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

• Published in: Physical review letters Vol. 89; no. 9; p. 092302
• Main Authors: Adcox, K, Adler, S S, Ajitanand, N N, Akiba, Y, Alexander, J, Aphecetche, L, Arai, Y, Aronson, S H, Averbeck, R, Awes, T C, Barish, K N, Barnes, P D, Barrette, J, Bassalleck, B, Bathe, S, Baublis, V, Bazilevsky, A, Belikov, S, Bellaiche, F G, Belyaev, S T, Bennett, M J, Berdnikov, Y, Botelho, S, Brooks, M L, Brown, D S, Bruner, N, Bucher, D, Buesching, H, Bumazhnov, V, Bunce, G, Burward-Hoy, J, Butsyk, S, Carey, T A, Chand, P, Chang, J, Chang, W C, Chavez, L L, Chernichenko, S, Chi, C Y, Chiba, J, Chiu, M, Choudhury, R K, Christ, T, Chujo, T, Chung, M S, Chung, P, Cianciolo, V, Cole, B A, D'Enterria, D G, David, G, Delagrange, H, Denisov, A, Deshpande, A, Desmond, E J, Dietzsch, O, Dinesh, B V, Drees, A, Durum, A, Dutta, D, Ebisu, K, Efremenko, Y V, el-Chenawi, K, En'yo, H, Esumi, S, Ewell, L, Ferdousi, T, Fields, D E, Fokin, S L, Fraenkel, Z, Franz, A, Frawley, A D, Fung, S-Y, Garpman, S, Ghosh, T K, Glenn, A, Godoi, A L, Goto, Y, Greene, S V, Grosse Perdekamp, M, Gupta, S K, Guryn, W, Gustafsson, H-A, Haggerty, J S, Hamagaki, H, Hansen, A G, Hara, H, Hartouni, E P, Hayano, R, Hayashi, N, He, X, Hemmick, T K, Heuser, J M, Hibino, M, Hill, J C, Ho, D S, Homma, K, Hong, B, Hoover, A, Ichihara, T, Imai, K
• Format: Journal Article
• Language: English
• Published: United States 26-08-2002
• ISSN: 0031-9007

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.