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Title: Measurement of Inclusive b Semileptonic Branching Fractions at the Z Resonance

Abstract

This document presents a new measurement of inclusive b semileptonic branching fractions B(b-->l) and B(b-->c-->l). The b-->l and b-->c-->l are separated by a means that uses correlation between the final state lepton charge and that of its parent b quark as a constraint. Monte Carlo counts of electrons and muons are calibrated to the data using a newly developed technique based on pairs of mutually independent tests for each particle hypothesis separately. The data sample consists of about 550,000 hadronic Z decays collected at the SLD between 1993 and 1998. Upon analysis of electron and muon counts in 61602 hadronic event hemispheres tagged as containing either a b or a b-bar, the author reports: B(b-->e) = 0.0949{+-}0.0049{+-}0.0050, B(b-->mu) = 0.1066{+-}0.0038{+-}0.0049, combined B(b-->l) = 0.1015{+-}0.0030{+-}0.0035; and B(b-->c-->e) = 0.0811{+-}0.0053{+-}0.0030, B(-->b-->c-->mu) = 0.0717{+-}0.0045{+-}0.0024, combined B(b-->c-->l) = 0.0756{+-}0.0034{+-}0.0019.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
763780
Report Number(s):
SLAC-R-558
TRN: US0004816
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 23 May 2000
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; SEMILEPTONIC DECAY; BRANCHING RATIO; Z*BARYONS; B QUARKS; HADRONIC PARTICLE DECAY; STANFORD LINEAR COLLIDER DETECTOR; ELECTRONS; MUONS; EXPERIMENTAL DATA

Citation Formats

Trandafir, Aurel. Measurement of Inclusive b Semileptonic Branching Fractions at the Z Resonance. United States: N. p., 2000. Web. doi:10.2172/763780.
Trandafir, Aurel. Measurement of Inclusive b Semileptonic Branching Fractions at the Z Resonance. United States. doi:10.2172/763780.
Trandafir, Aurel. Tue . "Measurement of Inclusive b Semileptonic Branching Fractions at the Z Resonance". United States. doi:10.2172/763780. https://www.osti.gov/servlets/purl/763780.
@article{osti_763780,
title = {Measurement of Inclusive b Semileptonic Branching Fractions at the Z Resonance},
author = {Trandafir, Aurel},
abstractNote = {This document presents a new measurement of inclusive b semileptonic branching fractions B(b-->l) and B(b-->c-->l). The b-->l and b-->c-->l are separated by a means that uses correlation between the final state lepton charge and that of its parent b quark as a constraint. Monte Carlo counts of electrons and muons are calibrated to the data using a newly developed technique based on pairs of mutually independent tests for each particle hypothesis separately. The data sample consists of about 550,000 hadronic Z decays collected at the SLD between 1993 and 1998. Upon analysis of electron and muon counts in 61602 hadronic event hemispheres tagged as containing either a b or a b-bar, the author reports: B(b-->e) = 0.0949{+-}0.0049{+-}0.0050, B(b-->mu) = 0.1066{+-}0.0038{+-}0.0049, combined B(b-->l) = 0.1015{+-}0.0030{+-}0.0035; and B(b-->c-->e) = 0.0811{+-}0.0053{+-}0.0030, B(-->b-->c-->mu) = 0.0717{+-}0.0045{+-}0.0024, combined B(b-->c-->l) = 0.0756{+-}0.0034{+-}0.0019.},
doi = {10.2172/763780},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}

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