Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Korea.
Phys Rev Lett. 2011 May 27;106(21):212001. doi: 10.1103/PhysRevLett.106.212001. Epub 2011 May 24.
Identifying hadronic molecular states and/or hadrons with multiquark components either with or without exotic quantum numbers is a long-standing challenge in hadronic physics. We suggest that studying the production of these hadrons in relativistic heavy ion collisions offers a promising resolution to this problem as yields of exotic hadrons are expected to be strongly affected by their structures. Using the coalescence model for hadron production, we find that, compared to the case of a nonexotic hadron with normal quark numbers, the yield of an exotic hadron is typically an order of magnitude smaller when it is a compact multiquark state and a factor of 2 or more larger when it is a loosely bound hadronic molecule. We further find that some of the newly proposed heavy exotic states could be produced and realistically measured in these experiments.
识别具有多夸克成分的强子分子态和/或强子，无论是否具有奇异量子数，都是强子物理中的一个长期挑战。我们认为，研究相对论重离子碰撞中这些强子的产生为解决这个问题提供了一个有前途的途径，因为奇异强子的产率预计会受到它们结构的强烈影响。使用强子产生的合并模型，我们发现，与具有正常夸克数的非奇异强子相比，当奇异强子是紧凑的多夸克态时，其产率通常小一个数量级，而当它是松散束缚的强子分子时，其产率大 2 倍或更多。我们还发现，一些新提出的重奇异态可以在这些实验中产生并实际测量。
