Theoretical Constraints on Neutron-Mirror-Neutron Oscillation

被引：10

作者：

Babu, Kaladi S. ^{[1
]}

Mohapatra, Rabindra N. ^{[2
]}

机构：

[1] Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA

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

来源：

SYMMETRY-BASEL | 2022年 / 14卷 / 04期

关键词：

neutron; mirror neutron; oscillations; asymmetric inflation; HIGGS-BOSON; DARK-MATTER; NUCLEOSYNTHESIS; NEUTRINOS; SYMMETRY; SEARCH; MODELS; WORLD; U(1)S;

D O I：

10.3390/sym14040731

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Mirror models lead to the possibility that neutron (n) can oscillate into its mirror partner (n'), inspiring several experimental searches for this phenomenon. The condition for observability of this oscillation is a high degree of degeneracy between the n and n' masses, which can be guaranteed if there is exact parity symmetry taking all particles to their mirror partners. However, consistency of these models with big-bang nucleosynthesis requires that this parity symmetry be broken in the early universe in a scenario called asymmetric inflation. In this paper, we study the consistency of an observable n - n' oscillations signal with asymmetric inflation and derive various theoretical constraints. In particular, we find that the reheat temperature after inflation should lie below 2.5 TeV, and we predict a singlet fermion with a mass below 100 GeV. In simple models, where the right-handed neutrino is a mediator of baryon-number-violating interactions, we find that the light neutrinos are Dirac fermions with their masses arising radiatively through one-loop diagrams.

引用

页数：21

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