New Parity-Violating Muonic Forces and the Proton Charge Radius

被引：106

作者：

Batell, Brian ^{[1
]}

McKeen, David ^{[2
]}

Pospelov, Maxim ^{[1
,2
]}

机构：

[1] Perimeter Inst Theoret Phys, Waterloo, ON N2J 2W9, Canada

[2] Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 01期

关键词：

G-2;

D O I：

10.1103/PhysRevLett.107.011803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The recent discrepancy between proton charge radius measurements extracted from electron-proton versus muon-proton systems is suggestive of a new force that differentiates between lepton species. We identify a class of models with gauged right-handed muon number, which contains new vector and scalar force carriers at the similar to 100 MeV scale or lighter, that is consistent with observations. Such forces would lead to an enhancement by several orders-of-magnitude of the parity-violating asymmetries in the scattering of low-energy muons on nuclei. The relatively large size of such asymmetries, O(10(-4)), opens up the possibility for new tests of parity violation in neutral currents with existing low-energy muon beams.

引用

页数：4

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