5,607,394 research outputs found
On a converse theorem for over finite fields
In this paper, we prove certain multiplicity one theorems and define twisted
gamma factors for irreducible generic cuspidal representations of split
over finite fields of odd characteristic. Then we prove the first converse
theorem for exceptional groups, namely, and -twisted gamma factors
will uniquely determine an irreducible generic cuspidal representation of
Perturbative renormalization factors for generic four-quark operators in domain-wall QCD with improved gauge action
We calculate one-loop renormalization factors of generic DeltaS=2 four-quark
operators for domain-wall QCD with the plaquette gauge action and the Iwasaki
gauge action. The renormalization factors are presented in the modified minimal
subtraction (MS-bar) scheme with the naive dimensional regularization. As an
important application we show how to construct the renormalization factors for
the operators contributing to K^0-K^0bar mixing in the supersymmetric models
with the use of our results.Comment: 22 pages,uses revtex
Zappa-Sz\'ep products of Garside monoids
A monoid is the internal Zappa-Sz\'ep product of two submonoids, if every
element of admits a unique factorisation as the product of one element of
each of the submonoids in a given order. This definition yields actions of the
submonoids on each other, which we show to be structure preserving.
We prove that is a Garside monoid if and only if both of the submonoids
are Garside monoids. In this case, these factors are parabolic submonoids of
and the Garside structure of can be described in terms of the Garside
structures of the factors. We give explicit isomorphisms between the lattice
structures of and the product of the lattice structures on the factors that
respect the Garside normal forms. In particular, we obtain explicit natural
bijections between the normal form language of and the product of the
normal form languages of its factors.Comment: Published versio
Analysis of the decay
In this paper we study the angular distribution of the rare B decay , which is expected to be observed soon. We use the
standard effective Hamiltonian approach, and use the form factors that have
already been estimated for the corresponding radiative decay . The additional form factors that come into play for the dileptonic
channel are estimated using the large energy effective theory (LEET), which
enables one to relate the additional form factors to the form factors for the
radiative mode. Our results provide, just like in the case of the
resonance, an opportunity for a straightforward comparison of the basic theory
with experimental results which may be expected in the near future for this
channel.Comment: 14 pages, 5 figures; as accepted for Phys. Rev.
Electroweak properties of the , and in the three forms of relativistic kinematics
The electromagnetic form factors, charge radii and decay constants of pion, K
and K*(892) are calculated using the three forms of relativistic kinematics:
instant form, point form and (light) front form. Simple representations of the
mass operator together with single quark currents are employed with all the
forms. Making use of previously fixed parameters, together with the constituent
quark mass for the strange quark, a reasonable reproduction of the available
data for form factors, charge radii and decay constants of pion, rho, K and
K*(892) is obtained in front form. With instant form a similar description, but
with a systematic underestimation of the vector meson decay constants is
obtained using two different sets of parameters, one for pion and rho and
another one for K and K*(892). Point form produces a poor description of the
data.Comment: Accepted in Eur. Phys. Jour. A (2005
Analysis of and vertices and branching ratio of
In this paper, the strong form factors and coupling constants of
and vertices are investigated within the three-point QCD sum rules
method with and without the symmetry. In this calculation, the
contributions of the quark-quark, quark-gluon, and gluon-gluon condensate
corrections are considered. As an example of specific application of these
coupling constants, the branching ratio of the hadronic decay is analyzed based on the one-particle-exchange which is one of the
phenomenological models. In this model, decays into a
intermediate state, and then these two particles exchange a producing
the final and mesons. In order to compute the effect of these
interactions, the and form factors are needed.Comment: 14 pages, 8 figures. arXiv admin note: substantial text overlap with
arXiv:1509.0171
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