Associated production of Higgs boson with a photon at electron-positron colliders

Demirci, Mehmet

doi:10.1103/physrevd.100.075006

Cited by 8 publications

(5 citation statements)

References 61 publications

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“…[94][95][96]. There are also some works on this process in many new physics models, for example, the MSSM [96][97][98][99], extended scalar sector models [100,101], VLQ models [102], effective field theory framework [103][104][105][106], and simplified scenarios [107]. Besides, we can also probe the FCNY couplings through direct production processes pp → Tth; Tt; ThW; Thj.…”

Section: Numerical Results and Constraint Prospectsmentioning

confidence: 99%

Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings

2020

Phys. Rev. D

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With the deeper study of Higgs particle, Higgs precision measurements can be served to probe new physics indirectly. In many new physics models, vectorlike quarks T L , T R occur naturally. It is important to probe their couplings with standard model particles. In this work, we consider the singlet T L , T R extended models and show how to constrain the Tth couplings through the h → γZ decay at high-luminosity LHC. First, we derive the perturbative unitarity bounds on jy tT L;R j with other couplings set to be zeros simply. To optimize the situation, we take m T ¼ 400 GeV and s L ¼ 0.2 considering the experimental constraints. Under this benchmark point, we find that the future bounds from h → γZ decay can limit the real parts of y tT L;R in the positive direction to be O(1) because of the double enhancement. For the real parts of y tT L;R in the negative direction, it is always surpassed by the perturbative unitarity. Moreover, we find that the top quark electric dipole moment can give stronger bounds (especially the imaginary parts of y tT L;R) than the perturbative unitarity and h → γZ decay in the off-axis regions for some scenarios.

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Section: Numerical Results and Constraint Prospectsmentioning

confidence: 99%

Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings

2020

Phys. Rev. D

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“…With the highluminosity designed at future LCs [3], the signal of Higgs boson production associated with a photon can be probed. Many computations for one-loop corrections to at future LCs in the SM are available [58][59][60], such as those in many frameworks of the HESM [61][62][63] and in the minimal supersymmetric standard model [64]. In this work, we show that cross-sections of can be derived by using one-loop form factors in .…”

Section: Introductionmentioning

confidence: 85%

“…Here, the one-loop form factors are collected as coefficient of . By comparing with the one-loop form factors , we find that the form factors can be derived from by applying the following relations: The above relations can be explained by applying crosssymmetry for converting the decay process to the production scattering ; see [63] for more detail. The differential cross section for the production process, including initial beam polarizations, can be expressed in terms of one-loop form factors as follows:…”

Section: Uv Ir Uv Ir Ir Uvmentioning

confidence: 99%

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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“…For the photon structure function, Compton backscattered photons, which are interfaced by the CompAZ code [57], are used. Using the tools described above, we have previously carried out several works and found significant results [58,59].…”

Section: Analytical Expressions For the Production Cross-sectionmentioning

confidence: 99%

Pseudoscalar Higgs boson pair production at a photon-photon collision in the two Higgs doublet model

2019

Turk J Phys

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In this study, the direct pair production of the pseudoscalar Higgs boson at a γγ collision is analyzed in the context of the two Higgs doublet model (THDM), taking into account the complete one-loop contributions. In order to illustrate the effect of the new physics, four benchmark point scenarios, which are consistent with theoretical and current experimental constraints, are chosen in the type-I THDM with an exact alignment limit. The effect of individual contributions from each type of one-loop diagram on the total cross-section is examined in detail. The dependence of the cross-section on the center-of-mass energy is also presented at the various polarization configurations of the incoming photons. Moreover, the regions m 2 12 − tan β and mA − tan β in the parameter space of the THDM are scanned for some fixed values of other parameters. The box-type diagrams make a much bigger contribution to the cross-section than the others at high energies. The total cross-section can be enhanced by a factor of two thanks to opposite-polarized photons as well as threshold effects.

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Associated production of Higgs boson with a photon at electron-positron colliders

Cited by 8 publications

References 61 publications

Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings

Higgs boson to γZ decay as a probe of flavor-changing neutral Yukawa couplings

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

Pseudoscalar Higgs boson pair production at a photon-photon collision in the two Higgs doublet model

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