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Two-loop calculation of the anomalous dimension of the axial current with static heavy quarks
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Two-loop calculation of the anomalous dimension of the axial current with static heavy quarks
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| dc.contributor.author | Giménez Gómez, Vicente | |
| dc.date.accessioned | 2014-09-25T11:03:30Z | |
| dc.date.available | 2014-09-25T11:03:30Z | |
| dc.date.issued | 1992 | |
| dc.identifier.citation | Giménez Gómez, Vicente 1992 Two-loop calculation of the anomalous dimension of the axial current with static heavy quarks Nuclear Physics B 375 3 582 624 | |
| dc.identifier.uri | http://hdl.handle.net/10550/38966 | |
| dc.description.abstract | A method to perform two-loop calculations in Eichten's effective field theory for heavy quarks is developed. The anomalous dimension of the axial current for static heavy quarks is calculated at two loops. For N = 3, we get gamma(A)(2) = - 1/36[127/2 + 28-xi(2) - 5N(f)]. This result is very important to understand completely the physical significance of the lattice measurement of the decay constant of the B meson. The two-loop correction generated by gamma(A)(2) turns out to be small, less than 1% for four quark flavours, so that the value of the decay constant of the B meson does not need in practice renormalization group improvement. As extra results, the self-energy renormalization constant at two-loop level for a heavy static quark and that for the coupling of a heavy quark to a gluon are obtained. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Nuclear Physics B, 1992, vol. 375, num. 3, p. 582-624 | |
| dc.subject | Física | |
| dc.title | Two-loop calculation of the anomalous dimension of the axial current with static heavy quarks | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2014-09-25T11:03:31Z | |
| dc.identifier.doi | 10.1016/0550-3213(92)90112-O | |
| dc.identifier.idgrec | 099546 | |
| dc.rights.accessRights | open access | es_ES |
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