Nuclear modification factors for hadrons at forward and backward rapidities in deuteron-gold collisions at sqrt[s(NN)]=200 GeV

S S Adler; S Afanasiev; C Aidala; N N Ajitanand; Y Akiba; A Al-Jamel; J Alexander; K Aoki; L Aphecetche; R Armendariz; S H Aronson; R Averbeck; T C Awes; V Babintsev; A Baldisseri; K N Barish; P D Barnes; B Bassalleck; S Bathe; S Batsouli; V Baublis; F Bauer; A Bazilevsky; S Belikov; M T Bjorndal; J G Boissevain; H Borel; M L Brooks; D S Brown; N Bruner; D Bucher; H Buesching; V Bumazhnov; G Bunce; J M Burward-Hoy; S Butsyk; X Camard; P Chand; W C Chang; S Chernichenko; C Y Chi; J Chiba; M Chiu; I J Choi; R K Choudhury; T Chujo; V Cianciolo; Y Cobigo; B A Cole; M P Comets; P Constantin; M Csanád; T Csörgo; J P Cussonneau; D d'Enterria; K Das; G David; F Deák; H Delagrange; A Denisov; A Deshpande; E J Desmond; A Devismes; O Dietzsch; J L Drachenberg; O Drapier; A Drees; A Durum; D Dutta; V Dzhordzhadze; Y V Efremenko; H En'yo; B Espagnon; S Esumi; D E Fields; C Finck; F Fleuret; S L Fokin; B D Fox; Z Fraenkel; J E Frantz; A Franz; A D Frawley; Y Fukao; S-Y Fung; S Gadrat; M Germain; A Glenn; M Gonin; J Gosset; Y Goto; R Granier de Cassagnac; N Grau; S V Greene; M Grosse Perdekamp; H-A Gustafsson; T Hachiya; J S Haggerty; H Hamagaki; A G Hansen; E P Hartouni; M Harvey; K Hasuko; R Hayano; X He; M Heffner; T K Hemmick; J M Heuser; P Hidas; H Hiejima; J C Hill; R Hobbs; W Holzmann; K Homma; B Hong; A Hoover; T Horaguchi; T Ichihara; V V Ikonnikov; K Imai; M Inaba; M Inuzuka; D Isenhower; L Isenhower; M Ishihara; M Issah; A Isupov; B V Jacak; J Jia; O Jinnouchi; B M Johnson; S C Johnson; K S Joo; D Jouan; F Kajihara; S Kametani; N Kamihara; M Kaneta; J H Kang; K Katou; T Kawabata; A Kazantsev; S Kelly; B Khachaturov; A Khanzadeev; J Kikuchi; D J Kim; E Kim; G-B Kim; H J Kim; E Kinney; A Kiss; E Kistenev; A Kiyomichi; C Klein-Boesing; H Kobayashi; L Kochenda; V Kochetkov; R Kohara; B Komkov; M Konno; D Kotchetkov; A Kozlov; P J Kroon; C H Kuberg; G J Kunde; K Kurita; M J Kweon; Y Kwon; G S Kyle; R Lacey; J G Lajoie; Y Le Bornec; A Lebedev; S Leckey; D M Lee; M J Leitch; M A L Leite; X H Li; H Lim; A Litvinenko; M X Liu; C F Maguire; Y I Makdisi; A Malakhov; V I Manko; Y Mao; G Martinez; H Masui; F Matathias; T Matsumoto; M C McCain; P L McGaughey; Y Miake; T E Miller; A Milov; S Mioduszewski; G C Mishra; J T Mitchell; A K Mohanty; D P Morrison; J M Moss; D Mukhopadhyay; M Muniruzzaman; S Nagamiya; J L Nagle; T Nakamura; J Newby; A S Nyanin; J Nystrand; E O'Brien; C A Ogilvie; H Ohnishi; I D Ojha; H Okada; K Okada; A Oskarsson; I Otterlund; K Oyama; K Ozawa; D Pal; A P T Palounek; V Pantuev; V Papavassiliou; J Park; W J Park; S F Pate; H Pei; V Penev; J-C Peng; H Pereira; V Peresedov; A Pierson; C Pinkenburg; R P Pisani; M L Purschke; A K Purwar; J M Qualls; J Rak; I Ravinovich; K F Read; M Reuter; K Reygers; V Riabov; Y Riabov; G Roche; A Romana; M Rosati; S S E Rosendahl; P Rosnet; V L Rykov; S S Ryu; N Saito; T Sakaguchi; S Sakai; V Samsonov; L Sanfratello; R Santo; H D Sato; S Sato; S Sawada; Y Schutz; V Semenov; R Seto; T K Shea; I Shein; T-A Shibata; K Shigaki; M Shimomura; A Sickles; C L Silva; D Silvermyr; K S Sim; 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; S Takagi; E M Takagui; A Taketani; K H Tanaka; Y Tanaka; K Tanida; M J Tannenbaum; A Taranenko; P Tarján; T L Thomas; M Togawa; J Tojo; H Torii; R S Towell; V-N Tram; I Tserruya; Y Tsuchimoto; H Tydesjö; N Tyurin; T J Uam; H W van Hecke; J Velkovska; M Velkovsky; V Veszprémi; A A Vinogradov; M A Volkov; E Vznuzdaev; X R Wang; Y Watanabe; S N White; N Willis; F K Wohn; C L Woody; W Xie; A Yanovich; S Yokkaichi; G R Young; I E Yushmanov; W A Zajc; C Zhang; S Zhou; J Zimányi; L Zolin; X Zong; PHENIX Collaboration

doi:10.1103/PhysRevLett.94.082302

Nuclear modification factors for hadrons at forward and backward rapidities in deuteron-gold collisions at sqrt[s(NN)]=200 GeV

Phys Rev Lett. 2005 Mar 4;94(8):082302. doi: 10.1103/PhysRevLett.94.082302. Epub 2005 Mar 3.

Authors

S S Adler¹, S Afanasiev, C Aidala, N N Ajitanand, Y Akiba, A Al-Jamel, J Alexander, K Aoki, L Aphecetche, R Armendariz, S H Aronson, R Averbeck, T C Awes, V Babintsev, A Baldisseri, K N Barish, P D Barnes, B Bassalleck, S Bathe, S Batsouli, V Baublis, F Bauer, A Bazilevsky, S Belikov, M T Bjorndal, J G Boissevain, H Borel, M L Brooks, D S Brown, N Bruner, D Bucher, H Buesching, V Bumazhnov, G Bunce, J M Burward-Hoy, S Butsyk, X Camard, P Chand, W C Chang, S Chernichenko, C Y Chi, J Chiba, M Chiu, I J Choi, R K Choudhury, T Chujo, V Cianciolo, Y Cobigo, B A Cole, M P Comets, P Constantin, M Csanád, T Csörgo, J P Cussonneau, D d'Enterria, K Das, G David, F Deák, H Delagrange, A Denisov, A Deshpande, E J Desmond, A Devismes, O Dietzsch, J L Drachenberg, O Drapier, A Drees, A Durum, D Dutta, V Dzhordzhadze, Y V Efremenko, H En'yo, B Espagnon, S Esumi, D E Fields, C Finck, F Fleuret, S L Fokin, B D Fox, Z Fraenkel, J E Frantz, A Franz, A D Frawley, Y Fukao, S-Y Fung, S Gadrat, M Germain, A Glenn, M Gonin, J Gosset, Y Goto, R Granier de Cassagnac, N Grau, S V Greene, M Grosse Perdekamp, H-A Gustafsson, T Hachiya, J S Haggerty, H Hamagaki, A G Hansen, E P Hartouni, M Harvey, K Hasuko, R Hayano, X He, M Heffner, T K Hemmick, J M Heuser, P Hidas, H Hiejima, J C Hill, R Hobbs, W Holzmann, K Homma, B Hong, A Hoover, T Horaguchi, T Ichihara, V V Ikonnikov, K Imai, M Inaba, M Inuzuka, D Isenhower, L Isenhower, M Ishihara, M Issah, A Isupov, B V Jacak, J Jia, O Jinnouchi, B M Johnson, S C Johnson, K S Joo, D Jouan, F Kajihara, S Kametani, N Kamihara, M Kaneta, J H Kang, K Katou, T Kawabata, A Kazantsev, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, D J Kim, E Kim, G-B Kim, H J Kim, E Kinney, A Kiss, E Kistenev, A Kiyomichi, C Klein-Boesing, H Kobayashi, L Kochenda, V Kochetkov, R Kohara, B Komkov, M Konno, D Kotchetkov, A Kozlov, P J Kroon, C H Kuberg, G J Kunde, K Kurita, M J Kweon, Y Kwon, G S Kyle, R Lacey, J G Lajoie, Y Le Bornec, A Lebedev, S Leckey, D M Lee, M J Leitch, M A L Leite, X H Li, H Lim, A Litvinenko, M X Liu, C F Maguire, Y I Makdisi, A Malakhov, V I Manko, Y Mao, G Martinez, H Masui, F Matathias, T Matsumoto, M C McCain, P L McGaughey, Y Miake, T E Miller, A Milov, S Mioduszewski, G C Mishra, J T Mitchell, A K Mohanty, D P Morrison, J M Moss, D Mukhopadhyay, M Muniruzzaman, S Nagamiya, J L Nagle, T Nakamura, J Newby, A S Nyanin, J Nystrand, E O'Brien, C A Ogilvie, H Ohnishi, I D Ojha, H Okada, K Okada, A Oskarsson, I Otterlund, K Oyama, K Ozawa, D Pal, A P T Palounek, V Pantuev, V Papavassiliou, J Park, W J Park, S F Pate, H Pei, V Penev, J-C Peng, H Pereira, V Peresedov, A Pierson, C Pinkenburg, R P Pisani, M L Purschke, A K Purwar, J M Qualls, J Rak, I Ravinovich, K F Read, M Reuter, K Reygers, V Riabov, Y Riabov, G Roche, A Romana, M Rosati, S S E Rosendahl, P Rosnet, V L Rykov, S S Ryu, N Saito, T Sakaguchi, S Sakai, V Samsonov, L Sanfratello, R Santo, H D Sato, S Sato, S Sawada, Y Schutz, V Semenov, R Seto, T K Shea, I Shein, T-A Shibata, K Shigaki, M Shimomura, A Sickles, C L Silva, D Silvermyr, K S Sim, 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, S Takagi, E M Takagui, A Taketani, K H Tanaka, Y Tanaka, K Tanida, M J Tannenbaum, A Taranenko, P Tarján, T L Thomas, M Togawa, J Tojo, H Torii, R S Towell, V-N Tram, I Tserruya, Y Tsuchimoto, H Tydesjö, N Tyurin, T J Uam, H W van Hecke, J Velkovska, M Velkovsky, V Veszprémi, A A Vinogradov, M A Volkov, E Vznuzdaev, X R Wang, Y Watanabe, S N White, N Willis, F K Wohn, C L Woody, W Xie, A Yanovich, S Yokkaichi, G R Young, I E Yushmanov, W A Zajc, C Zhang, S Zhou, J Zimányi, L Zolin, X Zong; PHENIX Collaboration

Affiliation

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

PMID: 15783879
DOI: 10.1103/PhysRevLett.94.082302

Abstract

We report on charged hadron production in deuteron-gold reactions at sqrt[s(NN)]=200 GeV. Our measurements in the deuteron direction cover 1.4<eta<2.2, referred to as forward rapidity, and in the gold direction -2.0<eta<-1.4, referred to as backward rapidity, and a transverse momentum range p(T)=0.5-4.0 GeV/c. We compare the relative yields for different deuteron-gold collision centrality classes. We observe a suppression relative to binary collision scaling at forward rapidity, sensitive to low momentum fraction (x) partons in the gold nucleus, and an enhancement at backward rapidity, sensitive to high momentum fraction partons in the gold nucleus.