Resolution of Several Puzzles at Intermediate p T and Recent Developments in Correlation Rudolph C. Hwa University of Oregon Quark Matter 05 Budapest,

Slides:

Advertisements

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.

Advertisements

Effects of minijet degradation on hadron observables in heavy-ion collisions Lilin Zhu Sichuan University QPT2013, Chengdu.

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

1 High-p T Physics at RHIC and Evidences of Recombination Rudolph C. Hwa University of Oregon International Symposium on Multiparticle Dynamics Sonoma,

Hadronization of Dense Partonic Matter Rainer Fries University of Minnesota Talk at SQM 2006 March 28, 2006.

Correlation in Jets at RHIC Rudolph C. Hwa University of Oregon Institute of Nuclear Theory University of Washington December 5, 2006.

Ridges and v 2 without hydrodynamics Rudolph C. Hwa University of Oregon Int’nal Symposium on Multiparticle Dynamics Berkeley, August 2007.

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 Physics in Heavy Ion Collisions Rudolph C. Hwa University of Oregon CIAE, Beijing June 13, 2005.

Correlation in Jets Rudolph C. Hwa University of Oregon Workshop on Correlation and Fluctuation in Multiparticle Production Hangzhou, China November 21-24,

Future Measurements to Test Recombination Rudolph C. Hwa University of Oregon Workshop on Future Prospects in QCD at High Energy BNL, July 20, 2006.

Dependence of Ridge Formation on Trigger Azimuth Rudolph C. Hwa University of Oregon Ridge Workshop Brookhaven National Lab September 22, 2008.

Jana Bielcikova (Yale University) for the STAR Collaboration 23 rd Winter Workshop on Nuclear Dynamics February 12-18, 2007 Two-particle correlations with.

Direct-Photon Production in PHENIX Oliver Zaudtke for the Collaboration Winter Workshop on Nuclear Dynamics 2006.

Betty Abelev UI Chicago Testing the Recombination Model at RHIC using multi-strange baryon correlations for the STAR Collaboration 23 rd Winter Workshop.

Jana Bielcikova (Yale University) High-p T physics at LHC, Jyväskylä March 23-27, 2007 Strange particle correlations – coalescence at RHIC and LHC.

Feb 2007 Big Sky, Montana Nuclear Dynamics 2007 Conference Is There A Mach Cone? For the STAR Collaboration Claude Pruneau Motivations/Goals Expectations/Models.

Identified and Inclusive Charged Hadron Spectra from PHENIX Carla M Vale Iowa State University for the PHENIX Collaboration WWND, March

Interaction between jets and dense medium in heavy-ion collisions Rudolph C. Hwa University of Oregon TsingHua University, Beijing, China May 4, 2009.

Alán Dávila for the STAR Collaboration WWND February, 8, 2011.

Uncertainties in jet event generators due to hadronizaton scheme, Other issues with energy loss on E-by-E hydro, and the extraction of transport coefficients.

Enke Wang (Institute of Particle Physics, Huazhong Normal University) with A. Majumder, X.-N. Wang I. Introduction II.Quark Recombination and Parton Fragmentation.

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.

QM’05 Budapest, HungaryHiroshi Masui (Univ. of Tsukuba) 1 Anisotropic Flow in  s NN = 200 GeV Cu+Cu and Au+Au collisions at RHIC - PHENIX Hiroshi Masui.

1 Nov. 15 QM2006 Shanghai J.H. Lee (BNL) Nuclear Induced Particle Suppression at Large-x F at RHIC J.H. Lee Physics Department Brookhaven National Laboratory.

1 Identified Di-hadron Correlation in Au+Au & PYTHIA Simulation Jiaxu Zuo Shanghai Institute of Applied Physics & BNL CCAST Beijing,

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.

Olga Barannikova, UIC Probing the Medium at RHIC by Identified Particles.

U N C L A S S I F I E D 7 Feb 2005 Studies of Hadronic Jets with the Two-Particle Azimuthal Correlations Method Paul Constantin.

Hot Quarks 2004 July 23, 2004, Taos, New Mexico Tatsuya Chujo Hadron Production at Intermediate p T at RHIC Tatsuya Chujo Vanderbilt University for the.

Large p/  Ratio without Jet Correlations at RHIC and LHC Rudolph C. Hwa University of Oregon November 14-20, 2006 Shanghai, China The Omega challenge.

Phantom Jets: the  puzzle and v 2 without hydrodynamics Rudolph C. Hwa University of Oregon Early Time Dynamics in Heavy Ion Collisions Montreal, July.

Ridge Formation and Long Range Correlations in pp Collisions at CMS C.B. Yang Institute of Particle Physics Central China Normal University Wuhan ,

STAR Modification of high-p T hadro-chemistry in Au+Au collisions relative to p+p Anthony Timmins for the STAR Collaboration 31st July 2009 Heavy-ion III.

Correlations at Intermediate p T Rudolph C. Hwa University of Oregon Correlations and Fluctuations in Relativistic Nuclear Collisions MIT, April 2005.

1 Parton Recombination at all p T Rudolph C. Hwa University of Oregon Hard Probes 2004 Ericeira, Portugal, November 2004.

Correlation of Hadrons in Jets Produced at RHIC Rudolph C. Hwa University of Oregon Workshop on QCD and RHIC physics Wuhan, June 22, 2005.

Jet Jet Tomography of Hot & Dense Matter Xin-Nian Wang LBNL, June 25, 2003.

Jeffery T. Mitchell (BNL) – Quark Matter The Evolution of Correlation Functions from Low to High p T : From HBT to Jets Quark Matter 2005 Jeffery.

Recombination in Nuclear Collisions Rudolph C. Hwa University of Oregon Critical Examination of RHIC Paradigms University of Texas at Austin April 14-17,

Near-side  correlations of high-p t hadrons from STAR Jörn Putschke for the STAR collaboration Lawrence Berkeley National Laboratory Weisshorn (4505m),

The Art Poskanzer School 1. 2 Physics motivation To create and study QGP – a state of deconfined, thermalized quarks and gluons predicted by QCD at high.

2008/04/12APS April Meeting 1 Decomposition of Awayside Components of Dijet Correlation in Au+Au Collisions at √S NN = 200 GeV at PHENIX Chin-Hao Chen.

1 Jets in PHENIX Jiangyong Jia, Columbia Univerisity How to measure jet properties using two particle correlation method (In PHENIX)? Discuss formula for.

Kirill Filimonov, ISMD 2002, Alushta 1 Kirill Filimonov Lawrence Berkeley National Laboratory Anisotropy and high p T hadrons in Au+Au collisions at RHIC.

Japanese Physics Society meeting, Hokkaido Univ. 23/Sep/2007, JPS meeting, Sapporo, JapanShinIchi Esumi, Inst. of Physics, Univ. of Tsukuba1 Collective.

Xin-Nian Wang/LBNL QCD and Hadronic Physics Beijing, June 16-20, 2005 Xin-Nian Wang 王新年 Lawrence Berkeley National Laboratory Jet Tomography of Strongly.

Intermediate pT results in STAR Camelia Mironov Kent State University 2004 RHIC & AGS Annual Users' Meeting Workshop on Strangeness and Exotica at RHIC.

Production of strange particles at RHIC via quark recombination C.B. Yang Institute of Particle Physics, Wuhan, China Collaborated with Rudolph C. Hwa.

Jet-medium interaction in heavy-ion collisions Rudolph C. Hwa University of Oregon Hua-Zhong Normal University, Wuhan, China April, 2009.

1 High p T Hadron Correlation Rudolph C. Hwa University of Oregon Hard Probes 2006 Asilomar, CA, June 10, 2006 and No Correlation.

Jana Bielcikova (Yale)ISMD 2007, Berkeley1 Near-side di-hadron correlations at RHIC Jana Bielcikova (Yale University)

Recent developments in RHIC physics Rudolph C. Hwa University of Oregon IHEP seminar June 14, 2005.

The near-side in STAR Christine Nattrass (Yale University) for the STAR Collaboration.

High-pT Identified Hadron Production in Au+Au and Cu+Cu Collisions

Ridges and Jets at RHIC and LHC

Ridges, Jets and Recombination in Heavy-ion Collisions

International CCAST Summer School and Workshop on QCD and RHIC Physics

Fragmentation or Recombination at High pT?

of Hadronization in Nuclei

Identified Charged Hadron

Cronin Effect of  K p from d+Au Collisions at 200 GeV

Shengli Huang Vanderbilt University for the PHENIX Collaboration

Hiroshi Masui for the PHENIX collaboration August 5, 2005

Identified Charged Hadron Production at High pT

Particle Production and Correlation from the Recombination Model

Identified Particle Production at High Transverse Momentum at RHIC

Future Measurements to Test Recombination

QGP Formation Signals and Quark Recombination Model

Presentation transcript:

Resolution of Several Puzzles at Intermediate p T and Recent Developments in Correlation Rudolph C. Hwa University of Oregon Quark Matter 05 Budapest, Hungary, August 2005

2 Work done in collaboration with Chunbin Yang (Hua-Zhong Normal University, Wuhan) Rainer Fries (University of Minnesota) Zhiguang Tan (Hua-Zhong Normal University, Wuhan) Charles Chiu (University of Texas, Austin)

3 Puzzles at intermediate p T 1.Proton/pion ratio 2.Azimuthal anisotropy 3.Cronin effect in pion and proton production 4.Forward-backward asymmetry in dAu collisions 5.Same-side associated particle distribution QM04

4 Puzzle #1 R p/π  1 Not possible in fragmentation model: R p/π u

5 inclusive distribution of pions in any direction soft component thermal-shower recombination usual fragmentation (by means of recombination) Proton formation: uud distribution In the recombination model

6  production in AuAu central collision at 200 GeV Hwa & CB Yang, PRC70, (2004) fragmentation thermal

7 All in recombination/ coalescence model compilation by R.Seto (UCR)

8 Molnar and Voloshin, PRL 91, (2003). Parton coalescence implies that v 2 (p T ) scales with the number of constituents STAR data Puzzle #2 Azimuthal anisotropy

9 Puzzle #3 in pA or dA collisions k T broadening by multiple scattering in the initial state. Unchallenged for ~30 years. If the medium effect is before fragmentation, then  should be independent of h=  or p Cronin Effect Cronin et al, Phys.Rev.D (1975) p q h A STAR, PHENIX (2003) Cronin et al, Phys.Rev.D (1975)  p >  

10 R CP for d-Au collisions because 3q  p, 2q   more partons at 1/3 than at 1/2 Argument does not extend to, nor to higher p T because of ST and SS recombination. Hwa & CB Yang, PRL 93, (04). PRC 70, (04).

11 Puzzle #4 Forward-backward asymmetry in d+Au collisions Expects more forward particles at high p T than backward particles If initial transverse broadening of parton gives hadrons at high p T, then backward has no broadening forward has more transverse broadening B/F < 1

12 Backward-forward ratio at intermed. p T in d+Au collisions (STAR) B/F

13 Hwa, Yang, Fries, PRC 71, (2005) Forward production in d+Au collisions Underlying physics for hadron production is not changed from backward to forward rapidity. BRAHMS data

14 STAR : nucl-ex/ Trigger 4 < p T < 6 GeV/c Puzzle #5: Associated particle pT distribution (near side) factor of 3 difficult for medium modification of fragmentation function to achieve Hwa & Tan, nucl-th/ Recombination model because of T-S recombination

15 PHENIX (preliminary) STAR (preliminary) N. Grau J. Bielcikova RIKEN/BNL Workshop 3/05

16 Correlations 1.Correlation in jets: distributions in  and  2. Two-particle correlation without triggers 3. Autocorrelations 4. Away-side distribution (jet quenching)

17  and  distributions P1P1 P2P2 Pedestal Why? Are these peaks related? How?

18 For STST recombination enhanced thermal trigger associated particle with background subtracted Pedestal peak in  & 

19 Chiu & Hwa, nucl-th/ pedestal  T=15 MeV

20 Chiu & Hwa, nucl-th/

21 Correlation without triggers Correlation function Normalized correlation function

22 Correlation of partons in jets A. Two shower partons in a jet in vacuum Fixed hard parton momentum k (as in e+e- annihilation) k x1x1 x2x2 kinematically constrained dynamically uncorrelated

23 no correlation Hwa & Tan, nucl-th/  0

24 Correlation of pions in jets Two-particle distribution k q3q3 q1q1 q4q4 q2q2 The shower partons are anti-correlated

25 Hwa and Tan, nucl-th/

26

27 Hwa and Tan, nucl-th/

28 Autocorrelation Correlation function 1,2 on equal footing --- no trigger Define Autocorrelation: Fix and, and integrate over all other variables in The only non-trivial contribution to near, would come from jets

29 p2p2 p1p1 x y z  11 22 pion momentum space q2q2 q1q1 x y z  22 11 k parton momentum space -- P(  ) Gaussian in jet cone

30 Chiu and Hwa (05)

31 Away-side  distribution

32 Random walker on a circular mount Most walks are absorbed inside the medium Step size depends on local density Direction of walk is random within a Gaussian peak

33 Sample tracks those that emergethose that are absorbed away-side distribution Chiu & Hwa work in progress

34 Conclusion  Hadronization by recombination resolves several puzzles at intermediate pT.  The pedestal and peak structure in the near-side jets is due to enhanced thermal partons and to jet cone structure of shower partons.  A dip is predicted in the correlation function due to anti-correlation among the shower partons.  Promising start made in the  distribution on the away-side by simulating parton rescattering and absorption.