A precision measurement of the B+c meson mass is performed using protonproton collision data collected with the LHCb experiment at centre-of-mass energies of 7, 8and 13 TeV, corresponding to a total integrated luminosity of 9.0 fb−1. The B+c mesonsare reconstructed via the decays B+c → J/ψ π+, B+c → J/ψ π+π−π+, B+c → J/ψ ppπ¯+,B+c → J/ψ D+s, B+c → J/ψ D0K+ and B+c → B0sπ+. Combining the results of the individualdecay channels, the B+c mass is measured to be 6274.47 ± 0.27 (stat) ± 0.17 (syst) MeV/c2.This is the most precise measurement of the B+c mass to date. The difference between theB+c and B0s meson masses is measured to be 907.75 ± 0.37 (stat) ± 0.27 (syst) MeV/c2.

Precision measurement of the Bc+ meson mass / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amhis, Y., An, L., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2020:7(2020). [10.1007/JHEP07(2020)123]

Precision measurement of the Bc+ meson mass

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2020

Abstract

A precision measurement of the B+c meson mass is performed using protonproton collision data collected with the LHCb experiment at centre-of-mass energies of 7, 8and 13 TeV, corresponding to a total integrated luminosity of 9.0 fb−1. The B+c mesonsare reconstructed via the decays B+c → J/ψ π+, B+c → J/ψ π+π−π+, B+c → J/ψ ppπ¯+,B+c → J/ψ D+s, B+c → J/ψ D0K+ and B+c → B0sπ+. Combining the results of the individualdecay channels, the B+c mass is measured to be 6274.47 ± 0.27 (stat) ± 0.17 (syst) MeV/c2.This is the most precise measurement of the B+c mass to date. The difference between theB+c and B0s meson masses is measured to be 907.75 ± 0.37 (stat) ± 0.27 (syst) MeV/c2.
2020
B physics, Hadron-Hadron scattering (experiments), QCD, Spectroscopy
01 Pubblicazione su rivista::01a Articolo in rivista
Precision measurement of the Bc+ meson mass / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amhis, Y., An, L., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2020:7(2020). [10.1007/JHEP07(2020)123]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1580262
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