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6 papers · 2 filters
Lepton-Flavour Violation in Ordinary and Supersymmetric Grand Unified Theories
C. S. Lim, Bungo Taga
By an explicit calculation we show that in ordinary SU(5) logarithmic divergence in the amplitude of cancels among diagrams and remaining finite part is suppressed by at…
Grand Unified Theories and Lepton-Flavour Violation
C. S. Lim
Lepton-flavour violating processes, such as , are studied in ordinary (non-SUSY) SU(5) and SUSY SU(5) grand unified theories. First given are some introductory argument on…
A New Parametrization of Polarized Parton Distribution Functions
T. Morii
Requiring the positivity and counting rule, we propose a new parametrization of the polarized parton distribution which reproduce the data well. We found that the NLO analysis is a…
Remark on CP-violating Polarization Asymmetry of tt-bar via Anomalous Couplings to gamma and Z
Zenro Hioki, Kazumasa Ohkuma
We calculate the CP-violating polarization asymmetry of tt-bar, delta =[ sigma(ee-bar --> t(-)t-bar(-))-sigma(ee-bar --> t(+)t-bar(+)) ]/ sigma(ee-bar --> tt-bar), for the most gen…
Phase transition of a scalar field theory at high temperatures
Hidenori Sonoda
At high temperatures a four dimensional field theory is reduced to a three dimensional field theory. In this letter we consider the theory whose parameters are chosen so that…
Heavy Quark Productions with Spin
T. Morii
Heavy quark productions in high energy polarized scatterings are reviewed from a personal point of view. After mentioning why heavy quark physics is so interesting, I concentrate o…