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Quark mass dependence of the X(3872) binding energy

✍ Scribed by Baru, V.; Epelbaum, E.; Filin, A.A.; Hanhart, C.; Meißner, U.-G.; Nefediev, A.V.


Book ID
125429220
Publisher
Elsevier Science
Year
2013
Tongue
English
Weight
426 KB
Volume
726
Category
Article
ISSN
0370-2693

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Strange quark mass dependence of the Tau
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The perturbative quark mass corrections to the tau hadronic width are studied to O(& &). Including up to dimension four corrections, we get m,(4 GeV') = (143 f 42) MeV [m,(l GeV') = (193 ZIZ 59) MeV 1. Possible improvements to reduce the theoretical uncertainty are pointed out.