Searches for rare or forbidden semileptonic charm decays

Journal Article · Sat Oct 01 04:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.072006· OSTI ID:21607746

Lees, J P; Poireau, V; Tisserand, V ^[1]; Garra Tico, J; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Milanes, D A ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G ^[5]; Koch, H; Schroeder, T ^[6]; Asgeirsson, D J; Hearty, C ^[7]

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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. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
6. Ruhr Universitaet Bochum, Institut fuer Experimentalphysik 1, D-44780 Bochum (Germany)
7. University of British Columbia, Vancouver, British Columbia, V6T 1Z1 (Canada)

We present searches for rare or forbidden charm decays of the form X{sub c}{sup +}{yields}h{sup {+-}}l{sup {+-}}l{sup (')+}, where X{sub c}{sup +} is a charm hadron (D{sup +}, D{sub s}{sup +}, or {Lambda}{sub c}{sup +}), h{sup {+-}} is a pion, kaon, or proton, and l{sup ('){+-}} is an electron or muon. The analysis is based on 384 fb{sup -1} of e{sup +}e{sup -} annihilation data collected at or close to the {Upsilon}(4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory. No significant signal is observed for any of the 35 decay modes that are investigated. We establish 90% confidence-level upper limits on the branching fractions between 1x10{sup -6} and 44x10{sup -6} depending on the channel. In most cases, these results represent either the first limits or significant improvements on existing limits for the decay modes studied.

• OSTI ID: 21607746
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 84; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BARYONS
BOSONS
BRANCHING RATIO
CHARM PARTICLES
CHARMED BARYONS
CHARMED MESONS
CYCLIC ACCELERATORS
D MESONS
D PLUS MESONS
D S MESONS
DECAY
DIMENSIONLESS NUMBERS
ELECTRONS
ELEMENTARY PARTICLES
FERMILAB ACCELERATOR
FERMIONS
HADRONS
INTERACTIONS
KAONS
LAMBDA C PLUS BARYONS
LEPTONS
MATTER
MESONS
MUONS
NATIONAL ORGANIZATIONS
NUCLEONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PIONS
POSITRONS
PROTONS
PSEUDOSCALAR MESONS
RESONANCE
SEMILEPTONIC DECAY
STANFORD LINEAR ACCELERATOR CENTER
STRANGE MESONS
STRANGE PARTICLES
SYNCHROTRONS
US DOE
US ERDA
US ORGANIZATIONS
WEAK PARTICLE DECAY