124952299
The decay sigma-plus(minus) ---> lambda + positron(electron) + neutrino
118912831
Physics at DAPHNE
Proceedings of invited lecture at the Zuoz summer school on hadronic aspects of collider physics, August 23-31, 1994, Zuoz, Switzerland. Describes the PHI factory DAPHNE being built at Frascati, Italy, and the physics that can be done there, with emphasis on its potential for studying CP violation.
123404219
Tunnel Diode Nanosecond Coincidence Circuit
A fast coincidence circuit using tunnel diodes is described. In ideal conditions, resolving times as low as 0.5 nsec have been measured. But in a practical case of beam particles crossing scintillation counters, a typical resolving time is ≈1.5 nsec. The same circuit can also be used as an anticoincidence whose total dead time can be as low as 5 nsec.
119824982
Search for Higgs in upsilon decays with CUSB 1.5
122099852
SEARCH FOR MASSIVE PARTICLES PRODUCED IN INTERACTIONS AT 30 Bev
10672331
CP and Rare Decays
$CP$ violation experiments, new measurements of the parameters of the neutral \K\ system and searches for rare decays are summarized. Perspectives for the near future are presented.
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.
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.
125323027
TOPONIUM - Z0 INTERFERENCE AND PHENOMENOLOGY OF A EXTRA Z0 in e+ e- COLLISIONS
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.
109126633
Toponium-Z0 Interference