1 Azimuthal quadrupole correlation from gluon interference in 200 GeV and 7 TeV p+p collisions Lanny Ray – University of Texas at Austin The 2 nd International.

Slides:

Advertisements

Similar presentations

Eccentricity and v2 in proton-proton collisions at the LHC

Advertisements

Yoshitaka Hatta (U. Tsukuba) Eccentricity and v2 in proton-proton collisions at the LHC in collaboration with E. Avsar, C. Flensburg, J.-Y. Ollitrault,

What do we Learn From Azimuthal Correlation Measurements in PHENIX Roy. A. Lacey Nuclear Chemistry, SUNY, Stony Brook.

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.

Minimum bias and the underlying event: towards the LHC I.Dawson, C.Buttar and A.Moraes University of Sheffield Physics at LHC - Prague July , 2003.

Measurements of long-range angular correlation and identified particle v 2 in 200 GeV d+Au collisions from PHENIX Shengli Huang Vanderbilt University for.

Universal Centrality and Collision Energy Trends for v 2 Measurements From 2D Angular Correlations Dave Kettler for the STAR Collaboration Hot Quarks Estes.

Julia Velkovska Selected CMS Results from pp collisions 27th Winter Workshop on Nuclear Dynamics Winter Park, Colorado Feb 6-13, 2011.

Julia VelkovskaMoriond QCD, March 27, 2015 Geometry and Collective Behavior in Small Systems from PHENIX Julia Velkovska for the PHENIX Collaboration Moriond.

R. Lacey, SUNY Stony Brook PHENIX Measurements of Anisotropic Flow in Heavy-Ion Collisions at RHIC Energies 1 Nuclear Chemistry Group, SUNY Stony Brook,

ICPAQGP, Kolkata, February 2-6, 2015 Itzhak Tserruya PHENIX highlights.

Based on work with: Sean Gavin & Larry McLerran arXiv: [nucl-th] Long Range Correlations and The Soft Ridge George Moschelli 25th Winter Workshop.

Terence Tarnowsky Long-Range Multiplicity Correlations in Au+Au at Terence J Tarnowsky Purdue University for the STAR Collaboration 22nd Winter Workshop.

Soft Contribution to the Hard Ridge George Moschelli Wayne State University 26,WWND, January 2-10, 2009 Ocho Rios, Jamaica The Ridge Hard Ridge: jet trigger.

DPG spring meeting, Tübingen, March Kai Schweda Lawrence Berkeley National Laboratory for the STAR collaboration Recent results from STAR at RHIC.

Hadronic Resonances in Heavy-Ion Collisions at ALICE A.G. Knospe for the ALICE Collaboration The University of Texas at Austin 25 July 2013.

Cold nuclear matter effects on dilepton and photon production Zhong-Bo Kang Los Alamos National Laboratory Thermal Radiation Workshop RBRC, Brookhaven.

CDF Joint Physics Group June 27, 2003 Rick FieldPage 1 PYTHIA Tune A versus Run 2 Data  Compare PYTHIA Tune A with Run 2 data on the “underlying event”.

Forward - Backward Multiplicity in High Energy Collisions Speaker: Lai Weichang National University of Singapore.

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.

Two Particle Correlations and Viscosity in Heavy Ion Collisions Monika Sharma for the Wayne State University STAR Collaboration Outline: Motivation Measurement.

As one evolves the gluon density, the density of gluons becomes large: Gluons are described by a stochastic ensemble of classical fields, and JKMMW argue.

The long-range pseudo-rapidity correlations in high-energy collisions 王福强 Purdue University.

SQM2004, Cape Town, Sept. 16, 2004 STAR 1 Cronin Effect for the identified particles from 200 GeV d+Au collisions Xiangzhou Cai Shanghai INstitute of Applied.

Cambridge Workshop July 18, 2002 Rick Field - Florida/CDFPage 1 The Sources of b-Quarks at the Tevatron  Important to have good leading (or leading-log)

Detail study of the medium created in Au+Au collisions with high p T probes by the PHENIX experiment at RHIC Takao Sakaguchi Brookhaven National Laboratory.

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

09/15/10Waye State University1 Elliptic Flow of Inclusive Photon Ahmed M. Hamed Midwest Critical Mass University of Toledo, Ohio October, 2005 Wayne.

The centrality dependence of high p T π 0 production in d-Au collisions Abstract Michael Kordell II, Abhijit Majumder Wayne State University, Detroit,

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

Energy Scan of Hadron (  0 ) Suppression and Flow in Au+Au Collisions at PHENIX Norbert Novitzky for PHENIX collaboration University of Jyväskylä, Finland.

Jan. 13, 2004QM 2004 Poster Session1 The Geometry of Hadronization in Au-Au Collisions at s NN 1/2 = 130 and 200 GeV Studied with Two-Particle, Charge-Dependent.

Forward-backward multiplicity correlations in PbPb, pPb and pp collisions from ATLAS Jiangyong Jia for the ATLAS collaboration 9/27-10/3, 2015

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

Seminários GFPAE – 02/ Diffractive heavy quark production at the LHC Mairon Melo Machado

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.

Francesco Noferini Bologna University Erice, Italy 31 st August 2006 Two-particle correlations: from RHIC to 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.

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

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

The Underlying Event in Jet Physics at TeV Colliders Arthur M. Moraes University of Glasgow PPE – ATLAS IOP HEPP Conference - Dublin, 21 st – 23 rd March.

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.

1 Charged hadron production at large transverse momentum in d+Au and Au+Au collisions at  s=200 GeV Abstract. The suppression of hadron yields with high.

PHENIX results on centrality dependence of yields and correlations in d+Au collisions at √s NN =200GeV Takao Sakaguchi Brookhaven National Laboratory for.

1 Diffractive heavy quark production in AA collisions at the LHC at NLO* Mairon Melo Machado GFPAE – IF – UFRGS

Implications for LHC pA Run from RHIC Results CGC Glasma Initial Singularity Thermalized sQGP Hadron Gas sQGP Asymptotic.

Hadronic resonance production in Pb+Pb collisions from the ALICE experiment Anders Knospe on behalf of the ALICE Collaboration The University of Texas.

1 The transition observed in two- dimensional correlation data from STAR Lanny Ray University of Texas at Austin STAR Collaboration Outline:  p-p phenomenology.

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.

Inclusive cross section and single transverse-spin asymmetry of very forward neutron production at PHENIX Spin2012 in Dubna September 17 th, 2012 Yuji.

Azimuthal correlations of forward di-hadrons in d+Au collisions at RHIC Cyrille Marquet Theory Division - CERN Based on :C.M., Nucl. Phys. A796 (2007)

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

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.

Peter SteinbergISMD2003 Experimental Status of Parton Saturation at RHIC Peter Steinberg Brookhaven National Laboratory Forward RHIC October.

V 2 and v 4 centrality, p t and particle-type dependence in Au+Au collisions at RHIC Yuting Bai for the STAR Collaboration.

INT Ridge Workshop - 5/10/20121 Correlation systematics versus RHIC/LHC theories Lanny Ray, The University of Texas at Austin The Ridge Workshop Institute.

Elliptic Flow of Inclusive Photon Elliptic Flow of Inclusive Photon Ahmed M. Hamed Midwest Critical Mass University of Toledo, Ohio Oct. 22,

Heavy Flavor Measurements at RHIC&LHC W. Xie (Purdue University, West Lafayette) W. Xie (Purdue University, West Lafayette) Open Heavy Flavor Workshop.

Toward a  +Jet Measurement in STAR Saskia Mioduszewski, for the STAR Collaboration Texas A&M University 1.

200 and 62 GeV Cu-Cu Minbias 2 particle correlations Duncan Prindle For the STAR Collaboration October 26, 2008.

Suppression of high P T hadron spectra in p+A collisions Wei-Tian Deng In Collaboration with: Rong Xu & Xin-Nian Wang arXiv:

High p T hadron production and its quantitative constraint to model parameters Takao Sakaguchi Brookhaven National Laboratory For the PHENIX Collaboration.

Two particle correlations: from RHIC to LHC Francesco Noferini Bologna University INFN – sez. Bologna ALICE-TOF Tuesday, May 16th Villasimius (Italy) HOT.

Zimanyi-School, Budapest, 03/12/2014 A. Ster, Wigner-RCP, Hungary 1 Total, elastic and inelastic cross sections of high energy pp, pA and  * A reactions.

I. Correlations: PHOBOS Data, Flux Tubes and Causality II. Ridge: Transverse Flow, Blast Wave Long Range Correlations and Hydrodynamic Expansion Sean Gavin.

Photon-jet Amir Rezaeian UTFSM, Valparaiso

Edgar Dominguez Rosas Instituto de Ciencias Nucleares

Scaling Properties of Fluctuation and Correlation Results from PHENIX

kT Asymmetry in Longitudinally Polarized ｐｐ Collisions

Identified Charged Hadron Production

Presentation transcript:

1 Azimuthal quadrupole correlation from gluon interference in 200 GeV and 7 TeV p+p collisions Lanny Ray – University of Texas at Austin The 2 nd International Conference on the Initial Stages in High-Energy Nuclear Collisions Napa Valley, CA, December 3-7, 2014

2 Introduction and Background CMS Collaboration, JHEP 1009,091(2010). Unexpected observation of same-side, long-range  correlation in high multiplicity p+p collisions at 7 TeV by CMS: Described with 2A Q cos(2  ) quadrupole p+p 7 TeV p+p 200 GeV Prindle and Trainor (STAR), Proc. XLIII Int. Symp. Multiparticle Dynamics, p. 219 (2013); arXiv: STAR Preliminary n ch =2 n ch =25

3 Introduction and Background Same-side, long-range correlations (e.g. non-jet quadrupole) are ubiquitous in high energy, high multiplicity p+p and p+A ( later in talk ) “elementary” collision systems. Is this feature caused by hydro in p+p, p+A? e.g. Bozek, Broniowski, Eur. Phys. J C 71, 1530 (2011); Phys. Lett. B 718, 1557 (2013); Phys. Rev. C 85, (2012). Or by initial-state process? e.g. color-dipole model: Kopeliovich, Phys. Rev. D 78, (2008); CGC glasma and gluon interference: Dusling, Gelis, Lappi, McLerran, Venugopalan, Nucl. Phys. A772, 200 (2006); Acta. Phys. Pol. B 37, 3253 (2006); Phys. Rev. D 87, (R) (2013); 87, (2013); BFKL-Pomeron with gluon interference: Levin and Rezaeian, Phys. Rev. D 84, (2011). Here, the Levin and Rezaeian BFKL Pomeron model with interfering gluon radiation is applied to the above correlation structure in p+p collisions.

4 E. Levin and A. H. Rezaeian, Phys. Rev. D 84, (2011) Two-BFKL Pomeron exchange with two-gluon emission & interference; parton showers N N *(Balitsky, Fadin, Kuraev, Lipatov) Levin & Rezaeian BFKL* Pomeron model probability for producing two parton showers v 2 anisotropy

5 Levin & Rezaeian BFKL Pomeron model quadrupole model uncertainty Numerical predictions require: 1)Multi-parton shower probabilities 2)Gluon saturation scale Q S 3)Proper accounting of hard scattering Assumptions: 1) Gluon  hadron (soft component), local parton hadron duality 2)# correlated pairs scale as m(m-1)/2 for m parton showers 3)Two-component (Kharzeev-Nardi) soft + hard component multiplicity model

6 Multi-parton shower probabilities p p Each shower produces a Poisson dist. For multi-parton showers: Event ensemble: Soft+hard components in 200 GeV minbias p+p STAR, Phys. Rev. D 74, (2006) Scatter plot of soft vs hard multiplicity for minimum-bias p+p collisions nsns nhnh sum over bins with constant n ch Include hard scattering component:

7 Multi-parton shower probabilities Pomerons; Pomerons P 1,2,3 = 0.802, 0.168, UA5 CMS Adjust the multi-parton shower probabilities P m to fit the frequency distribution. (These results are published in Phys. Rev. D 90, (2014).)

8 Input to model RARA Low-x partons projected onto transverse plane Parton area Gluon saturation estimates Basic idea: Scaling:

9 Application to p+p correlations

10 Results for 200 GeV p+p minbias Quadrupole amplitude vs centrality Au+Au 200 GeV 46% - 93% STAR data PRC 86, Prior to STAR’s measurement the only A Q estimates for p+p were from Au+Au extrapolation, which includes any value from 0 to peripheral  central p+p STAR preliminary (arXiv: ) A Q,mb = /  using pair weighted event averaging and the UA5 |  |<0.5 multiplicity frequency dist. The L&R model predictions with range of Q S and uncertainty for F(Q S 2 ) increasing magnitude See: Phys. Rev. D 90, (2014).

11 Results for 7 TeV p+p with large n ch The CMS “ridge” was observed in the higher n ch events, specifically N trk offline > 110 for both the p t > 0.1 GeV/c and 1.0 < p t < 3.0 GeV/c, for |  | < 2.4, corresponding to corrected n ch /  = 44. In Phys. Rev. D 84, (2011) I showed that these data were best fit with a model including a quadrupole, which in the present definition equals: A Q,Ntrk>110,pt>0.1 = /  (stat) +/  (syst)  “ridge” amplitude maximum 200 GeV STAR minbias 7 TeV CMS large n ch p t >0.1 GeV/c Energy/multiplicity trend correctly reproduced (from fit model in PRD 84, ) See: Phys. Rev. D 90, (2014).

12 Extension to p+Pb, d+Au collisions ATLAS, Phys. Rev. Lett. 110, (2013) CMS, Phys. Lett. B 724, 213 (2013) ALICE, Phys. Lett. B 719, 29 (2013) PHENIX, Phys. Rev. Lett. 111, (2013); d+Au 200 GeV – azimuth projections & quadrupole large  small N ch  quadrupole

13 Extension to p+Pb, d+Au collisions ATLAS, Phys. Rev. C 90, (2014) 1)Analyze multiplicity frequency distribution estimating parton shower probabilities 2)Estimate Q S via N part scaling 3)Use L&R equation for A Q (N ch ) Initial, naïve approach:

14 Comments and Conclusions v 2 varies between 0.05 – 0.07 for both datasets; large and similar to that in A+A. Predictions have large uncertainties; however, the L&R model can be falsified, but isn’t so far. The correctly predicted energy,n ch dependence is interesting because most factors in the model change by an order-of-magnitude or more between the two cases, this is a significant test of the model. The model with saturation limit for is falsified. I hope that these apparently successful results will encourage the QCD community to continue to work on gluon radiation – interference models, and in the gluon saturation region in particular. The next step is to apply these ideas to the p + Pb and d + Au quadrupole correlations and to then determine if this new mechanism is relevant for v 2 in A+A. (These results are published in Phys. Rev. D 90, (2014).)