Resonant leptogenesis in minimal U(1)X extensions of the Standard Model

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Physics Letters B Pub Date : 2025-03-17 DOI:10.1016/j.physletb.2025.139395

Arindam Das , Yuta Orikasa

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引用次数: 0

Abstract

We investigate a general

U {(1)}_{X}

scenario where we introduce three generations of Standard Model (SM) singlet Right Handed Neutrinos (RHNs) to generate the light neutrino mass through the seesaw mechanism after the breaking of

U {(1)}_{X}

and electroweak symmetries. In addition to that, a general

U {(1)}_{X}

scenario involves an SM-singlet scalar field and due to the

U {(1)}_{X}

symmetry breaking the mass of a neutral beyond the SM (BSM) gauge boson

Z^{'}

is evolved. The RHNs, charged under the

U {(1)}_{X}

scenario, can explain the origin of observed baryon asymmetry through the resonant leptogenesis process. Applying observed neutrino oscillation data we study

Z^{'}

and BSM scalar-induced processes to reproduce the observed baryon asymmetry. Hence we estimate bounds on the

U {(1)}_{X}

gauge coupling

(g_{X})

and the mass of the

Z^{'}

(M_{Z^{'}})

for different

U {(1)}_{X}

charges and benchmark masses of the RHN and SM-singlet scalar. Finally, we compare our results with limits obtained from the existing limits from LEP-II and LHC. We find that depending on the

U {(1)}_{X}

charges, the masses of RHNs and SM-singlet scalar resonant leptogenesis could provide a stronger limit on

g_{X}

for

M_{Z^{'}} > 5.8

TeV which could be probed by high energy scattering experiment in future.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.

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