Reduction of Quark Mass Scheme Dependence in B bar -> Xs gamma at the NNLL Level

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The uncertainty of the theoretical prediction of the B {yields} X{sub s}{gamma} branching ratio at NLL level is dominated by the charm mass renormalization scheme ambiguity. In this paper we calculate those NNLL terms which are related to the renormalization of m{sub c}, in order to get an estimate of the corresponding uncertainty at the NNLL level. We find that these terms significantly reduce (by typically a factor of two) the error on BR(B {yields} X{sub s}{gamma}) induced by the definition of m{sub c}. Taking into account the experimental accuracy of around 10% and the future prospects of the B ... continued below

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13 pages

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Asatrian, H.M.; Inst., /Yerevan Phys.; Greub, C.; U., /Bern; Hovhannisyan, A.; Inst., /Yerevan Phys. et al. June 20, 2005.

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The uncertainty of the theoretical prediction of the B {yields} X{sub s}{gamma} branching ratio at NLL level is dominated by the charm mass renormalization scheme ambiguity. In this paper we calculate those NNLL terms which are related to the renormalization of m{sub c}, in order to get an estimate of the corresponding uncertainty at the NNLL level. We find that these terms significantly reduce (by typically a factor of two) the error on BR(B {yields} X{sub s}{gamma}) induced by the definition of m{sub c}. Taking into account the experimental accuracy of around 10% and the future prospects of the B factories, we conclude that a NNLL calculation would increase the sensitivity of the observable B {yields} X{sub s}{gamma} to possible new degrees of freedom beyond the SM significantly.

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13 pages

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  • Journal Name: Phys.Lett.B619:322-332,2005

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  • Report No.: SLAC-PUB-11177
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 890350
  • Archival Resource Key: ark:/67531/metadc874863

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  • June 20, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 1, 2016, 1:46 p.m.

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Asatrian, H.M.; Inst., /Yerevan Phys.; Greub, C.; U., /Bern; Hovhannisyan, A.; Inst., /Yerevan Phys. et al. Reduction of Quark Mass Scheme Dependence in B bar -> Xs gamma at the NNLL Level, article, June 20, 2005; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc874863/: accessed December 10, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.