Article

Measurement of Lambda and Lambda(macro) particles in Au+Au collisions at the square root of S(NN) = 130 GeV.

K Adcox, S S Adler, N N Ajitanand, Y Akiba, J Alexander, L Aphecetche, Y Arai, S H Aronson, R Averbeck, T C Awes, K N Barish, P D Barnes, J Barrette, B Bassalleck, S Bathe, V Baublis, A Bazilevsky, S Belikov, F G Bellaiche, S T Belyaev, M J Bennett, Y Berdnikov, S Botelho, M L Brooks, D S Brown, N Bruner, D Bucher, H Buesching, V Bumazhnov, G Bunce, J Burward-Hoy, S Butsyk, T A Carey, P Chand, J Chang, W C Chang, L L Chavez, S Chernichenko, C Y Chi, J Chiba, M Chiu, R K Choudhury, T Christ, T Chujo, M S Chung, P Chung, V Cianciolo, B A Cole, D G D'Enterria, G David, H Delagrange, A Denisov, A Deshpande, E J Desmond, O Dietzsch, B V Dinesh, A Drees, A Durum, D Dutta, K Ebisu, Y V Efremenko, K el-Chenawi, H En'yo, S Esumi, L Ewell, T Ferdousi, D E Fields, S L Fokin, Z Fraenkel, A Franz, A D Frawley, S-Y Fung, S Garpman, T K Ghosh, A Glenn, A L Godoi, Y Goto, S V Greene, M Grosse Perdekamp, S K Gupta, W Guryn, H-A Gustafsson, J S Haggerty, H Hamagaki, A G Hansen, H Hara, E P Hartouni, R Hayano, N Hayashi, X He, T K Hemmick, J M Heuser, M Hibino, J C Hill, D S Ho, K Homma, B Hong, A Hoover, T Ichihara, K Imai, M S Ippolitov, M Ishihara, B V Jacak, W Y Jang, J Jia, B M Johnson, S C Johnson, K S Joo, S Kametani, J H Kang, M Kann, S S Kapoor, S Kelly, B Khachaturov, A Khanzadeev, J Kikuchi, D J Kim, H J Kim, S Y Kim, Y G Kim, W W Kinnison, E Kistenev, A Kiyomichi, C Klein-Boesing, S Klinksiek, L Kochenda, V Kochetkov, D Koehler, T Kohama, D Kotchetkov, A Kozlov, P J Kroon, K Kurita, M J Kweon, Y Kwon, G S Kyle, R Lacey, J G Lajoie, J Lauret, A Lebedev, D M Lee, M J Leitch, X H Li, Z Li, D J Lim, M X Liu, X Liu, Z Liu, C F Maguire, J Mahon, Y I Makdisi, V I Manko, Y Mao, S K Mark, S Markacs, G Martinez, M D Marx, A Masaike, F Matathias, T Matsumoto, P L McGaughey, E Melnikov, M Merschmeyer, F Messer, M Messer, Y Miake, 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, Y Nagasaka, J L Nagle, Y Nakada, B K Nandi, J Newby, L Nikkinen, P Nilsson, S Nishimura, A S Nyanin, J Nystrand, E O'Brien, C A Ogilvie, H Ohnishi, I D Ojha, M Ono, V Onuchin, A Oskarsson, L Osterman, I Otterlund, K Oyama, L Paffrath, D Pal, A P T Palounek, V S Pantuev, V Papavassiliou, S F Pate, T Peitzmann, A N Petridis, C Pinkenburg, R P Pisani, P Pitukhin, F Plasil, M Pollack, K Pope, M L Purschke, I Ravinovich, K F Read, K Reygers, V Riabov, Y Riabov, M Rosati, A A Rose, S S Ryu, N Saito, A Sakaguchi, T Sakaguchi, H Sako, T Sakuma, V Samsonov, T C Sangster, R Santo, H D Sato, S Sato, S Sawada, B R Schlei, Y Schutz, V Semenov, R Seto, T K Shea, I Shein, T-A Shibata, K Shigaki, T Shiina, Y H Shin, I G Sibiriak, D Silvermyr, K S Sim, J Simon-Gillo, C P Singh, V Singh, M Sivertz, A Soldatov, R A Soltz, S Sorensen, P W Stankus, N Starinsky, P Steinberg, E Stenlund, A Ster, S P Stoll, M Sugioka, T Sugitate, J P Sullivan, Y Sumi, Z Sun, M Suzuki, E M Takagui, A Taketani, M Tamai, K H Tanaka, Y Tanaka, E Taniguchi, M J Tannenbaum, J Thomas, J H Thomas, T L Thomas, W Tian, J Tojo, H Torii, R S Towell, I Tserruya, H Tsuruoka, A A Tsvetkov, S K Tuli, H Tydesjö, N Tyurin, T Ushiroda, H W Van Hecke, C Velissaris, J Velkovska, M Velkovsky, A A Vinogradov, M A Volkov, A Vorobyov, E Vznuzdaev, H Wang, Y Watanabe, S N White, C Witzig, F K Wohn, C L Woody, W Xie, K Yagi, S Yokkaichi, G R Young, I E Yushmanov, W A Zajc, Z Zhang, S Zhou

Vanderbilt University, Nashville, Tennessee 37235.
Physical Review Letters (impact factor: 7.37). 09/2002; 89(9):092302. pp.092302
Source: PubMed

ABSTRACT We present results on the measurement of Lambda and Lambda(macro) production in Au+Au collisions at square root of (S (NN) = 130 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider. The transverse momentum spectra were measured for minimum bias and for the 5% most central events. The Lambda;/Lambda ratios are constant as a function of p(T) and the number of participants. The measured net Lambda density is significantly larger than predicted by models based on hadronic strings (e.g., HIJING) but in approximate agreement with models which include the gluon-junction mechanism.

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Keywords

Au+Au collisions
 
central events
 
gluon-junction mechanism
 
measured net Lambda density
 
NN
 
PHENIX detector
 
Relativistic Heavy Ion Collider
 
transverse momentum spectra