The ratio of the Bs0 and B0 fragmentation fractions, fs/fd, in proton-proton collisions at the LHC, is obtained as a function of B-meson transverse momentum and collision center-of-mass energy from the combined analysis of different B-decay channels measured by the LHCb experiment. The results are described by a linear function of the meson transverse momentum or with a function inspired by Tsallis statistics. Precise measurements of the branching fractions of the Bs0→J/ψφ and Bs0→Ds-π+ decays are performed, reducing their uncertainty by about a factor of 2 with respect to previous world averages. Numerous Bs0 decay branching fractions, measured at the LHCb experiment, are also updated using the new values of fs/fd and branching fractions of normalization channels. These results reduce a major source of systematic uncertainty in several searches for new physics performed through measurements of Bs0 branching 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 2470-0010. - 104:3(2021), pp. 0-0. [10.1103/PhysRevD.104.032005]

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

Bizzeti A.;
2021

Abstract

The ratio of the Bs0 and B0 fragmentation fractions, fs/fd, in proton-proton collisions at the LHC, is obtained as a function of B-meson transverse momentum and collision center-of-mass energy from the combined analysis of different B-decay channels measured by the LHCb experiment. The results are described by a linear function of the meson transverse momentum or with a function inspired by Tsallis statistics. Precise measurements of the branching fractions of the Bs0→J/ψφ and Bs0→Ds-π+ decays are performed, reducing their uncertainty by about a factor of 2 with respect to previous world averages. Numerous Bs0 decay branching fractions, measured at the LHCb experiment, are also updated using the new values of fs/fd and branching fractions of normalization channels. These results reduce a major source of systematic uncertainty in several searches for new physics performed through measurements of Bs0 branching fractions.
2021
104
3
0
0
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 2470-0010. - 104:3(2021), pp. 0-0. [10.1103/PhysRevD.104.032005]
Aaij, R.; Beteta, C. A.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C. A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Aless...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1354196
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