Study of B0→D* -π+π-π+ and B0→D*-K+π-π+ decays

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, Y. Amhis, L. Anderlini, J. Anderson, R. AndreassenR. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, S. Bachmann, J. J. Back, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, Th Bauer, A. Bay, J. Beddow, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, M. Benayoun, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, C. Blanks, J. Blouw, S. Blusk, A. Bobrov, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, N. H. Brook, H. Brown, I. Burducea, A. Bursche, J. Buytaert, S. Cadeddu, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana, A. Carbone, G. Carboni, R. Cardinale, A. Cardini, H. Carranza-Mejia, L. Carson, K. Carvalho Akiba, G. Casse, M. Cattaneo

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Abstract

Using proton-proton collision data collected by the LHCb experiment at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb -1, the ratio of branching fractions of the B0→D* -π +π -π + decay relative to the B0→D* -π + decay is measured to be B(B0→D* -π +π -π +) B(B0→D* -π +)=2.64±0.04(stat)±0. 13(syst). The Cabibbo-suppressed decay B0→D* -K +π -π + is observed for the first time, and the measured ratio of branching fractions is B(B0→D* -K +π -π +)B(B0→D* -π +π -π +)=(6.47±0. 37(stat)±0.35(syst))×10 -2. A search for orbital excitations of charm mesons contributing to the B0→D* -π +π -π + final state is also performed, and the first observation of the B0→D ̄1 (2420)+π - decay is reported with the ratio of branching fractions B(B0→(D ̄1 (2420)0→D* -π +) π -π +)B(B0→D* -π +π -π +)=(2.04±0.42(stat)±0. 22(syst))×10 -2, where the numerator represents a product of the branching fractions B(B0→D ̄1 (2420)-π +) and B(D ̄1 (2420)0→D* -π +).

Original languageEnglish
Article number092001
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume87
Issue number9
DOIs
Publication statusPublished - 3 May 2013
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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