Reparameterization invariance for collinear operators

被引：135

作者：

Manohar, AV ^{[1
]}

Mehen, T

Pirjol, D

Stewart, IW

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Duke Univ, Dept Phys, Durham, NC 27708 USA

[3] Jefferson Lab, Newport News, VA 23606 USA

[4] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

来源：

PHYSICS LETTERS B | 2002年 / 539卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(02)02029-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss restrictions on operators in the soft-collinear effective theory (SCET) which follow from the ambiguity in the decomposition of collinear momenta and the freedom in the choice of light-like basis vectors n and (n) over bar. Invariance of SCET under small changes in n and/or (n) over bar implies a symmetry of the effective theory that constrains the form of allowed operators with collinear fields. The restrictions occur at a given order in the power counting as well as between different orders. As an example, we present the complete set of higher order operators that are related to the collinear quark kinetic term. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：59 / 66

页数：8

共 13 条

[1]

Bauer CW, 2001, PHYS REV D, V64, DOI 10.1103/PhysRevD.64.114014

[2] Proof of factorization for B→Dπ -: art. no. 201806 [J].

Bauer, CW ;

Pirjol, D ;

Stewart, IW .

PHYSICAL REVIEW LETTERS, 2001, 87 (20) :201806-1

[3] Soft-collinear factorization in effective field theory [J].

Bauer, CW ;

Pirjol, D ;

Stewart, FW .

PHYSICAL REVIEW D, 2002, 65 (05) :17

[4] Invariant operators in collinear effective theory [J].

Bauer, CW ;

Stewart, IW .

PHYSICS LETTERS B, 2001, 516 (1-2) :134-142

[5] Summing Sudakov logarithms in B→Xsγ in effective field theory -: art. no. 014006 [J].

Bauer, CW ;

Fleming, S ;

Luke, M .

PHYSICAL REVIEW D, 2001, 63 (01) :13

[6]

BAUER CW, HEPPH0202088

[7]

CAMPANARIO F, HEPPH0201136

[8]

CHAY J, HEPPH0201197

[9] ON THE REPARAMETERIZATION INVARIANCE IN HEAVY-QUARK EFFECTIVE THEORY [J].

CHEN, YQ .

PHYSICS LETTERS B, 1993, 317 (03) :421-427

[10] Reparametrization invariance reexamined [J].

Finkemeier, M ;

Georgi, H ;

McIrvin, M .

PHYSICAL REVIEW D, 1997, 55 (11) :6933-6943

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