119064115
Exploring flavor structure of supersymmetry breaking at $B$ factories
We investigate quark flavor signals in three different supersymmetric models, the minimal supergravity, the SU(5) SUSY GUT with right handed neutrinos, and the minimal supersymmetric standard model with U(2) flavor symmetry, in order to study physics potential of the present and future $B$ factories. We evaluate CP asymmetries in various B decay modes, $\Delta m_{B_s}$, $\Delta m_{B_d}$, and $\epsilon_K$. The allowed regions of the CP asymmetry in $B\to J/\psi K_S$ and $\Delta m_{B_s}/\Delta m_{B_d}$ are different for the three models so that precise determinations of these observables in near future experiments are useful to distinguish the three models. We also investigate possible deviations from the standard model predictions of CP asymmetries in other B decay modes. In particular, a large deviation is possible for the U(2) model. The consistency check of the unitarity triangle including $B\to \pi\pi,\rho\pi,D^{(*)}K^{(*)},D^{(*)}\pi,D^{*}\rho$, and so on, at future high luminosity $e^+e^-$ $B$ factories and hadronic $B$ experiments is therefore important to distinguish flavor structures of different supersymmetric models.
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.
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.
126234992
anti-B ---> D tau anti-nu tau in two Higgs doublet model
119064115
Exploring flavor structure of supersymmetry breaking at $B$ factories
We investigate quark flavor signals in three different supersymmetric models, the minimal supergravity, the SU(5) SUSY GUT with right handed neutrinos, and the minimal supersymmetric standard model with U(2) flavor symmetry, in order to study physics potential of the present and future $B$ factories. We evaluate CP asymmetries in various B decay modes, $\Delta m_{B_s}$, $\Delta m_{B_d}$, and $\epsilon_K$. The allowed regions of the CP asymmetry in $B\to J/\psi K_S$ and $\Delta m_{B_s}/\Delta m_{B_d}$ are different for the three models so that precise determinations of these observables in near future experiments are useful to distinguish the three models. We also investigate possible deviations from the standard model predictions of CP asymmetries in other B decay modes. In particular, a large deviation is possible for the U(2) model. The consistency check of the unitarity triangle including $B\to \pi\pi,\rho\pi,D^{(*)}K^{(*)},D^{(*)}\pi,D^{*}\rho$, and so on, at future high luminosity $e^+e^-$ $B$ factories and hadronic $B$ experiments is therefore important to distinguish flavor structures of different supersymmetric models.
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.
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.