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CESIUM-IODINE DESIGNATED NUCLEUS.
CESIUM-IODINE DESIGNATED NUCLEUS.
CESIUM-IODINE DESIGNATED NUCLEUS.
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A partial wave analysis of theK\(\bar K\) system produced by 8.25 GeV/cK− mesons in the reaction\(K^ -p \to K\bar K\Lambda ^{ 0} \) has been performed, taking into account the information provided by the Λ0 decay. Thef′ region is dominated byD0(−) andD1(+) waves. We see no evidence for the production of new 0++ states in the mass region 1.05 to 1.75 GeV.
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We have studied the quasielastic reaction νμn→μ−p in an exposure of the Fermilab deuterium-filled 15-foot bubble chamber to a high-energy wide-band neutrino beam. From an analysis of the Q2 distribution based on the standard V−A theory, the axial-vector mass in a dipole parametrization of the axial-vector form factor is determined to be MA=1.05−0.16+0.12 GeV, consistent with the values previously reported from low-energy experiments.
Measured Quasi-Elastic total cross section.
We report on an experiment in which the SLAC 40-in. hybrid facility was exposed to an 8.8-GeV/c antiproton beam. Using external detectors we have identified a large fraction of nonannihilation events and thus obtained a clean sample of annihilation data. Using proton interactions taken in the same detector at the same energy we have made a detailed study of (p¯p−pp) differences and explored their relationship to p¯p annihilations.
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The authors have measured the inclusive production of direct photons in the transverse momentum (pT) range 2.1-5.0 GeV/c in 200-GeV/c collisions of protons and π+ mesons on a carbon target. A significant yield of direct photons was observed for pT>2.5 GeV/c. The invariant cross section for direct-photon production, when compared with measurements from the CERN intersecting storage rings, can be expressed in terms of pT and xT=2pTs as (42±14)(1−xT)8.1±1.0pT−6.6±0.3 μb/GeV2 for the c.m. energy range from s=19.4 to 63 GeV, and for the xT range from 0.2 to 0.5.
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The authors have measured the large-pT inclusive cross sections for π0 and η production near 90° in the center-of-mass system in 200-GeV/c π+ and proton collisions with beryllium, carbon, and aluminum targets. The cross section for both π0 and η mesons rises with increasing nucleon number (A) of the target nucleus as Aα, with α>1. The ratio of the π0 yield in pA collisions to that in π+A collisions decreases with increasing pT.
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