J/ψ production in √sNN=200 GeV Cu+Cu collisions

被引：110
|
作者：
Adare, A. [1 ]
Afanasiev, S.
Aidala, C.
Ajitanand, N. N.
Akiba, Y.
Al-Bataineh, H.
Alexander, J.
Aoki, K.
Aphecetche, L.
Armendariz, R.
Aronson, S. H.
Asai, J.
Atomssa, E. T.
Averbeck, R.
Awes, T. C.
Azmoun, B.
Babintsev, V.
Baksay, G.
Baksay, L.
Baldisseri, A.
Barish, K. N.
Barnes, P. D.
Bassalleck, B.
Bathe, S.
Batsouli, S.
Baublis, V.
Bazilevsky, A.
Belikov, S.
Bennett, R.
Berdnikov, Y.
Bickley, A. A. [1 ]
Boissevain, J. G.
Borel, H.
Boyle, K.
Brooks, M. L.
Buesching, H.
Bumazhnov, V.
Bunce, G.
Butsyk, S.
Campbell, S.
Chang, B. S.
Charvet, J. -L.
Chernichenko, S.
Chiba, J.
Chi, C. Y.
Chiu, M.
Choi, I. J.
Chujo, T.
Chung, P.
Churyn, A.
机构：
[1] Univ Colorado, Boulder, CO 80309 USA
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 12期
基金：
巴西圣保罗研究基金会;
关键词：
D O I：
10.1103/PhysRevLett.101.122301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Yields for J/psi production in Cu+Cu collisions at root s(NN) = 200 GeV have been measured over the rapidity range |y|< 2.2 and compared with results in p+p and Au+Au collisions at the same energy. The Cu+Cu data offer greatly improved precision over existing Au+Au data for J/psi production in collisions with small to intermediate numbers of participants, in the range where the quark-gluon plasma transition threshold is predicted to lie. Cold nuclear matter estimates based on ad hoc fits to d+Au data describe the Cu+Cu data up to N-part similar to 50, corresponding to a Bjorken energy density of at least 1.5 GeV/fm(3).
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