611 Result(s)
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Article
Charged ρ photoproduction in the energy range 2.8–4.8 GeV
Measurements of the photoproduction processes γρ→ρ+ n and γρ→ρ-Δ++ (1236) are reported in the energy range 2.8 to 4.8 GeV. The data show shrinkage of the differential cross section in this energy region for the p...
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Article
Strangeness exchange in the photoproduction ofK + Λ(1520) between 2.8 and 4.8 GeV
A tagged photon beam (2.8<E γ<4.8 GeV) and multiparticle spectrometer have been used to study the photoproduction in hydrogen ofK +Λ(1520). Precise values for the mass and width of the Λ(1520) are given. The tota...
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Article
Photoproduction of πΔ(1.232) from hydrogen in the energy range 2.4–4.8 GeV
We present differential cross sections andΔ ++ spin density matrix elements for the photoproduction processγp→π − Δ ++ and differential cross sections for the processγp→π + Δ 0. The incident photon energy depende...
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Article
Photoproduction of ϱ′(1.2) and ϱ′(1.6) in the final states π+ π− π+ π− and π+ π− π0 π0
The elastic photoproduction of four pions has been studied at incident photon energies between 2.8 and 4.8 GeV. Production cross-sections are presented and an analysis of the angular decay correlations is also...
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Article
Test of QED in the reactionse + e −→e + e − ande + e −→μ + μ − at CMS energies from 9.4 to 31.6 GeV
We have measured Bhabha scattering at cms energies of 9.4, 13, 17, 22, 27.5, 30.0, and 31.6 GeV and the reactione + e -→μ + μ - at 9.4 GeV. The experiment covers spacelike momentum transfers up to −850 GeV2 and t...
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Article
Inclusive and semi-inclusive ϱ0 production in π+/π−/K +/pp interactions at 147 GeV/c
In an experiment with the 30-inch Hybrid Spectrometer at Fermilab we have obtained the inclusive and semi-inclusive production cross sections of the ϱ0 meson using a conventional background subtraction technique....
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Article
Experimental test of electroweak effects at PETRA energies
The differential cross sections for Bhabha scattering and μ pair production, and the total τ pair cross section as measured by the PLUTO detector at PETRA, have been analyzed to extract information on the weak...
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Article
Approach to scaling in inclusive π+/π− ratios at 147 GeV/c
The ratio of hadronic π+/π− production has been studied in the target fragmentation region of π+ p, π− p,K + p andp p collisions at 147 GeV/c beam momentum. The difference between this ratio in the π+ p and π− p ...
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Article
Hadron production inπ +,K + p andpp collisions at 147 GeV/c and properties of jet-like multiparticle systems
The gross features of the data are reviewed and the momentum tensor components, 〈S〉, and 〈T〉 are studied. Evidence for coplanarity effects is observed. A probabilistic method to search for jets is proposed. The j...
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Article
A study of elastic photoproduction of low massK + K − pairs from hydrogen in the energy range 2.8–4.8 GeV
The results of an experiment to study elasticK + K − photoproduction are presented. Differential cross sections and spin density matrix elements for ϕ(1.019) production are stddied as a function of incident photo...
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Article
Energy dependence of jet measures ine + e − annihilation
The jet character of the hadronic final states produced ine + e − annihilations is studied in terms of jet measures such as thrust, sphericity, jet opening angle and jet masses, in the energy range 7.7 to 31.6 Ge...
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Article
Measurement of the muon pair asymmetry ine + e − annihilation at \(\sqrt s = 34.7GeV\)
The reactione + e −→μ + μ − has been studied with the PLUTO detector at the c.m. energy of 34.7 GeV, based on an integrated luminosity of 46 pb−1. The total cross section agrees with QED predictions, and the corr...
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Article
The reactionspp→ppπ+π-,K + p→K + pπ +π−π, π+ p→ π+,pπ+π− and π− p →π+π− at 147 GeV/c
We have studied the reactionspp→ppπ+π-,K + p→K + pπ +π−π, π+ p→ π+,pπ+π− and π− p →π+π− at 147 GeV/c using the 30-inch Fermilab hybrid system. All four reactions were detected with the same apparatus and analyzed...
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Article
Energy moments for quark jets at PETRA
Measurements of energy moments for single quark jets at c.m. energies between 12 and 31.6 GeV are presented. The data, corrected for detector effects and initial state radiation, are compared to QCD prediction...
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Article
Planar events produced in hadron-proton collisions at 147 GeV/c and their jet-like structures
An analysis is presented of the production of jets in low-p t π ± p,k + p,pp collisions at 147 GeV/c collected at Fermilab in the rapid cycling hydrogen bubble chamber hybrid s...
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Article
Measruement of transverse momenta ine + e − annihilation jets at PETRA
Transverse particle momenta have been measured ine + e − annihilation into hadrons at c.m. energies between 9.4 and 31.6 GeV. The data are fully corrected for detector effects and radiation in the initial state. ...
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Article
A study of the reactions γp→ωp and γp→ωp and γp→ωΔ+
The differential and total corss sections and the decay density matrix elements have been measured for the reactions, γp→ωp and γp→ωΔ+ (1232) in the photon energy range 2.8 to 4.8 GeV. The total cross sections fo...
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Article
A measurement of theQ 2 andW dependence of the γγ total cross section for hadron production
A measurement of the γγ total cross section, σγγ(Q 2 W), is presented for theQ 2 range 0.1 to 100 GeV2, and for the massW of the hadronic final state between 1.5 and 10 GeV. The dependence of σγγ on bothQ 2 andW ...
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Article
TheQ 2 and transverse momentum dependence of jet production in photon-photon interactions
We present an experimental study of jetproduction in photon-photon interactions for 0.1≲Q 2≲120 GeV2 and jet transverse momentum,p T , up to 5 Ge...
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Article
Pion pair production in photon-photon interactions
The processγγπ+π− has been measured with complete particle identification. Cross-sections are presented from near threshold up to the region of thef(1270). In the mass range 0.5–0.7 GeV, crosssections are lower t...
