Evidence for the exclusive decay and measurement of the mass of the meson
Collaboration
7 pages
Published in:
- Phys.Rev.Lett. 96 (2006) 082002
e-Print:
- hep-ex/0505076 [hep-ex]
PDG: MASS
Report number:
- FERMILAB-PUB-05-216-E
Experiments:
Citations per year
Abstract:
We report first evidence for a fully reconstructed decay mode of the B_c^{\pm} meson in the channel B_c^{\pm} \to J/psi \pi^{\pm}, with J/psi \to mu^+mu^-. The analysis is based on an integrated luminosity of 360 pb$^{-1} in p\bar{p} collisions at 1.96 TeV center of mass energy collected by the Collider Detector at Fermilab. We observe 14.6 \pm 4.6 signal events with a background of 7.1 \pm 0.9 events, and a fit to the J/psi pi^{\pm} mass spectrum yields a B_c^{\pm} mass of 6285.7 \pm 5.3(stat) \pm 1.2(syst) MeV/c^2. The probability of a peak of this magnitude occurring by random fluctuation in the search region is estimated as 0.012%.Note:
- 7 pages, 3 figures. Version 3, accepted by PRL
- 14.40.Lb
- 14.40.Nd
- 13.25.Hw
- anti-p p: colliding beams
- anti-p p: inclusive reaction
- quark: charm
- quark: pair production
- B/c: hadronic decay
- J/psi(3100): leptonic decay
- mass spectrum: (J/psi(3100) pi)
References(29)
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