TY - JOUR
T1 - Observation of B-s(0)-(B)over-bar(s)(0) mixing and measurement of mixing frequencies using semileptonic B decays
AU - Aaij, R.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Adrover, C.
AU - Affolder, A.
AU - Ajaltouni, Z.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Ali, S.
AU - Alkhazov, G.
AU - Cartelle, P.A.
AU - Alves, A.A.
AU - Amato, S.
AU - Amerio, S.
AU - Amhis, Y.
AU - Anderlini, L.
AU - Anderson, J.
AU - Andreassen, R.
AU - Andrews, J.E.
AU - Andrianala, F.
AU - Appleby, R.B.
AU - Gutierrez, O.A.
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 - Baesso, C.
AU - Balagura, V.
AU - Baldini, W.
AU - Barlow, R.J.
AU - Barschel, C.
AU - Barsuk, S.
AU - Barter, W.
AU - Bauer, T.
AU - Bay, A.
AU - Beddow, J.
AU - Bedeschi, F.
AU - Bediaga, I.
AU - Belogurov, S.
AU - Belous, K.
AU - Belyaev, I.
AU - Ben-Haim, E.
AU - Bencivenni, G.
AU - Benson, S.
AU - van den Brand, J.
AU - LHCb collaboration
PY - 2013/12/4
Y1 - 2013/12/4
N2 - The and B (0) mixing frequencies, Delta m (s) and Delta m (d) , are measured using a data sample corresponding to an integrated luminosity of 1.0 fb(-1) collected by the LHCb experiment in pp collisions at a centre of mass energy of 7 TeV during 2011. Around 1.8x10(6) candidate events are selected of the type (+ anything), where about half are from peaking and combinatorial backgrounds. To determine the B decay times, a correction is required for the momentum carried by missing particles, which is performed using a simulation-based statistical method. Associated production of muons or mesons allows us to tag the initial-state flavour and so to resolve oscillations due to mixing. We obtain <The hypothesis of no oscillations is rejected by the equivalent of 5.8 standard deviations for and 13.0 standard deviations for B (0). This is the first observation of mixing to be made using only semileptonic decays.
AB - The and B (0) mixing frequencies, Delta m (s) and Delta m (d) , are measured using a data sample corresponding to an integrated luminosity of 1.0 fb(-1) collected by the LHCb experiment in pp collisions at a centre of mass energy of 7 TeV during 2011. Around 1.8x10(6) candidate events are selected of the type (+ anything), where about half are from peaking and combinatorial backgrounds. To determine the B decay times, a correction is required for the momentum carried by missing particles, which is performed using a simulation-based statistical method. Associated production of muons or mesons allows us to tag the initial-state flavour and so to resolve oscillations due to mixing. We obtain <The hypothesis of no oscillations is rejected by the equivalent of 5.8 standard deviations for and 13.0 standard deviations for B (0). This is the first observation of mixing to be made using only semileptonic decays.
U2 - 10.1140/epjc/s10052-013-2655-8
DO - 10.1140/epjc/s10052-013-2655-8
M3 - Article
SN - 1434-6044
VL - 73
JO - European Physical Journal C
JF - European Physical Journal C
IS - 12
M1 - 2655
ER -