title: New predictions for inclusive heavy-quarkonium P-wave decays.
abstract: 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.
authors.affiliation: INFN and Dipartimento di Fisica dell'Università di Milano, via Celoria 16, 20133 Milan, Italy.
authors.forename: Nora
authors.initials: N
authors.lastname: Brambilla
authors.forename: Dolors
authors.initials: D
authors.lastname: Eiras
authors.forename: Antonio
authors.initials: A
authors.lastname: Pineda
authors.forename: Joan
authors.initials: J
authors.lastname: Soto
authors.forename: Antonio
authors.initials: A
authors.lastname: Vairo