[en] The recombination model predictions for baryon production, using modified Kuti-Weisskopf structure functions, are in good agreement with the pp and πp collision data. The indistinguishability of sea quarks naturally accounts for the difference in the p and anti p spectra in the pion fragmentation region. 4 figures, 2 tables

[en] The high energy physics research program at the University of Hawaii is directed toward the study of the properties of the elementary particles and the application of the results of these studies to the understanding of the physical world. Experiments using high energy accelerators are aimed at searching for new particles, testing current theories, and measuring properties of the known particles. Experiments using cosmic rays address particle physics and astrophysical issues. Theoretical physics research evaluates experimental results in the context of existing theories and projects the experimental consequences of proposed new theories

[en] The recombination model predictions for baryon production, using modified Kuti-Weisskopf structure functions, are in good agreement with the pp and πp collision data. The indistinguishability of sea quarks naturally accounts for the difference in the p and anti p spectra in the pion fragmentation region. 4 figures, 2 tables

[en] We have considered the possibility of detecting the scalar lepton at SLC or LEP by studying the energy and angular distributions of dileptons produced via e⁺e^- → l⁺l^- → l⁺γ l^-γ. It is shown that the scalar lepton is characterized by a flat lepton energy spectrum. 17 refs., 3 figs

[en] It is pointed out that many models of the radiative decay of the Z⁰ boson would necessitate a new two photon-two lepton effective interaction in an SU(2) x U(1) invariant theory. We study the effect of this interaction and show that its effect is negligible in QED processes at present energies. Possibilities of detecting it at future colliders are also discussed. 8 refs. 2 figs

[en] We investigate signals for winos and zinos when the decays W → wino + photino, Z → wino + antiwino, and W → wino + zino are allowed at proton-antiproton colliders. These processes lead to: (1) monojet and dijet plus missing transverse momentum (p/sub T/) events; (2) various di- and tri-lepton events with little accompanying hadronic activity; and (3) events containing jets plus leptons plus p/sub T/. Absence of such signals may allow new limits to be placed on m/sub wino/ and m/sub zino/ of at least m/sub wino/ + m/sub zino/ greater than or equal to m/sub W/, from CERN collider data. 11 refs., 4 figs

[en] One of the crucial predictions of supersymmetric models that reduce to the Minimal Supersymmetric Standard Model (MSSM) at the weak scale is that the lightest Higgs scalar should have mass m_h approx_lt 125-130 GeV[1]. Recent results on the reach of Fermilab Tevatron upgrades for Standard Model (SM) Higgs bosons show that masses of order 120-180 GeV may be probed [2, 3, 4, 5], depending on integrated luminosity, detector performance and signal and background modeling. Thus, the discovery of a Higgs boson (or a new limit of around 120-130 GeV on its mass) will severely constrain supersymmetric models as well. In this report, we update previous calculations made by our group [6] pertaining to the reach of Fermilab Tevatron upgrades for Higgs bosons in supersymmetric models. We present reach results for SUSY Higgs bosons within the MSSM, the minimal Supergravity model (mSUGRA) and in the minimal Gauge Mediated SUSY Breaking model (mGMSB). In this update, 95% CL exclusion contours and 5σ discovery contours are presented for integrated luminosity values of 2, 5 and 20 fb^-1

[en] It is demonstrated that the differential cross-section for multiparticle production via the production and subsequent decay of a heavy, spinning particle factorizes into a production piece and a decay piece provided we choose our kinematic variables properly and the parent decays into at least three particles. 11 refs

[en] We have computed, in detail, the energy and angular distribution of the leptons (l) produced by the decay of winos (W) via the reaction e⁺e^- → W⁺ + W^- → l⁺nuγ + l^-anti nuγ within the framework of a supergravity electroweak model. We have also computed the backgrounds to this reaction from the production and subsequent decays of tau⁺tau^- pairs or pairs of new sequential heavy leptons. We conclude that it is possible to distinguish the wino from an ordinary heavy lepton and, moreover, that winos lighter than the W-boson would be clearly identifiable at LEP energies. 22 refs., 3 figs

[en] We discuss the decay of the W-boson into supersymmetric particles and the decays of these particles in a unified theory in which gravity breaks SU_L(2) x U(1). If the decay W → W tilde Z tilde is kinematically possible, the subsequent decay of the gauginos may provide a definitive signature for supersymmetry