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Autores principales:	Knecht, Marc, Qian, Baiyi
Formato:	Preprint
Publicado:	2025
Materias:	High Energy Physics - Phenomenology
Acceso en línea:	https://arxiv.org/abs/2507.22551
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866909712284385280
author	Knecht, Marc Qian, Baiyi
author_facet	Knecht, Marc Qian, Baiyi
contents	This Letter addresses the contribution from the light $u , d , s$ quarks to the amplitudes for the decay modes of the Brout-Englert-Higgs scalar boson $H$ into two photons ($H\toγγ$) or to a photon and a neutral weak gauge boson ($H\toγZ$), taking into account the non-perturbative aspects of QCD. Contrary to a recent claim, the contribution from the light quarks does not vanish. Rather, it is shown that, in contrast to the perturbative evaluations usually considered in the literature, this contribution to the amplitudes starts with a term that is linear, and not quadratic, in the masses of the light quarks, thus pointing toward a sizeable enhancement of their contribution to $H \to γγ$.
format	Preprint
id	arxiv_https___arxiv_org_abs_2507_22551
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	On the contribution from the light quarks to $H\toγγ, γZ$ Knecht, Marc Qian, Baiyi High Energy Physics - Phenomenology This Letter addresses the contribution from the light $u , d , s$ quarks to the amplitudes for the decay modes of the Brout-Englert-Higgs scalar boson $H$ into two photons ($H\toγγ$) or to a photon and a neutral weak gauge boson ($H\toγZ$), taking into account the non-perturbative aspects of QCD. Contrary to a recent claim, the contribution from the light quarks does not vanish. Rather, it is shown that, in contrast to the perturbative evaluations usually considered in the literature, this contribution to the amplitudes starts with a term that is linear, and not quadratic, in the masses of the light quarks, thus pointing toward a sizeable enhancement of their contribution to $H \to γγ$.
title	On the contribution from the light quarks to $H\toγγ, γZ$
topic	High Energy Physics - Phenomenology
url	https://arxiv.org/abs/2507.22551

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