We report on a measurement of the flavor-specific B0s lifetime and of the D−s lifetime using proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to 3.0  fb−1 of integrated luminosity. Approximately 407 000 B0s→D(*)−sμ+νμ decays are partially reconstructed in the K+K−π−μ+ final state. The B0s and D− natural widths are determined using, as a reference, kinematically similar B0→D(*)−μ+νμ decays reconstructed in the same final state. The resulting differences between widths of B0s and B0 mesons and of D−s and D− mesons are ΔΓ(B)=−0.0115±0.0053(stat)±0.0041(syst)  ps−1 and ΔΓ(D)=1.0131±0.0117(stat)±0.0065(syst)  ps−1, respectively. Combined with the known B0 and D− lifetimes, these yield the flavor-specific B0s lifetime, τfsB0s=1.547±0.013(stat)±0.010(syst)±0.004(τB)  ps and the D−s lifetime, τD−s=0.5064±0.0030(stat)±0.0017(syst)±0.0017(τD)  ps. The last uncertainties originate from the limited knowledge of the B0 and D− lifetimes. The results improve upon current determinations.

Measurement of Bs0 and Ds- Meson Lifetimes / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 119:10(2017). [10.1103/PhysRevLett.119.101801]

Measurement of Bs0 and Ds- Meson Lifetimes

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2017

Abstract

We report on a measurement of the flavor-specific B0s lifetime and of the D−s lifetime using proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to 3.0  fb−1 of integrated luminosity. Approximately 407 000 B0s→D(*)−sμ+νμ decays are partially reconstructed in the K+K−π−μ+ final state. The B0s and D− natural widths are determined using, as a reference, kinematically similar B0→D(*)−μ+νμ decays reconstructed in the same final state. The resulting differences between widths of B0s and B0 mesons and of D−s and D− mesons are ΔΓ(B)=−0.0115±0.0053(stat)±0.0041(syst)  ps−1 and ΔΓ(D)=1.0131±0.0117(stat)±0.0065(syst)  ps−1, respectively. Combined with the known B0 and D− lifetimes, these yield the flavor-specific B0s lifetime, τfsB0s=1.547±0.013(stat)±0.010(syst)±0.004(τB)  ps and the D−s lifetime, τD−s=0.5064±0.0030(stat)±0.0017(syst)±0.0017(τD)  ps. The last uncertainties originate from the limited knowledge of the B0 and D− lifetimes. The results improve upon current determinations.
2017
Bottom mesons, Charmed mesons
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of Bs0 and Ds- Meson Lifetimes / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 119:10(2017). [10.1103/PhysRevLett.119.101801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074663
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