Parity-Violating Moller Scattering at Next-to-Next-to-Leading Order: Closed Fermion Loops

被引：8

作者：

Du, Yong ^{[1
]}

Freitas, Ayres ^{[2
]}

Patel, Hiren H. ^{[3
,4
]}

Ramsey-Musolf, Michael J. ^{[1
,5
,6
,7
]}

机构：

[1] Univ Massachusetts, Amherst Ctr Fundamental Interact, Phys Dept, Amherst, MA 01003 USA

[2] Univ Pittsburgh, Pittsburgh Particle Phys Astrophys & Cosmol Ctr P, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[3] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[4] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA

[5] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China

[6] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China

[7] CALTECH, Kellogg Radiat Lab, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 13期

基金：

美国国家科学基金会;

关键词：

ELECTROWEAK CORRECTIONS; DIAGRAMS; ASYMMETRIES; REDUCTION; INTEGRALS; MASSES; MODEL;

D O I：

10.1103/PhysRevLett.126.131801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A complete, gauge-invariant computation of two-loop virtual corrections involving closed fermion loops to the polarized Moller scattering asymmetry is presented. The set of contributions involving two closed fermion loops and the set involving one closed fermion loop are numerically similar in magnitude to the one-loop bosonic corrections and yield an overall correction of 1.3% relative to the tree level asymmetry. We estimate sizes of the remaining two-loop contributions and discuss implications for the upcoming MOLLER (Measurement of a Lepton-Lepton Electroweak Reaction) experiment.

引用

页数：6

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