The decay of the narrow resonance (B) over bar (s2)*(0) -> B(-)K(+)can be used to determine the B- momentum in partially reconstructed decays without any assumptions on the decay products of the r meson. This technique is employed for the first time to distinguish contributions from D-0, D*(0), and higher-mass charmed states (D**(0)) in semileptonic B- decays by using the missing-mass distribution. The measurement is performed using a data sample corresponding to an integrated luminosity of 3.0 fb(-1) collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV. The resulting branching fractions relative to the inclusive B- -> (DX)-X-0 mu(-)(nu) over bar (mu) are f(D)(0)= B(B- -> D-0 mu(-)(nu) over bar mu/B(B- -> (DX)-X-0 mu(-)(nu) over bar (mu)) = 0.25 +/- 0.06, f (D)**(0) = B(B- -> (D**(0) -> (DX)-X-0)mu(-)(nu) over bar (mu))/B(B--> (DX)-X-0 mu(-)(nu) over bar (mu)) = 0.21 +/- 0.07, with f(D)*(0) = 1 - f(D)(0) - f(D)**(0) making up the remainder.
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2019). Measurement of the relative B- -> D-0/D*(0)/D**(0)mu(-)(nu)over-bar(mu) branching fractions using B- mesons from <(B)over bar >(S2)*(0) decays. PHYSICAL REVIEW D, 99(9) [10.1103/PhysRevD.99.092009].
Measurement of the relative B- -> D-0/D*(0)/D**(0)mu(-)(nu)over-bar(mu) branching fractions using B- mesons from <(B)over bar >(S2)*(0) decays
Archilli, F.;Santovetti, E.Membro del Collaboration Group
;
2019-01-01
Abstract
The decay of the narrow resonance (B) over bar (s2)*(0) -> B(-)K(+)can be used to determine the B- momentum in partially reconstructed decays without any assumptions on the decay products of the r meson. This technique is employed for the first time to distinguish contributions from D-0, D*(0), and higher-mass charmed states (D**(0)) in semileptonic B- decays by using the missing-mass distribution. The measurement is performed using a data sample corresponding to an integrated luminosity of 3.0 fb(-1) collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV. The resulting branching fractions relative to the inclusive B- -> (DX)-X-0 mu(-)(nu) over bar (mu) are f(D)(0)= B(B- -> D-0 mu(-)(nu) over bar mu/B(B- -> (DX)-X-0 mu(-)(nu) over bar (mu)) = 0.25 +/- 0.06, f (D)**(0) = B(B- -> (D**(0) -> (DX)-X-0)mu(-)(nu) over bar (mu))/B(B--> (DX)-X-0 mu(-)(nu) over bar (mu)) = 0.21 +/- 0.07, with f(D)*(0) = 1 - f(D)(0) - f(D)**(0) making up the remainder.| File | Dimensione | Formato | |
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