Flavor-specific inclusive B decays to charm
Physical Review Letters 80:6 (1998) 1150-1155
Abstract:
We have measured the branching fractions for B → D®X, B → D®X, and B → D®Xℓ+v. From these results and some previously measured branching fractions, we obtain B(b → cc®s) = (21.9 ± 3.7)%, B(b → sg) < 6.8% at 90% C.L., and B(D0 → K− π+ = (3.69 ± 0.20)%. Implications for the “B semileptonic decay problem” (measured branching fraction being below theoretical expectations) are discussed. With the increase in the value of B(b → cc®s) due to B → DX, the discrepancy is no longer statistically compelling. © 1998 American Physical Society.Further search for the two-photon production of the glueball candidate fJ (2220)
Physical Review Letters 81:16 (1998) 3328-3332
Abstract:
The CLEO II detector at the e+e− storage ring CESR has been used to search for two-photon production of the fJ(2220) decaying into π+π−. No evidence for a signal is found in 4.77fb−1 of data and a 95% C.L. upper limit on [τγγBπ+π−]fJ(2220) of 2.5 eV is set. If this result is combined with the BES Collaboration's measurement of fJ(2220)→π+π− in radiative J/Ψ decay and the recent CLEO result for [τγγBK0SK0S]fJ(2220), a 95% C.L. lower limit on the stickiness of 102 is obtained. This result for the stickiness provides further support for a substantial neutral parton content in the fJ(2220). © 1998 The American Physical Society.Investigation of semileptonic b meson decays to p-wave charm mesons
Physical Review Letters 80:19 (1998) 4127-4131
Abstract:
We have studied semileptonic B meson decays with a p-wave charm meson in the final state using 3.29×106BB¯ events collected with the CLEO II detector at the Cornell Electron-Positron Storage Ring.We find a value for the exclusive semileptonic product branching fraction B(B−→D10ℓ−ν¯ℓ)B(D10→D*+π−) = (0.373±0.085±0.052±0.024)% and an upper limit for B(B−→D2*0ℓ-ν¯ℓ)B(D2*0→D*+π−)<0.16% (90% C.L.).Furthermore, we present the first measurement of the q2 spectrum for B−→D10ℓ−ν¯ℓ. © 1998 The American Physical Society.Measurement of the branching ratios for the decays of Ds + to ηπ+, η′π+, ηρ+, and η′ρ+
Physical Review D 58:5 (1998)
Abstract:
Using a data sample with an integrated luminosity of 3.9 fb-1 collected in e+e- annihilation with the CLEO-II detector at the Cornell Electron Storage Ring, we have measured the branching ratios for the decay modes Ds+→(η,η′)π+ and Ds+→(η,η′)ρ+ relative to Ds+→φ+. These decay modes are among the most common hadronic decays of the Ds+ , and can be related by factorization to the semileptonic decays Ds+ →(η,η′)ℓ+νl. The results obtained are compared with previous CLEO results and with the branching ratios measured for the related semileptonic decays. We also report results on the Cabibbo-suppressed decays of the D+ to the same final states. © 1998 The American Physical Society.Measurement of the branching fractions of Λc+→pK¯n(π)
Physical Review D - Particles, Fields, Gravitation and Cosmology 57:7 (1998) 4467-4470