Universidad Complutense de Madrid
E-Prints Complutense

Heavy quark fluorescence



Último año

Torres Rincón, Juan Miguel y Llanes Estrada, Felipe J. (2010) Heavy quark fluorescence. Physical Review Letters, 105 (2). ISSN 0031-9007

Vista previa

URL Oficial: http://dx.doi.org/10.1103/PhysRevLett.105.022003

URLTipo de URL


Heavy hadrons containing heavy quarks (for example, Y mesons) feature a scale separation between the heavy-quark mass and the QCD scale that controls the effective masses of lighter constituents. As in ordinary molecules, the deexcitation of the lighter, faster degrees of freedom leaves the velocity distribution of the heavy quarks unchanged, populating the available decay channels in qualitatively predictable ways. Automatically an application of the Franck-Condon principle of molecular physics explains several puzzling results of Y(5S) decays as measured by the Belle Collaboration, such as the high rate of B(s)*(B) over bar (s)* versus B(s)*(B) over bar (s) production, the strength of three-body B*(B) over bar pi decays, or the dip in B momentum shown in these decays. We argue that the data show the first Sturm-Liouville zero of the Y(5S) quantum-mechanical squared wave function and provide evidence for a largely b (b) over bar composition of this meson.

Tipo de documento:Artículo
Información Adicional:

© 2010 The American Physical Society.
We thank I. Scimemi, C. Hanhart, A. Dobado, and J. Soto for useful conversations, Alexey Drutskoy for insight into the published Belle measurements, and Grants No. FPA 2008 00592, No. FIS2008-01323, plus FPU graduate support for J. T. (Spain), and No. 227431, HadronPhysics2 (EU).

Palabras clave:Gauge Qcd, Decays, Mesons, Model
Materias:Ciencias > Física
Código ID:22518
Depositado:23 Jul 2013 12:33
Última Modificación:07 Feb 2014 10:47

Descargas en el último año

Sólo personal del repositorio: página de control del artículo