2γ decays of scalar mesons (σ(600), f 0(980), and a 0(980)) in the Nambu-Jona-Lasinio model

Волков, М. К.; Kuraev, É. A.; Bystritskiy, Yu. M.

doi:10.1134/s1063778810030063

Cited by 6 publications

(7 citation statements)

References 41 publications

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“…The calculation of A S = A(t 2 = M 2 s , 0, 0) can be carried out on the basis of the quark model. Using the quark-loop amplitude contributing to the decay S → γ + γ we can present the general structure of the two-photon scalar meson decay amplitudes as follows [14,15]:…”

Section: Transition Form Factor 2γ → Smentioning

confidence: 99%

Hadronic contribution of light by light scattering in the energy spectrum of muonic hydrogen

Dorokhov

Martynenko

et al. 2019

EPJ Web Conf.

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The contribution from scalar meson (S) exchange to the potential of the muon-proton interaction in muonic hydrogen induced by the scalar meson coupling to the two photon state is calculated. An estimate of transition form factor S → γγ is given on the basis of the quark model and experimental data on the decay widths $${\Gamma _{S\gamma \gamma }}$$. It is shown that scalar meson exchange contribution to the Lamb shift in muonic hydrogen ∆ELs(2P – 2S) is large and important for a comparison with precise experimental data.

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Section: Transition Form Factor 2γ → Smentioning

confidence: 99%

Hadronic contribution of light by light scattering in the energy spectrum of muonic hydrogen

Dorokhov

Martynenko

et al. 2019

EPJ Web Conf.

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“…In order to compute the TC Higgs vertex with γγ and GG we adopt a "hybrid" model [44][45][46][47], in which the composite TC Higgs couples to the constituent techniflavors F through a Yukawa-like vertex:…”

Section: Tc Higgs Couplings To γγ and Ggmentioning

confidence: 99%

Technicolor Higgs boson in the light of LHC data

et al. 2014

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“…Coupling constant A σ can be related with the decay width Γ σ→γγ [41,42]. Two expressions (23), (24) give contributions which are different in sign just as in the case of pseudoscalar meson.…”

Section: Quarks-2018mentioning

confidence: 99%

The proton size puzzle: experiment vs theory.

Dorokhov¹,

Martynenko

et al. 2018

EPJ Web Conf.

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Current status of the proton size puzzle from experimental and theoretical points of view is briefly discussed. The interest to these studies is primarily related to experiments conducted by the CREMA collaboration (Charge Radius Experi- ments with Muonic Atoms) with muonic hydrogen and deuterium by methods of laser spectroscopy. As a result a more accurate value of the proton charge radius was found to be rp = 0:84184(67) fm, which is different from the value recommended by CODATA for 7σ. In the second part we discuss recent calculations of the contribution of light pseudoscalar (PS) and axial-vector (AV) mesons to the interaction operator of a muon and a proton in muonic hydrogen atom, with the coupling of mesons to the muon being via two-photon intermediate state. Numerical estimates of the contributions to the hyperfine structure of the spectrum of the S and P levels are presented. It is shown that such contribution to the hyperfine splitting in muonic hydrogen is rather important for a comparison with precise experimental data.

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2γ decays of scalar mesons (σ(600), f 0(980), and a 0(980)) in the Nambu-Jona-Lasinio model

Cited by 6 publications

References 41 publications

Hadronic contribution of light by light scattering in the energy spectrum of muonic hydrogen

Hadronic contribution of light by light scattering in the energy spectrum of muonic hydrogen

Technicolor Higgs boson in the light of LHC data

The proton size puzzle: experiment vs theory.

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