S. Y. Tsai

How Do Neutrinos Propagate?: Wave-Packet Treatment of Neutrino Oscillation

The wave-packet treatment of neutrino oscillation developed previously is extended to the case in which momentum distribution functions are taken to be a Gaussian form with both central values and dispersions depending on the mass eigenstates of the neutrinos. It is shown among other things that the velocity of the neutrino wave packets does not in general agree with what one would expect classically and that relativistic neutrinos emitted from pions nevertheless do follow, to a good approximation, the classical trajectory.The wave-packet treatment of neutrino oscillation developed previously is extended to the case in which momentum distribution functions are taken to be a Gaussian form with both central values and dispersions depending on the mass eigenstates of the neutrinos. It is shown among other things that the velocity of the neutrino wave packets does not in general agree with what one would expect classically and that relativistic neutrinos emitted from pions nevertheless do follow, to a good approximation, the classical trajectory.

CP, T and/or CPT violations in the

Possible violation of CP, T and/or CPT symmetries in the

K^0 - \overline K^0

\ko

system: Implications of the KTeV, NA48 and CPLEAR results

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Diquark scattering model for hadron multiplicities in μp interactions

\kob

Electroweak Gauge Models and Lepton Conservation Laws

system is studied from a phenomenological point of view. For this purpose, we first introduce parameters which represent violation of these symmetries in mixing parameters and decay amplitudes in a convenient and well-defined way and, treating these parameters as small, derive formulas which relate them to the experimentally measured quantities. We then perform numerical analyses, with the aid of the Bell-Steinberger relation, to derive constraints to these symmetry-violating parameters, firstly paying particular attention to the results reported by KTeV Collaboration and NA48 Collaboration, and then with the results reported by CPLEAR Collaboration as well taken into account. A case study, in which either CPT symmetry or T symmetry is assumed, is also carried out. It is demonstrated that CP and T symmetries are violated definitively at the level of 10^{-4} in

A generalSU(2)L×SU(2)R×U(1)B−L gauge model and experimental constraints

2\pi

The Generalized Stueckelberg Formalism and the Glashow-Weinberg-Salam Electroweak Model

decays and presumably at the level of 10^{-3} in the

CP, T and CPT violations in the K0−K0 system: present status

\ko-\kob

Experimental Constraints to Rephasing-Invariant CP, T and CPT Violating Parameters in the Neutral Kaon System

mixing, and that the Bell-Steinberger relation helps us to establish CP and T violations being definitively present in the