Presentation is loading. Please wait.

Presentation is loading. Please wait.

CIPANP '03Jets and high pT hadrons in STAR1 Jets and high p T hadrons: results from STAR Peter Jacobs Lawrence Berkeley National Laboratory STAR Collaboration.

Published byBrendan Horn Modified over 8 years ago

Similar presentations

Presentation on theme: "CIPANP '03Jets and high pT hadrons in STAR1 Jets and high p T hadrons: results from STAR Peter Jacobs Lawrence Berkeley National Laboratory STAR Collaboration."— Presentation transcript:

1 CIPANP '03Jets and high pT hadrons in STAR1 Jets and high p T hadrons: results from STAR Peter Jacobs Lawrence Berkeley National Laboratory STAR Collaboration Au+Au at 200 GeV: inclusive hadron distributions  confrontation with theory two-particle correlations first results from d+Au STAR Other STAR high p T talks: A.Tang: Anisotropic Flow (Session 4, Thurs.) M. Miller: High p T correlations (Session 6, Fri.) J. Klay: High p T spectra (Session 6, Fri.)

2 CIPANP '03Jets and high pT hadrons in STAR2 E-M Calorimeter Time of Flight Projection Chamber STAR

3 CIPANP '03Jets and high pT hadrons in STAR3 Partonic energy loss in dense matter Thick plasma (Baier et al.): Strong dependence of energy loss on gluon density  glue  measure   color charge density at early hot, dense phase Gluon bremsstrahlung Thin plasma (GLV, WW):

4 CIPANP '03Jets and high pT hadrons in STAR4 Jets at RHIC p+p  jet+jet (STAR@RHIC) Au+Au  ??? (STAR@RHIC) nucleon parton jet Find this……….in this

5 CIPANP '03Jets and high pT hadrons in STAR5 Jet energy loss via leading hadrons - Wang and Gyulassy: partonic energy loss  effective softening of fragmentation  suppression of leading hadron yield

6 CIPANP '03Jets and high pT hadrons in STAR6 Au+Au and p+p: inclusive charged hadrons STAR PRL 89, 202301 nucl-ex/0305015 p+p spectrum measured at RHIC

7 CIPANP '03Jets and high pT hadrons in STAR7 Measuring hadron suppression /  inel p+p p+p cross section 1.Au+Au yield relative to binary-scaled nucleon-nucleon cross section: 2.Au+Au central/peripheral yields scaled by Nuclear geometry via Glauber model 

8 CIPANP '03Jets and high pT hadrons in STAR8 Au+Au relative to measured p+p Central collisions: factor ~4-5 suppression nucl-ex/0305015

9 CIPANP '03Jets and high pT hadrons in STAR9 Binary-scaled central/peripheral central collisions: factor ~4-5 suppression p T >5 GeV/c: suppression ~ independent of p T nucl-ex/0305015

10 CIPANP '03Jets and high pT hadrons in STAR10 Central/peripheral: dependence on particle species STAR preliminary 1.5<p T <3.5 GeV/c:  scales ~N binary, K 0 s suppressed p T ~ 6 GeV/c: , K 0 s, charged hadrons scale similarly “baryon enhancement”: partonic flow? modified fragmentation? Cronin effect? …

11 CIPANP '03Jets and high pT hadrons in STAR11 Jets and two-particle correlations p+p  dijet Two-particle azimuthal correlations: select highest p T track  distribution of other tracks (p T >2 GeV/c) in the event normalize to # of triggers …

12 CIPANP '03Jets and high pT hadrons in STAR12 High p T correlations: Au+Au vs p+p PRL 90, 082302 (2003) Central Au + Au Peripheral Au + Au Back-to-back jets are suppressed in central collisions near side away side peripheral central

13 CIPANP '03Jets and high pT hadrons in STAR13 Theory vs. Data pQCD-I: Wang, nucl-th/0305010 pQCD-II: Vitev and Gyulassy, PRL 89, 252301 Saturation: KLM, Phys Lett B561, 93 p T >5 GeV/c: well described by saturation model (up to 60% central) and pQCD+jet quenching nucl-ex/0305015

14 CIPANP '03Jets and high pT hadrons in STAR14 Do we see jet quenching? Independent of particular model calculations: Can we distinguish experimentally between initial and final state effects?  measure partonic energy loss d+Au at 200 GeV: high p T hadrons 2-particle correlations: back-to-back jets observed? inclusive yield relative to p+p: enhancement (pQCD+Cronin) or suppression (saturation)?

15 CIPANP '03Jets and high pT hadrons in STAR15 d+Au centrality tagging ZDCW FTPCE Au d 1. Neutron spectator from deuteron: Observed via single neutron in ZDCW Measured to be 20% of  minbias Glauber w/ Hulthen wavefn: also 20% of  minbias  peripheral events 2. Forward charged particle multiplicity (Au direction): FTPCE: -3.8<  <-2.8

16 CIPANP '03Jets and high pT hadrons in STAR16 d+Au centrality tagging cont’d quantitative study in progress  for now: use FTPCE multiplicity to bias towards central events Cross check: FTPCE multiplicity for ZDCW peripheral events  strong correlation across 8 rapidity units  FTPCE mult sensitive to collision geometry uncorrected FTPCE multiplicity minbias ZDCW peripheral 20% “central”

17 CIPANP '03Jets and high pT hadrons in STAR17 d+Au: two-particle correlations no normalization to underlying event “central”: top 20% FTPCE multiplicity near-side: correlation strength and width similar underlying event grows: p+p  d+Au minbias  d+Au central away-side: d+Au peak broadens but little centrality dependence Back-to-back jets are observed in central d+Au

18 CIPANP '03Jets and high pT hadrons in STAR18 d+Au: minbias charged hadron yield compatible with expectations from Cronin enhancement to do: centrality dependence Charged hadron yield is enhanced in minbias d+Au

19 CIPANP '03Jets and high pT hadrons in STAR19 Summary central Au+Au Binary-scaled inclusive hadron yield: strong suppression central Au+Au modest enhancement in minbias d+Au Back-to-back jets: strong suppression central Au+Au no suppression in minbias and central d+Au

20 CIPANP '03Jets and high pT hadrons in STAR20 Are initial state effects excluded as the dominant mechanisms of strong hadron suppression in heavy ion collisions? If so, have we therefore measured large partonic energy loss in very dense matter?

21 CIPANP '03Jets and high pT hadrons in STAR21 Russia: MEPHI - Moscow LPP/LHE JINR - Dubna IHEP - Protvino U.S. Laboratories: Argonne Berkeley Brookhaven U.S. Universities: Arkansas University UC Berkeley UC Davis UC Los Angeles Carnegie Mellon University Creighton University Indiana University Kent State University Michigan State University City College of New York Ohio State University Penn. State University Purdue University Rice University Texas A&M UT Austin Washington University Wayne State University Yale University Brazil: Universidade de Sao Paulo China: IHEP – Beijing IMP - Lanzou IPP – Wuhan USTC SINR – Shanghai Tsinghua University Great Britain: University of Birmingham France: IReS Strasbourg SUBATECH - Nantes Germany: MPI – Munich University of Frankfurt India: IOP - Bhubaneswar VECC - Calcutta Panjab University University of Rajasthan Jammu University IIT - Bombay VECC – Kolcata Poland: Warsaw University of Tech. The STAR Collaboration

22 CIPANP '03Jets and high pT hadrons in STAR22 Extra slides

23 CIPANP '03Jets and high pT hadrons in STAR23 Theory vs data II Lietava, Pisut, Pisutova and Tomasik, Eur. Phys. J. C28, 119 similar p T dependence also expected from hadronic formation time effects ( Gallmeister, Greiner and Xu, hep-ph/0212295) Jet attenuation in cold matter

Download ppt "CIPANP '03Jets and high pT hadrons in STAR1 Jets and high p T hadrons: results from STAR Peter Jacobs Lawrence Berkeley National Laboratory STAR Collaboration."

Similar presentations

1 Jet Structure of Baryons and Mesons in Nuclear Collisions l Why jets in nuclear collisions? l Initial state l What happens in the nuclear medium? l.

1 Jet Structure of Baryons and Mesons in Nuclear Collisions l Why jets in nuclear collisions? l Initial state l What happens in the nuclear medium? l.
TJH: ISMD 2005, 8/9-15 Kromeriz, Czech Republic TJH: 1 Experimental Results at RHIC T. Hallman Brookhaven National Laboratory ISMD Kromeriz, Czech Republic.

TJH: ISMD 2005, 8/9-15 Kromeriz, Czech Republic TJH: 1 Experimental Results at RHIC T. Hallman Brookhaven National Laboratory ISMD Kromeriz, Czech Republic.
Multiparticle Correlations and Charged Jet Studies in p+p, d+Au, and Au+Au Collisions at  s NN =200 GeV. Michael L. Miller Yale University For the STAR.

Multiparticle Correlations and Charged Jet Studies in p+p, d+Au, and Au+Au Collisions at  s NN =200 GeV. Michael L. Miller Yale University For the STAR.
Pawan Kumar Netrakanti QGP-MEET 2006, VECC, February 2006 1 Identified hadron spectra at large transverse momentum in p + p and d +Au collisions at  s.

Pawan Kumar Netrakanti QGP-MEET 2006, VECC, February Identified hadron spectra at large transverse momentum in p + p and d +Au collisions at  s.
Photon-Hadron Correlations at RHIC Saskia Mioduszewski Texas A&M University E-M Workshop of RHIC/AGS Users’ Meeting 27 May, 2008.

Photon-Hadron Correlations at RHIC Saskia Mioduszewski Texas A&M University E-M Workshop of RHIC/AGS Users’ Meeting 27 May, 2008.
BNL Seminar 10/02 High p t Hadrons in STAR: Past, Present, and Future Michael L. Miller Yale University For the STAR Collaboration.

BNL Seminar 10/02 High p t Hadrons in STAR: Past, Present, and Future Michael L. Miller Yale University For the STAR Collaboration.
References to Study the New Matter. Study QGP in different Centrality Most Central events (highest multiplicity), e.g. top 5% central, i.e. 5% of the.

References to Study the New Matter. Study QGP in different Centrality Most Central events (highest multiplicity), e.g. top 5% central, i.e. 5% of the.
STAR d+Au and final-state suppression in Au+Au1 Evidence from d+Au measurements for final-state suppression of high p T hadrons in Au+Au collisions at.

STAR d+Au and final-state suppression in Au+Au1 Evidence from d+Au measurements for final-state suppression of high p T hadrons in Au+Au collisions at.
STAR Silicon Vertex Tracker Detector (SVT) Update

STAR Silicon Vertex Tracker Detector (SVT) Update
Relativistic Heavy-Ion Collisions: Recent Results from RHIC David Hardtke LBNL.

Relativistic Heavy-Ion Collisions: Recent Results from RHIC David Hardtke LBNL.
Quantum Chromodynamics Quantum Chromodynamics (QCD) is the established theory of strong interactions Gluons hold quarks together to from hadrons Gluons.

Quantum Chromodynamics Quantum Chromodynamics (QCD) is the established theory of strong interactions Gluons hold quarks together to from hadrons Gluons.
High-p T spectra and correlations from Cu+Cu and Au+Au collisions in STAR Marco van Leeuwen, LBNL for the STAR collaboration.

High-p T spectra and correlations from Cu+Cu and Au+Au collisions in STAR Marco van Leeuwen, LBNL for the STAR collaboration.
03/14/2006WWND2006 at La Jolla1 Identified baryon and meson spectra at intermediate and high p T in 200 GeV Au+Au Collisions Outline: Motivation Intermediate.

03/14/2006WWND2006 at La Jolla1 Identified baryon and meson spectra at intermediate and high p T in 200 GeV Au+Au Collisions Outline: Motivation Intermediate.
Dunlop, WW 2006 1 What More Can Be Learned from High Pt Probes at RHIC? James Dunlop Brookhaven National Laboratory.

Dunlop, WW What More Can Be Learned from High Pt Probes at RHIC? James Dunlop Brookhaven National Laboratory.
Hard Probes at RHIC Saskia Mioduszewski Texas A&M University Winter Workshop on Nuclear Dynamics 8 April, 2008.

Hard Probes at RHIC Saskia Mioduszewski Texas A&M University Winter Workshop on Nuclear Dynamics 8 April, 2008.
Jana Bielcikova (Yale University) for the STAR Collaboration 23 rd Winter Workshop on Nuclear Dynamics February 12-18, 2007 Two-particle correlations with.

Jana Bielcikova (Yale University) for the STAR Collaboration 23 rd Winter Workshop on Nuclear Dynamics February 12-18, 2007 Two-particle correlations with.
Gyulassy 1 CIPANP’03 Session 3 (Wednesday May 21, 1:40 - 3:20 pm): Probes of Dense Gluonic Matter (part II) Jet Quenching and Energy Loss - Miklos Gyulassy.

Gyulassy 1 CIPANP’03 Session 3 (Wednesday May 21, 1:40 - 3:20 pm): Probes of Dense Gluonic Matter (part II) Jet Quenching and Energy Loss - Miklos Gyulassy.
Jet Measurements at RHIC M.L. Miller, MIT 1.The laboratory 2.Expectations 3.Measurements 4.Missing pieces 5.Conclusions.

Jet Measurements at RHIC M.L. Miller, MIT 1.The laboratory 2.Expectations 3.Measurements 4.Missing pieces 5.Conclusions.
Identified and Inclusive Charged Hadron Spectra from PHENIX Carla M Vale Iowa State University for the PHENIX Collaboration WWND, March 14 2006.

Identified and Inclusive Charged Hadron Spectra from PHENIX Carla M Vale Iowa State University for the PHENIX Collaboration WWND, March
STAR Back-to-Back Di-Jet Triggered Multi-Hadron Correlations as Medium Probes in STAR Back-to-Back Di-Jet Triggered Multi-Hadron Correlations as Medium.

STAR Back-to-Back Di-Jet Triggered Multi-Hadron Correlations as Medium Probes in STAR Back-to-Back Di-Jet Triggered Multi-Hadron Correlations as Medium.

Similar presentations

Ads by Google