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°.
124952299
The decay sigma-plus(minus) ---> lambda + positron(electron) + neutrino
115880474
The muon gyromagnetic ratio and e+e- annihilations
125185394
CHARGED SIGMA HYPERON DECAYS INTO MUONS
118043522
Where are the Higgs
185411222
CP in K and B decays
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.
120474408
Fine structure of the P states in heavy quarkonium and the nature of the spin-dependent potential
Abstract We discuss the failure of existing theories to agree with the experimental measurements of the fine structure of the χ states of the b b and c c systems. We rule out various possible explanations, such as mixing of the 2P triplet with the 1F triplet. We use thefact that the spin-independent potential is well-determined in the relevant range to extract accurate determinations of expectation values of the spin-dependent potentials providing tests for future theories. We find that the usual ansatz that the q q interaction has effective vector and scalar contributions only is very unlikely to be sufficient to explain the fine structure of the 3 P levels and to accomodate the recent measurement of the mass of the 1 P state in charmounium.
125325652
Fine structure of the P states in quarkonium and the spin dependent potential
124263871
FLAVOR MIXING, epsilon-prime / epsilon ...: A REAFFIRMATION OF THE STANDARD MODEL
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.