A Study of Exclusive Nonleptonic Decays of Mesons into Final States of Strange Mesons and 1S or 2S Charmonia
1998160 pages
Supervisor:
Thesis: PhD - Pekka Sinervo()
- Toronto U.
e-Print:
- hep-ex/0108046 [hep-ex]
DOI:
Report number:
- FERMILAB-THESIS-1998-32,
- UMI-NQ-33920,
- PRINT-98-027
Experiments:
Citations per year
Abstract: (arXiv)
[abridged] Bound states of heavy quarks can serve as a laboratory for inquiry into the behaviour of the fundamental strong and electroweak interactions. This thesis examines observations of B0, B0bar, and B+- mesons produced in proton-antiproton collisions at centre-of-mass energies of sqrt{s}=1.8 TeV. The B-meson decay products are recorded using the Collider Detector at Fermilab (CDF) located on the Tevatron collider at Fermilab, USA. Four B-meson decays and their charge conjugates are studied: B+ -> J/psi K+, B0 -> J/psi K*(892)0, B+ -> psi(2S) K+, and B0 -> psi(2S) K*(892)0. Using a data sample corresponding to a time-integrated luminosity of (109 +- 7)/pb, statistically significant signals are observed in all the channels. Topological similarities between the B decays are exploited to measure the six relative branching fractions (Br) of each channel with respect to the other channels. The ratios involving the B+ -> J/psi K+ mode are Br(B0 -> J/psi K*(892)0) / Br(B+ -> J/psi K+) = 1.76 +- 0.14[stat] +- 0.15[syst], Br(B+ -> psi(2S) K+) / Br(B+ -> J/psi K+) = 0.558 +- 0.082[stat] +- 0.056[syst], and Br(B0 -> psi(2S) K*(892)0) / Br(B+ -> J/psi K+) = 0.908 +- 0.194[stat] +- 0.100[syst]. The indicated uncertainties are statistical and systematic, respectively. In ratios involving unlike B-meson species, equal production rates for B+ and B0 mesons have been assumed. The B+ -> psi(2S) K+ and B0 -> psi(2S) K*(892)0 reconstructions are the first observations of these processes at a hadron collider. The branching-fraction ratio measurements are consistent with phenomenological predictions that employ the factorization Ansatz, and the derived absolute branching-fraction measurements are consistent with previous world-average limits and values from e+e- colliders. [abridged]Note:
- Results published in hep-ex/9803013
- thesis
- anti-p p: colliding beams
- anti-p p: inclusive reaction
- bottom: pair production
- B: hadronic decay
- B0: branching ratio
- B+: branching ratio
- J/psi(3100)
- psi(3685)
- K*(892)
References(162)
Figures(0)