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.87.071101I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.