3,359 research outputs found
Chiral Logarithms in Kaon Decay Amplitudes in General Effective Flavor Theories
We study the chiral logarithms in kaon decay amplitudes from new
flavor physics in beyond-standard-model theories. We systematically classify
the chiral structures of dimension-5, 6 and 7 effective QCD operators
constructed out of light-quark (up, down and strange) and gluon fields. Using
the standard chiral perturbation theory, we calculate the leading
chiral-logarithms associated with these operators. The result is useful for
lattice calculations of the QCD matrix elements in decay
necessary, for example, to understand the physical origin of the direct CP
violation parameter . As a concrete example, we consider the new
operators present in minimal left-right symmetric models
Constacyclic Codes over Finite Fields
An equivalence relation called isometry is introduced to classify
constacyclic codes over a finite field; the polynomial generators of
constacyclic codes of length are characterized, where is the
characteristic of the finite field and is a prime different from
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