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作者机构:Temple Univ Dept Phys Philadelphia PA 19122 USA Ruhr Univ Bochum Inst Theoret Phys 2 D-44780 Bochum Germany
出 版 物:《PHYSICS LETTERS B》 (Phys Lett Sect B Nucl Elem Part High-Energy Phys)
年 卷 期:2010年第690卷第3期
页 面:296-303页
核心收录:
学科分类:07[理学] 0704[理学-天文学] 0702[理学-物理学]
基 金:BMBF NSF [PHY-0855501] Division Of Physics Direct For Mathematical & Physical Scien Funding Source: National Science Foundation
主 题:Transverse momentum dependent parton correlators Fragmentation functions Sum rules
摘 要:Momentum sum rules for fragmentation functions are considered. In particular, we give a general proof of the Schafer-Teryaev sum rule for the transverse momentum dependent Collins function. We also argue that corresponding sum rules for related fragmentation functions do not exist. Our model-independent analysis is supplemented by calculations in a simple field-theoretical model. (c) 2010 Elsevier B.V. All rights reserved.