[SLAC] [SLAC Pubs and Reports]

SLAC-PUB-8157
Measurement of the Probability for Gluon Splitting into b anti-b in Z0 Decays

Abstract

We present a preliminary measurement of the rate of gluon splitting into bottom quarks, g ---> b anti-b, 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 a topological vertex-mass technique was applied to each jet in order to identify b or anti-b jets. The upgraded CCD based vertex detector gives very high B-tagging efficiency, especially for B hadrons of the low energies typical of this process. The two most nearly collinear b/anti-b jets were tagged as originating from g ---> b anti-b. We measured the rate of secondary b/anti-b production per hadronic event, gb anti-b, to be (3.07 ± 0.71(stat.) ± 0.66(syst.)) × 10-3 (preliminary).

Full Text

PDF

Compressed PostScript

Notes

The PDF version of this document was distilled from a PostScript file most likely created from LaTeX source which used Type 3 fonts. The resultant PDF may be unreadable on the screen at the default viewing magnification (fonts will appear bitmapped, jagged), though the type will be legible at higher magnifications.

Despite the cosmetic problems resulting from the use Type 3 fonts in the original source file, such PDF files print without problems; likewise, the onscreen text is searchable and selectable.

More Information

Full bibliographic data for this document, including its complete author list, is (or soon will be) available from SLAC's SPIRES-HEP Database.
Please report problems with this file to posting@slac.stanford.edu. The SLAC preprint inventory is provided by the SLAC Technical Publications Department.
Page generated 04 Apr 2001 @ 15:06 PDT by htmlme.pl