Prompt muon production in $e^+e^-$ annihilations at 29-GeV

Aihara, H.; Alston-Garnjost, M.; Badtke, D.H.; Bakken, J.A.; Barbaro-Galtieri, A.; Barnes, A.V.; Barnett, B.A.; Bengtsson, H.U.; Blumenfeld, Barry J.; Bross, A.D.

doi:10.1103/PhysRevD.31.2719

Prompt muon production in $e^+e^-$ annihilations at 29-GeV

TPC/Two Gamma

Collaboration

•

H. Aihara

Jan, 1985

20 pages

Published in:

Phys.Rev.D 31 (1985) 2719

DOI:

10.1103/PhysRevD.31.2719

Report number:

JHU-8501

Experiments:

SLAC-PEP-004

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Abstract: (APS)

We have studied the production of prompt muons in hadronic events from e+e− annihilation at a center-of-mass energy of 29 GeV with the PEP4-TPC (Time Projection Chamber) detector. The muon p and pt distributions are well described by a combination of bottom- and charm-quark decays, with fitted semimuonic branching fractions of (15.2±1.9±1.2)% and (6.9±1.1±1.1)%, respectively. The muon spectra imply hard fragmentation functions for both b and c quarks, with 〈z(b quark)〉=0.80±0.05±0.05 and 〈z(c quark)〉=0.60±0.06±0.04. We derive neutral-current axial-vector couplings of a(b quark)=-0.9±1.1±0.3 and a(c quark)=1.5±1.5±0.5 from the forward-backward asymmetries.

ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: INCLUSIVE REACTION
MUON: ELECTROPRODUCTION
ELECTROPRODUCTION: MUON
MUON: DIRECT PRODUCTION
DIRECT PRODUCTION: MUON
CHARMED PARTICLE: ELECTROPRODUCTION

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Prompt muon production in e+e−e^+e^-e+e− annihilations at 29-GeV

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Prompt muon production in $e^+e^-$ annihilations at 29-GeV