Flipped U(1) extended standard model and Majorana dark matter

Cao H. Nam

doi:10.1140/epjc/s10052-020-08694-1

2024 Impact factor 4.8

Particles and Fields

Open Access

Eur. Phys. J. C (2020) 80: 1114
https://doi.org/10.1140/epjc/s10052-020-08694-1

Regular Article – Theoretical Physics

Flipped U(1) extended standard model and Majorana dark matter

Cao H. Nam^a

Phenikaa Institute for Advanced Study and Faculty of Basic Science, Phenikaa University, To Huu, Yen Nghia, Ha Dong, 100000, Hanoi, Vietnam

^a nam.caohoang@phenikaa-uni.edu.vn

Received: 8 June 2020
Accepted: 20 November 2020
Published online: 3 December 2020

Abstract

We propose a general flavor-independent extension of the Standard Model (SM) with the minimal particle content, based on the symmetry $S U {(3)}_{C} \times S U {(2)}_{L} \times U {(1)}_{Y^{'}} \times U {(1)}_{X} \times Z_{2}$ $SU(3)_C\times SU(2)_L\times U(1)_{Y'}\times U(1)_X\times Z_2$ . In this scenario, the charge operator is identified in terms of the charges of two U(1) gauge symmetries. The light neutrino masses are generated via Type-I seesaw mechanism only with two heavy right-handed neutrinos acquiring their Majorana masses through the $U {(1)}_{Y^{'}} \times U {(1)}_{X}$ $U(1)_{Y'}\times U(1)_X$ symmetry breaking. We study various experimental constraints on the parameters of the model and investigate the phenomenology of the right-handed neutrino dark matter (DM) candidate assigned a $Z_{2}$ $$Z_2$$ -odd parity. We find that the most important constraints are the observed DM relic abundance, the current LHC limits, and the ambiguity of the SM neutral gauge boson mass.

© The Author(s) 2020

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