Displaced photon signal from a possible light scalar in minimal left-right seesaw model

被引：37

作者：

Dev, P. S. Bhupal ^{[1
,2
]}

Mohapatra, Rabindra N. ^{[3
]}

Zhang, Yongchao ^{[4
]}

机构：

[1] Washington Univ, Dept Phys, St Louis, MO 63130 USA

[2] Washington Univ, McDonnell Ctr Space Sci, St Louis, MO 63130 USA

[3] Univ Maryland, Dept Phys, Maryland Ctr Fundamental Phys, College Pk, MD 20742 USA

[4] Univ Libre Bruxelles, Serv Phys Theor, Blvd Triomphe,CP225, B-1050 Brussels, Belgium

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 11期

基金：

美国国家科学基金会;

关键词：

HIGGS; MASS; SYMMETRY; SEARCH; NEUTRINOS; DECAY;

D O I：

10.1103/PhysRevD.95.115001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We point out that in the minimal left-right realization of TeV scale seesaw for neutrino masses, the neutral scalar from the right-handed SU(2)(R) breaking sector could be much lighter than the right-handed scale. We discuss for the first time the constraints on this particle from low-energy flavor observables and find that the light scalar is necessarily long-lived. We show that it can be searched for at the LHC via displaced signals of a collimated photon jet and can also be tested in current and future high-intensity experiments. In contrast to the unique diphoton signal (and associated jets) in the left-right case, a generic beyond-standard-model light scalar decays mostly to leptons or jets. Thus, the diphoton channel proposed here provides a new avenue to test the left-right framework and reveal the underlying neutrino mass generation mechanism.

引用

页数：9

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