A novel technique for producing enhanced band width in micro and mm wave region of spectrum is presented. A new design of compact & broadband leaky wave dielectric resonator antenna is proposed using co-axially probe feed technique. Two different LWDRA are designed and their characteristic behaviors are compared. Finally, parametric study of Second Antenna has been done. With the proper design ...

We examine the so-called ρπ puzzle of the ψ(2S) decay by incorporating two inputs: One is the relative phase between the one-photon and the gluonic decay amplitude, and the other is a possible anomaly in the inclusive nonelectromagnetic decay rate of ψ(2S). We propose the possibility that in the ψ(2S) decay a hadronic decay process of long-distance origin is important in addition to the short-d...

.._ . -. We examine the possibility of finding charged Higgs bosons (H*) at the SSC. The charged Higgs boson is produced with a top quark via a gluon + bottom quark interaction (g + b + H + t). For the two Higgs doublet models, H* decays predominantly into t + b. Since the background from QCD processes will be very severe for this decay mode, we studied the H* + r + Y decay mode. Even for this ...

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...

We study the spectrum of solvable string models on plane waves descending from non-conformal Dp-brane geometries. We mainly focus on S-dual F1/D1-waves in type IIB and type I/heterotic 10D superstrings. We derive the Kaluza-Klein spectrum of N = 1, 2 10D supergravities on D1/F1-waves. We compute helicity supertraces counting multiplicities and R-charges of string excitations in the plane wave g...

Vacuum polarization of massive scalar fields in a thermal state at arbitrary temperature is studied near the horizon of a Reissner-Nordström black hole. We derived an analytic form of 〈φ2〉 approximately in the large mass limit near the black hole horizon. We uses the zeroth order WKB approximation and power series expansion near the horizon for the Euclideanized mode function. Our formula for t...

We study the critical behavior of the D (2 < D < 4) dimensional Gross-Neveu model with a Thirring interaction, where a vector-vector type four-fermi interaction is on equal terms with a scalar-scalar type one. By using inversion method up to the next-to-leading order of 1=N expansion, we construct a gauge invariant e ective potential. We show the existence of the chiral order phase transition, ...

A new formula for the composite Higgs boson mass is given, based on the WardTakahashi identity and the Schwinger-Dyson(SD) equation. In this formula the dominant asymptotic solution of the SD equation yields a correct answer, in sharp contrast to the Partially Conserved Dilatation Current(PCDC) approach where the suband sub-subdominant solutions should be taken into account carefully. In the ga...