126234992
anti-B ---> D tau anti-nu tau in two Higgs doublet model
14706046
Lepton flavor violation at linear collider experiments in supersymmetric grand unified theories
Lepton flavor violation at linear collider experiments is discussed. We show that detectable lepton flavor violation could occur in scalar lepton pair production and decay in the supersymmetric SU(5) grand unified theory in spite of the stringent present experimental constraints by searches for rare processes. Possible cross sections of $\ensuremath{\sim}40$ fb for an ${e}^{+}{e}^{\ensuremath{-}}$ collider and $\ensuremath{\sim}280$ fb for an ${e}^{\ensuremath{-}}{e}^{\ensuremath{-}}$ collider are illustrated.
17486791
Neutral Scalar Higgs Masses and Production Cross Sections in an Extended Supersymmetric Standard Model
Abstract Upper bounds on the three neutral scalar Higgs masses are considered in the supersymmetric standard model with a gauge singlet Higgs field. When the lightest Higgs is singlet-dominated the second lightest Higgs is shown to lie near or below thetheoretical upper bound on the lightest Higgs mass. We also consider detectability of these Higgs bosons at a future e + e − linear collider with s ∼ 300 GeV and show that at least one of the neutral scalar Higgs has a production cross section larger than 0.04 pb.
118232341
Testing leptoquark models in $\bar B \to D^{(*)} \tau \bar\nu$
We study potential New Physics effects in the $\bar B \to D^{(*)} \tau \bar\nu$ decays. As a particular example of New Physics models we consider the class of leptoquark models and put the constraints on the leptoquark couplings using the recently measured ratios $R(D^{(*)})=BR(\bar B \to D^{(*)} \tau \bar\nu)/BR(\bar B \to D^{(*)} \mu \bar\nu)$. For consistency, some of the constraints are compared with the ones coming from the current experimental bound on $BR(B \to X_s \nu \bar\nu)$. In order to discriminate various New Physics scenarios, we examine the correlations between different observables that can be measured in future.
120323216
Elastic and inelastic scattering of 12 C + 12 C at E/A≥10 MeV and the deformation parameters
Elastic and inelastic scattering of /sup 12/C+ /sup 12/C, especially excitations of the ground-rotational-band members in /sup 12/C, have been studied at 139.5 and 158.8 MeV. Although reasonable fits to the angular distributions for the band members were obtained with a shallow optical potential, rainbowlike gross bumps observed at large angles in the elastic scattering were not explained at all by coupled-channel calculations for the rotational band. The present results of Vertical Bar..beta../sub 2/RVertical Bar and Vertical Bar..beta../sub 4/RVertical Bar obtained by the coupled-channel calculations are in good agreement with previously reported results, except some from /sup 12/C+ /sup 12/C scattering. These analyses indicate a significant difference in the deformation lengths derived depending upon the signs of the deformations. The sign of the deformation parameters is also discussed.
118590581
Tau longitudinal polarization in B -> D tau nu and its role in the search for charged Higgs boson
We study the longitudinal polarization of the tau lepton in B -> D tau nu decay. After discussing possible sensitivities of tau decay modes to the tau polarization, we examine the effect of charged Higgs boson on the tau polarization in B -> D tau nu. We find a relation between the decay rate and the tau polarization, and clarify the role of the tau polarization measurement in the search for the charged Higgs boson.
117860091
A review of recent E802 results
Some recent results are presented from AGS E802, a survey experiment which is studying reactions of 14.6 A {center dot} GeV beams of protons, {sup 16}O and {sup 28}Si on targets ranging from {sup 9}Be to {sup 197}Au. Spectra for the global forward and transverse energy are shown; in nucleus-nucleus collisions these two quantities are anticorrelated, consistent with a large amount of stopping. Slope parameters from inclusive particle spectra are presented, with the most interesting effect being an apparent heating'' of mid-rapidity protons which emerge from the collisions of the largest nuclei. Also given are preliminary data on the production of antiprotons. 8 refs., 4 figs., 1 tab.