迈向粲偶素产生争议的解决方案：横向动量因子分解与色八重态机制
Towards a solution of the charmonium production controversy: k( perpendicular) factorization versus color-octet mechanism.
作者信息
Hägler P, Kirschner R, Schäfer A, Szymanowski L, Teryaev O V
机构信息
Institut für Theoretische Physik, Universität Regensburg, Germany.
出版信息
Phys Rev Lett. 2001 Feb 19;86(8):1446-9. doi: 10.1103/PhysRevLett.86.1446.
The cross section of chi(cJ) hadroproduction is calculated in the k( perpendicular)-factorization approach. We find a significant contribution of the chi(c1) state due to non-applicability of the Landau-Yang theorem because of off-shell gluons. The results are in agreement with data and, in contrast to the collinear factorization, show a dominance of the color-singlet part and a strong suppression of the color octet contribution. Our results could therefore lead to a solution of the long-standing controversy between the color-singlet model and the color-octet mechanism.
采用横向动量（k⊥）因子化方法计算了粲偶素（χcJ）强子产生的截面。由于离壳胶子导致朗道-杨定理不适用，我们发现χc1态有显著贡献。结果与数据相符，并且与共线因子化不同，显示出颜色单态部分占主导，颜色八重态贡献受到强烈抑制。因此，我们的结果可能会解决颜色单态模型和颜色八重态机制之间长期存在的争议。
Zotero 插件