In this paper we use the explicit description of the Spin– 3 2 Dirac operator in real dimension 3 appeared in [17] to perform the algebraic analysis of the space of nullsolution of the system of equations given by several Rarita– Schwinger operators. We make use of the general theory provided by [10] and some standard Gröbner Bases techniques. Our aim is to show that such operator shares many o...

We set a preliminary 95% C.L. exclusion on the oscillation frequency of B 0 s − B 0 s mixing using a sample of 400,000 hadronic Z 0 decays collected by the SLD experiment at the SLC between 1996 and 1998. The analyses determine the b-hadron flavor at production by exploiting the large forward-backward asymmetry of polarized Z 0 → bb decays as well as information from the hemisphere opposite tha...

We perform the comprehensive analysis of the pentaquark (5Q) in JP = 3/2± channel using anisotropic quenched lattice QCD. We employ the standard Wilson gauge action at β = 5.75 and the O(a) improved Wilson (clover) quark action on a 123 ×96 lattice with the renormalized anisotropy as as/at = 4. A large number of gauge configurations as Nconf = 1000 is analyzed, which is found to be essential to...

We develop a relativistic covariant and unitary description of the pion-nucleon interaction in a hadron-exchange model. The model is based on the solution of a dimensionally reduced (quasipotential) Bethe-Salpeter equation for the partial-wave off-shell πN scattering amplitudes with the potential consisting of the field-theoretical sand u-channel nucleon, Roper, Delta, D13, S11 exchanges, and t...

In this letter the boundary problem for massless and massive Rarita-Schwinger field in the AdS/CFT correspondence is considered. The considerations are along the lines of a paper by Henneaux [24] and are based on the requirement the solutions to be a stationary point for the action functional. It is shown that this requirement, along with a definite asymptotic behavior of the solutions, fixes t...

Massless diquark jet and gluon jet productions at large transverse momentum in the coherent diffractive processes at hadron colliders are studied in the two-gluon exchange parametrization of the Pomeron model. We use the helicity amplitude method to calculate the cross section formulas. We find that for the light quark jet and gluon jet production the diffractive process is related to the diffe...

Formulation of the heavy quark on the lattice, such as NRQCD[1] or the Fermilab approach with the Wilson-like relativistic quarks[2], requires perturbative matching with the continuum theory. Since the quark mass in the lattice unit cannot be neglected for these theories, the perturbative calculation is much more involved and have not developed as that for the massless case. We report the curre...

The decays B+ → D∗+ s γ and B+ → D∗+γ can be used for an extraction of |Vub|. When the b and c quarks are nearly degenerate the rate for these modes can be determined in terms of other observed rates, namely BB mixing and D → Dγ decay. To this end we introduce a novel application of heavy quark and flavor symmetries. Although somewhat unrealistic, this limit provides us with a first estimate of...

Prolonged exposure to movement perturbations leads to creation of motor memories which decay towards previous states when the perturbations are removed. However, it remains unclear whether this decay is due only to a spontaneous and passive recovery of the previous state. It has recently been reported that activation of reinforcement-based learning mechanisms delays the onset of the decay. This...