Inclusive production of neutral vector mesons in hadronic Z decays |
| |
| Authors: | ALEPH Collaboration D Buskulic D Casper I De Bonis D Decamp P Ghez C Goy J -P Lees " target="_blank">A Lucotte and M -N Minard |
| |
| Institution: | ALEPH Collaboration, D. Buskulic, D. Casper, I. De Bonis, D. Decamp, P. Ghez, C. Goy, J. -P. Lees, A. Lucotte and M. -N. Minard, et al. |
| |
| Abstract: | A data sample of about 3.0 million hadronicZ decays collected by the ALEPH experiment at LEP in the years 1991 through 1994 is used to make an inclusive selection of
B hadron events. In this event sample 4227±140±252B* mesons in the decayB*→Bγ and 1944±108±161B**
u,d
mesons decaying into a B meson and a charged pion are reconstructed. Here and in the followingB**
u,d
denotes the eightL=1(bū) and (bd) states and their charge conjugate.
For the well establishedB* meson the following quantities are obtained:ΔM=M
B*−MB=(45.30±0.35±0.87) MeV/c2 andN
B*/(N
B+N
B*)=(77.1±2.6±7.0)%. The angular distribution of the photons in theB* rest frame is used to measure the relative contribution of longitudinalB* polarization states to beσ
L/(σ
L+σ
T)=(33±6±5)%. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
