G.D. Punkar

Search for charmless hadronic decays of B mesons with the SLAC SLD detector

Kenji Abe, Koya Abe, K. Abe, Ilke Adam et autres

Based on a sample of approximately 500 000 hadronic ${Z}^{0}$ decays accumulated between 1993 and 1998, the SLD experiment has set limits on 24 fully charged two-body and quasi-two-body exclusive charmless hadronic decays of ${B}^{+},$ ${B}^{0},$ and ${B}_{s}^{0}$ mesons. The precise tracking …

jp, us, it, gb, ru, ca (code pays fourni par la source)

Direct Measurement of Ab and Ac at the Z0 Pole Using a Lepton Tag

Kenji Abe, Koya Abe, K. Abe, Ilke Adam et autres

The parity violation parameters ${A}_{b}$ and ${A}_{c}$ of the $\mathrm{Zb}\overline{b}$ and $\mathrm{Zc}\overline{c}$ couplings have been measured directly, using the polar angle dependence of the ${Z}^{0}$-pole polarized cross sections. Bottom and charmed hadrons were tagged via semileptonic decays. Both the muon and electron …

jp, us, gb, it, ru (code pays fourni par la source)

Measurement of the probability for gluon splitting into b anti-b in Z0 decays

Kenji Abe, P. F. Jacques, H. Hwang, T. W. Reeves et autres

We present a preliminary measurement of the rate of gluon splitting into bottom quarks, g -> b bbar, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events …

Production of π+, K+, K0, K*0, φ, p and Λ0 in hadronic Z0 decays

K. Abe, T. Abe, Ilke Adam, T. Akagi et autres

We have measured the differential production cross sections as a function of scaled momentum ${x}_{p}{=2p/E}_{\mathrm{c}.\mathrm{m}.}$ of the identified hadron species ${\ensuremath{\pi}}^{+},$ ${K}^{+},$ ${K}^{0},$ ${K}^{*0},$ $\ensuremath{\varphi}, p$, ${\ensuremath{\Lambda}}^{0},$ and of the corresponding antihadron species in inclusive hadronic ${Z}^{0}$ decays, as well as separately …

jp, us, gb, it (code pays fourni par la source)

A Preliminary measurement of the gluon splitting rate into b anti-b pairs in hadronic Z0 decays

Toshinori Abe, P. F. Jacques, H. Hwang, T. W. Reeves et autres

Measurement of A(c) with charmed mesons at SLD

Kenji Abe, P. F. Jacques, H. Hwang, T. W. Reeves et autres

A preliminary study of the structure of b{anti b}g events using Z{sup 0} decays

K. Abe, P. F. Jacques, H. Hwang, Ronald James Cotton et autres

The structure of three-jet b{anti b}g events has been studied using hadronic Z{sup 0} decays recorded in the SLD experiment at SLAC. Three-jet final states were selected and the CCD-based vertex detector was used to identify two of the jets as a …

Preliminary measurements of production of pi+-, K+-, p, K0 and Lambda0 in hadronic Z0 decays

K. Abe, H. Hwang, Ronald James Cotton, R.K. Yamamoto et autres

A Study of rapidity gaps in e+ e- ---> Z0 events

K. Abe, S. H. Williams, H. Hwang, Ronald James Cotton et autres

An Improved limit on jet handedness in Z0 decays

K. Abe, S. H. Williams, H. Hwang, Ronald James Cotton et autres

Measurement of the average lifeetime of B hadrons at SLD

G.D. Punkar

The authors present preliminary measurements of the average B hadron lifetime using a sample of 50,000 Z{sup 0} events collected by SLD at the SLC in 1993. Their first technique uses the impact parameter of tracks in jets opposite tagged b jets. …

A preliminary, precise measurement of the average B hadron lifetime

K. Abe, Y. Hasegawa, A. Yu. Tolstykh, Jaroslav Va'vra et autres