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Showing 1 to 20 of 613 for “"GEV"”.
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Photoproduction of π0 on Hydrogen With CLAS From 1.1 GeV - 5.45 GeV Using e+e –γ Decay
… spanning the range <em>E</em><sub>γ</sub> = 1.1 GeV - 5.45 GeV. The measurement is performed on a liquid hydrogen target in the reaction γ<em>p</em> → <em>pe</em> <sup>+</sup><em>e</em><sup>–</sup>(γ). The final state of the reaction is the sum of two subprocesses for π<sup>0</sup> decay, the …
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PRECISION MEASUREMENT OF QUASI-ELASTIC TRANSVERSE AND LONGITUDINAL RESPONSE FUNCTIONS IN THE RANGE 0.55 GeV/cj <q <1.0 GeV/c
… electrons with energies ranging from 0:4 GeV to 4 GeV scattered off 4He,12C,56Fe and 208Pb nuclei at four scattering angles (15;60;90;120) and scattered energies ranging from 0:1 GeV to 4 GeV. The Born cross sections were extracted for the Left High Resolution Spectrometer (LHRS) and the …
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A Measurement of the Reactions pp→ɳɳ, pp→πºɳ and pp→πºπº from 1.188 GeV/c to 1.445 GeV/c
Submitted by Rachelle Ramer (rramer2@illinois.edu) on 2012-05-17T17:06:40Z No. of bitstreams: 1 1998_ritter.pdf: 3801579 bytes, checksum: b8c5dc3a73aae07dd4beefd829f163ca (MD5)
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Production of omega and phi mesons by 193 GeV/c pions and 250 GeV/c protons on a beryllium target
Qmegas and phis were observed in di-muon events. Differential cross sections with respect to perpendicular momentum and Feynman-X for both meson types and both beam types are compared. When a simple parton fusion model is used to describe the Feymnan-X distributions the omega appears to be produced …
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Study of the quasielastic ³He(e,e'p) reaction at Q² = 1.5 (GeV/c)² up to missing momenta of 1 GeV/c
As a part of the E89044 experiment at Hall A of Jefferson Lab, we have studied the quasielastic ³He(e,e'p) reaction in perpendicular coplanar kinematics, with energy and momentum transfer by the electron fixed at 837 MeV and 1500 MeV/c respectively, at three beam energies of 1255, 1954 and 4807 …
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The reactions K-p -> Sigma±pi±, Sigma±pi±pi+pi-, and Sigma±pi±K+K- at 4.1 GeV/c and 5.5 GeV/c
… were obtained from K-p interactions at 4.1 GeV/c and 5.5 GeV/c in the MURA thirty-inch hydrogen bubble chamber. K track lengths equivalent to 0.95 IJ.b per event and 0.27 IJb per event have been analyzed at 4.1 GeV/c and 5.5 GeV/c, respectively. Differential cross sections are given for the …
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Lambda-Produktion in Pb-Au-Kollisionen bei 40 A GeV
… in Pb+Au Kollisionen bei 40 A,GeV Strahlenergie analysiert werden. Gegenstand der vorliegenden Arbeit ist Design und Bau der CERES-Spuren-drift-kammer und eine Auswertung erster Testmessungen hinsichtlich einer Detektoroptimierung, sowie eine $Lambda$-Analyse der 40 A,GeV-Daten. …
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Three-Pion Production on Complex Nuclei at 23 Gev/c
Made available in DSpace on 2015-05-13T15:21:58Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7606927.PDF: 3644149 bytes, checksum: b4284c2fb3b0a3c1b78d0e325de45918 (MD5) Previous issue date: 1975
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Three pion production on complex nuclei at 23 GeV/c
An analysis of three pion production data at 23 GeV/c is described; these reactions are of the form pi- -> pi+pi-pi-A where A is one of the nuclear targets: carbon, aluminum, copper, silver, or lead. Total and differential cross-sections are quoted, and the method of their computation is outlined. …
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The neutron electric form factor to Q² = 1.45 (GeV/c)²
The nucleon elastic electromagnetic form factors are fundamental quantities needed for an understanding of nucleon and nuclear electromagnetic structure. The evolution of the Sachs electric and magnetic form factors with Q2, the square of the four-momentum transfer, is related to the distribution …
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Charge exchange of K⁺ on platinum at three GeV/c.
Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1971. Ph.D.
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Electroproduction of the Phi(1020) Vector Meson at 4 GeV
We studied the reaction 𝑒𝑝 → 𝑒′𝑝′𝜙 with a 4.2 GeV incident electron beam in the region of the electroproduction variables Q² from 0.7 to 2.2 GeV² and W from 2.0 to 2.6 GeV. The data were taken and analyzed at the Thomas Jefferson National Accelerator Facility. For the first time, we observe the …
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Measurements of Compton Scattering on the Proton at 2--6 GeV
… Scattering (RCS) on the proton for 2.3-5.7 GeV electron beam energies and a wide distribution of large scattering angles. The 25 kinematic settings sampled a domain of s = 5-11(GeV/c)2, -t = 2-7(GeV/c)2 and -u = 0.5-6.5( GeV/c)2. In addition, a measurement of longitudinal and transverse …
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Measurements of Charm Meson Production in 10.5 GeV Electron -Positron Annihilations
… e+ e- gamma* → cc¯ events at s = 10.5 GeV is presented. Included are measurements of the fragmentation distributions of D+s and D*+s , the vector to pseudoscalar production ratio for Ds, and the D*+ spin alignment. A description of the new trigger designed for the CLEO III detector is …
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Strange Quark Suppression in 225 Gev/c Negative Pion Beryllium Interactions
… of (omega)(783) and (phi)(1020) mesons in 225 GeV/c (pi)('-) Be interactions via their decays into (mu)('+)(mu)('-). Based on the observed (phi)/(omega) production ratio, the strange quark suppression factor (lamda) was determined to be 0.31 (+OR-) 0.05, in good agreement with a world average …
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Measurements of Compton scattering on the proton at 2-6 GeV
… Scattering (RCS) on the proton for 2.3-5.7 GeV electron beam energies and a wide distribution of large scattering angles. The 25 kinematic settings sampled a domain of s = 5−11(GeV/c)2, −t = 2−7(GeV/c)2 and −u = 0.5−6.5(GeV/c)2. In addition, a measurement of longitudinal and transverse …
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Measurements of Charm Meson Production in 10.5 GeV Electron-Positron Annihilations
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-12T20:39:01Z No. of bitstreams: 1 2000_johnson.pdf: 3447638 bytes, checksum: df5cb10ed87740c1ce63288a2ef68f4b (MD5)
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Strange quark suppression in 225 GEV/C pi-minus beryllium interactions
… of W (783) and rp (1020) mesons in 225 GeV/c pi--Be interactions via their decays into pi+pi- ratio, the strange quark suppression factor.A was determined to be 0.31 ± 0.05, in good agreement with a world average of about 0.29.
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Electron-positron annihilation into photons at √s = 50 to 64 GeV
… Data are presented at CM energies from 50 to 64 GeV, with a total integrated luminosity of 189.1 pb⁻¹. Differential cross sections for e⁺e⁻ → γγ, γγγ are measured and compared to 𝛰(α³) QED. A search for electron compositeness through an e⁺e⁻ γγ contact interaction is conducted, and limits are …
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