The ratio of the B0s and B0 fragmentation fractions, fs=fd, in proton-proton collisions at the LHC, isobtained as a function of B-meson transverse momentum and collision center-of-mass energy from thecombined analysis of different B-decay channels measured by the LHCb experiment. The results aredescribed by a linear function of the meson transverse momentum or with a function inspired by Tsallisstatistics. Precise measurements of the branching fractions of the B0s → J=ψϕ and B0s → D−s πþ decays areperformed, reducing their uncertainty by about a factor of 2 with respect to previous world averages.Numerous B0s decay branching fractions, measured at the LHCb experiment, are also updated using the newvalues of fs=fd and branching fractions of normalization channels. These results reduce a major source ofsystematic uncertainty in several searches for new physics performed through measurements of B0sbranching fractions.

Precise measurement of the fs /fd ratio of fragmentation fractions and of Bs0 decay branching fractions / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Aliouche, Z., Alkhazov, G., Cartelle, P.A., Amato, S., Amhis, Y., An, L., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0029. - 104:3(2021). [10.1103/PhysRevD.104.032005]

Precise measurement of the fs /fd ratio of fragmentation fractions and of Bs0 decay branching fractions

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2021

Abstract

The ratio of the B0s and B0 fragmentation fractions, fs=fd, in proton-proton collisions at the LHC, isobtained as a function of B-meson transverse momentum and collision center-of-mass energy from thecombined analysis of different B-decay channels measured by the LHCb experiment. The results aredescribed by a linear function of the meson transverse momentum or with a function inspired by Tsallisstatistics. Precise measurements of the branching fractions of the B0s → J=ψϕ and B0s → D−s πþ decays areperformed, reducing their uncertainty by about a factor of 2 with respect to previous world averages.Numerous B0s decay branching fractions, measured at the LHCb experiment, are also updated using the newvalues of fs=fd and branching fractions of normalization channels. These results reduce a major source ofsystematic uncertainty in several searches for new physics performed through measurements of B0sbranching fractions.
2021
Charm physics, Hadron-Hadron scattering (experiments), QCD, Spectroscopy
01 Pubblicazione su rivista::01a Articolo in rivista
Precise measurement of the fs /fd ratio of fragmentation fractions and of Bs0 decay branching fractions / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Aliouche, Z., Alkhazov, G., Cartelle, P.A., Amato, S., Amhis, Y., An, L., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0029. - 104:3(2021). [10.1103/PhysRevD.104.032005]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1579982
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