Precise predictions for B -> Xs l+ l- in the large q2 region

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The inclusive B -> Xs l+ l- decay rate in the large q2 region (q2> m_psi'2) receives significant nonperturbative corrections. The resulting uncertainties can be drastically reduced by normalizing the rate to the B -> Xu l nu rate with the same q2 cut, which allows for much improved tests of short distance physics. We calculate this ratio, including the order 1/m_b3 nonperturbative corrections and the analytically known NNLO perturbative corrections. Since in the large q2 region an inclusive measurement may be feasible via a sum over exclusive states, our results could be useful for measurements at LHCb and possibly ... continued below

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Ligeti, Zoltan; Ligeti, Zoltan & Tackmann, Frank J. July 12, 2007.

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The inclusive B -> Xs l+ l- decay rate in the large q2 region (q2> m_psi'2) receives significant nonperturbative corrections. The resulting uncertainties can be drastically reduced by normalizing the rate to the B -> Xu l nu rate with the same q2 cut, which allows for much improved tests of short distance physics. We calculate this ratio, including the order 1/m_b3 nonperturbative corrections and the analytically known NNLO perturbative corrections. Since in the large q2 region an inclusive measurement may be feasible via a sum over exclusive states, our results could be useful for measurements at LHCb and possibly for studies of B -> Xd l+ l-.

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  • Journal Name: Physics Letters B; Journal Volume: 653; Journal Issue: 5-6; Related Information: Journal Publication Date: 27 September 2007

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  • Report No.: LBNL-378E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 934494
  • Archival Resource Key: ark:/67531/metadc897686

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Office of Scientific & Technical Information Technical Reports

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Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 12, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 3, 2016, 4:28 p.m.

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Ligeti, Zoltan; Ligeti, Zoltan & Tackmann, Frank J. Precise predictions for B -> Xs l+ l- in the large q2 region, article, July 12, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc897686/: accessed May 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.