Presentation is loading. Please wait.

Presentation is loading. Please wait.

Identified particle transverse momentum distributions in 200 GeV Au+Au collisions at RHIC 刘海东 中国科技大学.

Published byMadison Davis Modified over 9 years ago

Similar presentations

Presentation on theme: "Identified particle transverse momentum distributions in 200 GeV Au+Au collisions at RHIC 刘海东 中国科技大学."— Presentation transcript:

1 Identified particle transverse momentum distributions in 200 GeV Au+Au collisions at RHIC 刘海东 中国科技大学

2 Haidong Liu (USTC)2 Main contribution Identified charged hadron spectra PRL 97 (2006) 152301 (cited by 61 articles ) nucl-ex 0606003 (cited by 26 articles) Light nuclei spectra and v2 J. Phys. G: Nucl. Part Phys. 34(2007) S1087-s1091 (cited by 3 articles ) International Journal of Modern Physics E ， Vol: 16 Issue: 10 (2007) Page: 3280 - 3285 Anti-baryon phase space density study nucl-ex/0610035 Submitted to PLB

3 Haidong Liu (USTC)3 Outline Motivation Detectors and measurement Results (RHIC run 4 AuAu 200 GeV)

4 Haidong Liu (USTC)4 Heavy-ion collisions at RHIC Time initial state pre-equilibrium (high Q 2 interactions) QGP and hydrodynamic expansion hadronization freeze-out Physics: 1) Parton distributions in nuclei 2) Initial conditions of the collision 3) A new state of matter – Quark-Gluon Plasma and its properties 4) Hadronization and freeze-out

5 Haidong Liu (USTC)5 Particles production Charged hadron (pions and protons) production Low p T – hydrodynamic Intermediate p T – partonic coalescence High p T – jet fragmentation

6 Haidong Liu (USTC)6 pQCD: Color charge and flavor dependence of parton energy loss dE/dx(c/b)<dE/dx(uds)< dE/dx(g) S. Wicks et al., NPA 784(2007)426

7 Haidong Liu (USTC)7 X.N. Wang: PRC58(2321)1998. Study the PID spectra and pbar/p ratios can help to further understand how the g/q jets interact with the medium Parton energy loss in HIJING HIJING calculation

8 Haidong Liu (USTC)8 Different mechanisms govern hadron formation in the different kinematic region Different hadron species may have different sources Those sources (g/q) may have different behavior when propagating the medium To study those behaviors, PID in large p T range is required!

9 Haidong Liu (USTC)9 STAR detectors: TPC & TOFr A new technology (TOF) ---- Multi-gap Resistive Plate Chamber 1.Good timing resolution (<100ps) 2.Two trays (TOFr+TOFp) for run 4, acceptance~0.01, 120 trays (TOFr) in the future Time Projection Chamber 1.Tracking 2.Ionization energy loss (dE/dx)

10 Haidong Liu (USTC)10 PID – Hadrons TPC Relativistic rising of dE/dx High p T High performance of time resolution Low & intermediate p T 2.5<p T <3.0 PID up to 12 GeV/c

11 Haidong Liu (USTC)11 Pion & proton spectra PID up to 12 GeV/c STAR Collaboration PRL 97 (2006) 152301 PAs: H. Liu, O. Barannikova, L. Ruan and Z. Xu

12 Haidong Liu (USTC)12 Nuclear Modification factor In central Au+Au collisions: At 1.5 R CP (  ), R CP (p+pbar) shows obvious decreasing trend. At 4<p T <12 GeV/c, both  and p are strongly suppressed. They approach to each other at about 0.3 Curve: I. Vitev, PLB 639 (2006) 38. pTpT

13 Haidong Liu (USTC)13 Color charge and flavor dependence of parton energy loss High p T Rcp measurements:  , p(pbar), e , ,  0 pTpT Nucl-ex/0607012 PRL 96 (2006) 202301 Rcp(R AA )~0.2 for all these particles!

14 Haidong Liu (USTC)14 Anti-particle to particle ratios 1.  - /  + are consistent with flat at unity in all p T, no significant centrality dependence. 2. pbar/p ratio: no significant centrality dependence, parton energy loss underpredicts the ratios ( X.N. Wang, PRC 58 (2321) 1998).

15 Haidong Liu (USTC)15 Proton over pion ratios 1.The p(pbar)/  ratios in Au+Au collisions show strong centrality dependence. 2.In central Au+Au collisions, the p(pbar)/  ratios reach maximum value at p T ~2-3 GeV/c, approach the corresponding ratios in p+p, d+Au collisions at p T >5 GeV/c. 3.In general, parton energy loss models underpredict p/  ratios. R.J. Fries, et al., Phys. Rev. Lett. 90 202303 (2003); R. C. Hwa, et al., Phys. Rev. C 70, 024905 (2004); DELPHI Collaboration, Eur. Phy. J. C 5, 585 (1998), Eur. Phy. J. C 17, 207 (2000).

16 Haidong Liu (USTC)16 B/M enhancement at intermediate p T 1) The relative baryon enhancement is clearly observed in the p/pi ratios at intermediate p T, the similar behavior can also be seen in the  /K s 0 ratios. At the same p T region, the NQ scaling of v 2 has also been observed. This can be explained by the parton coalescence phenomena. 2) In general, parton energy loss models underpredict p/  ratios. R.J. Fries, et al., Phys. Rev. Lett. 90 202303 (2003); R. C. Hwa, et al., Phys. Rev. C 70, 024905 (2004); DELPHI Collaboration, Eur. Phy. J. C 5, 585 (1998), Eur. Phy. J. C 17, 207 (2000). STAR Nucl-ex/0601042

17 Haidong Liu (USTC)17 Summary First time to extend PID pt range up to 12 GeV/c for charged pion, kaon and (anti- )proton First time to observe the similar suppressions for high pt mesons and baryons, which challenges the standard parton energy loss model Further test the coalescence model in the intermediate pt range

18 Haidong Liu (USTC)18

Download ppt "Identified particle transverse momentum distributions in 200 GeV Au+Au collisions at RHIC 刘海东 中国科技大学."

Similar presentations

PID v2 and v4 from Au+Au Collisions at √sNN = 200 GeV at RHIC

PID v2 and v4 from Au+Au Collisions at √sNN = 200 GeV at RHIC
Pawan Kumar NetrakantiPANIC-2005, Santa Fe1 Pion, proton and anti-proton transverse momentum spectra in p+p and d+Au collisions at  s NN = 200 GeV Outline:

Pawan Kumar NetrakantiPANIC-2005, Santa Fe1 Pion, proton and anti-proton transverse momentum spectra in p+p and d+Au collisions at  s NN = 200 GeV Outline:
Anisotropic Flow at RHIC Jiayun Chen (for Collaboration) Institute of Particle Physics, HZNU, Wuhan, 430079, P.R.China Brookhaven National Lab, Upton,

Anisotropic Flow at RHIC Jiayun Chen (for Collaboration) Institute of Particle Physics, HZNU, Wuhan, , P.R.China Brookhaven National Lab, Upton,
Quark Matter 2006 (2006.11.18) Excitation functions of baryon anomaly and freeze-out properties at RHIC-PHENIX Tatsuya Chujo (University of Tsukuba) for.

Quark Matter 2006 ( ) Excitation functions of baryon anomaly and freeze-out properties at RHIC-PHENIX Tatsuya Chujo (University of Tsukuba) for.
Production of meson, baryon and light nuclei in Au+Au collisions at RHIC Haidong Liu Univ. of Science & Technology of China.

Production of meson, baryon and light nuclei in Au+Au collisions at RHIC Haidong Liu Univ. of Science & Technology of China.
Particle Production in p + p Reactions at GeV K. Hagel Cyclotron Institute Texas A & M University for the BRAHMS Collaboration.

Particle Production in p + p Reactions at GeV K. Hagel Cyclotron Institute Texas A & M University for the BRAHMS 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.
We distinguish two hadronization mechanisms:  Fragmentation Fragmentation builds on the idea of a single quark in the vacuum, it doesn’t consider many.

We distinguish two hadronization mechanisms:  Fragmentation Fragmentation builds on the idea of a single quark in the vacuum, it doesn’t consider many.
Bedanga Mohanty 23rd Winter workshop on nuclear dynamics 1 Color charge dependence of energy loss at RHIC  Introduction What are color factors in QCD.

Bedanga Mohanty 23rd Winter workshop on nuclear dynamics 1 Color charge dependence of energy loss at RHIC  Introduction What are color factors in QCD.
STAR Patricia Fachini QM20081 ρ 0 Production at High p T in Central Au+Au and p+p collisions at  s NN = 200 GeV in STAR STAR Patricia Fachini Brookhaven.

STAR Patricia Fachini QM20081 ρ 0 Production at High p T in Central Au+Au and p+p collisions at  s NN = 200 GeV in STAR STAR Patricia Fachini Brookhaven.
1 相对论重离子碰撞中  介子的产生 陈金辉 中国科学院上海应用物理研究所 QCD 相变与重离子碰撞物理国际暨 2008 年 7 月 10 号 -12 号 Many thanks to: X. Cai, S. Blyth, F. Jin, H. Huang, G. Ma,

1 相对论重离子碰撞中  介子的产生 陈金辉 中国科学院上海应用物理研究所 QCD 相变与重离子碰撞物理国际暨 2008 年 7 月 10 号 -12 号 Many thanks to: X. Cai, S. Blyth, F. Jin, H. Huang, G. Ma,
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.
5-12 April 2008 Winter Workshop on Nuclear Dynamics STAR Particle production at RHIC Aneta Iordanova for the STAR collaboration.

5-12 April 2008 Winter Workshop on Nuclear Dynamics STAR Particle production at RHIC Aneta Iordanova for the STAR collaboration.
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
12-17 February 2007 Winter Workshop on Nuclear Dynamics STAR identified particle measurements at large transverse momenta in Cu+Cu collisions at RHIC Richard.

12-17 February 2007 Winter Workshop on Nuclear Dynamics STAR identified particle measurements at large transverse momenta in Cu+Cu collisions at RHIC Richard.
SQM2006, 03/27/2006Haibin Zhang1 Heavy Flavor Measurements at STAR Haibin Zhang Brookhaven National Laboratory for the STAR Collaboration.

SQM2006, 03/27/2006Haibin Zhang1 Heavy Flavor Measurements at STAR Haibin Zhang Brookhaven National Laboratory for the STAR Collaboration.
Tatsuya Chujo (BNL) for the PHENIX Collaboration

Tatsuya Chujo (BNL) for the PHENIX Collaboration
Identified Particle Ratios at large p T in Au+Au collisions at  s NN = 200 GeV Matthew A. C. Lamont for the STAR Collaboration - Talk Outline - Physics.

Identified Particle Ratios at large p T in Au+Au collisions at  s NN = 200 GeV Matthew A. C. Lamont for the STAR Collaboration - Talk Outline - Physics.
QM2006 Shanghai, China 1 High-p T Identified Hadron Production in Au+Au and Cu+Cu Collisions at RHIC-PHENIX Masahiro Konno (Univ. of Tsukuba) for the PHENIX.

QM2006 Shanghai, China 1 High-p T Identified Hadron Production in Au+Au and Cu+Cu Collisions at RHIC-PHENIX Masahiro Konno (Univ. of Tsukuba) for the PHENIX.
Anomaly of over ratios in Au+Au collision with jet quenching Xiaofang Chen IOPP, CCNU Collaborator: Enke Wang Hanzhong Zhang Benwei Zhang Beijing Mar.

Anomaly of over ratios in Au+Au collision with jet quenching Xiaofang Chen IOPP, CCNU Collaborator: Enke Wang Hanzhong Zhang Benwei Zhang Beijing Mar.

Similar presentations

Ads by Google