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Title: Ameliorating Higgs induced flavor constraints on TeV scale W

Abstract

In the TeV scale minimal left-right symmetric model (LRSM) for neutrino masses, there is a tension between the flavor changing Higgs effects which prefer an SU(2)R breaking scale vR (15 - 25) TeV depending on whether the theory is kept invariant under charge conjugation (QL → (QR)c) or under parity (QL → QR) respectively and an LHC accessible few-TeV range mass of WR boson which would require vR 10 (15) TeV if gR/gL = 1(0.65). This requires one quartic coupling in the scalar potential to go nonperturbative, posing a theoretical problem if the WR is discovered at LHC. We propose a simple extension of the minimal LRSM that adds a B - L = 0 scalar triplet and study how this can ameliorate this tension. We find that such a model is also constrained from various considerations and implies a lower bound on the WR mass of 8.1 (5.26) TeV for the parity case with gR/gL = 1 (0.65) and 4.85 (3.16) TeV for the case of charge conjugation, if the flavor constraints have to be avoided while keeping all couplings perturbative. These mass ranges are accessible at the high-luminosity LHC. The model also implies new decay mode of WRmore » to two scalars which is absent in the minimal LRSM. Finally we comment on the impact of such a scalar multiplet for a class of dark matter extension of LRSM discussed in the literature recently.« less

Authors:
; ;
Publication Date:
Research Org.:
Washington Univ., St. Louis, MO (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1562733
Alternate Identifier(s):
OSTI ID: 1803207
Grant/Contract Number:  
SC0017987
Resource Type:
Published Article
Journal Name:
Nuclear Physics. B
Additional Journal Information:
Journal Name: Nuclear Physics. B Journal Volume: 948 Journal Issue: C; Journal ID: ISSN 0550-3213
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Physics

Citation Formats

Mohapatra, Rabindra N., Yan, Guanwen, and Zhang, Yongchao. Ameliorating Higgs induced flavor constraints on TeV scale W. Netherlands: N. p., 2019. Web. doi:10.1016/j.nuclphysb.2019.114764.
Mohapatra, Rabindra N., Yan, Guanwen, & Zhang, Yongchao. Ameliorating Higgs induced flavor constraints on TeV scale W. Netherlands. https://doi.org/10.1016/j.nuclphysb.2019.114764
Mohapatra, Rabindra N., Yan, Guanwen, and Zhang, Yongchao. Fri . "Ameliorating Higgs induced flavor constraints on TeV scale W". Netherlands. https://doi.org/10.1016/j.nuclphysb.2019.114764.
@article{osti_1562733,
title = {Ameliorating Higgs induced flavor constraints on TeV scale W},
author = {Mohapatra, Rabindra N. and Yan, Guanwen and Zhang, Yongchao},
abstractNote = {In the TeV scale minimal left-right symmetric model (LRSM) for neutrino masses, there is a tension between the flavor changing Higgs effects which prefer an SU(2)R breaking scale vR (15 - 25) TeV depending on whether the theory is kept invariant under charge conjugation (QL → (QR)c) or under parity (QL → QR) respectively and an LHC accessible few-TeV range mass of WR boson which would require vR 10 (15) TeV if gR/gL = 1(0.65). This requires one quartic coupling in the scalar potential to go nonperturbative, posing a theoretical problem if the WR is discovered at LHC. We propose a simple extension of the minimal LRSM that adds a B - L = 0 scalar triplet and study how this can ameliorate this tension. We find that such a model is also constrained from various considerations and implies a lower bound on the WR mass of 8.1 (5.26) TeV for the parity case with gR/gL = 1 (0.65) and 4.85 (3.16) TeV for the case of charge conjugation, if the flavor constraints have to be avoided while keeping all couplings perturbative. These mass ranges are accessible at the high-luminosity LHC. The model also implies new decay mode of WR to two scalars which is absent in the minimal LRSM. Finally we comment on the impact of such a scalar multiplet for a class of dark matter extension of LRSM discussed in the literature recently.},
doi = {10.1016/j.nuclphysb.2019.114764},
journal = {Nuclear Physics. B},
number = C,
volume = 948,
place = {Netherlands},
year = {2019},
month = {11}
}

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