We analyze the relativistic corrections to annihilation rates of S-wave
quarkonia within the framework of NRQCD. We show that order v^2 corrections can
be expressed in terms of the heavy quark pole mass and the quarkonium mass. The
ratio of hadronic to radiative annihilation rates for eta\_b and eta\_c can
therefore be predicted accurately. The contributions of color-octet operators
to the hadronic decay rates of spin-triplet quarkonia are shown to be
significant, even though they arise at order v^4 in the velocity expansion. We
provide a rough estimate of the color-octet contributions and extract the value
of alpha\_s from the experimental data on Upsilon decays.
%0 Journal Article
%1 Gremm1997Annihilation
%A Gremm, Martin
%A Kapustin, Anton
%D 1997
%K continuum, nrqcd, pheno
%T Annihilation of S-wave quarkonia and the measurement of alpha\_s
%U http://arxiv.org/abs/hep-ph/9701353
%X We analyze the relativistic corrections to annihilation rates of S-wave
quarkonia within the framework of NRQCD. We show that order v^2 corrections can
be expressed in terms of the heavy quark pole mass and the quarkonium mass. The
ratio of hadronic to radiative annihilation rates for eta\_b and eta\_c can
therefore be predicted accurately. The contributions of color-octet operators
to the hadronic decay rates of spin-triplet quarkonia are shown to be
significant, even though they arise at order v^4 in the velocity expansion. We
provide a rough estimate of the color-octet contributions and extract the value
of alpha\_s from the experimental data on Upsilon decays.
@article{Gremm1997Annihilation,
abstract = {{We analyze the relativistic corrections to annihilation rates of S-wave
quarkonia within the framework of NRQCD. We show that order v^2 corrections can
be expressed in terms of the heavy quark pole mass and the quarkonium mass. The
ratio of hadronic to radiative annihilation rates for eta\_b and eta\_c can
therefore be predicted accurately. The contributions of color-octet operators
to the hadronic decay rates of spin-triplet quarkonia are shown to be
significant, even though they arise at order v^4 in the velocity expansion. We
provide a rough estimate of the color-octet contributions and extract the value
of alpha\_s from the experimental data on Upsilon decays.}},
added-at = {2019-02-23T22:09:48.000+0100},
archiveprefix = {arXiv},
author = {Gremm, Martin and Kapustin, Anton},
biburl = {https://www.bibsonomy.org/bibtex/23cce4ca5fb1619f825f867e8831ebcf7/cmcneile},
citeulike-article-id = {4300435},
citeulike-linkout-0 = {http://arxiv.org/abs/hep-ph/9701353},
citeulike-linkout-1 = {http://arxiv.org/pdf/hep-ph/9701353},
comment = {Has all the equations},
day = 16,
eprint = {hep-ph/9701353},
interhash = {54ef03c909b913a20b5794e09fa1ade3},
intrahash = {3cce4ca5fb1619f825f867e8831ebcf7},
keywords = {continuum, nrqcd, pheno},
month = apr,
posted-at = {2009-04-11 13:19:18},
priority = {2},
timestamp = {2019-02-23T22:15:27.000+0100},
title = {{Annihilation of S-wave quarkonia and the measurement of alpha\_s}},
url = {http://arxiv.org/abs/hep-ph/9701353},
year = 1997
}