109126633
Toponium-Z0 Interference
18733530
Effects of a new heavy neutral vector boson at SLC and LEP
Models with an extra neutral gauge boson (Z') are discussed. We constrain the Z' mass as a function of its mixing angle with the known Z/sup 0/ by requiring that the Z/sup 0/ mass not be shifted excessively by this mixing, and from the Higgs vacuum expectation value structure of the mass matrix. We compare these limits with those previously found from neutral current experiments. We discuss possible effects of non-excluded models on e/sup +/e/sup -/ physics at SLC and LEP. 8 refs., 3 figs.
125325652
Fine structure of the P states in quarkonium and the spin dependent potential
117191069
Higgs Search at LEP
122032304
epsilon-prime / epsilon: Review and recent progress
The evolution of the theoretical perspective on {epsilon}{prime}/{epsilon} is reviewed. The introduction of the Z{sup O} penguin and the effects of high M{sub t} are discussed, in particular the possibility for {epsilon}{prime}/{epsilon} to be identically zero. Recent calculations of {epsilon}{prime}/{epsilon} based on current estimates and bounds on the input parameters are presented. 41 refs., 13 figs.
116811819
Toponium and two-Higgs models
Bounds from B/sup 0/ - anti B/sup 0/ mixing on charged-Higgs-boson masses and couplings in two-Higgs-doublet models are presented. These bounds are comparable to those obtained, with additional assumptions, from the neutral-K-system. The effects of the neutral Higgs bosons of these models on the spectrum and wave function of toponium are discussed. These effects could, in the future, lead to limits on, or the discovery of, these Higgs bosons. 8 refs., 3 figs.
123570371
A bubble chamber experiment to measure the polarization of the recoil proton in the photoproduction of π0 mesons from hydrogen
SummaryA rapid cycling bubble chamber is used to measure the polarization of the recoil proton from the reaction γ+p→π0+p. The experimental setup and the method of analysis of the events are described. We give a preliminary result of the polarization for a mean photon energyk=725 MeV and a center of mass angle of 87°.RiassuntoUna camera a bolle a ciclo rapido è stata adoperata per misurare la polarizzazione del protone di rinculo della reazione γ+p→π0+p. Vengono descritte la disposizione sperimentale e il metodo di analisi degli eventi. Si dà il risultato preliminare per la polarizzazione a un’energia media dei fotonik=725 MeV e ad un angolo di emissione nel sistema del baricentro di 87°.
124006334
The D0 Detector for the Fermilab Collider and the Future Physics Program at CESR
By late ’86 the Fermilab superconducting ring is expected to be operating as a proton-antiproton collider, sometimes known as TEV I, at a c.m. energy \(\sqrt s = 2\) TeV, with a luminosity of 1030 cm-2s-1. Concurrently a machine improvement program is under way at the CESR e+e- collider at Cornell, with the aim to raise the collider luminosity up to values of ~ 5 pb-1 day-1. Two new detectors have been designed to take advantage of the promises of the new colliders in several fields of particle physics: the ‘DO’ detector at Fermilab and the ‘CLEO II’ detector at CESR. The design principles of the two detectors and some examples of the physics which they can address are presented.
115294420
THE D0 DETECTOR FOR THE FERMILAB COLLIDER
121920151
Annihilations of Antiprotons at Rest in Hydrogen. V. Multipion Annihilations
Approximately 45 000 pionic annihilations of stopped antiprotons in hydrogen have been measured and analyzed. The relative annihilation rates into the various multipion final states are presented. The experimental distributions of the invariant masses of all the possible pion combinations have been obtained. Strong production of the $\ensuremath{\rho}$, $\ensuremath{\omega}$, and $\ensuremath{\eta}$ meson has been observed, and their production rates have been established. The rates for simultaneous production of ${\ensuremath{\rho}}^{0}{\ensuremath{\rho}}^{0}$, ${\ensuremath{\rho}}^{0}{\ensuremath{\omega}}^{0}$, and ${\ensuremath{\rho}}^{0}{\ensuremath{\eta}}^{0}$ are discussed.
117464942
STUDY OF $Sigma$ LEPTONIC DECAY USING AN HPD IN A PATTERN RECOGNITION MODE.