78 research outputs found
\tau\to \mu \bar{\nu_i} \nu_i decay in the general two Higgs doublet model
We study \tau\to \mu \bar{\nu_i} \nu_i, i=e,\mu,\tau decay in the model III
version of the two Higgs doublet model. We calculated the BR at the order of
the magnitude of 10^{-6}-10^{-4} for the intermediate values of the Yukawa
couplings. Furthermore, we predict the upper limit of the coupling for the
\tau-h^0 (A^0)-\tau transition as \sim 0.3 in the case that the BR is \sim
10^{-6}. We observe that the experimental result of the process under
consideration can give comprehensive information about the physics beyond the
standard model and the free parameters existing.Comment: 9 pages, 5 figure
Event shapes in e+e- annihilation and deep inelastic scattering
This article reviews the status of event-shape studies in e+e- annihilation
and DIS. It includes discussions of perturbative calculations, of various
approaches to modelling hadronisation and of comparisons to data.Comment: Invited topical review for J.Phys.G; 40 pages; revised version
corrects some nomenclatur
Resolved Photon Processes
We review the present level of knowledge of the hadronic structure of the
photon, as revealed in interactions involving quarks and gluons ``in" the
photon. The concept of photon structure functions is introduced in the
description of deep--inelastic scattering, and existing
parametrizations of the parton densities in the photon are reviewed. We then
turn to hard \gamp\ and \gaga\ collisions, where we treat the production of
jets, heavy quarks, hard (direct) photons, \jpsi\ mesons, and lepton pairs. We
also comment on issues that go beyond perturbation theory, including recent
attempts at a comprehensive description of both hard and soft \gamp\ and \gaga\
interactions. We conclude with a list of open problems.Comment: LaTeX with equation.sty, 85 pages, 29 figures (not included). A
complete PS file of the paper, including figures, can be obtained via
anonymous ftp from
ftp://phenom.physics.wisc.edu/pub/preprints/1995/madph-95-898.ps.
A search for monojet events produced by virtual Z bosons in e e annihilation at PETRA
SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
A search for the supersymmetric chargino in e e annihilation at PETRA
SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
A measurement of the eta radiative width GAMMAeta-> )
SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Comparison of 3-jet events with QCD shower models
SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Tau-lepton production and decay at PETRA energies
SIGLEAlso published in Phys. Lett., B (24 Oct 1985) v. 161(1-3) p. 188-196 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Lepton pair production in double tagged two-photon interactions
SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
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