Charmonium suppression in p A collisions -: art. no. 054906

被引:45
作者
Arleo, F [1 ]
Gossiaux, PB [1 ]
Gousset, T [1 ]
Aichelin, J [1 ]
机构
[1] Univ Nantes, Ecole Mines Nantes, IN2P3,CNRS,UMR 6457, SUBATECH,Lab Phys Subatom & Technol Associees, F-44070 Nantes 03, France
来源
PHYSICAL REVIEW C | 2000年 / 61卷 / 05期
关键词
D O I
10.1103/PhysRevC.61.054906
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
The new high precision data on charmonium production in proton-nucleus collisions by the E866/NuSea Collaboration at Fermilab allow us-together with older data at lower energies-to fix a unique set of parameters for the standard production and absorption scenario of charmonium in a proton-nucleus reaction. In this scenario the c (c) over bar pair is formed in an octet state, emits a gluon, and continues its radial expansion in a singlet state until it has reached the charmonium radius. In all three phases it can interact with the nuclear environment. We find that the lifetime of the octet state is much shorter than acceptable on physical grounds. This challenges the physical reality of the first phase in the standard scenario.
引用
收藏
页码:549061 / 549067
页数:7
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