The differential branching fraction with respect to the dimuon invariant mass squared, and the CP asymmetry of the B± → π±μ+μ− decay are measured for the first time. The CKM matrix elements |Vtd| and |Vts|, and the ratio |Vtd/Vts| are determined. The analysis is performed using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The total branching fraction and CP asymmetry of B± → π±μ+μ− decays are measured to be (Formula presented.) where the first uncertainties are statistical and the second are systematic. These are the most precise measurements of these observables to date, and they are compatible with the predictions of the Standard Model.

The LHCb collaboration, N., Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., et al. (2015). First measurement of the differential branching fraction and CP asymmetry of the B± → π±μ+ μ− decay. JOURNAL OF HIGH ENERGY PHYSICS, 2015(10) [10.1007/JHEP10(2015)034].

First measurement of the differential branching fraction and CP asymmetry of the B± → π±μ+ μ− decay

Belloli, N;Borsato, M;Calvi, M;Carniti, P;Cassina, L;Gotti, C;Grillo, L;Khanji, B;Martinelli, M;Petruzzo, M;
2015

Abstract

The differential branching fraction with respect to the dimuon invariant mass squared, and the CP asymmetry of the B± → π±μ+μ− decay are measured for the first time. The CKM matrix elements |Vtd| and |Vts|, and the ratio |Vtd/Vts| are determined. The analysis is performed using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The total branching fraction and CP asymmetry of B± → π±μ+μ− decays are measured to be (Formula presented.) where the first uncertainties are statistical and the second are systematic. These are the most precise measurements of these observables to date, and they are compatible with the predictions of the Standard Model.
Articolo in rivista - Articolo scientifico
B physics; Branching fraction; CP violation; Hadron-Hadron Scattering; Rare decay; Nuclear and High Energy Physics
English
2015
2015
10
34
open
The LHCb collaboration, N., Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., et al. (2015). First measurement of the differential branching fraction and CP asymmetry of the B± → π±μ+ μ− decay. JOURNAL OF HIGH ENERGY PHYSICS, 2015(10) [10.1007/JHEP10(2015)034].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/187896
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