Soft-collinear factorization and zero-bin subtractions

被引：91

作者：

Chiu, Jui-yu ^{[1
]}

Fuhrer, Andreas ^{[1
]}

Hoang, Andre H. ^{[2
]}

Kelley, Randall ^{[1
]}

Manohar, Aneesh V. ^{[1
]}

机构：

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

[2] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany

来源：

PHYSICAL REVIEW D | 2009年 / 79卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.79.053007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the Sudakov form factor for a spontaneously broken gauge theory using a (new) Delta-regulator. To be well defined, the effective theory requires zero-bin subtractions for the collinear sectors. The zero-bin subtractions depend on the gauge boson mass M and are not scaleless. They have both finite and 1/epsilon contributions and are needed to give the correct anomalous dimension and low-scale matching contributions. We also demonstrate the necessity of zero-bin subtractions for soft-collinear factorization. We find that after zero-bin subtractions the form factor is the sum of the collinear contributions minus a soft mass-mode contribution, in agreement with a previous result of Idilbi and Mehen in QCD. This appears to conflict with the method-of-regions approach, where one gets the sum of contributions from different regions.

引用

页数：9

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