Publicação: Lepton transverse polarization in the B -> Dl nu(l) decay due to the electromagnetic final state interaction
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Data
2002-10-01
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Coorientador
Pós-graduação
Curso de graduação
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American Physical Soc
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Artigo
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The effect of lepton transverse polarization in B-0-->D(-)l(+)nu(l), B+-->(D) over bar (0)l(+)nu(l) decays (l=tau,mu) is analyzed within the framework of the standard model in the leading order of heavy quark effective theory. It is shown that a nonzero transverse polarization appears due to the electromagnetic final state interaction. The diagrams with intermediate D,D* mesons contributing to the nonvanishing P-T are considered. Regarding only the contribution of these mesons, the values of the tau-lepton transverse polarization averaged over the physical region in the B-0-->D(-)tau(+)nu(l) and B+-->(D) over bar (0)tau(+)nu(l) decays are equal to 2.60x10(-3) and -1.59x10(-3), respectively. In the case of muon decay modes the values of [P-T] are equal to 2.97x10(-4) and -6.79x10(-4).
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Physical Review D. College Pk: American Physical Soc, v. 66, n. 7, 8 p., 2002.
