Loop Corrections to Heavy-to-Light Form Factors and Evanescent Operators in SCET.

Becher, T. ; Hill, R. J.

Technical Information Center Oak Ridge Tennessee

关键词: Form factors;    Radiative corrections;    Matrix elements;    Mesons;   

RP-ID  :  DE2004833022

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

One-loop matching corrections are calculated for Soft-Collinear Effective Theory (SCET) operators relevant to the analysis of heavy-to-light meson form factors at large recoil. The numerical impact of radiative corrections on form factor predictions is assessed. Evanescent operators in the effective theory are studied and it is shown that even in problems of the Sudakov type, these operators can be renormalized to have vanishing matrix elements.