Radial excitations of heavy-light mesons from QCD sum rules

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10284767" target="_blank" >RIV/00216208:11320/14:10284767 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1140/epjc/s10052-014-2979-z" target="_blank" >http://dx.doi.org/10.1140/epjc/s10052-014-2979-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-014-2979-z" target="_blank" >10.1140/epjc/s10052-014-2979-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Radial excitations of heavy-light mesons from QCD sum rules

Popis výsledku v původním jazyce

QCD sum rules are commonly used to predict the characteristics of ground-state hadrons. We demonstrate that two-point sum rules for the decay constants of charmed () and bottom () mesons can also be modified to estimate the decay constants of the first radial excitations, and , respectively, provided the masses of these resonances are used as an input. For the radially excited charmed mesons we use available experimental data, whereas the masses of analogous bottom mesons are estimated from the heavy-quark limit. The decay constants predicted for the radial excitations of heavy-light pseudoscalar and vector mesons are systematically smaller than those of the ground states and we comment on the possible origin of this difference. Our results can be usedin the sum rule calculations of heavy-to-light form factors and in the factorization approximations for nonleptonic -meson decays where the decay constants of charmed mesons enter as input parameters.

Název v anglickém jazyce

Radial excitations of heavy-light mesons from QCD sum rules

Popis výsledku anglicky

QCD sum rules are commonly used to predict the characteristics of ground-state hadrons. We demonstrate that two-point sum rules for the decay constants of charmed () and bottom () mesons can also be modified to estimate the decay constants of the first radial excitations, and , respectively, provided the masses of these resonances are used as an input. For the radially excited charmed mesons we use available experimental data, whereas the masses of analogous bottom mesons are estimated from the heavy-quark limit. The decay constants predicted for the radial excitations of heavy-light pseudoscalar and vector mesons are systematically smaller than those of the ground states and we comment on the possible origin of this difference. Our results can be usedin the sum rule calculations of heavy-to-light form factors and in the factorization approximations for nonleptonic -meson decays where the decay constants of charmed mesons enter as input parameters.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

<a href="/cs/project/LG13031" target="_blank" >LG13031: Spolupráce ČR s CERN</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

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Svazek periodika

74

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

25

Strana od-do

1-25

Kód UT WoS článku

000340574000001

EID výsledku v databázi Scopus

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