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Measurements of the branching fractions of Λ c+ → pπ π +, Λ c+ → pKK+, and Λ c+ → pπ K+

  • Author(s): Aaij, R;
  • Adeva, B;
  • Adinolfi, M;
  • Ajaltouni, Z;
  • Akar, S;
  • Albrecht, J;
  • Alessio, F;
  • Alexander, M;
  • Alfonso Albero, A;
  • Ali, S;
  • Alkhazov, G;
  • Alvarez Cartelle, P;
  • 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;
  • Arnau Romeu, J;
  • 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;
  • Baranov, A;
  • Barlow, RJ;
  • Barschel, C;
  • Barsuk, S;
  • Barter, W;
  • Baryshnikov, F;
  • Batozskaya, V;
  • Battista, V;
  • Bay, A;
  • Beaucourt, L;
  • Beddow, J;
  • Bedeschi, F;
  • Bediaga, I;
  • Beiter, A;
  • Bel, LJ;
  • Beliy, N;
  • Bellee, V;
  • Belloli, N;
  • Belous, K;
  • Belyaev, I;
  • Ben-Haim, E;
  • Bencivenni, G;
  • Benson, S;
  • Beranek, S;
  • Berezhnoy, A;
  • Bernet, R;
  • Berninghoff, D;
  • Bertholet, E;
  • Bertolin, A;
  • Betancourt, C;
  • Betti, F;
  • Bettler, MO;
  • van Beuzekom, M;
  • Bezshyiko, I;
  • Bifani, S;
  • Billoir, P;
  • Birnkraut, A;
  • Bitadze, A;
  • Bizzeti, A;
  • Bjørn, M;
  • 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;
  • Britton, T;
  • Brodzicka, J
  • et al.

Published Web Location

http://doi.org/10.1007/JHEP03(2018)043
No data is associated with this publication.
Abstract

The ratios of the branching fractions of the decays Λc+ → pπ−π+, Λc+ → pK−K+, and Λc+ → pπ−K+ with respect to the Cabibbo-favoured Λc+ → pK−π+ decay are measured using proton-proton collision data collected with the LHCb experiment at a 7 TeV centre-of-mass energy and corresponding to an integrated luminosity of 1.0 fb−1:ℬ(Λc+→p+)ℬ(Λc+→pK−π+)=(7.44±0.08±0.18)%,ℬ(Λc+→pK−K+)ℬ(Λc+→pK−π+)=(1.70±0.03±0.03)%ℬ(Λc+→pπ−K+)ℬ(Λc+→pK−π+)=(0.165±0.015±0.005)%,where the uncertainties are statistical and systematic, respectively. These results are the most precise measurements of these quantities to date. When multiplied by the world-average value for ℬ(Λc+→pK−π+), the corresponding branching fractions areℬ(Λc+→p+)=(4.72±0.05±0.11±0.25)×10−3,ℬ(Λc+→pK−K+)=(1.08±0.02±0.02±0.06)×10−3,ℬ(Λc+→pπ−K+)=(1.04±0.09±0.03±0.05)×10−4,where the final uncertainty is due to ℬ(Λc+→pK−π+).[Figure not available: see fulltext.].

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