Nuclear modification of electron spectra and implications for heavy quark energy loss in Au+Au collisions at [FORMULA: SEE TEXT]

S S Adler; S Afanasiev; C Aidala; N N Ajitanand; Y Akiba; J Alexander; R Amirikas; L Aphecetche; S H Aronson; R Averbeck; T C Awes; R Azmoun; V Babintsev; A Baldisseri; K N Barish; P D Barnes; B Bassalleck; S Bathe; S Batsouli; V Baublis; A Bazilevsky; S Belikov; Y Berdnikov; S Bhagavatula; J G Boissevain; H Borel; S Borenstein; M L Brooks; D S Brown; N Bruner; D Bucher; H Buesching; V Bumazhnov; G Bunce; J M Burward-Hoy; S Butsyk; X Camard; J-S Chai; P Chand; W C Chang; S Chernichenko; C Y Chi; J Chiba; M Chiu; I J Choi; J Choi; R K Choudhury; T Chujo; V Cianciolo; Y Cobigo; B A Cole; P Constantin; D d'Enterria; G David; H Delagrange; A Denisov; A Deshpande; E J Desmond; A Devismes; O Dietzsch; O Drapier; A Drees; R du Rietz; A Durum; D Dutta; Y V Efremenko; J Egdemir; K El Chenawi; A Enokizono; H En'yo; S Esumi; L Ewell; D E Fields; F Fleuret; S L Fokin; B D Fox; Z Fraenkel; J E Frantz; A Franz; A D Frawley; S-Y Fung; S Garpman; T K Ghosh; A Glenn; G Gogiberidze; M Gonin; J Gosset; Y Goto; R Granier de Cassagnac; N Grau; S V Greene; M Grosse Perdekamp; W Guryn; H-A Gustafsson; T Hachiya; J S Haggerty; H Hamagaki; A G Hansen; E P Hartouni; M Harvey; R Hayano; N Hayashi; X He; M Heffner; T K Hemmick; J M Heuser; M Hibino; J C Hill; W Holzmann; K Homma; B Hong; A Hoover; T Ichihara; V V Ikonnikov; K Imai; D Isenhower; M Ishihara; M Issah; A Isupov; B V Jacak; W Y Jang; Y Jeong; J Jia; O Jinnouchi; B M Johnson; S C Johnson; K S Joo; D Jouan; S Kametani; N Kamihara; J H Kang; S S Kapoor; K Katou; S Kelly; B Khachaturov; A Khanzadeev; J Kikuchi; D H Kim; D J Kim; D W Kim; E Kim; G-B Kim; H J Kim; E Kistenev; A Kiyomichi; K Kiyoyama; C Klein-Boesing; H Kobayashi; L Kochenda; V Kochetkov; D Koehler; T Kohama; M Kopytine; D Kotchetkov; A Kozlov; P J Kroon; C H Kuberg; K Kurita; Y Kuroki; M J Kweon; Y Kwon; G S Kyle; R Lacey; V Ladygin; J G Lajoie; A Lebedev; S Leckey; D M Lee; S Lee; M J Leitch; X H Li; H Lim; A Litvinenko; M X Liu; Y Liu; C F Maguire; Y I Makdisi; A Malakhov; V I Manko; Y Mao; G Martinez; M D Marx; H Masui; F Matathias; T Matsumoto; P L McGaughey; E Melnikov; F Messer; Y Miake; J Milan; T E Miller; A Milov; S Mioduszewski; R E Mischke; G C Mishra; J T Mitchell; A K Mohanty; D P Morrison; J M Moss; F Mühlbacher; D Mukhopadhyay; M Muniruzzaman; J Murata; S Nagamiya; J L Nagle; T Nakamura; B K Nandi; M Nara; J Newby; P Nilsson; A S Nyanin; J Nystrand; E O'Brien; C A Ogilvie; H Ohnishi; I D Ojha; K Okada; M Ono; V Onuchin; A Oskarsson; I Otterlund; K Oyama; K Ozawa; D Pal; A P T Palounek; V Pantuev; V Papavassiliou; J Park; A Parmar; S F Pate; T Peitzmann; J-C Peng; V Peresedov; C Pinkenburg; R P Pisani; F Plasil; M L Purschke; A K Purwar; J Rak; I Ravinovich; K F Read; M Reuter; K Reygers; V Riabov; Y Riabov; G Roche; A Romana; M Rosati; P Rosnet; S S Ryu; M E Sadler; N Saito; T Sakaguchi; M Sakai; S Sakai; V Samsonov; L Sanfratello; R Santo; H D Sato; S Sato; S Sawada; Y Schutz; V Semenov; R Seto; M R Shaw; T K Shea; T-A Shibata; K Shigaki; T Shiina; C L Silva; D Silvermyr; K S Sim; C P Singh; V Singh; M Sivertz; A Soldatov; R A Soltz; W E Sondheim; S P Sorensen; I V Sourikova; F Staley; P W Stankus; E Stenlund; M Stepanov; A Ster; S P Stoll; T Sugitate; J P Sullivan; E M Takagui; A Taketani; M Tamai; K H Tanaka; Y Tanaka; K Tanida; M J Tannenbaum; P Tarján; J D Tepe; T L Thomas; J Tojo; H Torii; R S Towell; I Tserruya; H Tsuruoka; S K Tuli; H Tydesjö; N Tyurin; H W van Hecke; J Velkovska; M Velkovsky; V Veszprémi; L Villatte; A A Vinogradov; M A Volkov; E Vznuzdaev; X R Wang; Y Watanabe; S N White; F K Wohn; C L Woody; W Xie; Y Yang; A Yanovich; S Yokkaichi; G R Young; I E Yushmanov; W A Zajc; C Zhang; S Zhou; S J Zhou; L Zolin; PHENIX Collaboration

doi:10.1103/PhysRevLett.96.032301

Nuclear modification of electron spectra and implications for heavy quark energy loss in Au+Au collisions at [FORMULA: SEE TEXT]

Phys Rev Lett. 2006 Jan 27;96(3):032301. doi: 10.1103/PhysRevLett.96.032301. Epub 2006 Jan 26.

Authors

S S Adler¹, S Afanasiev, C Aidala, N N Ajitanand, Y Akiba, J Alexander, R Amirikas, L Aphecetche, S H Aronson, R Averbeck, T C Awes, R Azmoun, V Babintsev, A Baldisseri, K N Barish, P D Barnes, B Bassalleck, S Bathe, S Batsouli, V Baublis, A Bazilevsky, S Belikov, Y Berdnikov, S Bhagavatula, J G Boissevain, H Borel, S Borenstein, M L Brooks, D S Brown, N Bruner, D Bucher, H Buesching, V Bumazhnov, G Bunce, J M Burward-Hoy, S Butsyk, X Camard, J-S Chai, P Chand, W C Chang, S Chernichenko, C Y Chi, J Chiba, M Chiu, I J Choi, J Choi, R K Choudhury, T Chujo, V Cianciolo, Y Cobigo, B A Cole, P Constantin, D d'Enterria, G David, H Delagrange, A Denisov, A Deshpande, E J Desmond, A Devismes, O Dietzsch, O Drapier, A Drees, R du Rietz, A Durum, D Dutta, Y V Efremenko, J Egdemir, K El Chenawi, A Enokizono, H En'yo, S Esumi, L Ewell, D E Fields, F Fleuret, S L Fokin, B D Fox, Z Fraenkel, J E Frantz, A Franz, A D Frawley, S-Y Fung, S Garpman, T K Ghosh, A Glenn, G Gogiberidze, M Gonin, J Gosset, Y Goto, R Granier de Cassagnac, N Grau, S V Greene, M Grosse Perdekamp, W Guryn, H-A Gustafsson, T Hachiya, J S Haggerty, H Hamagaki, A G Hansen, E P Hartouni, M Harvey, R Hayano, N Hayashi, X He, M Heffner, T K Hemmick, J M Heuser, M Hibino, J C Hill, W Holzmann, K Homma, B Hong, A Hoover, T Ichihara, V V Ikonnikov, K Imai, D Isenhower, M Ishihara, M Issah, A Isupov, B V Jacak, W Y Jang, Y Jeong, J Jia, O Jinnouchi, B M Johnson, S C Johnson, K S Joo, D Jouan, S Kametani, N Kamihara, J H Kang, S S Kapoor, K Katou, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, D H Kim, D J Kim, D W Kim, E Kim, G-B Kim, H J Kim, E Kistenev, A Kiyomichi, K Kiyoyama, C Klein-Boesing, H Kobayashi, L Kochenda, V Kochetkov, D Koehler, T Kohama, M Kopytine, D Kotchetkov, A Kozlov, P J Kroon, C H Kuberg, K Kurita, Y Kuroki, M J Kweon, Y Kwon, G S Kyle, R Lacey, V Ladygin, J G Lajoie, A Lebedev, S Leckey, D M Lee, S Lee, M J Leitch, X H Li, H Lim, A Litvinenko, M X Liu, Y Liu, C F Maguire, Y I Makdisi, A Malakhov, V I Manko, Y Mao, G Martinez, M D Marx, H Masui, F Matathias, T Matsumoto, P L McGaughey, E Melnikov, F Messer, Y Miake, J Milan, T E Miller, A Milov, S Mioduszewski, R E Mischke, G C Mishra, J T Mitchell, A K Mohanty, D P Morrison, J M Moss, F Mühlbacher, D Mukhopadhyay, M Muniruzzaman, J Murata, S Nagamiya, J L Nagle, T Nakamura, B K Nandi, M Nara, J Newby, P Nilsson, A S Nyanin, J Nystrand, E O'Brien, C A Ogilvie, H Ohnishi, I D Ojha, K Okada, M Ono, V Onuchin, A Oskarsson, I Otterlund, K Oyama, K Ozawa, D Pal, A P T Palounek, V Pantuev, V Papavassiliou, J Park, A Parmar, S F Pate, T Peitzmann, J-C Peng, V Peresedov, C Pinkenburg, R P Pisani, F Plasil, M L Purschke, A K Purwar, J Rak, I Ravinovich, K F Read, M Reuter, K Reygers, V Riabov, Y Riabov, G Roche, A Romana, M Rosati, P Rosnet, S S Ryu, M E Sadler, N Saito, T Sakaguchi, M Sakai, S Sakai, V Samsonov, L Sanfratello, R Santo, H D Sato, S Sato, S Sawada, Y Schutz, V Semenov, R Seto, M R Shaw, T K Shea, T-A Shibata, K Shigaki, T Shiina, C L Silva, D Silvermyr, K S Sim, C P Singh, V Singh, M Sivertz, A Soldatov, R A Soltz, W E Sondheim, S P Sorensen, I V Sourikova, F Staley, P W Stankus, E Stenlund, M Stepanov, A Ster, S P Stoll, T Sugitate, J P Sullivan, E M Takagui, A Taketani, M Tamai, K H Tanaka, Y Tanaka, K Tanida, M J Tannenbaum, P Tarján, J D Tepe, T L Thomas, J Tojo, H Torii, R S Towell, I Tserruya, H Tsuruoka, S K Tuli, H Tydesjö, N Tyurin, H W van Hecke, J Velkovska, M Velkovsky, V Veszprémi, L Villatte, A A Vinogradov, M A Volkov, E Vznuzdaev, X R Wang, Y Watanabe, S N White, F K Wohn, C L Woody, W Xie, Y Yang, A Yanovich, S Yokkaichi, G R Young, I E Yushmanov, W A Zajc, C Zhang, S Zhou, S J Zhou, L Zolin; PHENIX Collaboration

Affiliation

¹ Brookhaven National Laboratory, Upton, New York 11973-5000, USA.

PMID: 16486687
DOI: 10.1103/PhysRevLett.96.032301

Abstract

The PHENIX experiment has measured midrapidity ([FORMULA: SEE TEXT]) transverse momentum spectra ([FORMULA: SEE TEXT]) of electrons as a function of centrality in Au+Au collisions at [FORMULA: SEE TEXT]. Contributions from photon conversions and from light hadron decays, mainly Dalitz decays of pi0 and eta mesons, were removed. The resulting nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons carrying heavy quarks. Nuclear modification factors were determined by comparison to nonphotonic electrons in p+p collisions. A significant suppression of electrons at high pT is observed in central Au+Au collisions, indicating substantial energy loss of heavy quarks.