TY - JOUR
T1 - Measurements of the B+, B0, B0
s meson and Λ0
b baryon lifetimes
AU - LHCb Collaboration
AU - Aaij, R.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Affolder, A.
AU - Ajaltouni, Z.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Ali, S.
AU - Alkhazov, G.
AU - Cartelle, P. Alvarez
AU - Alves, A. A.
AU - Amato, S.
AU - Amerio, S.
AU - Amhis, Y.
AU - Anderlini, L.
AU - Anderson, J.
AU - Andreassen, R.
AU - Andreotti, M.
AU - Andrews, J. E.
AU - Appleby, R. B.
AU - Gutierrez, O. Aquines
AU - Archilli, F.
AU - Artamonov, A.
AU - Artuso, M.
AU - Aslanides, E.
AU - Auriemma, G.
AU - Baalouch, M.
AU - Bachmann, S.
AU - Back, J. J.
AU - Badalov, A.
AU - Balagura, V.
AU - Baldini, W.
AU - Barlow, R. J.
AU - Barschel, C.
AU - Barsuk, S.
AU - Barter, W.
AU - Batozskaya, V.
AU - Bauer, Th
AU - Bifani, S.
AU - Griffith, P.
AU - Ilten, P.
AU - Kenyon, I. R.
AU - Lazzeroni, C.
AU - Mazurov, A.
AU - McCarthy, J.
AU - Parkinson, C. J.
AU - Pescatore, L.
AU - Popov, D.
AU - Watson, N. K.
PY - 2014/4/16
Y1 - 2014/4/16
N2 - Measurements of b-hadron lifetimes are reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb-1, collected by the LHCb detector at a centre-of-mass energy of 7TeV. Using the exclusive decays B+ → J/ψK+, B0 → J/ψK *(892)0, B0 → J/ψK0s, Λ0b → J/ψΛ and B0 s→ J/ψφ the average decay times in these modes are measured to beτB+→J/ψK+ = 1.637 ± 0.004 ± 0.003 ps,τB0→J/ψK∗0 = 1.524 ± 0.006 ± 0.004 ps,τB0→J/ψK0s= 1.499 ± 0.013 ± 0.005 ps,τΛ0b→J/ψΛ = 1.415 ± 0.027 ± 0.006 ps,τB0s→J/ψφ = 1.480 ± 0.011 ± 0.005 ps, where the first uncertainty is statistical and the second is systematic. These represent the most precise lifetime measurements in these decay modes. In addition, ratios of these lifetimes, and the ratio of the decay-width difference, ΔΓd, to the average width, Γd, in the B0 system, Δ Γ d/ Γd = -0.044 ± 0.025 ± 0.011, are reported. All quantities are found to be consistent with Standard Model expectations.
AB - Measurements of b-hadron lifetimes are reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb-1, collected by the LHCb detector at a centre-of-mass energy of 7TeV. Using the exclusive decays B+ → J/ψK+, B0 → J/ψK *(892)0, B0 → J/ψK0s, Λ0b → J/ψΛ and B0 s→ J/ψφ the average decay times in these modes are measured to beτB+→J/ψK+ = 1.637 ± 0.004 ± 0.003 ps,τB0→J/ψK∗0 = 1.524 ± 0.006 ± 0.004 ps,τB0→J/ψK0s= 1.499 ± 0.013 ± 0.005 ps,τΛ0b→J/ψΛ = 1.415 ± 0.027 ± 0.006 ps,τB0s→J/ψφ = 1.480 ± 0.011 ± 0.005 ps, where the first uncertainty is statistical and the second is systematic. These represent the most precise lifetime measurements in these decay modes. In addition, ratios of these lifetimes, and the ratio of the decay-width difference, ΔΓd, to the average width, Γd, in the B0 system, Δ Γ d/ Γd = -0.044 ± 0.025 ± 0.011, are reported. All quantities are found to be consistent with Standard Model expectations.
KW - B physics
KW - Flavor physics
KW - Hadron-hadron scattering
KW - Lifetime
UR - http://www.scopus.com/inward/record.url?scp=84901813677&partnerID=8YFLogxK
U2 - 10.1007/JHEP04(2014)114
DO - 10.1007/JHEP04(2014)114
M3 - Article
AN - SCOPUS:84901813677
SN - 1126-6708
VL - 2014
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 4
M1 - 114
ER -