LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Costa Sobral, Cayo, Crocombe, Andrew, Gershon, T. J., Kreps, Michal, Latham, Thomas, Loh, David, Mathad, Abhijit , O'Hanlon, Daniel P., Poluektov, Anton, Qian, W., Wallace, Charlotte and Wicht, Jean). (2017) Measurement of B_{s}^{0} and D_{s}^{-} meson lifetimes. Physical Review Letters, 119 (10). 101801. doi:10.1103/PhysRevLett.119.101801 ISSN 0031-9007.
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Abstract
We report on a measurement of the flavor-specific B_{s}^{0} 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_{s}^{0}→D_{s}^{(*)-}μ^{+}ν_{μ} decays are partially reconstructed in the K^{+}K^{-}π^{-}μ^{+} final state. The B_{s}^{0} 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_{s}^{0} 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_{s}^{0} lifetime, τ_{B_{s}^{0}}^{fs}=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.
Item Type: | Journal Article |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics |
SWORD Depositor: | Library Publications Router |
Journal or Publication Title: | Physical Review Letters |
Publisher: | American Physical Society |
ISSN: | 0031-9007 |
Official Date: | 8 September 2017 |
Dates: | Date Event 8 September 2017 Published 8 September 2017 Available |
Volume: | 119 |
Number: | 10 |
Article Number: | 101801 |
DOI: | 10.1103/PhysRevLett.119.101801 |
Status: | Peer Reviewed |
Publication Status: | Published |
Access rights to Published version: | Open Access (Creative Commons open licence) |
URI: | https://wrap.warwick.ac.uk/93069/ |
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