标题： T奇碎片函数的求和规则 显示英文标题

标题： Sum rules for the T-odd fragmentation functions

摘要： 在部分子碎片化过程中，固有横向动量的守恒对T-odd碎片化函数施加了非平凡的约束。 这些显著增强了 favoured 和 unfavoured 碎片化函数之间的差异，这可能有助于理解最近 HERMES 合作组观察到的带电介子产生的方位不对称性。 显示英文摘要

摘要： The conservation of the intrinsic transverse momentum during parton fragmentation imposes non-trivial constraints on T-odd fragmentation functions. These significantly enhance the differences between the favoured and unfavoured fragmentation functions, which could be relevant to understand the azimuthal asymmetries of charged pion production observed recently by the HERMES collaboration.