Long-lived heavy neutrinos from Higgs decays

被引：71

作者：

Deppisch, Frank F. ^{[1
]}

Liu, Wei ^{[1
]}

Mitra, Manimala ^{[2
,3
]}

机构：

[1] UCL, Gower St, London WC1E 6BT, England

[2] Inst Phys, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India

[3] Homi Bhabha Natl Inst, Training Sch Complex, Bombay 400085, Maharashtra, India

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 08期

关键词：

Beyond Standard Model; Neutrino Physics; Higgs Physics; MAJORANA NEUTRINOS; SEARCH;

D O I：

10.1007/JHEP08(2018)181

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We investigate the pair-production of right-handed neutrinos via the Standard Model (SM) Higgs boson in a gauged B - L model. The right-handed neutrinos with a mass of few tens of GeV generating viable light neutrino masses via the seesaw mechanism naturally exhibit displaced vertices and distinctive signatures at the LHC and proposed lepton colliders. The production rate of the right-handed neutrinos depends on the mixing between the SM Higgs and the exotic Higgs associated with the B - L breaking, whereas their decay length depends on the active-sterile neutrino mixing. We focus on the displaced leptonic final states arising from such a process, and analyze the sensitivity reach of the LHC and proposed lepton colliders in probing the active-sterile neutrino mixing. We show that mixing to muons as small as V-mu N approximate to 10(-7) can be probed at the LHC with 100 fb(-1) and at proposed lepton colliders with 5000 fb(-1) . The future high luminosity run at LHC and the proposed MATHUSLA detector may further improve this reach by an order of magnitude.

引用

页数：24

共 57 条

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