A search for the decay B-s(0) -> D{*}(-/+)pi(+/-) is presented using a data sample corresponding to an integrated luminosity of 1.0 fb(-1) of pp collisions collected by LHCb. This decay is expected to be mediated by a W-exchange diagram, with little contribution from rescattering processes, and therefore a measurement of the branching fraction will help us to understand the mechanism behind related decays such as B-s(0) -> pi(+)pi(-) and B-s(0) -> D (D) over bar. Systematic uncertainties are minimized by using B-0 -> D{*}(-/+)pi(+/-) as a normalization channel. We find no evidence for a signal, and set an upper limit on the branching fraction of B(B-s(0) -> D{*}(-/+)pi(+/-) < 6.1(7.8) x 10(-6) at 90\% (95\%) confidence level. DOI: 10.1103/PhysRevD.87.071101

Search for the decay B-s(0) -> D*(-/+)pi(+/-)

R. Cardinale;FONTANELLI, FLAVIO;PATRIGNANI, CLAUDIA;PETROLINI, ALESSANDRO;M. Sannino;
2013-01-01

Abstract

A search for the decay B-s(0) -> D{*}(-/+)pi(+/-) is presented using a data sample corresponding to an integrated luminosity of 1.0 fb(-1) of pp collisions collected by LHCb. This decay is expected to be mediated by a W-exchange diagram, with little contribution from rescattering processes, and therefore a measurement of the branching fraction will help us to understand the mechanism behind related decays such as B-s(0) -> pi(+)pi(-) and B-s(0) -> D (D) over bar. Systematic uncertainties are minimized by using B-0 -> D{*}(-/+)pi(+/-) as a normalization channel. We find no evidence for a signal, and set an upper limit on the branching fraction of B(B-s(0) -> D{*}(-/+)pi(+/-) < 6.1(7.8) x 10(-6) at 90\% (95\%) confidence level. DOI: 10.1103/PhysRevD.87.071101
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/587533
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