Semileptonic Form-factors from B-> K* gamma Decays in the Large Energy Limit

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Making use of the measurement of the $B\to K^*\gamma$ branching ratio together with the relations following from the limit of high recoil energy, we obtain stringent constraints on the values of the form-factors entering in heavy-to-light $B\to V\ell\ell'$ processes such as $B\to K^*\ell^+\ell^-$, $B\to K^*\nu \bar\nu$ and $B\to \rho\ell\nu$ decays. We show that the symmetry predictions, when combined with the experimental information on radiative decays, specify a severely restricted set of values for the vector and axial-vector form-factors evaluated at zero momentum transfer, $q^2=0$. These constraints can be used to test model calculations and to improve our understanding of the ... continued below

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Burdman, Gustavo & Hiller, Gudrun November 21, 2000.

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Making use of the measurement of the $B\to K^*\gamma$ branching ratio together with the relations following from the limit of high recoil energy, we obtain stringent constraints on the values of the form-factors entering in heavy-to-light $B\to V\ell\ell'$ processes such as $B\to K^*\ell^+\ell^-$, $B\to K^*\nu \bar\nu$ and $B\to \rho\ell\nu$ decays. We show that the symmetry predictions, when combined with the experimental information on radiative decays, specify a severely restricted set of values for the vector and axial-vector form-factors evaluated at zero momentum transfer, $q^2=0$. These constraints can be used to test model calculations and to improve our understanding of the $q^2$-dependence of semileptonic form-factors. We stress that the constraints remain stringent even when corrections are taken into account.

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  • Journal Name: Physical Review D; Related Information: Journal Publication Date: published 27 April 2001

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  • Report No.: LBNL-49151
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 965509
  • Archival Resource Key: ark:/67531/metadc931299

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  • November 21, 2000

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  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 18, 2016, 3:23 p.m.

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Burdman, Gustavo & Hiller, Gudrun. Semileptonic Form-factors from B-> K* gamma Decays in the Large Energy Limit, article, November 21, 2000; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc931299/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.