UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Measurement of B-s(0) and D-s(-) Meson Lifetimes

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. Green open access

[img]
Preview
Text
PhysRevLett.119.101801.pdf - ["content_typename_Published version" not defined]

Download (324kB) | Preview

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
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > UCL GOS Institute of Child Health
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > UCL GOS Institute of Child Health > ICH Infect, Imm, Infla. and Physio Med
URI: http://discovery.ucl.ac.uk/id/eprint/10054181
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item