The 28 GeV Dimuon Excess in Lepton Specific 2HDM

Cici, Ali; Khalil, S.; Nis, Busra; Ün, Cem Salih

doi:10.48550/arxiv.1909.02588

Cited by 3 publications

(2 citation statements)

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“…However, this consensus is not mandatory and no any principle forbids the existence of low mass BSM particles. For example, a light Higgs-like boson with mass of 28 GeV is predicted in the Two-Higgs-Doublet Model [29].…”

Section: Introductionmentioning

confidence: 99%

A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson?

Zhu,

Guo,

Zhang

et al. 2020

Preprint

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A peak structure of J/ψ pair production around 6.9 GeV was observed and analyzed by the LHCb collaboration using the Run I and II data of LHC. How to understand this peak arouses enthusiastic discussions among both theorists and experimentalists of high energy physics, because this discovery might hint something new. Overwhelming works on this topic tend to attribute the peak as a four-quark state: tetraquark or molecule. Instead, we suggest that this peak is corresponding to a fundamental Higgs-like boson with mass about 6.9 GeV which is advocated by a BSM effective theory. We present a detailed analysis on both signal and SM background, including integrated cross sections and invariant mass distributions of the final-state J/ψ pair. Our numerical results are well in coincidence with the experimental data, as postulating the resonance observed by LHCb to be a BSM 0 ++ scalar. Therefore, the peak at M di-J/ψ ∼ 6.9 GeV might be a hint of new physics beyond the SM whose scale is not as large as mostly expected by high energy physicists. More further works are urgently needed in both experimental and theoretical aspects to validate or negate this assumption.

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Section: Introductionmentioning

confidence: 99%

A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson?

Zhu,

Guo,

Zhang

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…In this paper, the 0 ++ enhancement φ( does not exist a principle forbidding the existence of lighter BSM particles. For example, the two-Higgs-doublet-model may predict a new Higgs-like boson with mass of 28 GeV [15]. By the general method adopted for searching TeV-scale particles at LHC, alternatively, we, in this work, explore a new Higgs-like boson at low energy regions.…”

Section: Introductionmentioning

confidence: 99%

Hunting for possible Higgs-like boson beyond the Standard Model

Guo,

Zhu,

Zhang

et al. 2020

Preprint

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A recent preliminary investigation based on Durgut's report at the American Physical Society site shows a structure at 18.4 GeV exists in the invariant mass distribution of Υl + l − (l = e, µ) at the LHC center-of-mass energy of 7 and 8 TeV. Its appearance attracts attention of theorists and experimentalists of high energy physics, because it might be a Higgs-like boson of 18.4 GeV which would serve as a signal of the new physics beyond the Standard Model. We have carried out computations on the corresponding quantities (production and decay rates) based on quantum field theory and compared the results with experimental data. Our numerical results do not support the assertion that the 18.4 GeV peak corresponds to a neutral 0 ++ boson which decays into Υl + l − . Much further works (both experimental and theoretical) are badly needed.

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