) M  (GeV)

21 |  |<2.4,  = 90MeV mass resolution, 90 MeV |  |<2.4 Y ~ , Y' ~ 7 000, Y'' ~ Signal/Background: 1 |  |<0.8, 0.1 for |  |<2.4) Y   +  - M  (GeV) Produced Reconstructed 2500 Reconstructed 5000 p T (GeV/c)

22 Photon nucleus Max photon energy ~ 80 GeV  Pb:  S ≈ 1. TeV/n   S ≈ 160 GeV M  (GeV) M ee (GeV)

23 Summary CMS has an excellent opportunity to study partonic matter at both soft and hard scales, via Multiplicity Soft spectra Flow Forward Physics Quarkonia Hard spectra Photons Jets Z

24 Backup slides

25 CMS acceptance ECAL, PbWO x Inner detector HCAL (sampling) 0.087x0.087 (HB) >0.17 (HE) HF Muon Spectrometer Cast or CMS: Inner detector (|  |<2.5) ECAL (|  |<3) HCAL (|  |<3) HF (3<|  |<5) Muon (|  |<2.4) Castor (5<|  |<6.7) ZDC (|  |>8)