TY - JOUR
T1 - Dalitz plot analysis of B0 → D ¯ 0
π+
π- decays
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 - D'Argent, P.
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 - 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 - 2015/8/7
Y1 - 2015/8/7
N2 - The resonant substructures of B0→D¯0π+π- decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb-1 of pp collisions collected by the LHCb detector is used. The branching fraction of the B0→D¯0π+π- decay in the region m(D¯0π±)>2.1 GeV/c2 is measured to be (8.46±0.14±0.29±0.40)×10-4, where the first uncertainty is statistical, the second is systematic and the last arises from the normalization channel B0→D∗(2010)-π+. The π+π- S-wave components are modeled with the isobar and K-matrix formalisms. Results of the Dalitz plot analyses using both models are presented. A resonant structure at m(D¯0π-)≈2.8 GeV/c2 is confirmed and its spin-parity is determined for the first time as JP=3-. The branching fraction, mass and width of this structure are determined together with those of the D0∗(2400)- and D2∗(2460)- resonances. The branching fractions of other B0→D¯0h0 decay components with h0→π+π- are also reported. Many of these branching fraction measurements are the most precise to date. The first observation of the decays B0→D¯0f0(500), B0→D¯0f0(980), B0→D¯0ρ(1450), B0→D3∗(2760)-π+ and the first evidence of B0→D¯0f0(2020) are presented.
AB - The resonant substructures of B0→D¯0π+π- decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb-1 of pp collisions collected by the LHCb detector is used. The branching fraction of the B0→D¯0π+π- decay in the region m(D¯0π±)>2.1 GeV/c2 is measured to be (8.46±0.14±0.29±0.40)×10-4, where the first uncertainty is statistical, the second is systematic and the last arises from the normalization channel B0→D∗(2010)-π+. The π+π- S-wave components are modeled with the isobar and K-matrix formalisms. Results of the Dalitz plot analyses using both models are presented. A resonant structure at m(D¯0π-)≈2.8 GeV/c2 is confirmed and its spin-parity is determined for the first time as JP=3-. The branching fraction, mass and width of this structure are determined together with those of the D0∗(2400)- and D2∗(2460)- resonances. The branching fractions of other B0→D¯0h0 decay components with h0→π+π- are also reported. Many of these branching fraction measurements are the most precise to date. The first observation of the decays B0→D¯0f0(500), B0→D¯0f0(980), B0→D¯0ρ(1450), B0→D3∗(2760)-π+ and the first evidence of B0→D¯0f0(2020) are presented.
UR - http://www.scopus.com/inward/record.url?scp=84940546485&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.92.032002
DO - 10.1103/PhysRevD.92.032002
M3 - Article
AN - SCOPUS:84940546485
SN - 1550-7998
VL - 92
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 3
M1 - 032002
ER -