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Title: Observation of the baryonic B decay B{sup 0}{yields}{Lambda}{sub c}{sup +}{Lambda}K{sup -}

Abstract

We report the observation of the baryonic B decay B{sup 0}{yields}{Lambda}{sub c}{sup +}{Lambda}K{sup -} with a significance larger than 7 standard deviations based on 471x10{sup 6} BB pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay B{sup 0}{yields}{Lambda}{sub c}{sup +}{Lambda}K{sup -} to be (3.8{+-}0.8{sub stat}{+-}0.2{sub sys}{+-}1.0{sub {Lambda}}{sub c}{sup +})x10{sup -5}. The uncertainties are statistical, systematic, and due to the uncertainty in the {Lambda}{sub c}{sup +} branching fraction. We find that the {Lambda}{sub c}{sup +}K{sup -} invariant-mass distribution shows an enhancement above 3.5 GeV/c{sup 2}.

Authors:
; ;  [1]; ;  [2]; ; ;  [3];  [4];  [3]; ; ;  [5]; ; ; ;  [6]; ;  [7]; more »;  [8] « less
  1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
  2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
  3. INFN Sezione di Bari, I-70126 Bari (Italy)
  4. (Italy)
  5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
  6. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
  7. Ruhr Universitaet Bochum, Institut fuer Experimentalphysik 1, D-44780 Bochum (Germany)
  8. University of British Columbia, Vancouver, British Columbia, V6T 1Z1 (Canada)
Publication Date:
OSTI Identifier:
21607728
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 84; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.84.071102; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B NEUTRAL MESONS; BARYONS; BRANCHING RATIO; GEV RANGE; KAONS MINUS; LAMBDA BARYONS; MASS DISTRIBUTION; PARTICLE DECAY; PEP STORAGE RINGS; STANFORD LINEAR ACCELERATOR CENTER; STORAGE RINGS; B MESONS; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; DECAY; DIMENSIONLESS NUMBERS; DISTRIBUTION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; HADRONS; HYPERONS; KAONS; MESONS; NATIONAL ORGANIZATIONS; PSEUDOSCALAR MESONS; SPATIAL DISTRIBUTION; STRANGE MESONS; STRANGE PARTICLES; US DOE; US ERDA; US ORGANIZATIONS

Citation Formats

Lees, J. P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M., Dipartimento di Fisica, Universita di Bari, I-70126 Bari, Milanes, D. A., Eigen, G., Stugu, B., Sun, L., Brown, D. N., Kerth, L. T., Kolomensky, Yu. G., Lynch, G., Koch, H., Schroeder, T., Asgeirsson, D. J., and Hearty, C. Observation of the baryonic B decay B{sup 0}{yields}{Lambda}{sub c}{sup +}{Lambda}K{sup -}. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.84.071102.
Lees, J. P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M., Dipartimento di Fisica, Universita di Bari, I-70126 Bari, Milanes, D. A., Eigen, G., Stugu, B., Sun, L., Brown, D. N., Kerth, L. T., Kolomensky, Yu. G., Lynch, G., Koch, H., Schroeder, T., Asgeirsson, D. J., & Hearty, C. Observation of the baryonic B decay B{sup 0}{yields}{Lambda}{sub c}{sup +}{Lambda}K{sup -}. United States. doi:10.1103/PHYSREVD.84.071102.
Lees, J. P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M., Dipartimento di Fisica, Universita di Bari, I-70126 Bari, Milanes, D. A., Eigen, G., Stugu, B., Sun, L., Brown, D. N., Kerth, L. T., Kolomensky, Yu. G., Lynch, G., Koch, H., Schroeder, T., Asgeirsson, D. J., and Hearty, C. Sat . "Observation of the baryonic B decay B{sup 0}{yields}{Lambda}{sub c}{sup +}{Lambda}K{sup -}". United States. doi:10.1103/PHYSREVD.84.071102.
@article{osti_21607728,
title = {Observation of the baryonic B decay B{sup 0}{yields}{Lambda}{sub c}{sup +}{Lambda}K{sup -}},
author = {Lees, J. P. and Poireau, V. and Tisserand, V. and Garra Tico, J. and Grauges, E. and Martinelli, M. and Palano, A. and Pappagallo, M. and Dipartimento di Fisica, Universita di Bari, I-70126 Bari and Milanes, D. A. and Eigen, G. and Stugu, B. and Sun, L. and Brown, D. N. and Kerth, L. T. and Kolomensky, Yu. G. and Lynch, G. and Koch, H. and Schroeder, T. and Asgeirsson, D. J. and Hearty, C.},
abstractNote = {We report the observation of the baryonic B decay B{sup 0}{yields}{Lambda}{sub c}{sup +}{Lambda}K{sup -} with a significance larger than 7 standard deviations based on 471x10{sup 6} BB pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay B{sup 0}{yields}{Lambda}{sub c}{sup +}{Lambda}K{sup -} to be (3.8{+-}0.8{sub stat}{+-}0.2{sub sys}{+-}1.0{sub {Lambda}}{sub c}{sup +})x10{sup -5}. The uncertainties are statistical, systematic, and due to the uncertainty in the {Lambda}{sub c}{sup +} branching fraction. We find that the {Lambda}{sub c}{sup +}K{sup -} invariant-mass distribution shows an enhancement above 3.5 GeV/c{sup 2}.},
doi = {10.1103/PHYSREVD.84.071102},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 84,
place = {United States},
year = {2011},
month = {10}
}