Electromagnetic signatures of the color glass condensate: dileptons

Jalilian‐Marian, Jamal

doi:10.1016/j.nuclphysa.2004.04.103

Cited by 29 publications

(20 citation statements)

References 66 publications

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“…This data is confirmed by preliminary results from PHENIX [59], PHOBOS [58] and STAR [60], demonstrating that Color Glass Condensate has probably been discovered at RHIC [120]. We conclude Section 4 by listing future experimental tests [121][122][123] which need to be carried out to verify the discovery of CGC at RHIC [120].…”

Section: Introductionsupporting

confidence: 71%

Saturation physics and deuteron–gold collisions at RHIC

Jalilian‐Marian

Kovchegov

2006

Progress in Particle and Nuclear Physics

364

202

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We present a review of parton saturation/Color Glass Condensate physics in the context of deuteron-gold (d +Au) collisions at RHIC. Color Glass Condensate physics is a universal description of all high energy hadronic and nuclear interactions. It comprises classical (McLerran-Venugopalan model and Glauber-Mueller rescatterings) and quantum evolution (JIMWLK and BK equations) effects both in small-x hadronic and nuclear wave functions and in the high energy scattering processes. Proton-nucleus (or d + A) collisions present a unique opportunity to study Color Glass Condensate predictions, since many relevant observables in proton-nucleus collisions are reasonably well-understood theoretically in the Color Glass Condensate approach. In this article we review the basics of saturation/Color Glass Condensate physics and reproduce derivations of many important observables in proton (deuteron)-nucleus collisions. We compare the predictions of Color Glass physics to the data generated by d + Au experiments at RHIC and observe an agreement between the data and the theory, indicating that Color Glass Condensate has probably been discovered at RHIC. We point out further experimental measurements which need to be carried out to test the discovery.

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Section: Introductionsupporting

confidence: 71%

Saturation physics and deuteron–gold collisions at RHIC

Jalilian‐Marian

Kovchegov

2006

Progress in Particle and Nuclear Physics

364

202

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“…Prompt photon production in pA collisions was considered in [1181] through the process qA → γqX. The production of di-leptons in a similar process qA → l + l − qX was addressed in [1182,1183,1184]. At higher energies, gluons become much more abundant than quarks in the central rapidity region which implies that photon (dilepton) production will go via the process g * A → qqXγ(l + l − ).…”

Section: Kirill Tuchinmentioning

confidence: 99%

Gluons and the quark sea at high energies: distributions, polarization, tomography

Boer¹,

Diehl²,

Milner³

et al. 2011

198

291

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ForewordThe study of the fundamental structure of nuclear matter is a central thrust of physics research in the United States. As indicated in Frontiers of Nuclear Science, the 2007 Nuclear Science Advisory Committee long range plan, consideration of a future Electron-Ion Collider (EIC) is a priority and will likely be a significant focus of discussion at the next long range plan. We are therefore pleased to have supported the ten week program in fall 2010 at the Institute of Nuclear Theory which examined at length the science case for the EIC. This program was a major effort; it attracted the maximum allowable attendance over ten weeks.This report summarizes the current understanding of the physics and articulates important open questions that can be addressed by an EIC. It converges towards a set of "golden" experiments that illustrate both the science reach and the technical demands on such a facility, and thereby establishes a firm ground from which to launch the next phase in preparation for the upcoming long range plan discussions. We thank all the participants in this productive program. In particular, we would like to acknowledge the leadership and dedication of the five co-organizers of the program who are also the co-editors of this report.David Kaplan, Director, National Institute for Nuclear Theory Hugh Montgomery, Director, Thomas Jefferson National Accelerator Facility Steven Vigdor, Associate Lab Director, Brookhaven National Laboratory iii Preface This volume is based on a ten-week program on "Gluons and the quark sea at high energies", which took place at the Institute for Nuclear Theory (INT) in Seattle from September 13 to November 19, 2010. The principal aim of the program was to develop and sharpen the science case for an Electron-Ion Collider (EIC), a facility that will be able to collide electrons and positrons with polarized protons and with light to heavy nuclei at high energies, offering unprecedented possibilities for in-depth studies of quantum chromodynamics. Guiding questions were• What are the crucial science issues?• How do they fit within the overall goals for nuclear physics?• Why can't they be addressed adequately at existing facilities?• Will they still be interesting in the 2020's, when a suitable facility might be realized?The program started with a five-day workshop on "Perturbative and Non-Perturbative Aspects of QCD at Collider Energies", which was followed by eight weeks of regular program and a concluding four-day workshop on "The Science Case for an EIC".More than 120 theorists and experimentalists took part in the program over ten weeks. It was only possible to smoothly accommodate such a large number of participants because of the extraordinary efforts of the INT staff, to whom we extend our warm thanks and appreciation. We thank the INT Director, David Kaplan, for his strong support of the program and for covering a significant portion of the costs for printing this volume. We gratefully acknowledge additional financial support provided by BNL and JLab.The program w...

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“…23 shows the nuclear modification factor for both pA and dA collisions at RHIC. The calculations are for fixed rapidity, y = 2.2, and the most central collisions [142]. The HKM parameterization of the deuteron wave function is used for the deuteron projectile, a few percent effect.…”

Section: All Quark Masses Are Ignored Mmentioning

confidence: 99%

“…Photon production and photon and hadron correlation functions have been calculated using the same formalism [142]. The hadron-photon cross section is a very sensitive probe of the dipole profile, the main ingredient of singleparticle production cross section in the CGC formalism.…”

Section: All Quark Masses Are Ignored Mmentioning

confidence: 99%

Electromagnetic Probes at Rhic-Ii

David

2007

Int. J. Mod. Phys. E

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We summarize how future measurements of electromagnetic (EM) probes at the Relativistic Heavy Ion Collider (RHIC), in connection with theoretical analysis, can advance our understanding of strongly interacting matter at high energy densities and temperatures. After a brief survey of the important role that EM probes data have played at the Super Proton Synchrotron (SPS, CERN) and RHIC to date, we identify key physics objectives and observables that remain to be addressed to characterize the (strongly interacting) Quark-Gluon Plasma (sQGP) and associated transition properties at RHIC. These include medium modifications of vector mesons via low-mass dileptons, a temperature measurement of the hot phases via continuum radiation, as well as γ-γ correlations to characterize early source sizes. We outline strategies to establish microscopic matter and transition properties such as the number of degrees of freedom in the sQGP, the origin of hadron masses and manifestations of chiral symmetry restoration, which will require accompanying but rather well-defined advances in theory. Increased experimental precision, an order of magnitude higher statistics than currently achievable, as well as a detailed scan of colliding species and energies are mandatory to discriminate between theoretical interpretations. This increased precision can be achieved through hardware upgrades to the large RHIC detectors (PHENIX and STAR) along with at least a factor of ten increase in luminosity over the next few years, as envisioned for RHIC-II.

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Electromagnetic signatures of the color glass condensate: dileptons

Cited by 29 publications

References 66 publications

Saturation physics and deuteron–gold collisions at RHIC

Saturation physics and deuteron–gold collisions at RHIC

Gluons and the quark sea at high energies: distributions, polarization, tomography

Electromagnetic Probes at Rhic-Ii

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