Studying $\varepsilon$'\/$\varepsilon$ in the chiral quark model: $\gamma_{5}$-scheme independence and NLO hadronic matrix elements

We study the CP-violating, |\Delta S| =1 parameter \varepsilon '/\varepsilon by computing the hadronic matrix elements in the chiral quark model. We estimate the coefficients of the next-to-leading order terms in the chiral expansion that correspond to the operators Q_6 and Q_{11}. We consider...

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Detalles Bibliográficos
Autores principales: Bertolini, S, Eeg, Jan O, Fabbrichesi, Marco E
Lenguaje:eng
Publicado: 1994
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0550-3213(95)00274-V
http://cds.cern.ch/record/269585
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author Bertolini, S
Eeg, Jan O
Fabbrichesi, Marco E
author_facet Bertolini, S
Eeg, Jan O
Fabbrichesi, Marco E
author_sort Bertolini, S
collection CERN
description We study the CP-violating, |\Delta S| =1 parameter \varepsilon '/\varepsilon by computing the hadronic matrix elements in the chiral quark model. We estimate the coefficients of the next-to-leading order terms in the chiral expansion that correspond to the operators Q_6 and Q_{11}. We consider the impact of these corrections on the value of \varepsilon '/\varepsilon. We also investigate the possibility that the chiral quark model might drastically reduce the dimensional regularization \gamma_5-scheme dependence of current evaluations of \varepsilon '/\varepsilon.
id cern-269585
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1994
record_format invenio
spelling cern-2695852019-09-30T06:29:59Zdoi:10.1016/0550-3213(95)00274-Vhttp://cds.cern.ch/record/269585engBertolini, SEeg, Jan OFabbrichesi, Marco EStudying $\varepsilon$'\/$\varepsilon$ in the chiral quark model: $\gamma_{5}$-scheme independence and NLO hadronic matrix elementsParticle Physics - PhenomenologyWe study the CP-violating, |\Delta S| =1 parameter \varepsilon '/\varepsilon by computing the hadronic matrix elements in the chiral quark model. We estimate the coefficients of the next-to-leading order terms in the chiral expansion that correspond to the operators Q_6 and Q_{11}. We consider the impact of these corrections on the value of \varepsilon '/\varepsilon. We also investigate the possibility that the chiral quark model might drastically reduce the dimensional regularization \gamma_5-scheme dependence of current evaluations of \varepsilon '/\varepsilon.hep-ph/9409437CERN-TH-7306-94SISSA-83-94-EPoai:cds.cern.ch:2695851994-09-29
spellingShingle Particle Physics - Phenomenology
Bertolini, S
Eeg, Jan O
Fabbrichesi, Marco E
Studying $\varepsilon$'\/$\varepsilon$ in the chiral quark model: $\gamma_{5}$-scheme independence and NLO hadronic matrix elements
title Studying $\varepsilon$'\/$\varepsilon$ in the chiral quark model: $\gamma_{5}$-scheme independence and NLO hadronic matrix elements
title_full Studying $\varepsilon$'\/$\varepsilon$ in the chiral quark model: $\gamma_{5}$-scheme independence and NLO hadronic matrix elements
title_fullStr Studying $\varepsilon$'\/$\varepsilon$ in the chiral quark model: $\gamma_{5}$-scheme independence and NLO hadronic matrix elements
title_full_unstemmed Studying $\varepsilon$'\/$\varepsilon$ in the chiral quark model: $\gamma_{5}$-scheme independence and NLO hadronic matrix elements
title_short Studying $\varepsilon$'\/$\varepsilon$ in the chiral quark model: $\gamma_{5}$-scheme independence and NLO hadronic matrix elements
title_sort studying $\varepsilon$'\/$\varepsilon$ in the chiral quark model: $\gamma_{5}$-scheme independence and nlo hadronic matrix elements
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/0550-3213(95)00274-V
http://cds.cern.ch/record/269585
work_keys_str_mv AT bertolinis studyingvarepsilonvarepsiloninthechiralquarkmodelgamma5schemeindependenceandnlohadronicmatrixelements
AT eegjano studyingvarepsilonvarepsiloninthechiralquarkmodelgamma5schemeindependenceandnlohadronicmatrixelements
AT fabbrichesimarcoe studyingvarepsilonvarepsiloninthechiralquarkmodelgamma5schemeindependenceandnlohadronicmatrixelements

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