Factorization and effective theories

被引：12

作者：

Aglietti, U ^{[1
]}

Corbo, G ^{[1
]}

机构：

[1] Univ Rome La Sapienza, Dipartimento Fis, INFN, Sez Roma 1, I-00185 Rome, Italy

来源：

PHYSICS LETTERS B | 1998年 / 431卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(98)00562-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We prove factorization in the decay B --> D(*) + jet using the Large Energy Effective Theory. The proof is non perturbative, does not require any gauge fixing and is exact in the limit of a very narrow jet. On the other band, it is shown that the Large Energy Effective Theory is unable to consistently describe completely exclusive processes such as for example B --> D(*) + pi due to an oversimplification of transverse momentum dynamics. Therefore we present a variant of the Large Energy Effective Theory, i.e. a new effective theory for massless particles which properly takes into account transverse degrees of freedom and is the natural framework to study exclusive non-leptonic decays. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：166 / 172

页数：7

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