X(1835):Skyrme模型中的质子-反质子束缚态(英文)

X(1835) as Proton-Antiproton Bound State in Skyrme Model

BES(北京谱仪)发现了奇特粒子态X(1835)．述评近年来把X(1835)解释为Skyrme模型中的N(N|-)-重子偶素的工作．有2个证据支持这种解释:1)存在N(N|-)-经典Skyrmion解,其结合能为-10MeV;2)这种Skyrmion-重子偶素的衰变是由X(1835)中的p-(p|-)经由量子隧穿而湮没所引起的,因此最可几的衰变道是X(1835)→η4π或X(1835)→η′2π．这些导致了对BES实验数据的合理解释,特别是关于X(1835)最可几的衰变模式的预言．该预言对实验有价值．

We present a review of the recent work related to interpreting the exotic particle X（1835） reported by BES as a N（-N）-baryonium in the Skyrme model. There are two evidences that support this interpretation： 1）There exists a classical N（-N）-Skyrmion solution with about ～ 10MeV binding energy in the model; 2） The decay of this Skymion-baryonium is caused by annihilation of p-（^-p） inside X（1835） through the quantum tunneling effect,and hence the most favorable decay channels are X→η4π or X→η＇2π. These lead to reasonable interpreting the data of BES, and especially to useful prediction on the decay mode of X（1835） for the experiment.