Gauge B – L model with residual Z 3 symmetry

Ma, Ernest; Pollard, Nicholas; Srivastava, Rahul; Zakeri, Mohammadreza

doi:10.1016/j.physletb.2015.09.010

Title: Gauge $B – L$ model with residual $Z_{3}$ symmetry

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Abstract

We study a gauge B–L extension of the standard model of quarks and leptons with unconventional charges for the singlet right-handed neutrinos, and extra singlet scalars, such that a residual Z₃ symmetry remains after the spontaneous breaking of B–L. The phenomenological consequences of this scenario, including the possibility of long-lived self-interacting dark matter and Z' collider signatures is discussed. Lepton number L is a familiar concept. It is usually defined as a global U (1) symmetry, under which the leptons of the standard model (SM), i.e. e,μ,τ together with their neutrinos ν_e,ν_μ,ν_τ have L=1, and all other SM particles have L=0. In the case of nonzero Majorana neutrino masses, this continuous symmetry is broken to a discrete Z₂symmetry, i.e. (-1)^L or lepton parity. In this paper, we consider a gauge B–L extension of the SM, such that a residual Z₃ symmetry remains after the spontaneous breaking of B–L. This is then a realization of the unusual notion of Z₃ lepton symmetry. It has specific phenomenological consequences, including the possibility of a long-lived particle as a dark-matter candidate.

Authors:

Ma, Ernest; Pollard, Nicholas; Srivastava, Rahul;

Publication Date:: 2015-11-01

Research Org.:: Univ. of California, Riverside, CA (United States). Dept. of Physics and Astronomy

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1214243

Alternate Identifier(s):: OSTI ID: 1241140

Grant/Contract Number:: SC0008541

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 750 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

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                    Ma, Ernest, Pollard, Nicholas, Srivastava, Rahul, and Zakeri, Mohammadreza. Gauge B – L model with residual Z 3 symmetry.  Netherlands: N. p., 2015. 
Web.  doi:10.1016/j.physletb.2015.09.010.

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                    Ma, Ernest, Pollard, Nicholas, Srivastava, Rahul, & Zakeri, Mohammadreza. Gauge B – L model with residual Z 3 symmetry.  Netherlands.  https://doi.org/10.1016/j.physletb.2015.09.010

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                    Ma, Ernest, Pollard, Nicholas, Srivastava, Rahul, and Zakeri, Mohammadreza. Sun .  
"Gauge B – L model with residual Z 3 symmetry".  Netherlands.  https://doi.org/10.1016/j.physletb.2015.09.010.

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@article{osti_1214243,

  title        = {Gauge B – L model with residual Z 3 symmetry},

  author       = {Ma, Ernest and Pollard, Nicholas and Srivastava, Rahul and Zakeri, Mohammadreza},

  abstractNote = {We study a gauge B–L extension of the standard model of quarks and leptons with unconventional charges for the singlet right-handed neutrinos, and extra singlet scalars, such that a residual Z3 symmetry remains after the spontaneous breaking of B–L. The phenomenological consequences of this scenario, including the possibility of long-lived self-interacting dark matter and Z' collider signatures is discussed. Lepton number L is a familiar concept. It is usually defined as a global U (1) symmetry, under which the leptons of the standard model (SM), i.e. e,μ,τ together with their neutrinos νe,νμ,ντ have L=1, and all other SM particles have L=0. In the case of nonzero Majorana neutrino masses, this continuous symmetry is broken to a discrete Z2 symmetry, i.e. (-1)L or lepton parity. In this paper, we consider a gauge B–L extension of the SM, such that a residual Z3 symmetry remains after the spontaneous breaking of B–L. This is then a realization of the unusual notion of Z3 lepton symmetry. It has specific phenomenological consequences, including the possibility of a long-lived particle as a dark-matter candidate.},

  doi          = {10.1016/j.physletb.2015.09.010},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 750,

  place        = {Netherlands},

  year         = {2015},

  month        = {11}

}

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Title: Gauge B – L model with residual Z 3 symmetry

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Title: Gauge $B – L$ model with residual $Z_{3}$ symmetry