Evidence for the Rare Decay B{sup +}{yields}D{sub s}{sup +}{pi}{sup 0}

Journal Article · Fri Apr 27 04:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.171801· OSTI ID:20951267

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A ^[1]; Grauges, E ^[2]; Palano, A ^[3]; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S ^[4]; Eigen, G; Ofte, I; Stugu, B ^[5]; Abrams, G S ^[6]

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1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
2. Facultat de Fisica, Departament ECM, Universitat de Barcelona, E-08028 Barcelona (Spain)
3. Dipartimento di Fisica and INFN, Universita di Bari, I-70126 Bari (Italy)
4. Institute of High Energy Physics, Beijing 100039 (China)
5. Institute of Physics, University of Bergen, N-5007 Bergen (Norway)
6. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We have searched for the rare decay B{sup +}{yields}D{sub s}{sup +}{pi}{sup 0}. The analysis is based on a sample of 232x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector at the SLAC PEP-II e{sup +}e{sup -} storage ring. We find 19.6 signal events, corresponding to a significance of 4.7{sigma}. The extracted signal yield including statistical and systematic uncertainties is 20.1{sub -6.0-1.5}{sup +6.8+0.4}, and we measure B(B{sup +}{yields}D{sub s}{sup +}{pi}{sup 0})=(1.5{sub -0.4}{sup +0.5}{+-}0.1{+-}0.2)x10{sup -5}, where the first uncertainty is statistical, the second is systematic, and the last is due to the uncertainty on the D{sub s}{sup +} decay and its daughter decay branching fractions.

• OSTI ID: 20951267
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 98; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B PLUS MESONS
BRANCHING RATIO
D PLUS MESONS
PARTICLE DECAY
PARTICLE PRODUCTION
PIONS NEUTRAL
SIGNALS
STANFORD LINEAR ACCELERATOR CENTER
STORAGE RINGS