Latest results from the MARK II at PEP | Zendy

N. S. Lockyer | Zendy

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Latest results from the MARK II at PEP

Author(s) -

N. S. Lockyer

Publication year - 1983

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/5461883

Subject(s) - physics , lepton , particle physics , annihilation , electron–positron annihilation , nuclear physics , hadron , electron , branching fraction , semileptonic decay , luminosity , quark , standard model (mathematical formulation) , fragmentation (computing) , astrophysics , archaeology , gauge (firearms) , galaxy , computer science , history , operating system

i We present single photon annihilation results from the MARK II detector at PEP based on 100 pb-l of integrated luminosity taken at a center of mass energy fi = 29 GeV. A study of inclusive leptons for momenta 2 2 GeV/c yield the average semileptonic branching ratios of bottom (b) and charm (c) quarks and information about the b fragmentation function. A measurement of the bottom hadron lifetime is presented based on a study of the prompt lepton impact parameters. In addition we report on a precise measurement of the tau lifetime and an updated Do lifetime. We also present a search for supersymmetric electrons, w.eak neutral current couplings from leptons-and bottom particles and evidence for K*‘s at PEP.

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