%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 }