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New predictions for inclusive heavy-quarkonium P-wave decays
Brambilla, Nora; Eiras, Dolors; Pineda, Antonio; Soto Riera, Joan; Vairo, Antonio
Universitat de Barcelona
We show that some nonrelativistic quantum chromodynamics color-octet matrix elements can be written in terms of (derivatives of) wave functions at the origin and of nonperturbative universal constants once the factorization between the soft and ultrasoft scales is achieved by using an effective field theory where only ultrasoft degrees of freedom are kept as dynamical entities. This allows us to derive a new set of relations between inclusive heavy-quarkonium P-wave decays into light hadrons with different principal quantum numbers and with different heavy flavors. In particular, we can estimate the ratios of the decay widths of bottomonium P-wave states from charmonium data.
12-06-2010
Cromodinàmica quàntica
Fenomenologia (Física)
Partícules (Física nuclear)
Quarks
Quantum chromodynamics
Phenomenological theory (Physics)
Particles (Nuclear physics)
Quarks
(c) American Physical Society, 2002
Artículo
American Physical Society
         

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