标题： D维空间中短距离处的静态杂化势 显示英文标题

标题： The static hybrid potential in D dimensions at short distances

摘要： 我们计算静态杂化态的能量，即在短距离下D=4、3维空间中静态夸克和反夸克的杂化夸克胶子态的能量。该能量的软贡献是短距离下色八重态夸克-反夸克对的静态势，对于任意D，该势已在两环近似下被确定。我们采用热场论方法验证了这个表达式。利用有效场论pNRQCD，我们在两环近似下计算了杂化态（以及单态）静态能量的超软贡献。然后我们给出了三维和四维空间中静态杂化态能量/势以及杂化态衰变宽度的新结果。最后我们评论了在两维时空空间中微扰结果的意义，在那里杂化态不存在。 显示英文摘要

摘要： We compute the energy of a static hybrid, i.e. of a hybrid quarkonium with static quark and antiquark, at short distances in D=4,3 dimensions. The soft contribution to this energy is the static potential of a color octet quark-antiquark pair at short distances, which is known at two loops for arbitrary D. We have checked this expression employing thermal field theory methods. Using the effective field theory pNRQCD we calculate the ultrasoft contributions to the hybrid (and singlet) static energy at the two-loop level. We then present new results for the static hybrid energy/potential and the hybrid decay width in three and four dimensions. Finally we comment on the meaning of the perturbative results in two space-time dimensions, where the hybrid does not exist.