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Cabibbo–Kobayashi–Maskawa-favored B decays to a scalar meson and a D meson

In this work, we attempt to study the Cabibbo–Kobayashi–Maskawa-favored [Formula: see text] (“S” denoting the scalar meson) decays within the perturbative QCD approach at the leading order and the leading power. Although the light scalar mesons are widely perceived as primarily the four-quark bound...

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Autores principales: Zou, Zhi-Tian, Li, Ying, Liu, Xin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5730691/
https://www.ncbi.nlm.nih.gov/pubmed/29263714
http://dx.doi.org/10.1140/epjc/s10052-017-5441-1
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author Zou, Zhi-Tian
Li, Ying
Liu, Xin
author_facet Zou, Zhi-Tian
Li, Ying
Liu, Xin
author_sort Zou, Zhi-Tian
collection PubMed
description In this work, we attempt to study the Cabibbo–Kobayashi–Maskawa-favored [Formula: see text] (“S” denoting the scalar meson) decays within the perturbative QCD approach at the leading order and the leading power. Although the light scalar mesons are widely perceived as primarily the four-quark bound states, in practice it is hard for us to make quantitative predictions based on the four-quark picture for light scalars. Hence, we calculate the decays with light scalars in the two-quark model. For the decays with scalar mesons above 1 GeV, we have explored two possible scenarios, depending on whether the light scalars are treated as the lowest lying [Formula: see text] states or four-quark particles. In total, we calculated the branching fractions of 72 decay modes, and most of them are in the range [Formula: see text] –[Formula: see text] , which are measurable in the on-going LHCb experiment and the forthcoming Belle-II experiment. Moreover, since in the standard model these decays occur only through tree operators and have no CP asymmetries, any deviation will be a signal of new physics beyond the standard model. Despite large uncertainties induced by nonperturbative parameters and corrections of high order and high power, our results and discussions will be useful for the on-going LHCb and the forthcoming Belle-II experiments.
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spelling pubmed-57306912017-12-18 Cabibbo–Kobayashi–Maskawa-favored B decays to a scalar meson and a D meson Zou, Zhi-Tian Li, Ying Liu, Xin Eur Phys J C Part Fields Regular Article - Theoretical Physics In this work, we attempt to study the Cabibbo–Kobayashi–Maskawa-favored [Formula: see text] (“S” denoting the scalar meson) decays within the perturbative QCD approach at the leading order and the leading power. Although the light scalar mesons are widely perceived as primarily the four-quark bound states, in practice it is hard for us to make quantitative predictions based on the four-quark picture for light scalars. Hence, we calculate the decays with light scalars in the two-quark model. For the decays with scalar mesons above 1 GeV, we have explored two possible scenarios, depending on whether the light scalars are treated as the lowest lying [Formula: see text] states or four-quark particles. In total, we calculated the branching fractions of 72 decay modes, and most of them are in the range [Formula: see text] –[Formula: see text] , which are measurable in the on-going LHCb experiment and the forthcoming Belle-II experiment. Moreover, since in the standard model these decays occur only through tree operators and have no CP asymmetries, any deviation will be a signal of new physics beyond the standard model. Despite large uncertainties induced by nonperturbative parameters and corrections of high order and high power, our results and discussions will be useful for the on-going LHCb and the forthcoming Belle-II experiments. Springer Berlin Heidelberg 2017-12-14 2017 /pmc/articles/PMC5730691/ /pubmed/29263714 http://dx.doi.org/10.1140/epjc/s10052-017-5441-1 Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3
spellingShingle Regular Article - Theoretical Physics
Zou, Zhi-Tian
Li, Ying
Liu, Xin
Cabibbo–Kobayashi–Maskawa-favored B decays to a scalar meson and a D meson
title Cabibbo–Kobayashi–Maskawa-favored B decays to a scalar meson and a D meson
title_full Cabibbo–Kobayashi–Maskawa-favored B decays to a scalar meson and a D meson
title_fullStr Cabibbo–Kobayashi–Maskawa-favored B decays to a scalar meson and a D meson
title_full_unstemmed Cabibbo–Kobayashi–Maskawa-favored B decays to a scalar meson and a D meson
title_short Cabibbo–Kobayashi–Maskawa-favored B decays to a scalar meson and a D meson
title_sort cabibbo–kobayashi–maskawa-favored b decays to a scalar meson and a d meson
topic Regular Article - Theoretical Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5730691/
https://www.ncbi.nlm.nih.gov/pubmed/29263714
http://dx.doi.org/10.1140/epjc/s10052-017-5441-1
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