LHC accessible second Higgs boson in the left-right model

Mohapatra, Rabindra N.

doi:10.1103/physrevd.89.055001

Cited by 19 publications

(21 citation statements)

References 49 publications

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“…[12]. 2 The FCNC constraints on the bi-doublet fields can be relaxed by introducing an extra SU (2)R quark doublet to generate the quark mixings in the SM [41].…”

Section: Contentsmentioning

confidence: 99%

Probing the Higgs sector of the minimal Left-Right symmetric model at future hadron colliders

Dev

Mohapatra

Zhang

2016

J. High Energ. Phys.

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If neutrino masses arise from a TeV-scale minimal Left-Right seesaw model, the ensuing extended Higgs sector with neutral, singly and doubly-charged scalars has a plethora of implications for new Higgs boson searches beyond the Standard Model at future hadron colliders, such as the √ s = 14 TeV High-Luminosity Large Hadron Collider (HL-LHC) and the proposed √ s = 100 TeV collider (FCC-hh or SPPC).In this article, we provide a glimpse of this new physics in the Higgs sector. Our discussion focuses on the minimal non-supersymmetric version of the Left-Right model with high-scale parity breaking but TeV-scale SU (2) R -breaking, a property desirable to suppress the type-II seesaw contribution to neutrino masses. We analyze the masses and couplings of the physical Higgs bosons in this model, and discuss their dominant production and decay modes at hadron colliders. We identify the best discovery channels for each of the non-SM Higgs bosons and estimate the expected SM backgrounds in these channels to derive the sensitivity reaches for the new Higgs sector at future hadron colliders under discussion. Following a rather conservative approach, we estimate that the heavy Higgs sector can be effectively probed up to 15 TeV at the √ s = 100 TeV machine. We also discuss how the LR Higgs sector can be distinguished from other extended Higgs sectors. 1 28 6.1.2 H ± 1 28 6.2 Hadrophobic Higgs Sector 29 6.2.1 H 0 3 30 6.2.2 H ±± 2 31 7 Distinction between the LR and MSSM Higgs sectors 34 8 Summary 35 A Couplings involving the SM and heavy LR Higgs sector 36 B Dominant decay widths of the heavy Higgs bosons 38 -1 -

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“…[12]. 2 The FCNC constraints on the bi-doublet fields can be relaxed by introducing an extra SU (2)R quark doublet to generate the quark mixings in the SM [41].…”

Section: Contentsmentioning

confidence: 99%

Probing the Higgs sector of the minimal Left-Right symmetric model at future hadron colliders

Dev

Mohapatra

Zhang

2016

J. High Energ. Phys.

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“…The usual scalar sector consists of Higgs triplets ∆ L and ∆ R as well as of a Higgs bi-doublet Φ, transforming as 1 : [37][38][39][40][41][42] for recent limits on the scalar sector of Left-Right models…”

Section: Left-right Symmetric Modelsmentioning

confidence: 99%

Left-right symmetry and lepton number violation at the Large Hadron electron Collider

Lindner

Queiroz

Rodejohann

et al. 2016

J. High Energ. Phys.

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We show that the proposed Large Hadron electron Collider (LHeC) will provide an opportunity to search for left-right symmetry and establish lepton number violation, complementing current and planned searches based on LHC data and neutrinoless double beta decay. We consider several plausible configurations for the LHeC -including different electron energies and polarizations, as well as distinct values for the charge misidentification rate. Within left-right symmetric theories we determine the values of right-handed neutrino and gauge boson masses that could be tested at the LHeC after one, five and ten years of operation. Our results indicate that this collider might probe, via the ∆L = 2 signal e − p → e + jjj, Majorana neutrino masses up to 1 TeV and W R masses up to ∼ 6.5 TeV. Interestingly, part of this parameter space is beyond the expected reach of the LHC and of future neutrinoless double beta decay experiments.

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“…In two papers, attempts were made to address this issue, in one case using a higher dimensional operator [47] and in another using an extension that adds extra fermions and scalars [48]. In this paper, we provide a new economical extension of the LRSM by adding just a real B − L = 0 SU (2) R scalar triplet δ R and show that it provides a simple way to ameliorate this problem for a large range of W R mass.…”

Section: Introductionmentioning

confidence: 96%

Ameliorating Higgs induced flavor constraints on TeV scale W

Mohapatra

Yan

2019

Nuclear Physics B

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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 v R (15 − 25) TeV depending on whether the theory is kept invariant under charge conjugation (Q L → (Q R ) c ) or under parity (Q L → Q R ) respectively and an LHC accessible few-TeV range mass of W R boson which would require v R 10 (15) TeV if g R /g L = 1(0.65). This requires one quartic coupling in the scalar potential to go nonperturbative, posing a theoretical problem if the W R 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 W R mass of 8.1 (5.26) TeV for the parity case with g R /g L = 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 W R 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.

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LHC accessible second Higgs boson in the left-right model

Cited by 19 publications

References 49 publications

Probing the Higgs sector of the minimal Left-Right symmetric model at future hadron colliders

Probing the Higgs sector of the minimal Left-Right symmetric model at future hadron colliders

Left-right symmetry and lepton number violation at the Large Hadron electron Collider

Ameliorating Higgs induced flavor constraints on TeV scale W

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