Evidence for the Exclusive Decay B{sub c}{sup {+-}}{yields}J/{psi}{pi}{sup {+-}} and Measurement of the Mass of the B{sub c}{sup {+-}} Meson

Journal Article · Fri Mar 03 04:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.082002· OSTI ID:20777062

Abulencia, A; Budd, S; Chu, P H; Ciobanu, C I; Errede, D; Errede, S; Gerberich, H; Grundler, U; Junk, T R; Kraus, J; Liss, T M; Marino, C; Pitts, K; Rogers, E; Taffard, A; Veramendi, G; Vickey, T; Zhang, X ^[1]; Acosta, D; Cruz, A ^[2]

---

1. University of Illinois, Urbana, Illinois 61801 (United States)
2. University of Florida, Gainesville, Florida 32611 (United States)

We report the first evidence for a fully reconstructed decay mode of the B{sub c}{sup {+-}} meson in the channel B{sub c}{sup {+-}}{yields}J/{psi}{pi}{sup {+-}}, with J/{psi}{yields}{mu}{sup +}{mu}{sup -}. The analysis is based on an integrated luminosity of 360 pb{sup -1} in pp collisions at 1.96 TeV center of mass energy collected by the Collider Detector at Fermilab. We observe 14.6{+-}4.6 signal events with a background of 7.1{+-}0.9 events, and a fit to the J/{psi}{pi}{sup {+-}} mass spectrum yields a B{sub c}{sup {+-}} mass of 6285.7{+-}5.3(stat){+-}1.2(syst) MeV/c{sup 2}. The probability of a peak of this magnitude occurring by random fluctuation in the search region is estimated as 0.012%.

• OSTI ID: 20777062
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 96; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MINUS MESONS
B PLUS MESONS
CENTER-OF-MASS SYSTEM
FERMILAB COLLIDER DETECTOR
FLUCTUATIONS
HADRONIC PARTICLE DECAY
J PSI-3097 MESONS
MASS
MASS SPECTRA
MUONS MINUS
MUONS PLUS
PAIR PRODUCTION
PIONS MINUS
PROBABILITY
PROTON-PROTON INTERACTIONS
RANDOMNESS
SCORPIONS
SIGNALS
TEV RANGE 01-10