RT Journal Article
T1 Heavy quark fluorescence
A1 Torres Rincón, Juan Miguel
A1 Llanes Estrada, Felipe José
AB 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.
PB American Physical Society
SN 0031-9007
YR 2010
FD 2010-07-09
LK https://hdl.handle.net/20.500.14352/43940
UL https://hdl.handle.net/20.500.14352/43940
LA eng
NO © 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).
DS Docta Complutense
RD 6 abr 2025