Chiral symmetry breaking, duality in the $\overline{Q}q$ channel and $b \to \overline{c}cs$ decays

We address the issue of the quark-hadron duality in the spectral densities induced by the heavy-light quark currents anti-Q q. In the limit m_Q ->oo, m_q ->0 we observe an enhancement of the physical spectral density compared to the quark one in the scalar and axial channels, due to the Goldst...

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Detalles Bibliográficos
Autores principales: Blok, B., Shifman, Mikhail A., Uraltsev, N.
Lenguaje:eng
Publicado: 1996
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(97)00122-3
http://cds.cern.ch/record/313725
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author Blok, B.
Shifman, Mikhail A.
Uraltsev, N.
author_facet Blok, B.
Shifman, Mikhail A.
Uraltsev, N.
author_sort Blok, B.
collection CERN
description We address the issue of the quark-hadron duality in the spectral densities induced by the heavy-light quark currents anti-Q q. In the limit m_Q ->oo, m_q ->0 we observe an enhancement of the physical spectral density compared to the quark one in the scalar and axial channels, due to the Goldstone meson contributions. This may imply that the scale where duality sets in in these channels is higher than in the vector (pseudoscalar) case. Implications for the nonleptonic decays of B mesons (the b -> anti-c cs transition) are considered.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1996
record_format invenio
spelling cern-3137252023-03-14T18:58:50Zdoi:10.1016/S0550-3213(97)00122-3http://cds.cern.ch/record/313725engBlok, B.Shifman, Mikhail A.Uraltsev, N.Chiral symmetry breaking, duality in the $\overline{Q}q$ channel and $b \to \overline{c}cs$ decaysParticle Physics - PhenomenologyWe address the issue of the quark-hadron duality in the spectral densities induced by the heavy-light quark currents anti-Q q. In the limit m_Q ->oo, m_q ->0 we observe an enhancement of the physical spectral density compared to the quark one in the scalar and axial channels, due to the Goldstone meson contributions. This may imply that the scale where duality sets in in these channels is higher than in the vector (pseudoscalar) case. Implications for the nonleptonic decays of B mesons (the b -> anti-c cs transition) are considered.We address the issue of the quark-hadron duality in the spectral densities induced by the heavy-light quark currents Q q . In the limit m Q → ∞, m q → 0 we observe an enhancement of the physical spectral density compared to the quark one in the scalar and axial channels, due to the Goldstone meson contributions. This may imply that the scale where duality sets in is higher in these channels than in the vector (pseudoscalar) case. Implications for the non-leptonic decays of B mesons (the b → c cs transition) are considered. We discuss in detail the decay pattern and obtain an independent estimate of the “wrong”-sign D yield.We address the issue of the quark-hadron duality in the spectral densities induced by the heavy-light quark currents anti-Q q. In the limit m_Q ->oo, m_q ->0 we observe an enhancement of the physical spectral density compared to the quark one in the scalar and axial channels, due to the Goldstone meson contributions. This may imply that the scale where duality sets in is higher in these channels than in the vector (pseudoscalar) case. Implications for the nonleptonic decays of B mesons (the b -> c anti-c s transition) are considered. We discuss in detail the decay pattern and obtain an independent estimate of the "wrong" sign D yield.hep-ph/9610515CERN-TH-96-252TPI-MINN-15-96-TUMN-TH-1509-96UND-HEP-96-BIG05CERN-TH-96-252TPI-MINN-96-15-TUMN-TH-1509UND-HEP-96-BIG-05oai:cds.cern.ch:3137251996-10-28
spellingShingle Particle Physics - Phenomenology
Blok, B.
Shifman, Mikhail A.
Uraltsev, N.
Chiral symmetry breaking, duality in the $\overline{Q}q$ channel and $b \to \overline{c}cs$ decays
title Chiral symmetry breaking, duality in the $\overline{Q}q$ channel and $b \to \overline{c}cs$ decays
title_full Chiral symmetry breaking, duality in the $\overline{Q}q$ channel and $b \to \overline{c}cs$ decays
title_fullStr Chiral symmetry breaking, duality in the $\overline{Q}q$ channel and $b \to \overline{c}cs$ decays
title_full_unstemmed Chiral symmetry breaking, duality in the $\overline{Q}q$ channel and $b \to \overline{c}cs$ decays
title_short Chiral symmetry breaking, duality in the $\overline{Q}q$ channel and $b \to \overline{c}cs$ decays
title_sort chiral symmetry breaking, duality in the $\overline{q}q$ channel and $b \to \overline{c}cs$ decays
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0550-3213(97)00122-3
http://cds.cern.ch/record/313725
work_keys_str_mv AT blokb chiralsymmetrybreakingdualityintheoverlineqqchannelandbtooverlineccsdecays
AT shifmanmikhaila chiralsymmetrybreakingdualityintheoverlineqqchannelandbtooverlineccsdecays
AT uraltsevn chiralsymmetrybreakingdualityintheoverlineqqchannelandbtooverlineccsdecays

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