Related papers: Direct virtual photon production in Au+Au collisio…

Effect of quark-jet energy loss on direct photons in ultrarelativistic heavy-ion collisions

We discuss the transverse momentum distribution of thermal and prompt photons in ultrarelativistic heavy ion collisions. The prompt photons are mostly produced by fragmentation of quark jets (bremsstrahlung). If these quark jets suffer a…

High Energy Physics - Phenomenology · Physics 2007-05-23 Adrian Dumitru , Nils Hammon

Inclusive pi^0, eta, and direct photon production at high transverse momentum in p+p and d+Au collisions at sqrt(s_NN) = 200 GeV

We report a measurement of high-p_T inclusive pi^0, eta, and direct photon production in p+p and d+Au collisions at sqrt(s_NN) = 200 GeV at midrapidity (0 < eta < 1). Photons from the decay pi^0 -> gamma gamma were detected in the Barrel…

High Energy Physics - Experiment · Physics 2014-11-20 The STAR Collaboration , B. I. Abelev

Azimuthal correlations of high-pT photons and hadrons in Au+Au collisions at RHIC

The measurement of gamma+jet events with a direct photon in coincidence with an energetic parton can provide unique insights into the propagation and fragmentation of the parton in the presence of the hot and dense medium created in…

Nuclear Experiment · Physics 2019-08-14 Thomas Dietel

Direct photon-charged hadron coincidence measurements in STAR

The multiplicities of charged particle with transverse momentum (3 $<$ $p_T^{h^{\pm}}$ $<$ 16 $\mathrm GeV/c$) and pseudorapidity ($\mid\eta\mid$ $\leq$ 1.0) associated with direct photons and $\pi^{0}$ of high transverse momentum (8 $<$…

Nuclear Experiment · Physics 2014-11-20 Ahmed M. Hamed

Measurement of dielectron production in central Pb-Pb collisions at $\sqrt{{\textit{s}}_{\mathrm{NN}}}$ = 2.76 TeV

The first measurement of dielectron ($\mathrm{e}^{+}\mathrm{e}^{-}$) production in central (0$-$10$\%$) Pb-Pb collisions at $\mathbf{\sqrt{{\textit{s}}_{\mathrm{NN}}}}$ = 2.76 TeV at the LHC is presented. The dielectron invariant-mass…

Nuclear Experiment · Physics 2019-06-06 ALICE Collaboration

High transverse momentum triggered correlations over a large pseudorapidity acceptance in Au+Au collisions at sqrt(s_NN)=200 GeV

A measurement of two-particle correlations with a high transverse momentum trigger particle (p_T^{trig} > 2.5 GeV/c) is presented for Au+Au collisions at sqrt(s_NN) = 200 GeV over the uniquely broad longitudinal acceptance of the PHOBOS…

Nuclear Experiment · Physics 2019-08-13 B. Alver

Charged antiparticle to particle ratios near midrapidity in p+p collisions at sqrt(s_NN)=200 GeV

The ratios of the yields of primary charged antiparticles to particles have been obtained for pions, kaons, and protons near midrapidity for p+p collisions at sqrt(s_NN) = 200 GeV. Ratios of <pi-/pi+>=1.000 +/- 0.012 (stat.) +/- 0.019…

Nuclear Experiment · Physics 2008-11-26 the PHOBOS Collaboration , B. B. Back

Two-particle Direct Photon-Jet Correlation Measurements in PHENIX

Various 2-particle direct photon-hadron correlation strengths and yields in $p+p$ and $Au+Au$ collisions at sqrtsNN= 200 GeV are presented. The per-trigger yield of direct photon hadron pairs from direct-photon-jet correlations in is…

Nuclear Experiment · Physics 2009-01-13 Justin Frantz

Exclusive photon-photon production of muon pairs in proton-proton collisions at sqrt(s) = 7 TeV

A measurement of the exclusive two-photon production of muon pairs in proton-proton collisions at sqrt(s)= 7 TeV, pp to p mu^+ mu^- p, is reported using data corresponding to an integrated luminosity of 40 inverse picobarns. For muon pairs…

High Energy Physics - Experiment · Physics 2012-08-27 CMS Collaboration

Dielectron Mass Spectra from Au+Au Collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV

We report the STAR measurements of dielectron ($e^+e^-$) production at midrapidity ($|y_{ee}|<$1) in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200\,GeV. The measurements are evaluated in different invariant mass regions with a focus on…

High Energy Physics - Experiment · Physics 2014-07-16 STAR Collaboration , L. Adamczyk , J. K. Adkins , G. Agakishiev , M. M. Aggarwal , Z. Ahammed , I. Alekseev , J. Alford , C. D. Anson , A. Aparin , D. Arkhipkin , E. C. Aschenauer , G. S. Averichev , A. Banerjee , D. R. Beavis , R. Bellwied , A. Bhasin , A. K. Bhati , P. Bhattarai , H. Bichsel , J. Bielcik , J. Bielcikova , L. C. Bland , I. G. Bordyuzhin , W. Borowski , J. Bouchet , A. V. Brandin , S. G. Brovko , S. Bültmann , I. Bunzarov , T. P. Burton , J. Butterworth , H. Caines , M. Calderóndze la Barca Sánchez , D. Cebra , R. Cendejas , M. C. Cervantes , P. Chaloupka , Z. Chang , S. Chattopadhyay , H. F. Chen , J. H. Chen , L. Chen , J. Cheng , M. Cherney , A. Chikanian , W. Christie , J. Chwastowski , M. J. M. Codrington , G. Contin , J. G. Cramer , H. J. Crawford , X. Cui , S. Das , A. Davila Leyva , L. C. De Silva , R. R. Debbe , T. G. Dedovich , J. Deng , A. A. Derevschikov , R. Derradi de Souza , S. Dhamija , B. di Ruzza , L. Didenko , C. Dilks , F. Ding , P. Djawotho , X. Dong , J. L. Drachenberg , J. E. Draper , C. M. Du , L. E. Dunkelberger , J. C. Dunlop , L. G. Efimov , J. Engelage , K. S. Engle , G. Eppley , L. Eun , O. Evdokimov , R. Fatemi , S. Fazio , J. Fedorisin , P. Filip , E. Finch , Y. Fisyak , C. E. Flores , C. A. Gagliardi , D. R. Gangadharan , D. Garand , F. Geurts , A. Gibson , M. Girard , S. Gliske , L. Greiner , D. Grosnick , D. S. Gunarathne , Y. Guo , A. Gupta , S. Gupta , W. Guryn , B. Haag , O. Hajkova , A. Hamed , L-X. Han , R. Haque , J. W. Harris , S. Heppelmann , A. Hirsch , G. W. Hoffmann , D. J. Hofman , S. Horvat , B. Huang , H. Z. Huang , X. Huang , P. Huck , T. J. Humanic , G. Igo , W. W. Jacobs , H. Jang , E. G. Judd , S. Kabana , D. Kalinkin , K. Kang , K. Kauder , H. W. Ke , D. Keane , A. Kechechyan , A. Kesich , Z. H. Khan , D. P. Kikola , I. Kisel , A. Kisiel , D. D. Koetke , T. Kollegger , J. Konzer , I. Koralt , L. Kotchenda , A. F. Kraishan , P. Kravtsov , K. Krueger , I. Kulakov , L. Kumar , R. A. Kycia , M. A. C. Lamont , J. M. Landgraf , K. D. Landry , J. Lauret , A. Lebedev , R. Lednicky , J. H. Lee , M. J. LeVine , C. Li , W. Li , X. Li , X. Li , Y. Li , Z. M. Li , M. A. Lisa , F. Liu , T. Ljubicic , W. J. Llope , M. Lomnitz , R. S. Longacre , X. Luo , G. L. Ma , Y. G. Ma , D. M. M. D. Madagodagettige Don , D. P. Mahapatra , R. Majka , S. Margetis , C. Markert , H. Masui , H. S. Matis , D. McDonald , T. S. McShane , N. G. Minaev , S. Mioduszewski , B. Mohanty , M. M. Mondal , D. A. Morozov , M. K. Mustafa , B. K. Nandi , Md. Nasim , T. K. Nayak , J. M. Nelson , G. Nigmatkulov , L. V. Nogach , S. Y. Noh , J. Novak , S. B. Nurushev , G. Odyniec , A. Ogawa , K. Oh , A. Ohlson , V. Okorokov , E. W. Oldag , D. L. Olvitt , M. Pachr , B. S. Page , S. K. Pal , Y. X. Pan , Y. Pandit , Y. Panebratsev , T. Pawlak , B. Pawlik , H. Pei , C. Perkins , W. Peryt , P. Pile , M. Planinic , J. Pluta , N. Poljak , J. Porter , A. M. Poskanzer , N. K. Pruthi , M. Przybycien , P. R. Pujahari , J. Putschke , H. Qiu , A. Quintero , S. Ramachandran , R. Raniwala , S. Raniwala , R. L. Ray , C. K. Riley , H. G. Ritter , J. B. Roberts , O. V. Rogachevskiy , J. L. Romero , J. F. Ross , A. Roy , L. Ruan , J. Rusnak , N. R. Sahoo , P. K. Sahu , I. Sakrejda , S. Salur , J. Sandweiss , E. Sangaline , A. Sarkar , J. Schambach , R. P. Scharenberg , A. M. Schmah , W. B. Schmidke , N. Schmitz , J. Seger , P. Seyboth , N. Shah , E. Shahaliev , P. V. Shanmuganathan , M. Shao , B. Sharma , W. Q. Shen , S. S. Shi , Q. Y. Shou , E. P. Sichtermann , R. N. Singaraju , M. J. Skoby , D. Smirnov , N. Smirnov , D. Solanki , P. Sorensen , H. M. Spinka , B. Srivastava , T. D. S. Stanislaus , J. R. Stevens , R. Stock , M. Strikhanov , B. Stringfellow , M. Sumbera , X. Sun , X. M. Sun , Y. Sun , Z. Sun , B. Surrow , D. N. Svirida , T. J. M. Symons , M. A. Szelezniak , J. Takahashi , A. H. Tang , Z. Tang , T. Tarnowsky , J. H. Thomas , A. R. Timmins , D. Tlusty , M. Tokarev , S. Trentalange , R. E. Tribble , P. Tribedy , B. A. Trzeciak , O. D. Tsai , J. Turnau , T. Ullrich , D. G. Underwood , G. Van Buren , G. van Nieuwenhuizen , M. Vandenbroucke , J. A. Vanfossen, , R. Varma , G. M. S. Vasconcelos , A. N. Vasiliev , R. Vertesi , F. Videbæk , Y. P. Viyogi , S. Vokal , A. Vossen , M. Wada , F. Wang , G. Wang , H. Wang , J. S. Wang , X. L. Wang , Y. Wang , Y. Wang , G. Webb , J. C. Webb , G. D. Westfall , H. Wieman , S. W. Wissink , R. Witt , Y. F. Wu , Z. Xiao , W. Xie , K. Xin , H. Xu , J. Xu , N. Xu , Q. H. Xu , Y. Xu , Z. Xu , W. Yan , C. Yang , Y. Yang , Y. Yang , Z. Ye , P. Yepes , L. Yi , K. Yip , I-K. Yoo , N. Yu , Y. Zawisza , H. Zbroszczyk , W. Zha , J. B. Zhang , J. L. Zhang , S. Zhang , X. P. Zhang , Y. Zhang , Z. P. Zhang , F. Zhao , J. Zhao , C. Zhong , X. Zhu , Y. H. Zhu , Y. Zoulkarneeva , M. Zyzak

High-$p_{_{T}}$ Direct Photon Azimuthal Correlation Measurements

The azimuthal correlations of direct photons ($\gamma_{_{dir}}$) with high transverse momentum ($p_{_{T}}$), produced at mid-rapidity ($|\eta^{\gamma_{_{dir}}}|<1$) in Au+Au collisions at center-of-mass energy $\sqrt{s_{_{NN}}}=200$~GeV,…

Nuclear Experiment · Physics 2015-06-22 Ahmed M. Hamed

Direct Photons at RHIC

Direct photons are ideal tools to investigate kinematical and thermodynamical conditions of heavy ion collisions since they are emitted from all stages of the collision and once produced they leave the interaction region without further…

Nuclear Experiment · Physics 2019-08-13 G. David

Identified charged hadron production in Au+Au collisions at $\sqrt{s_\mathrm{NN}}$ = 54.4 GeV with the STAR detector

We present results on the production of $\pi^{\pm}$, $K^{\pm}$, $p$, and $\bar{p}$ in Au+Au collisions at $\sqrt{s_\mathrm{NN}}$ = 54.4~GeV using the STAR detector at RHIC, at midrapidity ($|y| <$ 0.1). Invariant yields of these particles…

Nuclear Experiment · Physics 2026-05-22 STAR Collaboration , B. E. Aboona , J. Adam , G. Agakishiev , I. Aggarwal , M. M. Aggarwal , Z. Ahammed , A. Aitbayev , I. Alekseev , E. Alpatov , A. K. Alshammri , A. Aparin , S. Aslam , J. Atchison , G. S. Averichev , V. Bairathi , X. Bao , P. Barik , K. Barish , S. Behera , P. Bhagat , A. Bhasin , S. Bhatta , I. G. Bordyuzhin , J. D. Brandenburg , A. V. Brandin , C. Broodo , X. Z. Cai , H. Caines , M. Calderón de la Barca Sánchez , D. Cebra , J. Ceska , I. Chakaberia , Y. S. Chang , Z. Chang , A. Chatterjee , D. Chen , J. H. Chen , L. Chen , Q. Chen , W. Chen , Z. Chen , J. Cheng , Y. Cheng , W. Christie , X. Chu , S. Corey , H. J. Crawford , G. Dale-Gau , A. Das , D. De Souza Lemos , T. G. Dedovich , I. M. Deppner , A. A. Derevschikov , A. Deshpande , A. Dhamija , A. Dimri , P. Dixit , X. Dong , J. L. Drachenberg , E. Duckworth , J. C. Dunlop , Y. S. El-Feky , J. Engelage , G. Eppley , S. Esumi , O. Evdokimov , O. Eyser , B. Fan , Y. Fang , R. Fatemi , S. Fazio , H. Feng , Y. Feng , E. Finch , Y. Fisyak , F. A. Flor , B. Fu , C. Fu , T. Fu , T. Gao , Y. Gao , G. Garcia , F. Geurts , A. Gibson , A. Giri , K. Gopal , X. Gou , D. Grosnick , A. Gu , J. Gu , A. Gupta , A. Hamed , R. J. Hamilton , J. Han , X. Han , M. D. Harasty , J. W. Harris , H. Harrison-Smith , L. B. Havener , X. H. He , Y. He , C. Hu , Q. Hu , Y. Hu , H. Huang , H. Z. Huang , S. L. Huang , T. Huang , Y. Huang , Y. Huang , Y. Huang , M. Isshiki , W. W. Jacobs , A. Jalotra , C. Jena , Y. Ji , J. Jia , X. Jiang , C. Jin , Y. Jin , N. Jindal , X. Ju , E. G. Judd , S. Kabana , D. Kalinkin , J. Kang , K. Kang , A. R. Kanuganti , D. Kapukchyan , K. Kauder , D. Keane , A. Kechechyan , M. Kesler , A. Khanal , A. Khanal , J. Kim , A. Kiselev , A. G. Knospe , L. Kochenda , Y. Kong , A. A. Korobitsin , B. Korodi , A. Yu. Kraeva , P. Kravtsov , L. Kumar , M. C. Labonte , R. Lacey , J. M. Landgraf , C. Larson , A. Lebedev , R. Lednicky , J. H. Lee , Y. H. Leung , C. Li , D. Li , H-S. Li , H. Li , H. Li , H. Li , W. Li , X. Li , X. Li , Y. Li , Z. Li , Z. Li , X. Liang , T. Lin , Y. Lin , C. Liu , G. Liu , H. Liu , L. Liu , L. Liu , Z. Liu , Z. Liu , T. Ljubicic , O. Lomicky , E. M. Loyd , T. Lu , J. Luo , X. F. Luo , V. B. Luong , L. Ma , R. Ma , Y. G. Ma , N. Magdy , R. Manikandhan , O. Matonoha , K. Menduli , K. Mi , N. G. Minaev , B. Mohanty , B. Mondal , M. M. Mondal , I. Mooney , D. A. Morozov , M. I. Nagy , C. J. Naim , A. S. Nain , J. D. Nam , M. Nasim , H. Nasrulloh , E. Nedorezov , J. M. Nelson , M. Nie , G. Nigmatkulov , T. Niida , L. V. Nogach , T. Nonaka , G. Odyniec , A. Ogawa , S. Oh , V. A. Okorokov , K. Okubo , B. S. Page , M. Pal , S. Pal , A. Pandav , A. Panday , A. K. Pandey , Y. Panebratsev , T. Pani , P. Parfenov , A. Paul , S. Paul , C. Perkins , S. Ping , I. D. Ponce Pinto , M. Posik , E. Pottebaum , A. Povarov , S. Prodhan , T. L. Protzman , N. K. Pruthi , J. Putschke , Y. Qi , Z. Qin , H. Qiu , C. Racz , S. K. Radhakrishnan , A. Rana , R. L. Ray , C. W. Robertson , O. V. Rogachevsky , M. A. Rosales Aguilar , D. Roy , L. Ruan , A. K. Sahoo , N. R. Sahoo , H. Sako , S. Salur , S. S. Sambyal , E. Samigullin , D. T. Samuel , J. K. Sandhu , S. Sato , B. C. Schaefer , N. Schmitz , J. Seger , R. Seto , P. Seyboth , N. Shah , E. Shahaliev , P. V. Shanmuganathan , T. Shao , M. Sharma , N. Sharma , R. Sharma , S. R. Sharma , A. I. Sheikh , D. Shen , D. Y. Shen , K. Shen , S. Shi , Y. Shi , Shilpa , E. Shulga , F. Si , J. Singh , S. Singha , P. Sinha , M. J. Skoby , Y. Söhngen , Y. Song , T. D. S. Stanislaus , M. Strikhanov , Y. Su , X. Sun , Y. Sun , B. Surrow , D. N. Svirida , Z. W. Sweger , A. C. Tamis , A. H. Tang , Z. Tang , A. Taranenko , T. Tarnowsky , J. H. Thomas , A. Timofeev , D. Tlusty , M. V. Tokarev , D. Torres-Valladares , S. Trentalange , O. D. Tsai , C. Y. Tsang , Z. Tu , J. E. Tyler , T. Ullrich , D. G. Underwood , G. Van Buren , A. N. Vasiliev , F. Videbæk , S. Vokal , S. A. Voloshin , F. Wang , G. Wang , G. Wang , J. S. Wang , J. Wang , K. Wang , X. Wang , Y. Wang , Y. Wang , Y. Wang , Z. Wang , Z. Wang , Z. Wang , J. C. Webb , P. C. Weidenkaff , G. D. Westfall , H. Wieman , G. Wilks , S. W. Wissink , C. P. Wong , J. Wu , X. Wu , X. Wu , X. Wu , B. Xi , Y. Xiao , Z. G. Xiao , G. Xie , W. Xie , H. Xu , N. Xu , Q. H. Xu , X. Xu , Y. Xu , Y. Xu , Y. Xu , Y. Xu , Z. Xu , Z. Xu , G. Yan , Z. Yan , C. Yang , Q. Yang , S. Yang , Y. Yang , Z. Ye , Z. Ye , L. Yi , Y. Yu , W. Yuan , W. Zha , C. Zhang , D. Zhang , J. Zhang , K. Zhang , L. Zhang , S. Zhang , W. Zhang , X. Zhang , Y. Zhang , Y. Zhang , Y. Zhang , Y. Zhang , Z. Zhang , Z. Zhang , F. Zhao , J. Zhao , S. Zhou , Y. Zhou , C. Zhu , X. Zhu , M. Zurek , M. Zyzak

A Global Test of QCD Theories for Direct Photon Production

Direct photon production data at fixed target and collider experiments from $pp$ and $\bar{p}p$ collisions are analysed in NLO QCD. The results are grouped into three sets having $\sqrt{s}=20-30$ GeV, 630 GeV and 1.8 TeV. It is seen that at…

High Energy Physics - Phenomenology · Physics 2007-05-23 E. Quack , D. K. Srivastava

Mid-rapidity anti-proton to proton ratio from Au+Au collisions at $ \sqrt{s_{NN}} = 130$ GeV

We report results on the ratio of mid-rapidity anti-proton to proton yields in Au+Au collisions at $\rts = 130$ GeV per nucleon pair as measured by the STAR experiment at RHIC. Within the rapidity and transverse momentum range of $|y|<0.5$…

Nuclear Experiment · Physics 2010-05-28 C. Adler

Photoproduction of J/psi and of high mass e+e- in ultra-peripheral Au+Au collisions at sqrt(s_NN) = 200 GeV

We present the first measurement of photoproduction of J/psi and of two-photon production of high-mass e+e- pairs in electromagnetic (or ultra-peripheral) nucleus-nucleus interactions, using Au+Au data at sqrt(s_NN) = 200 GeV. The events…

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

Photon and neutral pion production in Au+Au collisions at sqrt(s_{NN}) = 130 GeV

We report the first inclusive photon measurements about mid-rapidity (|y|<0.5) from Au+Au collisions at sqrt(s_{NN}) = 130 GeV at RHIC. Photon pair conversions were reconstructed from electron and positron tracks measured with the Time…

Nuclear Experiment · Physics 2012-08-27 STAR Collaboration

Rapidity and species dependence of particle production at large transverse momentum for $d$+Au collisions at \sqrt s_NN = 200 GeV

We determine rapidity asymmetry in the production of charged pions, protons and anti-protons for large transverse momentum (pT) for d+Au collisions at \sqrt s_NN = 200 GeV. The identified hadrons are measured in the rapidity regions |y| <…

Nuclear Experiment · Physics 2012-08-27 STAR Collaboration

Measurement of Isolated Prompt Photon Production in Photon-Photon Collisions at sqrt(s)_ee=183-209 GeV

For the first time at LEP the production of prompt photons is studied in the collisions of quasi-real photons using the OPAL data taken at e+e- centre-of-mass energies between 183 GeV and 209 GeV. The total inclusive production…

High Energy Physics - Experiment · Physics 2008-11-26 The OPAL collaboration , G. Abbiendi

Direct photons from Au+Au collisions at RHIC: QGP vs. hot hadronic gas

We have analysed the preliminary PHENIX data on the transverse momentum distribution of direct photons in 0-20% centrality Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. In ideal hydrodynamics, data are explained if Au+Au collision produces…

Nuclear Theory · Physics 2007-05-23 A. K. Chaudhuri