Heavy quarks in deep-inelastic scattering
Heavy quarks in deep-inelastic scattering
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DOI：
10.1016/j.nuclphysb.2010.03.014
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发表时间：
2010-07-21
影响因子：
2.8
通讯作者：
Rojo, Juan
中科院分区：
文献类型：
--
作者：
Forte, Stefano;Laenen, Eric;Rojo, Juan
我们讨论了一个一般的框架，包括重夸克质量的贡献，深非弹性结构函数和它们的微扰匹配的结构函数计算的变质量计划。我们的方法是基于所谓的FONLL方法，以前介绍并应用于重夸克强子产生和光生。我们定义了我们的框架，提供表达式到二阶的强耦合，并使用它们来构建匹配的结构函数的表达式到NNLO。明确检查后，我们的结果的一致性，我们进行了研究的重夸克条款的现象学影响，并比较结果在各种微扰订单，并与各种处方的治疗subleading条款，特别是那些有关的阈值行为。我们还考虑了重夸克结构函数F-2c，并讨论了与其系数函数中质量奇异性的存在有关的问题。(C)2010爱思唯尔有限公司版权所有。
We discuss a general framework for the inclusion of heavy quark mass contributions to deep-inelastic structure functions and their perturbative matching to structure functions computed in variable-mass schemes. Our approach is based on the so-called FONLL method, previously introduced and applied to heavy quark hadroproduction and photoproduction. We define our framework, provide expressions up to second order in the strong coupling, and use them to construct matched expressions for structure functions up to NNLO. After checking explicitly the consistency of our results, we perform a study of the phenomenological impact of heavy quark terms, and compare results obtained at various perturbative orders, and with various prescriptions for the treatment of subleading terms, specifically those related to threshold behaviour. We also consider the heavy quark structure function F-2c and discuss issues related to the presence of mass singularities in their coefficient functions. (C) 2010 Elsevier B.V. All rights reserved.