Aaij, R;
Adeva, B;
Adinolfi, M;
Ajaltouni, Z;
Akar, S;
Albrecht, J;
Alessio, F;
... Zucchelli, S; + view all
(2017)
Measurement of B-s(0) and D-s(-) Meson Lifetimes.
Physical Review Letters
, 119
(10)
, Article 101801. 10.1103/PhysRevLett.119.101801.
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Abstract
We report on a measurement of the flavor-specific B 0 s 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 B 0 s → D ( * ) − s μ + ν μ decays are partially reconstructed in the K + K − π − μ + final state. The B 0 s and D − s natural widths are determined using, as a reference, kinematically similar B 0 → D ( * ) − μ + ν μ decays reconstructed in the same final state. The resulting differences between widths of B 0 s and B 0 mesons and of D − s and D − mesons are Δ Γ ( B ) = − 0.0115 ± 0.0053 ( stat ) ± 0.0041 ( syst ) ps − 1 and Δ Γ ( D ) = 1.0131 ± 0.0117 ( stat ) ± 0.0065 ( syst ) ps − 1 , respectively. Combined with the known B 0 and D − lifetimes, these yield the flavor-specific B 0 s lifetime, τ fs B 0 s = 1.547 ± 0.013 ( stat ) ± 0.010 ( syst ) ± 0.004 ( τ B ) ps and the D − s lifetime, τ D − s = 0.5064 ± 0.0030 ( stat ) ± 0.0017 ( syst ) ± 0.0017 ( τ D ) ps . The last uncertainties originate from the limited knowledge of the B 0 and D − lifetimes. The results improve upon current determinations.
| Type: | Article |
|---|---|
| Title: | Measurement of B-s(0) and D-s(-) Meson Lifetimes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.119.101801 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.119.101801 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10054181 |
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