System size dependence of nuclear modification and azimuthal anisotropy of jet quenching
作者： Somnath De , Dinesh K Srivastava
DOI: 10.1088/0954-3899/39/1/015001
关键词: Physics 、 Path length 、 Quark 、 Nuclear physics 、 Energy (signal processing) 、 Mean free path 、 Particle physics 、 Pion 、 Gluon 、 Jet quenching 、 Parton
摘要: We investigate the system size dependence of jet-quenching by analyzing transverse momentum spectra neutral pions in Au+Au and Cu+Cu collisions at $\sqrt{s_{\textrm{NN}}}$ =200 GeV for different centralities. The fast partons are assumed to lose energy radiating gluons as they traverse plasma undergo multiple collisions. loss per collision, $\epsilon$, is taken proportional $E$(where $E$ parton), $\sqrt{E}$, or a constant depending on whether formation time gluon less than mean path, greater free path but length, length partons, respectively. NLO pQCD used evaluate pion production modifying fragmentation function account loss. reproduce nuclear modification factor $R_\textrm{AA}$ treating $\epsilon$ only parameter, centrality mechanism These values seen explain prompt photons, caused lost final state quarks before fragment into photons. also azimuthal asymmetry distribution within two photons fair agreement with experimental data.
arxiv.org
sci-hub.se 参考文章(105)
Xin-Nian Wang, Zheng Huang, Medium-induced parton energy loss in γ +jet events of high-energy heavy-ion collisions Physical Review C. ,vol. 55, pp. 3047- 3061 ,(1997) , 10.1103/PHYSREVC.55.3047
Ivan Vitev, Miklos Gyulassy, Peter Levai, Jet quenching in thin quark–gluon plasmas I: formalism Nuclear Physics. ,vol. 571, pp. 197- 233 ,(2000) , 10.1016/S0550-3213(99)00713-0
Steffen A. Bass, Charles Gale, Abhijit Majumder, Chiho Nonaka, Guang-You Qin, Thorsten Renk, Jörg Ruppert, Systematic comparison of jet energy-loss schemes in a realistic hydrodynamic medium Physical Review C. ,vol. 79, pp. 024901- ,(2009) , 10.1103/PHYSREVC.79.024901
W. Liu, R. J. Fries, Probing nuclear matter with jet conversions Physical Review C. ,vol. 77, pp. 054902- ,(2008) , 10.1103/PHYSREVC.77.054902
Xin-Nian Wang, Miklos Gyulassy, Gluon shadowing and jet quenching in A + A collisions at s**(1/2) = 200-GeV Physical Review Letters. ,vol. 68, pp. 1480- 1483 ,(1992) , 10.1103/PHYSREVLETT.68.1480
Tadaaki Isobe, forthe PHENIX Collaboration, None, Systematic study of high-pT direct photon production with the PHENIX experiment at RHIC Journal of Physics G. ,vol. 34, pp. 1015- 1015 ,(2007) , 10.1088/0954-3899/34/8/S146
Ahmed Hamed, STAR Collaboration, None, Azimuthal anisotropy (v2) of high-pT π0 and direct γ in Au+Au collisions at = 200 GeV Journal of Physics: Conference Series. ,vol. 270, pp. 012010- ,(2011) , 10.1088/1742-6596/270/1/012010
AT Basye, D Isenhower, DS Jumper, NA Sparks, RS Towell, JP Wood, RM Wright, M Mishra, BK Singh, CP Singh, V Singh, S Tarafdar, RK Choudhury, D Dutta, AK Mohanty, P Shukla, M Bai, KA Drees, YI Makdisi, B Azmoun, A Bazilevsky, S Belikov, H Buesching, G Bunce, M Chiu, G David, EJ Desmond, A Franz, JS Haggerty, J Jia, BM Johnson, E Kistenev, D Lynch, A Milov, JT Mitchell, DP Morrison, R Nouicer, E O'Brien, R Pak, C Pinkenburg, RP Pisani, ML Purschke, T Sakaguchi, A Sickles, IV Sourikova, SP Stoll, A Sukhanov, MJ Tannenbaum, C Vale, SN White, CL Woody, KN Barish, S Bathe, O Chvala, T Hester, A Morreale, SD Rolnick, K Sedgwick, R Seto, M Finger, P Mikeš, M Slunečka, EJ Kim, X Li, S Zhou, Y Aramaki, T Gunji, H Hamagaki, R Hayano, T Isobe, F Kajihara, Y Morino, SX Oda, K Ozawa, S Sano, YL Yamaguchi, A Adare, AA Bickley, F Ellinghaus, A Glenn, E Kinney, K Kiriluk, Levy LA Linden, JL Nagle, CA Rosen, J Seele, M Wysocki, CY Chi, BA Cole, T Engelmore, N Grau, J Hanks, W Holzmann, J Jin, A Kravitz, YS Lai, E Mannel, F Matathias, E Vazquez-Zambrano, D Winter, WA Zajc, A Král, T Liška, M Virius, H Pereira, C Silvestre, P Tarján, R Vértesi, M Csanád, MI Nagy, KI Hahn, J Lee, IH Park, G Baksay, L Baksay, M Hohlmann, K Das, S Edwards, AD Frawley, X He, H Qu, J Ying, K Homma, T Horaguchi, KM Kijima, Y Nakamiya, T Nakamura, M Ouchida, K Shigaki, T Sugitate, H Torii, Y Tsuchimoto, D Watanabe, K Yamaura, V Babintsev, V Bumazhnov, A Denisov, A Durum, I Shein, A Yanovich, Perdekamp M Grosse, YJ Kim, J Koster, B Meredith, JC Peng, R Seidl, A Veicht, R Yang, P Ružička, L Tomášek, None, Azimuthal anisotropy of π0 production in Au+Au collisions at √sNN=200GeV: Path-length dependence of jet quenching and the role of initial geometry Physical Review Letters. ,vol. 105, pp. 142301- ,(2010) , 10.1103/PHYSREVLETT.105.142301
Berndt Müller, Phenomenology of jet quenching in heavy ion collisions Physical Review C. ,vol. 67, pp. 061901- ,(2003) , 10.1103/PHYSREVC.67.061901
Rainer J. Fries, Berndt Müller, Dinesh K. Srivastava, High-energy photons from passage of jets through Quark-Gluon plasma. Physical Review Letters. ,vol. 90, pp. 132301- ,(2003) , 10.1103/PHYSREVLETT.90.132301