This article reports world averages for measurements on b-hadron properties obtained by the Heavy Flavor Averaging Group (HFAG) using the available results as of summer 2004 conferences. In the averaging, the input parameters used in the various analyses are adjusted (rescaled) to common values, and all known correlations are taken into account. The… (More)
We report the first observation of the decay B + → χ c0 K + using 21.3 fb −1 of data collected by the Belle detector at the Υ(4S) resonance. The preliminary result for the branching fraction is B(B + → χ c0 K +) = (8.0 +2.7 −2.4 ± 1.0 ± 1.1) × 10 −4 where the first error is statistical, the second is systematic, and the third comes from the uncertainty in… (More)
We report on a study of the invariant mass spectrum of the hadronic system in the decay τ − → π − π 0 ν τ. This study was performed with data obtained with the CLEO II detector operating at the CESR e + e − collider. We present fits to phenomenological models in which resonance parameters associated with the ρ(770) and ρ(1450) mesons are determined. The π −… (More)
We review recent experimental results on hadronic decays and lifetimes of hadrons containing b and c quarks. 1 We discuss charm counting and the semileptonic branching fraction in B decays, the color suppressed amplitude in B and D decay, and the search for gluonic penguins in B decay. 1 Charm counting and the semileptonic branching fraction 1.1 The… (More)
I review results related to the CKM angle φ 1 (β). These results include recent measurements of CP-violation from the BaBar and Belle experiments in b → c¯ cs, b → c¯ cd and b → sq ¯ q processes.
We have observed four new decay modes of the charmed baryon + c using data collected with the CLEO II detector. Three decay modes, + c ! p K 0 , + , and + , are rst observations of nal states with an meson, while the fourth mode, + c ! K 0 K + , requires an s s quark pair to be popped out of the vacuum. The branching ratios relative to + c ! pK ? + are… (More)
The Belle detector was designed and constructed to carry out quantitative studies of rare B-meson decay modes with very small branching fractions using an asymmetric e þ e À collider operating at the U(4S) resonance, the KEK-B-factory. Such studies require data samples containing B10 7 B-meson decays. The Belle detector is configured around a 1:5 T… (More)
We present a measurement of the standard model CP violation parameter sin2 phi(1) based on a 29.1 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. One neutral B meson is fully reconstructed as a J/psi K(S), psi(2S)K(S), chi(c1)K(S), eta(c)K(S), J/psi K(L), or J/psi K(*0) decay… (More)