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rivet Analysis
Measurement of the continuum of dimuons produced in high-energy proton - nucleus collisions

Ito, A.S. ; Fisk, R.J. ; Jostlein, H. ; et al.

Phys.Rev.D 23 (1981) 604-633, 1981.

Inspire Record 153009 DOI 10.17182/hepdata.24076

We report final results of a series of measurements of continuum dimuon production in proton-nucleus collisions at Fermilab. New results with 6 times more statistics are included. A full description of the apparatus and methods used in the analysis of this series of measurements is given. The sea quark distribution of the nucleon is determined within the context of Drell-Yan and quantum-chromodynamic description of dilepton production in hadron collisions.

11 data tables

Table 1

No description provided.

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Table 3

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Search for Direct Single Photon Production at Large p(T) in Proton Proton Collisions at s**(1/2) = 62.4-GeV

The CERN-Columbia-Oxford-Rockefeller & CCOR collaborations Angelis, A.L.S. ; Besch, H.J. ; Blumenfeld, Barry J. ; et al.

Phys.Lett.B 94 (1980) 106-112, 1980.

Inspire Record 153483 DOI 10.17182/hepdata.27178

As part of a study of large p T phenomena in photon-proton collisions at the CERN ISR, a search for direct single photon production has been performed. A statistical division of the data sample into the fraction consistent with single photon and the fraction due to multiphoton decays of neutral hadrons is accomplished by measuring the average conversion probability for the sample in a one radiation length thick converter. The fraction of the sample attributable to direct single photon production is 〈 γ /all〉 = 0.074 ± 0.012 for 6 GeV/ c < p T 10 GeV/ c , and 〈 γ /all〉 = 0.26 ± 0.04 for p T > 10 GeV/ c , with an additional systematic uncertainty of ±0.05 for both values.

1 data table

Table 1

No description provided.

Observation of the Upsilon''' at CESR

Finocchiaro, G. ; Giannini, G. ; Lee-Franzini, Juliet ; et al.

Phys.Rev.Lett. 45 (1980) 222, 1980.

Inspire Record 9427 DOI 10.17182/hepdata.20691

During an energy scan at the Cornell Electron Storage Ring, with use of the Columbia University-Stony Brook NaI detector, an enhancement in σ(e+e−→hadrons) is observed at center-of-mass energy ∼10.55 GeV. The mass and leptonic width of this state (ϒ′′′) suggest that it is the 4S13 bound state of the b quark and its antiquark. After applying to the data a cut in a (pseudo) thrust variable, the natural width is measured to be Γ=12.6±6.0 MeV, indicating that the ϒ′′′ is above the threshold for BB¯ production.

1 data table

Table 1

VISIBLE TOTAL HADRONIC CROSS SECTION FOR FIRST, THIRD AND FOURTH UPSILONS.

rivet Analysis
Measurement of the Charged Kaon Form-factor in the Energy Range 1.0-{GeV} to 1.4-{GeV}

Ivanov, P.M. ; Kurdadze, L.M. ; Lelchuk, M.Yu. ; et al.

Phys.Lett.B 107 (1981) 297-300, 1981.

Inspire Record 173076 DOI 10.17182/hepdata.31025

The cross section of the reaction e + e − → K + K − has been measured at the electron-positron storage ring VEPP-2M in the c.m. energy range 1.0–1.4 GeV. At energies above 1.15 GeV the experimental values of the charged kaon form factor considerably exceed the predictions of the simplest vector dominance model with ϱ, ω, ψ mesons.

1 data table

Table 1

No description provided.