35372756
Inclusive B-meson decays into charm.
We have measured the B-meson decay fractions into D/sup 0/, D/sup +/, and D/sup *//sup +/ mesons to be 0.39 +- 0.05 +- 0.04, 0.17 +- 0.04 +- 0.04, and 0.22 +- 0.04/sub -0.04//sup +0.07/, respectively, if we use the D/sup 0/..-->..K/sup -/..pi../sup +/ and D/sup +/..-->..K/sup -/..pi../sup +/..pi../sup +/ branching ratios determined by the Mark III Collaboration. These results suggest that B decay to noncharm final states is substantial. We also find that B decay to spin-1 D/sup */ mesons dominates over direct decay to spin-0 D mesons and that the ratio (D/sup 0/+D/sup *//sup 0/)/(D/sup +/+D/sup *//sup +/) is consistent with unity.
22176544
Measurement of the direct photon spectrum from the Upsilon (1S).
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.
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
1139726
Acoustic energy and momentum in a moving medium
By exploiting the mathematical analogy between the propagation of sound in a nonhomogeneous potential flow and the propagation of a scalar field in curved space-time, various wave "energy" and wave "momentum" conservation laws are established in a systematic manner. In particular, the acoustic energy conservation law due to Blokhintsev appears as the result of the conservation of a mixed covariant and contravariant energy-momentum tensor, while the exchange of relative energy between the wave and mean flow, first noted by Longuet-Higgins and Stewart in the context of ocean waves, appears as the covariant conservation of the doubly contravariant form of the same energy-momentum tensor.
44832895
Charge, mass, and energy changes during fragmentation of relativistic nuclei.
We have examined the fragmentation of relativistic lanthanum and gold nuclei incident on targets of polyethylene, carbon, aluminum, and copper. Attention has been concentrated on those fragments whose atomic numbers were only changed by +1 to -3 from those of the incident nuclei. The cross section for the production of fragments with increased charge is about 10% that for fragments that have lost one charge, or about 1% of the total interaction cross section. We find that the velocity distributions of these fragments can be explained by assuming that they also lose significant numbers of neutrons when they pick up or lose charge, without a need to invoke any energy or momentum loss in the interaction, although we cannot exclude small losses. In particular, we cannot confirm the recent report of large energy losses during the charge pickup process. The relative numbers of neutrons lost can be represented by a simple Gaussian model, and, for those fragments with decreased charge, are much larger than the proton losses. These fragments consequently have large proton excesses and will be highly unstable.
23950285
Coherent-state path integrals and the bosonization of chiral fermions.
By using coherent-state path integrals I provide a derivation of a two-dimensional chiral boson action which is equivalent to a free Weyl fermion.
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.
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.