General one-loop formulas for $$H\rightarrow f\bar{f}\gamma $$ and its applications

On, Vo Van; Tran, Dzung Tri; Nguyen, Chi L.; Phan, Khiem Hong

doi:10.1140/epjc/s10052-022-10225-z

Cited by 9 publications

(11 citation statements)

References 44 publications

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“…As there no virtual photon exchanging in the loop, we do not have the -divergence in the processes. We have confirmed the finiteness for the form factors analytically in [30,32].…”

Section: Uv Ir Uv Ir Ir Uvsupporting

confidence: 84%

“…We have derived alternative presentations for one-loop contributions of in the Higgs extension of the standard model (HESM) [32]. In [32], the computations have addressed the 't Hooft-Feynman (HF) gauge and confirm the results in our previous studies [30,31] in the unitary gauge. We note that all contributions of singly and doubly charged Higgses propagating in the loop diagrams have been taken into account in Ref.…”

Section: Introductionmentioning

confidence: 56%

“…As proved in Ref. [30], we only collect one-loop form factors, which are proportional to the (for ) appearing in Eq. (50).…”

Section: Verticesmentioning

confidence: 99%

“…Recently, one-loop expressions for in general BSM frameworks have been presented in Refs. [30,31]. We have derived alternative presentations for one-loop contributions of in the Higgs extension of the standard model (HESM) [32].…”

Section: Introductionmentioning

confidence: 99%

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One-loop contributions for and in the extension of the standard model*

Tri,

Nguyen,

Phan

2024

Chinese Phys. C

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We present one-loop contributingfor $h\rightarrow \ell \bar{\ell}\gamma$with $\ell =\nu_{e,\mu, \tau}, e, \mu$ and $e^-e^+\rightarrow h\gamma$ in $U(1)_{B-L}$ extension of the standard models. In phenomenological results, the signal strengths for $h\rightarrow \ell \bar{\ell}\gamma$ at Large Hadron Collider and for $e^-e^+\rightarrow h\gamma$at future Lepton Collidersare analyzed in physical parameter space for both vector and chiral $B-L$ models. We find that the contributions from neutral gauge boson $Z'$ to the signal strengths are rather small. Consequence, the effects are hard to probe at future colliders.While the impacts of charged Higgs in the chiral $B-L$ model on the signal strengthsare significant and can be measured with the help of the initial polarization beams at future lepton colliders.Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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“…As there no virtual photon exchanging in the loop, we do not have the -divergence in the processes. We have confirmed the finiteness for the form factors analytically in [30,32].…”

Section: Uv Ir Uv Ir Ir Uvsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 56%

“…As proved in Ref. [30], we only collect one-loop form factors, which are proportional to the (for ) appearing in Eq. (50).…”

Section: Verticesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

One-loop contributions for and in the extension of the standard model*

Tri,

Nguyen,

Phan

2024

Chinese Phys. C

Self Cite

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“…ℓ where s, t, u are the Mandelstam variables defined as s = (p 1 + p 2 ) 2 , t = (p 1 + k) 2 and u = (p 2 + k) 2 and coefficient C 0 = − 4παm ℓ m W sin θ W . The amplitude of one-loop contribution can be written as [34,35,37],…”

Section: Theoretical Frame Workmentioning

confidence: 99%

Analysis of final state lepton polarization-dependent observables in H → ℓ+ℓ−γ in the SM at loop level

Ahmed,

Hasan,

Iqbal

et al. 2024

J. High Energ. Phys.

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Recently, the CMS and ATLAS collaborations have announced the results for H → Z[→ ℓ+ℓ−]γ with ℓ = e or μ [1, 2], where H → Zγ is a sub-process of H → ℓ+ℓ−γ. This semi-leptonic Higgs decay gets both resonant and non-resonant contributions from the loop-induced H → Z[→ ℓ+ℓ−]γ. To probe further features coming from these contributions to H → ℓ+ℓ−γ, we argue that the polarization of the final state leptons is also an important parameter. We show that the interference of resonant and non-resonant contributions, which is negligible in the case of unpolarized leptons, plays a significant role when considering the polarization of the final state lepton. For this purpose, we have calculated the polarized decay rates and the longitudinal (PL), normal (PN), and transverse (PT) polarization asymmetries. We find that these asymmetries purely come from the loop contributions and are helpful to further investigate the resonant and non-resonant nature of H → Z[→ ℓ+ℓ−]γ decay. We observe that for ℓ = e, μ, the longitudinal decay rate is highly suppressed around mℓℓ ≈ 60 GeV when the final lepton spin is $$ -\frac{1}{2} $$ − 1 2 , dramatically increasing the corresponding lepton polarization asymmetries. Furthermore, we analyze another observable, the ratio of decay rates $$ {R}_{i\pm}^{{\mathcal{ll}}^{\prime }} $$ R i ± ll ′ , where ℓ and ℓ′ refer to different final state lepton generations. Precise measurements of these observables at the HL-LHC and the planned e+e− collider can provide fertile ground to test not only the SM but also to examine the signatures of possible NP beyond the SM.

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One-loop contributions to decays e → eγ and (g−2)ea anomalies, and Ward identity

et al. 2023

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General one-loop formulas for $$H\rightarrow f\bar{f}\gamma $$ and its applications

Abstract: General one-loop contributions to the decay processes $$H\rightarrow f\bar{f}\gamma $$ H → f f ¯ γ and its applications are presented in this paper. We consider all possible contributions of the add… Show more

Cited by 9 publications

References 44 publications

One-loop contributions for and in the extension of the standard model*

One-loop contributions for and in the extension of the standard model*

Analysis of final state lepton polarization-dependent observables in H → ℓ+ℓ−γ in the SM at loop level

One-loop contributions to decays e → eγ and (g−2)ea anomalies, and Ward identity

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General one-loop formulas for $$H\rightarrow f\bar{f}\gamma $$ and its applications

Abstract: General one-loop contributions to the decay processes $$H\rightarrow f\bar{f}\gamma $$ H → f f ¯ γ and its applications are presented in this paper. We consider all possible contributions of the add… Show more

Cited by 9 publications

References 44 publications

One-loop contributions for and in the extension of the standard model*

One-loop contributions for and in the extension of the standard model*

Analysis of final state lepton polarization-dependent observables in H → ℓ+ℓ−γ in the SM at loop level

One-loop contributions to decays e → eγ and (g−2)ea anomalies, and Ward identity

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Product

Resources

About

One-loop contributions to decays e → eγ and (g−2)ea anomalies, and Ward identity