Energy Dependence of ϕ -meson Production and Elliptic Flow in Au+Au Collisions at STAR Md. Nasim (for the STAR collaboration) NISER, Bhubaneswar, India.

Slides:

Advertisements

Similar presentations

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

Advertisements

Mass, Quark-number, Energy Dependence of v 2 and v 4 in Relativistic Nucleus- Nucleus Collisions Yan Lu University of Science and Technology of China Many.

TJH: ISMD 2005, 8/9-15 Kromeriz, Czech Republic TJH: 1 Experimental Results at RHIC T. Hallman Brookhaven National Laboratory ISMD Kromeriz, Czech Republic.

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, , P.R.China Brookhaven National Lab, Upton,

K*(892) Resonance Production in Au+Au and Cu+Cu Collisions at  s NN = 200 GeV & 62.4 GeV Motivation Analysis and Results Summary 1 Sadhana Dash Institute.

带电粒子多重数在 RHIC 对碰撞能量的依赖裴骅华中师范大学. Outline  STAR Detector  Beam Energy Scan  Nuclear Modification Factors (R CP )  Charged hadron R CP at STAR 

Triangular Flow of Identified Hadrons in Au+Au Collisions at √s NN = 39 & 200 GeV Xu Sun (1,2) for the STAR Collaboration TPC ToFToF 33 1)Harbin Institute.

Peter Christiansen (Lund University) for the ALICE Collaboration.

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

DNP03, Tucson, Oct 29, Kai Schweda Lawrence Berkeley National Laboratory for the STAR collaboration Hadron Yields, Hadrochemistry, and Hadronization.

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,

Source Dynamics from Deuteron and Anti-deuteron Measurements in 200 GeV Au+Au Collisions Hugo E Valle Vanderbilt University (For the PHENIX Collaboration)

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

System size and beam energy dependence of azimuthal anisotropy from PHENIX Michael Issah Vanderbilt University for the PHENIX Collaboration QM2008, Jaipur,

5-12 April 2008 Winter Workshop on Nuclear Dynamics STAR Particle production at RHIC Aneta Iordanova for the STAR collaboration.

K/π and p/π Fluctuations 25 th Winter Workshop on Nuclear Dynamics February 2, 2009 Gary Westfall Michigan State University For the STAR Collaboration.

Supriya Das SQM 2006, 26th March 2006, UCLA 1 Event By Event Fluctuation in K/  ratio atRHIC Supriya Das § VECC, Kolkata (for STAR Collaboration) § Present.

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

ICPAQGP 2010, Goa, India High-Energy Nuclear Collisions and QCD Phase Structure Nu Xu (1) Nuclear Science Division, Lawrence Berkeley National Laboratory,

Rashmi Raniwala Hot & Dense Matter in RHIC-LHC Era, February 12-14, 2008, TIFR, Mumbai 1 Rashmi Raniwala Department of Physics University of Rajasthan.

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.

1 Identified particle production in the Beam Energy Scan from STAR Anthony Timmins for the STAR Collaboration  The Beam energy scan  The STAR experiment.

RESEARCH POSTER PRESENTATION DESIGN © The RHIC Beam Energy Scan (BES) was proposed to search for the possible critical.

Nu Xu1/12 ”DNP“, Newport Beach, California, December , 2012 Energy Dependence of the High Moments from Transport Model Simulations Xiaofeng Luo.

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.

Partonic Collectivity at RHIC ShuSu Shi for the STAR collaboration Lawrence Berkeley National Laboratory Central China Normal University.

Nu Xu1/28 Fluctuations, Correlations and RHIC Low Energy Runs, BNL, October 3 – 5, 2011 STAR Study QCD Phase Structure in STAR Experiment Nu Xu (1) Nuclear.

Matter System Size and Energy Dependence of Strangeness Production Sevil Salur Yale University for the STAR Collaboration.

STAR Strangeness production and Cronin effect in d+Au collisions at √s NN = 200 GeV in STAR For the STAR Collaboration Xianglei Zhu (Tsinghua U / UCLA)

Higher moments of net-charge multiplicity distributions at RHIC energies in STAR Nihar R. Sahoo, VECC, India (for the STAR collaboration) 1 Nihar R. Sahoo,

HuaZhong Normal University IWND09, August 22~25, Shanghai 1 Event-by-Event Fluctuations of Net-Baryon Distribution and Higher Order Cumulants ZHOU You,

SQGP Mini-Workshop (2007. Feb. Nagoya University, T.Chujo Baryon anomaly at RHIC Tatsuya Chujo (University of Tsukuba)

Charged Hadron Nuclear Modification Factors in the Beam Energy Scan data from STAR Stephen Horvat for the STAR collaboration Yale University Stephen HorvatCPOD.

Study of the QCD Phase Structure through High Energy Heavy Ion Collisions Bedanga Mohanty National Institute of Science Education and Research (NISER)

HIGHLIGHTS IN 2011 AT STAR & ALICE In-Kwon Yoo. Outline  STAR BES Results  BES runs and STAR general  Charged Meson   and   Freeze-out Conditions.

M. Oldenburg Strange Quark Matter 2006 — March 26–31, Los Angeles, California 1 Centrality Dependence of Azimuthal Anisotropy of Strange Hadrons in 200.

G. Musulmanbekov, K. Gudima, D.Dryablov, V.Geger, E.Litvinenko, V.Voronyuk, M.Kapishin, A.Zinchenko, V.Vasendina Physics Priorities at NICA/MPD.

1 Jeffery T. Mitchell – Quark Matter /17/12 The RHIC Beam Energy Scan Program: Results from the PHENIX Experiment Jeffery T. Mitchell Brookhaven.

Hadron Collider Physics 2012, 12/Nov/2012, KyotoShinIchi Esumi, Univ. of Tsukuba1 Heavy Ion results from RHIC-BNL ShinIchi Esumi Univ. of Tsukuba Contents.

1 Nuclear modification and elliptic flow measurements for  mesons at  s NN = 200 GeV d+Au and Au+Au collisions by PHENIX Dipali Pal for the PHENIX collaboration.

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.

Robert Pak (BNL) 2012 RHIC & AGS Annual Users' Meeting 0 Energy Ro Robert Pak for PHENIX Collaboration.

Search for QCD Critical Point at RHIC Bedanga Mohanty National Institute of Science Education and Research (NISER) Outline:  Phase diagram of QCD  Observables.

Bulk properties of the system formed in Au+Au collisions at √s NN = 14.5 GeV using the STAR detector at RHIC Vipul Bairathi (for the STAR Collaboration)

Strange Probes of QCD Matter Huan Zhong Huang Department of Physics and Astronomy University of California Los Angeles, CA Oct 6-10, 2008; SQM2008.

Christina Markert Hot Quarks, Sardinia, Mai Christina Markert Kent State University Motivation Resonance in hadronic phase Time R AA and R dAu Elliptic.

2010/04/18Yichun Measurements of identified hadron production at high p T in p+p and Au+Au collisions at RHIC-STAR 许依春 (Yichun Xu)

Jin-Hui Chen Shanghai Institute of Applied Physics, CAS In collaboration with F. Jin, D. Gangadharan, X. Cai, H. Huang and Y. Ma Parton distributions at.

QGP-Meet’06, VECC, Kolkata. 6 th Feb-2006 RAGHUNATH SAHOO, INSTITUTE OF PHYSICS, BHUBANESWAR TRANSVERSE ENERGY PRODUCTION AT RHIC OUTLINE: Introduction.

DIS2007 Munich Germany Shengli Huang 1 Measurements of  meson from hadronic and leptonic decays at RHIC by PHENIX Shengli Huang Vanderbilt University.

Observation of antimatter hypernuclei at RHIC Jinhui Chen Kent State University for the STAR Collaboration 10 th International Conference on Hypernuclear.

Strange hadrons and resonances at LHC energies with the ALICE detector INPC 2013 Firenze, Italy 2 -7 June 2013 A. Badalà (INFN Sezione di Catania) for.

Duke University 野中千穂 Hadron production in heavy ion collision: Fragmentation and recombination in Collaboration with R. J. Fries (Duke), B. Muller (Duke),

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

Tatsuya Chujo for the PHENIX collaboration

Tatsuya Chujo University of Tsukuba (for the PHENIX Collaboration)

Directed Flow Measurements at STAR

The Study of Elliptic Flow for PID Hadron at RHIC-PHENIX

φ-meson production and partonic collectivity at RHIC

Flow Measurement in PHENIX

High-pT Identified Charged Hadrons in √sNN = 200 GeV Au+Au Collisions

Identified Charged Hadron

System Size and Energy Dependence of -meson Production at RHIC

Search for the onset of baryon anomaly at RHIC-PHENIX

Shengli Huang Vanderbilt University for the PHENIX Collaboration

Hiroshi Masui for the PHENIX collaboration August 5, 2005

Identified Charged Hadron Production at High pT

Masahiro Konno (Univ. of Tsukuba) for the PHENIX　Collaboration Contact

Presentation transcript:

Energy Dependence of ϕ -meson Production and Elliptic Flow in Au+Au Collisions at STAR Md. Nasim (for the STAR collaboration) NISER, Bhubaneswar, India Critical Point and Onset of Deconfinement 11 – 15 March 2013, Napa Valley, USA Outline:  Motivation  STAR Experiment  Results  Summary

Motivation 2 LHC Experiments The RHIC Beam Energy Scan (BES)  BES Motivations Search for phase boundary Search for Critical point  Observables of de-confinement a) Strange hadron dynamics N(Ω)/N( ϕ ) and R CP ( ϕ ) b) Strange hadron collectivity Elliptic flow (v 2 ) of ϕ 3/13/13CPOD 2013

Why  -meson ? 3 J. Phys. G 36, (2009), AMPT model In the hadronic case, no number- of-quark scaling and v 2 (  ) << v 2 of hadrons Phys. Rev. C 79, (2009) Phys. Rev. C 87, (2013) 3/13/13CPOD 2013 STAR Collaboration : Nuclear Physics A 757 (2005 )

STAR Experiment 4 ToF BBC PMD EMC Barrel EMC End Cap TPC HLT FTPC √s NN (GeV) Good MB events in Million 7.7~ 4 M 11.5~ 12 M 19.6~ 36 M 27~ 70 M 39~ 130 M 62.4~ 67 M dN evt / (N evt dN ch ) Uncorrected N ch  Collisions: Au+Au  Collisions centrality from uncorrected dN ch /dη in |η| < 0.5 3/13/13CPOD 2013

Particle Identification and v 2 measurement method 5 η-sub event plane method: STAR, Phys. Rev. C 77, (2008) 3/13/13CPOD 2013 Au+Au 39 GeV |η| < 0.9

ϕ -meson p T spectra 6  meson transverse momentum distribution can be well described by a Levy function STAR preliminary 3/13/13CPOD 2013 Statistical error

7  R CP ≥ 1 at intermediate p T for √s NN ≤ 19.6 GeV. → no suppression K 0 S R CP : 0-05%/40-60%  R CP : 0-10%/40-60% and 0-05%/40-60% for 200 GeV 3/13/13CPOD 2013 Nuclear Modification Factor (R CP ) Statistical error

Strange Quark Dynamics 8  Intermediate p T Ω/ ϕ ratios: Indication of separation between ≥ 19.6 and 11.5 GeV.  Derived strange quark p T distributions show a trend of separation between ≥ 19.6 and 11.5 GeV. Change of Ω production mechanism ? Parton recombination fails at 11.5 GeV ? Hwa & Yang, Phys. Rev. C 75, (2007), Phys. Rev. C 78, (2008). STAR preliminary 3/13/13CPOD 2013 STAR preliminary Statistical + Systematic error STAR preliminary

Strange Quark Collectivity 9 Mass: proton ~  At low p T, v 2 (  )/v 2 (p) decreases with decreasing beam energies → Indicating less partonic collectivity with decreasing beam energy. STAR Collaboration: arXiv: and arXiv: , Phys. Rev C 87, (2013 ) STAR preliminary Au+Au, √s NN = 200 GeV At low p T, v 2 (  )/v 2 (p) > 1.0 → strange quark collectivity comparable to light quark. → proton v 2 possibly affected by hadronic re-scattering. 3/13/13CPOD 2013 Statistical error only Au+Au 200 GeV Hydro + cascade Phys. Rev. C 77, (2008)

NCQ scaling: ϕ -meson v 2 10  ϕ meson v 2 deviates from other particles ~ 2σ at the highest p T data in 7.7 and 11.5 GeV collisions. → Small or zero v 2 for ϕ meson implies hadronic interactions are more important at lower energies. More data for 7.7 and 11.5 GeV are needed for clear conclusion. Ref: B. Mohanty and N. Xu: J. Phys. G 36, (2009) and Md. Nasim, B. Mohanty, N. Xu, Phys. Rev C 87, (2013 ) STAR Collaboration: arXiv: and arXiv: ( PRL in press) 3/13/13CPOD 2013 Statistical error only

Summary 11  STAR preliminary ϕ meson spectra and elliptic flow in Au+Au collisions at √s NN = GeV have been presented.  R CP ≥ 1 at intermediate p T for √s NN ≤ 19.6 GeV. → No suppression.  Intermediate p T Ω/ ϕ ratios and derived strange quark p T distribution show a indication of separation between ≥ 19.6 GeV and 11.5 GeV. → Suggests change of production mechanism. Indication of phase transition?  At low p T, v 2 (  )/v 2 (p) decreases with decreasing beam energies. → Indicating less partonic collectivity with decreasing beam energy. Top RHIC Energy (√s NN =200GeV) : At low p T, v 2 (  )/v 2 (p) > 1.0. → Could be the effect of hadronic re-scattering.  ϕ meson v 2 deviates from other particles ~ 2σ at the highest p T data in 7.7 and 11.5 GeV collisions. → It may indicate hadronic interactions are more important at lower energies. 3/13/13CPOD 2013

Back-Up 123/13/13CPOD 2013

133/13/13CPOD 2013 ϕ and proton v 2 v 2 (p)/v 2 ( ϕ ) > 1 ~ mass effect < 1 ~ hadronic re-scattering effect Hydro + cascadeHydro T. Hirano et al. Phys. Rev. C 77, (2008)