Light-cone distribution amplitudes of light mesons with QED effects

Abstract We discuss the generalization of the leading-twist light-cone distribution amplitude for light mesons including QED effects. This generalization was introduced to describe virtual collinear photon exchanges at the strong-interaction scale ΛQCD in the factorization of QED effects in non-lept...

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Main Authors:	Martin Beneke, Philipp Böer, Jan-Niklas Toelstede, K. Keri Vos
Format:	article
Language:	EN
Published:	SpringerOpen 2021
Subjects:	QCD Phenomenology NLO Computations Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Online Access:	https://doaj.org/article/ce7c0a6d77ec4acd912f07a36c0d3fc0
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spelling	oai:doaj.org-article:ce7c0a6d77ec4acd912f07a36c0d3fc02021-11-14T12:42:24ZLight-cone distribution amplitudes of light mesons with QED effects10.1007/JHEP11(2021)0591029-8479https://doaj.org/article/ce7c0a6d77ec4acd912f07a36c0d3fc02021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)059https://doaj.org/toc/1029-8479Abstract We discuss the generalization of the leading-twist light-cone distribution amplitude for light mesons including QED effects. This generalization was introduced to describe virtual collinear photon exchanges at the strong-interaction scale ΛQCD in the factorization of QED effects in non-leptonic B-meson decays. In this paper we study the renormalization group evolution of this non-perturbative function. For charged mesons, in particular, this exhibits qualitative differences with respect to the well-known scale evolution in QCD only, especially regarding the endpoint-behaviour. We analytically solve the evolution equation to first order in the electromagnetic coupling α em, which resums large logarithms in QCD on top of a fixed-order expansion in α em. We further provide numerical estimates for QED corrections to Gegenbauer coefficients as well as inverse moments relevant to (QED-generalized) factorization theorems for hard exclusive processes.Martin BenekePhilipp BöerJan-Niklas ToelstedeK. Keri VosSpringerOpenarticleQCD PhenomenologyNLO ComputationsNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-30 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	QCD Phenomenology NLO Computations Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	QCD Phenomenology NLO Computations Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Martin Beneke Philipp Böer Jan-Niklas Toelstede K. Keri Vos Light-cone distribution amplitudes of light mesons with QED effects
description	Abstract We discuss the generalization of the leading-twist light-cone distribution amplitude for light mesons including QED effects. This generalization was introduced to describe virtual collinear photon exchanges at the strong-interaction scale ΛQCD in the factorization of QED effects in non-leptonic B-meson decays. In this paper we study the renormalization group evolution of this non-perturbative function. For charged mesons, in particular, this exhibits qualitative differences with respect to the well-known scale evolution in QCD only, especially regarding the endpoint-behaviour. We analytically solve the evolution equation to first order in the electromagnetic coupling α em, which resums large logarithms in QCD on top of a fixed-order expansion in α em. We further provide numerical estimates for QED corrections to Gegenbauer coefficients as well as inverse moments relevant to (QED-generalized) factorization theorems for hard exclusive processes.
format	article
author	Martin Beneke Philipp Böer Jan-Niklas Toelstede K. Keri Vos
author_facet	Martin Beneke Philipp Böer Jan-Niklas Toelstede K. Keri Vos
author_sort	Martin Beneke
title	Light-cone distribution amplitudes of light mesons with QED effects
title_short	Light-cone distribution amplitudes of light mesons with QED effects
title_full	Light-cone distribution amplitudes of light mesons with QED effects
title_fullStr	Light-cone distribution amplitudes of light mesons with QED effects
title_full_unstemmed	Light-cone distribution amplitudes of light mesons with QED effects
title_sort	light-cone distribution amplitudes of light mesons with qed effects
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/ce7c0a6d77ec4acd912f07a36c0d3fc0
work_keys_str_mv	AT martinbeneke lightconedistributionamplitudesoflightmesonswithqedeffects AT philippboer lightconedistributionamplitudesoflightmesonswithqedeffects AT janniklastoelstede lightconedistributionamplitudesoflightmesonswithqedeffects AT kkerivos lightconedistributionamplitudesoflightmesonswithqedeffects
_version_	1718429074632736768

Light-cone distribution amplitudes of light mesons with QED effects

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