9087449
Study of pi + pi - transitions from the Upsilon (3S) and a search for the hb.
We have investigated the transitions Y(3S)~m+vr Y(1S), Y(3S)~~+~ Y(2S) and the cascade process Y(3S)~Y(2S)+X,Y(2S)~m+w Y(1S), both in the exclusive decay mode, with the daughter Y state decaying into two leptons, and in the inclusive decay mode, with the daughter Y state decaying hadronically. Results are presented on the branching fractions and properties of the system. The m+ ~ invariant-mass spectra for the decays Y( 3S)~~+ m Y( 1S) and Y(3S)~m ~ Y(2S) are measured and compared with theoretical predictions. We also present the results of a search for the h&(1 'P, ) and Y(1 'D) states in inclusive Y(3S) decays, and for the ex
6960296
Future of Heavy Flavour Physics: Experimental Perspective
I discuss what measurements need to be done to search for physics beyond the Standard CKM model, rather than just what studies can be done in the near future. It is also important to accurately measure the CKM matrix elements. Current best estimates for two important elements are: jVcbj=0 :03810:0021 andjVub=Vcbj=0 :0850:019. Finally, future experiments are discussed.
118259341
Leptonic and Semileptonic Decays from CLEO‐c
The CLEO‐c measurement of the purely leptonic decay rate D+ → μ+v determines the value of the pseudoscalar decay constant fD+ = (222.6 ± 16.7−3.4+2.8) MeV, allowing for a precision test of strong interaction theories. Semileptonic decay branching ratios are also summarized.
22176544
Measurement of the direct photon spectrum from the Upsilon (1S).
122170479
Particle identification by ionization measurements: Description of the CLEO dEdx system
Abstract We describe the design, construction and performance of a pressurized proportional chamber system intended to identify particles by means of their energy loss in thin gas samples. The system is part of the CLEO detector at the Cornell Electron-Positron Storage Ring (CESR).
125049924
A1 PRODUCTION IN CHARGE EXCHANGE REACTIONS
32942434
Determination of the cross sections for the production of fragments from relativistic nucleus-nucleus interactions. I. Measurements.
Relativistic iron, lanthanum, holmium, and gold projectile nuclei with several different energies have been fragmented in targets of polyethylene, carbon, aluminum, copper, and lead. Our detectors cleanly resolve the individual charges of the heaviest of these fragments and provide some limited information on the masses. We have measured 1256 elemental partial cross sections for the production of fragments from interactions in these target materials. Values have been derived for another 417 cross sections in a hydrogen medium. These cross sections depend on the energy and mass of the projectile nuclei as well as on the nature of the target. Total charge-changing cross sections were also found, but only in a composite target, and have been shown to be weakly dependent on energy. The mean mass losses observed for fragments that have lost a few protons show that typically many neutrons are lost with each proton, producing fragment nuclei that must be highly proton rich, and consequently very unstable. The cross sections for charge pickup on heavy targets show a rapid increase with decreasing energy, particularly for the heaviest targets. The systematics of the dependencies of the partial cross sections will be discussed in a companion paper.
37290502
Born-Oppenheimer approximation and the origin of Wess-Zumino terms: Some quantum-mechanical examples.
On donne des exemples de mecanique quantique dans lesquels la phase de Beny donne naissance a des termes de Wess-Zumino. On discute la relation avec l'approximation de Born-Oppenheimer
11439667
Schur functions, chiral bosons, and the quantum-Hall-effect edge states.
I demonstrate how the many-body wave function may be used to describe the bosonization of the edge excitations of a droplet of \ensuremath{\nu}=1 quantum-Hall liquid. In particular, I exhibit an isomorphism between the charge-neutral edge-state excitations of the droplet and the space of universal symmetric polynomials. There are two natural bases for this space; the first, the Schur functions, correspond to the fermion picture; the second, generated by the power sums, yields the Bose picture and the Kac-Moody algebra. I also show explicitly how the loop group LU(1) acts to create the coherent-state deformations of the droplet shape used in path-integral bosonization and in the quantization of chiral bosons.
8419154
Elementary derivation of one-dimensional fermion-number fractionalization.
29081438
Systematics of the release of residual nuclei from relativistic nucleus-nucleus interactions.
We have examined relativistic nuclei of krypton, xenon, holmium, and gold, accelerated in a partially stripped state to a maximum rigidity of about 5.6 GeV, interacting with targets of aluminum, carbon, and polyethylene. For each projectile and target combination we determined the total and partial charge changing cross sections for the production of lighter fragments. From these measurements we have developed a new representation of the dependence of the total charge changing cross sections on beam and target charge. We have also identified simple representations of the variation of the partial cross sections with the charge of the produced fragments and shown that they are dependent on the charge and energy of the beam. The fission of gold nuclei at high energies in these various targets has also been studied.