TY - JOUR
T1 - Study of the rare Bs0 and B0 decays into the π+π-μ+μ- final state
AU - LHCb Collaboration
AU - Aaij, R.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Affolder, A.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Ali, S.
AU - Alkhazov, G.
AU - Alvarez Cartelle, P.
AU - Alves, A. A.
AU - Amato, S.
AU - Amerio, S.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Anderson, J.
AU - Andreassen, R.
AU - Andreotti, M.
AU - Andrews, J. E.
AU - Appleby, R. B.
AU - Aquines Gutierrez, O.
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 - Baesso, C.
AU - Baldini, W.
AU - Barlow, R. J.
AU - Barschel, C.
AU - Barsuk, S.
AU - Bifani, S.
AU - Farley, N.
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 - 2015/4/9
Y1 - 2015/4/9
N2 - A search for the rare decays Bs0→π+π-μ+μ- and B0→π+π-μ+μ- is performed in a data set corresponding to an integrated luminosity of 3.0 fb-1 collected by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. Decay candidates with pion pairs that have invariant mass in the range 0.5-1.3 GeV/c2 and with muon pairs that do not originate from a resonance are considered. The first observation of the decay Bs0→π+π-μ+μ- and the first evidence of the decay B0→π+π-μ+μ- are obtained and the branching fractions, restricted to the dipion-mass range considered, are measured to be B(Bs0→π+π-μ+μ-)=(8.6±1.5(stat)±0.7(syst)±0.7(norm))×10-8 and B(B0→π+π-μ+μ-)=(2.11±0.51(stat)±0.15(syst)±0.16(norm))×10-8, where the third uncertainty is due to the branching fraction of the decay B0→J/ψ(→μ+μ-)K*(892)0(→K+π-), used as a normalisation.
AB - A search for the rare decays Bs0→π+π-μ+μ- and B0→π+π-μ+μ- is performed in a data set corresponding to an integrated luminosity of 3.0 fb-1 collected by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. Decay candidates with pion pairs that have invariant mass in the range 0.5-1.3 GeV/c2 and with muon pairs that do not originate from a resonance are considered. The first observation of the decay Bs0→π+π-μ+μ- and the first evidence of the decay B0→π+π-μ+μ- are obtained and the branching fractions, restricted to the dipion-mass range considered, are measured to be B(Bs0→π+π-μ+μ-)=(8.6±1.5(stat)±0.7(syst)±0.7(norm))×10-8 and B(B0→π+π-μ+μ-)=(2.11±0.51(stat)±0.15(syst)±0.16(norm))×10-8, where the third uncertainty is due to the branching fraction of the decay B0→J/ψ(→μ+μ-)K*(892)0(→K+π-), used as a normalisation.
UR - http://www.scopus.com/inward/record.url?scp=84963820193&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2015.02.010
DO - 10.1016/j.physletb.2015.02.010
M3 - Article
AN - SCOPUS:84963820193
SN - 0370-2693
VL - 743
SP - 46
EP - 55
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -