Related papers: Direct photon production in d+A and A+A collisions…

Direct Photon Measurements at PHENIX

PHENIX has measured direct photons in p+p and Au+Au collisions at sqrt{s_{NN}}=200 GeV. The p+p measurement is in good agreement with pQCD expectations. The nuclear modification factor in Au+Au is found to be consistent with unity for all…

Nuclear Experiment · Physics 2019-08-13 Baldo Sahlmueller

Photon production from gluon mediated quark-anti-quark annihilation at confinement

Heavy ion collisions at RHIC produce direct photons at low transverse momentum, $p_{T}$ from 1-3 GeV/c, in excess of the $p$$+$$p$ spectra scaled by the nuclear overlap factor, $T_{AA}$. These low $p_{T}$ photons have a large azimuthal…

Nuclear Experiment · Physics 2015-07-29 Sarah Campbell

Directed flow of photons in Cu+Au collisions at RHIC

Event-by-event fluctuations in the positions of nucleons in two colliding identical nuclei can lead to non-uniform initial energy density distribution on the transverse plane. In addition to initial state fluctuations, the difference in the…

Nuclear Theory · Physics 2020-08-26 Pingal Dasgupta , Rupa Chatterjee , Dinesh K. Srivastava

Probing hot and dense matter production in heavy ion collisions via neutral mesons and photons with the ALICE detector at the LHC

One of the key signatures of the Quark Gluon Plasma (QGP) is the modification of hadron and direct photon spectra in heavy-ion collisions as compared to proton-proton (pp) collisions. Suppression of hadron production at high transverse…

Nuclear Experiment · Physics 2019-08-13 Astrid Morreale

Direct photon production and interferometry in $\sqrt{s}_{NN}$=200 GeV Au+Au and in $\sqrt{s}_{NN}$=2.76 TeV Pb+Pb collisions

Direct photon production, in $\sqrt{s_{NN}}$=200 GeV Au+Au and in $\sqrt{s_{NN}}$=2.76 TeV Pb+Pb collisions, are studied in a hydrodynamic model. Ideal hydrodynamic model, initialised to reproduce experimentally charged particle spectra in…

Nuclear Theory · Physics 2013-08-13 A. K. Chaudhuri

Probing gluon shadowing with forward photons at RHIC

There is a major need to better constrain nuclear parton densities in order to provide reliable perturbative QCD predictions at the LHC as well as to probe possible non-linear evolution at small values of x. In these proceedings, we discuss…

High Energy Physics - Phenomenology · Physics 2008-10-23 Francois Arleo , Thierry Gousset

Center of mass energy and system-size dependence of photon production at forward rapidity at RHIC

We present the multiplicity and pseudorapidity distributions of photons produced in Au+Au and Cu+Cu collisions at \sqrt{s_NN} = 62.4 and 200 GeV. The photons are measured in the region -3.7 < \eta < -2.3 using the photon multiplicity…

Nuclear Experiment · Physics 2010-01-15 STAR Collaboration , B. I. Abelev

Disentangling centrality bias and final-state effects in the production of high-$p_T$ $\pi^0$ using direct $\gamma$ in $d$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

PHENIX presents a simultaneous measurement of the production of direct $\gamma$ and $\pi^0$ in $d$$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV over a $p_T$ range of 7.5 to 18 GeV/$c$ for different event samples selected by event activity,…

Nuclear Experiment · Physics 2025-01-17 N. J. Abdulameer , U. Acharya , C. Aidala , Y. Akiba , M. Alfred , K. Aoki , N. Apadula , C. Ayuso , V. Babintsev , K. N. Barish , S. Bathe , A. Bazilevsky , R. Belmont , A. Berdnikov , Y. Berdnikov , L. Bichon , B. Blankenship , D. S. Blau , M. Boer , J. S. Bok , V. Borisov , M. L. Brooks , J. Bryslawskyj , V. Bumazhnov , C. Butler , S. Campbell , V. Canoa Roman , M. Chiu , M. Connors , R. Corliss , Y. Corrales Morales , M. Csanád , T. Csörgő , L. D. Liu , T. W. Danley , M. S. Daugherity , G. David , C. T. Dean , K. DeBlasio , K. Dehmelt , A. Denisov , A. Deshpande , E. J. Desmond , V. Doomra , J. H. Do , A. Drees , K. A. Drees , M. Dumancic , J. M. Durham , A. Durum , T. Elder , A. Enokizono , R. Esha , B. Fadem , W. Fan , N. Feege , M. Finger, , M. Finger , D. Firak , D. Fitzgerald , S. L. Fokin , J. E. Frantz , A. Franz , A. D. Frawley , Y. Fukuda , C. Gal , P. Garg , H. Ge , M. Giles , Y. Goto , N. Grau , S. V. Greene , T. Gunji , T. Hachiya , J. S. Haggerty , K. I. Hahn , S. Y. Han , M. Harvey , S. Hasegawa , T. O. S. Haseler , T. K. Hemmick , X. He , K. Hill , A. Hodges , K. Homma , B. Hong , T. Hoshino , N. Hotvedt , J. Huang , J. Imrek , M. Inaba , D. Isenhower , Y. Ito , D. Ivanishchev , B. V. Jacak , Z. Ji , B. M. Johnson , V. Jorjadze , D. Jouan , D. S. Jumper , J. H. Kang , D. Kapukchyan , S. Karthas , A. V. Kazantsev , V. Khachatryan , A. Khanzadeev , A. Khatiwada , C. Kim , D. J. Kim , E. -J. Kim , M. Kim , M. H. Kim , T. Kim , D. Kincses , A. Kingan , E. Kistenev , T. Koblesky , D. Kotov , L. Kovacs , S. Kudo , B. Kurgyis , K. Kurita , J. G. Lajoie , E. O. Lallow , D. Larionova , A. Lebedev , S. H. Lee , M. J. Leitch , Y. H. Leung , N. A. Lewis , S. H. Lim , M. X. Liu , X. Li , V. -R. Loggins , D. A. Loomis , D. Lynch , S. Lökös , T. Majoros , M. Makek , M. Malaev , V. I. Manko , E. Mannel , H. Masuda , M. McCumber , D. McGlinchey , A. C. Mignerey , D. E. Mihalik , A. Milov , D. K. Mishra , J. T. Mitchell , M. Mitrankova , Iu. Mitrankov , G. Mitsuka , M. M. Mondal , T. Moon , D. P. Morrison , S. I. Morrow , A. Muhammad , B. Mulilo , T. Murakami , J. Murata , K. Nagai , K. Nagashima , T. Nagashima , J. L. Nagle , M. I. Nagy , I. Nakagawa , H. Nakagomi , K. Nakano , C. Nattrass , S. Nelson , R. Nouicer , N. Novitzky , R. Novotny , T. Novák , G. Nukazuka , A. S. Nyanin , E. O'Brien , C. A. Ogilvie , J. Oh , J. D. Orjuela Koop , M. Orosz , J. D. Osborn , A. Oskarsson , K. Ozawa , V. Pantuev , V. Papavassiliou , J. S. Park , S. Park , M. Patel , S. F. Pate , W. Peng , D. V. Perepelitsa , G. D. N. Perera , C. E. PerezLara , R. Petti , M. Phipps , C. Pinkenburg , M. Potekhin , A. Pun , M. L. Purschke , P. V. Radzevich , N. Ramasubramanian , K. F. Read , V. Riabov , Y. Riabov , D. Richford , T. Rinn , M. Rosati , Z. Rowan , J. Runchey , T. Sakaguchi , H. Sako , V. Samsonov , M. Sarsour , K. Sato , S. Sato , B. Schaefer , B. K. Schmoll , R. Seidl , A. Sen , R. Seto , A. Sexton , D. Sharma , I. Shein , M. Shibata , T. -A. Shibata , K. Shigaki , M. Shimomura , Z. Shi , C. L. Silva , D. Silvermyr , M. Slunečka , K. L. Smith , S. P. Sorensen , I. V. Sourikova , P. W. Stankus , S. P. Stoll , T. Sugitate , A. Sukhanov , Z. Sun , S. Syed , R. Takahama , A. Takeda , K. Tanida , M. J. Tannenbaum , S. Tarafdar , A. Taranenko , G. Tarnai , R. Tieulent , A. Timilsina , T. Todoroki , M. Tomášek , C. L. Towell , R. S. Towell , I. Tserruya , Y. Ueda , B. Ujvari , H. W. van Hecke , S. Vazquez-Carson , J. Velkovska , M. Virius , V. Vrba , X. R. Wang , Z. Wang , Y. Watanabe , C. P. Wong , C. Xu , Q. Xu , Y. L. Yamaguchi , A. Yanovich , P. Yin , I. Yoon , J. H. Yoo , I. E. Yushmanov , H. Yu , W. A. Zajc , L. Zou

Cold-nuclear-matter effects on heavy-quark production at forward and backward rapidity in d+Au collisions at sqrt(s_NN)=200 GeV

The PHENIX experiment has measured open heavy-flavor production via semileptonic decay muons over the transverse momentum range 1 < pT < 6 GeV/c at forward and backward rapidity (1.4 < |y| < 2.0) in d+Au and p+p collisions at ?sNN = 200…

Nuclear Experiment · Physics 2019-08-13 A. Adare , C. Aidala , N. N. Ajitanand , Y. Akiba , R. Akimoto , H. Al-Bataineh , H. Al-Ta'ani , J. Alexander , K. R. Andrews , A. Angerami , K. Aoki , N. Apadula , E. Appelt , Y. Aramaki , R. Armendariz , E. C. Aschenauer , E. T. Atomssa , R. Averbeck , T. C. Awes , B. Azmoun , V. Babintsev , M. Bai , G. Baksay , L. Baksay , B. Bannier , K. N. Barish , B. Bassalleck , A. T. Basye , S. Bathe , V. Baublis , C. Baumann , A. Bazilevsky , S. Belikov , R. Belmont , J. Ben-Benjamin , R. Bennett , J. H. Bhom , D. S. Blau , J. S. Bok , K. Boyle , M. L. Brooks , D. Broxmeyer , H. Buesching , V. Bumazhnov , G. Bunce , S. Butsyk , S. Campbell , A. Caringi , P. Castera , C. -H. Chen , C. Y. Chi , M. Chiu , I. J. Choi , J. B. Choi , R. K. Choudhury , P. Christiansen , T. Chujo , P. Chung , O. Chvala , V. Cianciolo , Z. Citron , B. A. Cole , Z. Conesa del Valle , M. Connors , M. Csanád , T. Csörgő , T. Dahms , S. Dairaku , I. Danchev , K. Das , A. Datta , G. David , M. K. Dayananda , A. Denisov , A. Deshpande , E. J. Desmond , K. V. Dharmawardane , O. Dietzsch , A. Dion , M. Donadelli , O. Drapier , A. Drees , K. A. Drees , J. M. Durham , A. Durum , D. Dutta , L. D'Orazio , S. Edwards , Y. V. Efremenko , F. Ellinghaus , T. Engelmore , A. Enokizono , H. En'yo , S. Esumi , B. Fadem , D. E. Fields , M. Finger , M. Finger, , F. Fleuret , S. L. Fokin , Z. Fraenkel , J. E. Frantz , A. Franz , A. D. Frawley , K. Fujiwara , Y. Fukao , T. Fusayasu , C. Gal , I. Garishvili , A. Glenn , H. Gong , X. Gong , M. Gonin , Y. Goto , R. Granier de Cassagnac , N. Grau , S. V. Greene , G. Grim , M. Grosse Perdekamp , T. Gunji , L. Guo , H. -Å. Gustafsson , J. S. Haggerty , K. I. Hahn , H. Hamagaki , J. Hamblen , R. Han , J. Hanks , C. Harper , K. Hashimoto , E. Haslum , R. Hayano , X. He , M. Heffner , T. K. Hemmick , T. Hester , J. C. Hill , M. Hohlmann , R. S. Hollis , W. Holzmann , K. Homma , B. Hong , T. Horaguchi , Y. Hori , D. Hornback , S. Huang , T. Ichihara , R. Ichimiya , H. Iinuma , Y. Ikeda , K. Imai , M. Inaba , A. Iordanova , D. Isenhower , M. Ishihara , M. Issah , D. Ivanischev , Y. Iwanaga , B. V. Jacak , J. Jia , X. Jiang , J. Jin , D. John , B. M. Johnson , T. Jones , K. S. Joo , D. Jouan , D. S. Jumper , F. Kajihara , J. Kamin , S. Kaneti , B. H. Kang , J. H. Kang , J. S. Kang , J. Kapustinsky , K. Karatsu , M. Kasai , D. Kawall , M. Kawashima , A. V. Kazantsev , T. Kempel , A. Khanzadeev , K. M. Kijima , J. Kikuchi , A. Kim , B. I. Kim , D. J. Kim , E. -J. Kim , Y. -J. Kim , Y. K. Kim , E. Kinney , Á. Kiss , E. Kistenev , D. Kleinjan , P. Kline , L. Kochenda , B. Komkov , M. Konno , J. Koster , D. Kotov , A. Král , A. Kravitz , G. J. Kunde , K. Kurita , M. Kurosawa , Y. Kwon , G. S. Kyle , R. Lacey , Y. S. Lai , J. G. Lajoie , A. Lebedev , D. M. Lee , J. Lee , K. B. Lee , K. S. Lee , S. H. Lee , S. R. Lee , M. J. Leitch , M. A. L. Leite , X. Li , P. Lichtenwalner , P. Liebing , S. H. Lim , L. A. Linden Levy , T. Liška , H. Liu , M. X. Liu , B. Love , D. Lynch , C. F. Maguire , Y. I. Makdisi , M. D. Malik , A. Manion , V. I. Manko , E. Mannel , Y. Mao , H. Masui , F. Matathias , M. McCumber , P. L. McGaughey , D. McGlinchey , C. McKinney , N. Means , M. Mendoza , B. Meredith , Y. Miake , T. Mibe , A. C. Mignerey , K. Miki , A. Milov , J. T. Mitchell , Y. Miyachi , A. K. Mohanty , H. J. Moon , Y. Morino , A. Morreale , D. P. Morrison , S. Motschwiller , T. V. Moukhanova , T. Murakami , J. Murata , S. Nagamiya , J. L. Nagle , M. Naglis , M. I. Nagy , I. Nakagawa , Y. Nakamiya , K. R. Nakamura , T. Nakamura , K. Nakano , S. Nam , J. Newby , M. Nguyen , M. Nihashi , R. Nouicer , A. S. Nyanin , C. Oakley , E. O'Brien , S. X. Oda , C. A. Ogilvie , M. Oka , K. Okada , Y. Onuki , A. Oskarsson , M. Ouchida , K. Ozawa , R. Pak , V. Pantuev , V. Papavassiliou , B. H. Park , I. H. Park , S. K. Park , W. J. Park , S. F. Pate , L. Patel , H. Pei , J. -C. Peng , H. Pereira , D. Yu. Peressounko , R. Petti , C. Pinkenburg , R. P. Pisani , M. Proissl , M. L. Purschke , H. Qu , J. Rak , I. Ravinovich , K. F. Read , S. Rembeczki , K. Reygers , V. Riabov , Y. Riabov , E. Richardson , D. Roach , G. Roche , S. D. Rolnick , M. Rosati , C. A. Rosen , S. S. E. Rosendahl , P. Ružička , B. Sahlmueller , N. Saito , T. Sakaguchi , K. Sakashita , V. Samsonov , S. Sano , M. Sarsour , T. Sato , M. Savastio , S. Sawada , K. Sedgwick , J. Seele , R. Seidl , R. Seto , D. Sharma , I. Shein , T. -A. Shibata , K. Shigaki , H. H. Shim , M. Shimomura , K. Shoji , P. Shukla , A. Sickles , C. L. Silva , D. Silvermyr , C. Silvestre , K. S. Sim , B. K. Singh , C. P. Singh , V. Singh , M. Slunečka , T. Sodre , R. A. Soltz , W. E. Sondheim , S. P. Sorensen , I. V. Sourikova , P. W. Stankus , E. Stenlund , S. P. Stoll , T. Sugitate , A. Sukhanov , J. Sun , J. Sziklai , E. M. Takagui , A. Takahara , A. Taketani , R. Tanabe , Y. Tanaka , S. Taneja , K. Tanida , M. J. Tannenbaum , S. Tarafdar , A. Taranenko , E. Tennant , H. Themann , D. Thomas , T. L. Thomas , M. Togawa , A. Toia , L. Tomášek , M. Tomášek , H. Torii , R. S. Towell , I. Tserruya , Y. Tsuchimoto , K. Utsunomiya , C. Vale , H. Valle , H. W. van Hecke , E. Vazquez-Zambrano , A. Veicht , J. Velkovska , R. Vértesi , M. Virius , A. Vossen , V. Vrba , E. Vznuzdaev , X. R. Wang , D. Watanabe , K. Watanabe , Y. Watanabe , Y. S. Watanabe , F. Wei , R. Wei , J. Wessels , S. N. White , D. Winter , C. L. Woody , R. M. Wright , M. Wysocki , Y. L. Yamaguchi , K. Yamaura , R. Yang , A. Yanovich , J. Ying , S. Yokkaichi , J. S. Yoo , Z. You , G. R. Young , I. Younus , I. E. Yushmanov , W. A. Zajc , A. Zelenski , S. Zhou

Electromagnetic signals from Au+Au collisions at RHIC energy, $\sqrt{s_{NN}}$=200 GeV and Pb+Pb collisions at LHC energy, $\sqrt{s_{NN}}$=2.76 TeV

We analyse the recently available experimental data on direct photon productions from Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV RHIC and from Pb+Pb collisions at $\sqrt{s_{NN}}$=2.76 TeV LHC energies. The transverse momentum ($p_T$)…

Nuclear Theory · Physics 2015-06-11 Jajati K. Nayak , Bikash Sinha

High-p_T Pion Production in Heavy-Ion Collisions at RHIC energies

Perturbative QCD results on pion production are presented in proton-proton, proton-nucleus and nucleus-nucleus collisions from CERN SPS up to RHIC energy. A K_{jet}(s, p_T, Q) factor obtained from jet production is applied to perform…

Nuclear Theory · Physics 2017-08-23 G. G. Barnafoldi , P. Levai , G. Papp , G. Fai , Y. Zhang

Measurement of photons via conversion pairs in Au+Au collisions at sqrt(s_NN) = 200 GeV with the PHENIX experiment at RHIC

Thermal photons can provide information on the temperature of the new state of matter created at RHIC. In the p_T region of 1--3 GeV/c thermal photons are expected to be the dominant direct photon source. Therefore, a possible excess…

Nuclear Experiment · Physics 2019-08-13 Torsten Dahms

Cronin Effect at Different Rapidities at RHIC

Calculations of the nuclear modification factor, R_dAu, for pi^0 production in dAu collisions at s_NN^1/2 = 200 GeV are presented. The applied pQCD-improved parton model incorporates intrinsic k_T. Nuclear multiscattering and nuclear…

Nuclear Theory · Physics 2015-06-26 G. G. Barnafoldi , G. Papp , P. Levai , G. Fai

Hadrons and direct photon in pp and pA collisions at LHC and saturation effects

We investigate hadrons and direct photon production in pp and pA collisions at the energies of RHIC and LHC within the color-dipole approach employing various saturation models. We show that greatest sensitivity to saturation effects is…

High Energy Physics - Phenomenology · Physics 2010-06-23 Amir H. Rezaeian , Andreas Schaefer

Photon-tagged heavy meson production in high energy nuclear collisions

We study the photon-triggered light and heavy meson production in both p+p and A+A collisions. We find that a parton energy loss approach that successfully describes inclusive hadron attenuation in nucleus-nucleus reactions at RHIC can…

High Energy Physics - Phenomenology · Physics 2011-08-11 Zhong-Bo Kang , Ivan Vitev

Semi-inclusive direct photon+jet and $\pi^{0}$+jet correlations measured in $p+p$ and central Au+Au collisions at $\sqrt{s_\mathrm{NN}} = 200$ GeV

The STAR experiment at RHIC reports new measurements of jet quenching based on the semi-inclusive distribution of charged-particle jets recoiling from direct photon ($\gamma_{\rm dir}$) and neutral pion ($\pi^{0}$) triggers in pp and…

Nuclear Experiment · Physics 2025-05-08 The STAR Collaboration

Testing the theory of QGP-induced energy loss at RHIC and the LHC

We compare an analytic model of jet quenching, based on the GLV non-Abelian energy loss formalism, to numerical results for the centrality dependent suppression of hadron cross sections in Au+Au and Cu+Cu collisions at RHIC. Simulations of…

High Energy Physics - Phenomenology · Physics 2008-11-26 Ivan Vitev

Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200 GeV and implications for the initial temperature

The production of low mass e+e- pairs for m_{e+e-} < 300 MeV/c^2 and 1 < p_T <5 GeV/c is measured in p+p and Au+Au collisions at sqrt(s_NN)=200 GeV. Enhanced yield above hadronic sources is observed. Treating the excess as internal…

Nuclear Experiment · Physics 2010-05-12 The PHENIX Collaboration , A. Adare

PHENIX results on jet modification with $\pi^0$- and photon-triggered two particle correlations in $p$$+$$p$, $p(d)$+Au, and Au+Au collisions

As a colorless probe, direct photons balance the $p_T$ of the away-side jet at leading order. Direct photon-hadron correlations are thus an excellent probe for nuclear structure and QCD effects, including parton energy loss in the…

High Energy Physics - Experiment · Physics 2019-08-13 J. D. Osborn

A compendium of cold-nuclear matter baseline predictions in light-ion collisions

The recent light-ion collision programme at RHIC and the LHC provides a unique opportunity to investigate the onset of quark-gluon plasma formation and parton energy loss in small systems. A quantitative interpretation of emerging jet…

High Energy Physics - Phenomenology · Physics 2026-03-04 Florian Jonas , Constantin Loizides , Aleksas Mazeliauskas , Petja Paakkinen , Nicolas Strangmann