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Study of the D 0 p amplitude in Λb0 → D 0 decays

  • Author(s): Aaij, R;
  • Adeva, B;
  • Adinolfi, M;
  • Ajaltouni, Z;
  • Akar, S;
  • Albrecht, J;
  • Alessio, F;
  • Alexander, M;
  • Ali, S;
  • Alkhazov, G;
  • Cartelle, PA;
  • Alves, AA;
  • Amato, S;
  • Amerio, S;
  • Amhis, Y;
  • An, L;
  • Anderlini, L;
  • Andreassi, G;
  • Andreotti, M;
  • Andrews, JE;
  • Appleby, RB;
  • Archilli, F;
  • d’Argent, P;
  • Romeu, JA;
  • Artamonov, A;
  • Artuso, M;
  • Aslanides, E;
  • Auriemma, G;
  • Baalouch, M;
  • Babuschkin, I;
  • Bachmann, S;
  • Back, JJ;
  • Badalov, A;
  • Baesso, C;
  • Baker, S;
  • Balagura, V;
  • Baldini, W;
  • Barlow, RJ;
  • Barschel, C;
  • Barsuk, S;
  • Barter, W;
  • Baryshnikov, F;
  • Baszczyk, M;
  • Batozskaya, V;
  • Batsukh, B;
  • Battista, V;
  • Bay, A;
  • Beaucourt, L;
  • Beddow, J;
  • Bedeschi, F;
  • Bediaga, I;
  • Beiter, A;
  • Bel, LJ;
  • Bellee, V;
  • Belloli, N;
  • Belous, K;
  • Belyaev, I;
  • Ben-Haim, E;
  • Bencivenni, G;
  • Benson, S;
  • Berezhnoy, A;
  • Bernet, R;
  • Bertolin, A;
  • Betancourt, C;
  • Betti, F;
  • Bettler, MO;
  • van Beuzekom, M;
  • Bezshyiko, I;
  • Bifani, S;
  • Billoir, P;
  • Bird, T;
  • Birnkraut, A;
  • Bitadze, A;
  • Bizzeti, A;
  • Blake, T;
  • Blanc, F;
  • Blouw, J;
  • Blusk, S;
  • Bocci, V;
  • Boettcher, T;
  • Bondar, A;
  • Bondar, N;
  • Bonivento, W;
  • Bordyuzhin, I;
  • Borgheresi, A;
  • Borghi, S;
  • Borisyak, M;
  • Borsato, M;
  • Bossu, F;
  • Boubdir, M;
  • Bowcock, TJV;
  • Bowen, E;
  • Bozzi, C;
  • Braun, S;
  • Britsch, M;
  • Britton, T;
  • Brodzicka, J;
  • Buchanan, E;
  • Burr, C
  • et al.

Published Web Location

http://doi.org/10.1007/JHEP05(2017)030
No data is associated with this publication.
Abstract

An amplitude analysis of the decay Λb0 → D0pπ− is performed in the part of the phase space containing resonances in the D0p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb−1 of pp collisions recorded by the LHCb experiment. The spectrum of excited Λc+ states that decay into D0p is studied. The masses, widths and quantum numbers of the Λc(2880)+ and Λc(2940)+ resonances are measured. The constraints on the spin and parity for the Λc(2940)+ state are obtained for the first time. A near-threshold enhancement in the D0p amplitude is investigated and found to be consistent with a new resonance, denoted the Λc(2860)+, of spin 3/2 and positive parity.

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