Author/Authors :
Koya Abe، نويسنده , , Kenji Abe، نويسنده , , T. Abe، نويسنده , , I. Adam، نويسنده , , H. Akimoto، نويسنده , , John A. D. Aston، نويسنده , , K.G. Baird، نويسنده , , C. Baltay، نويسنده , , H.R. Band، نويسنده , , T.L. Barklow، نويسنده , , J.M. Bauer، نويسنده , , G. Bellodi، نويسنده , , R. Berger، نويسنده , , G. Blaylock، نويسنده , , J.R. Bogart، نويسنده , , G.R. Bower، نويسنده , , J.E. Brau، نويسنده , , W. K. Panofsky and M. Breidenbach، نويسنده , , W.M. Bugg، نويسنده , , D. Burke، نويسنده , , et al.، نويسنده ,
Abstract :
We have measured gluon splitting into bottom quarks, g→bb̄, 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 of any primary flavor. 4-jet events were identified, and in each event a topological vertex-mass technique was applied to the two jets closest in angle in order to identify them as b or b̄ jets. The upgraded CCD-based vertex detector gives very high B-tagging efficiency, especially for B hadrons with the low energies typical of this process. We measured the rate of g→bb̄ production per hadronic event, gbb̄, to be (2.44±0.59(stat.)±0.34(syst.))×10−3.
