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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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