Bibcode
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Grossmann, J.; Hrubec, J.; Jeitler, M.; König, A.; Krammer, N.; Krätschmer, I.; Liko, D.; Madlener, T.; Mikulec, I.; Pree, E.; Rad, N.; Rohringer, H.; Schieck, J.; Schöfbeck, R.; Spanring, M.; Spitzbart, D.; Waltenberger, W.; Wittmann, J.; Wulz, C.-E.; Zarucki, M.; Dydyshka, Y.; Mossolov, V.; Suarez Gonzalez, J.; De Wolf, E. A.; Di Croce, D.; Janssen, X.; Lauwers, J.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; De Bruyn, I.; De Clercq, J.; Deroover, K.; Flouris, G.; Lontkovskyi, D.; Lowette, S.; Moortgat, S.; Moreels, L.; Python, Q.; Skovpen, K.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Beghin, D.; Brun, H.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Dorney, B.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Luetic, J.; Maerschalk, T.; Marinov, A.; Randle-conde, A.; Seva, T.; Vander Velde, C.; Vanlaer, P.; Vannerom, D.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Gul, M.; Khvastunov, I.; Poyraz, D.; Roskas, C.; Salva, S.; Tytgat, M.; Verbeke, W.; Zaganidis, N.; Bakhshiansohi, H.; Bondu, O.; Brochet, S.; Bruno, G. et al.
Bibliographical reference
The European Physical Journal C, Volume 78, Issue 6, article id. 457, 28 pp.
Advertised on:
6
2018
Citations
18
Refereed citations
8
Description
Measurements are presented of the lifetimes of the {B^0}, B^0_{s},
Λ_{b} ^0, and B_{c}^+ hadrons using the decay channels {B^0}
→ J/ψ K^{*}(892)0, B^0 → J/ψ K^0_S, B^0_{s}
→ J/ψ {π ^+}{π ^-}, B^0_{s} → J/ψ {φ
(1020)}, Λ_{b}^0 → J/ψ Λ0, and B_{c}^+
→ J/ψ {π ^+}. The data sample, corresponding to an
integrated luminosity of 19.7 {fb}^ {-1}, was collected by the CMS
detector at the LHC in proton-proton collisions at √{s}=8 {Te} {V}
. The {B^0} lifetime is measured to be 453.0 ± 1.6 {(stat)}
± 1.8 {(syst)} μ {m} in J/ψ K^{*}(892)0and
457.8 ± 2.7 {(stat)} ± 2.8 {(syst)} μ {m} in J/ψ
{K^0_S}, which results in a combined measurement of cτ _{{B^0}} =
454.1 ± 1.4 {(stat)} ± 1.7 {(syst)} μ {m} . The
effective lifetime of the B^0_{s} meson is measured in two decay modes,
with contributions from different amounts of the heavy and light
eigenstates. This results in two different measured lifetimes: cτ
_{B^0_{s} → J/ψ {π ^+}{π ^-}} = 502.7 ± 10.2
{(stat)} ± 3.4 {(syst)} μ {m} and cτ _{B^0_{s} →
J/ψ {φ (1020)}} = 443.9 ± 2.0 {(stat)} ± 1.5
{(syst)} μ {m} . The {Λ }_{b} ^0 lifetime is found to be 442.9
± 8.2 {(stat)} ± 2.8 {(syst)} μ {m} . The precision
from each of these channels is as good as or better than previous
measurements. The B_{c}^+ lifetime, measured with respect to the
{B+} to reduce the systematic uncertainty, is 162.3 ±
7.8 {(stat)} ± 4.2 {(syst)} ± 0.1 (τ
_{{B+}}) μ {m} . All results are in agreement with current
world-average values.