Gentile, T.
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Inclusive $\rho^0$ and F Production in $p p$ Interactions at 405-{GeV}/$c$

Suzuki, A. ; Kichimi, H. ; Cooper-Sarkar, Amanda M. ; et al.
Lett.Nuovo Cim. 24 (1979) 449, 1979.
Inspire Record 140494 DOI 10.17182/hepdata.37962

None

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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rivet Analysis
Cross-Sections and Event Topologies in e+ e- Annihilation at 13-GeV and 17-GeV Observed with the PLUTO Detector

The PLUTO collaboration Berger, Christoph ; Genzel, H. ; Grigull, R. ; et al.
Phys.Lett.B 81 (1979) 410-415, 1979.
Inspire Record 140294 DOI 10.17182/hepdata.45239

First results from the magnetic detector PLUTO at the new e + e − storage ring PETRA are shown. The ratio R of the cross section for hadron production to that for μ-pair production has been measured to be R = 5.0 ± 0.5 at 13 GeV and 4.3 ±0.5 at 17 GeV. Both values have an additional systematic error of 20%. The events show a typical 2-jet structure. The mean transverse momentum approaches a constant value with increasing energy implying a shrinkage of the jet opening angle.

2 data tables
Table 1

TAU HEAVY LEPTON PAIR CONTRIBUTIONS HAVE BEEN SUBTRACTED. R AT 13 AND 17 GEV, TOGETHER WITH SOME SELECTED LOWER ENERGY MEASUREMENTS FROM PLUTO AT DORIS.

Table 2

Data from earlier preprint DESY-79-06. NUMERICAL VALUES MEASURED OFF GRAPH IN PREPRINT.


Photoproduction of Neutral Pions in the Region of the Fourth Nucleon Resonance

Althoff, K.H. ; Gies, M. ; Kaul, O. ; et al.
Z.Phys.C 1 (1979) 257, 1979.
Inspire Record 140695 DOI 10.17182/hepdata.50276

We report the measurement of the differential cross section of the reaction γ +p→π0 +p at a photon energy of 1.4 GeV and pion c.m. angles between 60 and 175 degrees. The angular distribution confirms the simple quark model prediction of a pure magnetic excitation of theF37 (1950) resonance.

1 data table
Table 1

No description provided.


Measurement of the Relative Total Hadronic Cross-section R at {PETRA}

The Aachen-DESY-Annecy(LAPP)-MIT-NIKHEF-Beijing collaboration Barber, D. ; Becker, U. ; Boehm, A. ; et al.
Phys.Rev.Lett. 42 (1979) 1113, 1979.
Inspire Record 140059 DOI 10.17182/hepdata.3235

We report the first measurement of the ratio R=(σe+e−→hadrons)(σe+e−→μ+μ−) (with negligible τ-lepton contribution) at a center-of-mass energy s=13 GeV and s=17 GeV, from the just finished electron-positron colliding-beam facility PETRA. The detector, MARK-J, has an approximately 4π solid angle and measures γ, e, μ, and charged and neutral hadrons simultaneously. Our results yield R(s=17 GeV)=4.9±0.6 (statistical) ±0.7 (systematic error), and R(s=13 GeV)=4.6±0.5 (statistical) ±0.7 (systematic error). The ratio R(s=17 GeV)R(s=13 GeV) is 1.08±0.18.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


CROSS-SECTION AND POLARIZATION MEASUREMENTS OF P HE-4 ELASTIC SCATTERING AT GEV ENERGIES

Courant, H. ; Einsweiler, K. ; Joyce, T. ; et al.
Phys.Rev.C 19 (1979) 104-119, 1979.
Inspire Record 145405 DOI 10.17182/hepdata.26364

We have measured the differential cross-section and the analyzing power (polarization) for p-He4 elastic scattering at incident kinetic energies of 0.56, 0.80, 1.03, 1.24, and 1.73 GeV. The experiment used a polarized proton beam incident on a liquid helium target and a single arm magnetic spectrometer to detect elastic scattering. Both the differential cross sections and the analyzing power show structure near −t=0.25 (GeV/c)2 which decreases in magnitude with increasing energy. Both multiple scattering and optical model interpretations of the data are discussed. NUCLEAR REACTIONS elastic scattering, p-He4; GeV energies; measured differential cross section; measured polarization; comparison with theory.

10 data tables
Table 1

No description provided.

Table 2

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Table 3

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Polarization Measurements in π p+ p and K p+ p elastic scattering at 6 and 12 GeV/ c with the CERN polarized deuteron target

Fujisaki, M. ; Babou, M. ; Bystricky, J. ; et al.
Nucl.Phys.B 151 (1979) 206-212, 1979.
Inspire Record 145595 DOI 10.17182/hepdata.34795

The polarization in π + p → π + p and K + p → K + p has been measured at 6 and 12 GeV/ c in the four-momentum transfer interval 0.1 ⩽ | t | ⩽ 2.0 (GeV/ c ) 2 by scattering on protons of a polarized deuteron target. Comparison with existing results obtained with polarized proton targets shows good general agreement and no evidence for asymmetry effects due to the presence of the spectator neutron. For K + p elastic scattering polarization the experiment yields improved statistics, especially at 6 GeV/ c

4 data tables
Table 1

No description provided.

Table 2

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Table 3

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NEUTRON DISSOCIATION INTO P PI- AT 19-GEV/C

Bakken, V. ; Jacobsen, T. ; Gennow, H. ; et al.
Nuovo Cim.A 49 (1979) 465-483, 1979.
Inspire Record 145707 DOI 10.17182/hepdata.37532

The reaction pn→ppπ at 19 GeV/c is studied. It is dominated by the process where the neutron dissociates into the pπ- system and exhibits the characteristic features of diffraction dissociation. The pπ- mass distribution shows a strong peak at 1.3 GeV but is otherwise rather structureless. By comparison with other experiments we find that this peak is neither seen at higher nor at lower energies. The reason why it is not seen in experiments at higher energies seems to be that they suffer from strong experimental limitations. The 1.3 GeV peak is connected with small momentum transfers and an analysis of the moments of the decay angular distributions shows that this peak is a low-spin phenomenon. For larger momentum transfers the lowest moments show an onset already at threshold. By comparison with a pion exchange Deck model we find a substantial baryon exchange contribution for small momentum transfers. This contribution seems to become more pronounced at higher energies.

1 data table
Table 1

CORRECTED FOR UNOBSERVED DECAY MODES.


EXPERIMENTAL STUDY OF THE REACTION neutrino N ---> MU- P

The GARGAMELLE NEUTRINO PROPANE collaboration Pohl, M. ; Dewit, M. ; Haidt, D. ; et al.
Lett.Nuovo Cim. 26 (1979) 332-336, 1979.
Inspire Record 144819 DOI 10.17182/hepdata.37737

None

1 data table
Table 1

Measured Quasi-Elastic total cross section.


RESULTS FROM DASP ON E+ E- ANNIHILATION BETWEEN 3.1-GEV AND 5.2-GEV

The DASP collaboration Brandelik, R. ; Braunschweig, W. ; Martyn, H.U. ; et al.
Z.Phys.C 1 (1979) 233-256, 1979.
Inspire Record 145403 DOI 10.17182/hepdata.16476

This paper summarizes the measurements one+e− annihilation performed by the DASP Collaboration in the energy range between 3.1 and 5.2 GeV. The following topics are covered: total cross section, production and two body decays of the narrow resonances, radiative decays of theJ/ψ and ψ′ resonances and evidence for theX(2.82), ψ′ cascade decays, inclusive η production and evidence for theF meson, semileptonic decays of charmed mesons and properties of the heavy lepton.

5 data tables
Table 1

THESE DATA ON R WERE PUBLISHED IN R. BRANDELIK ET AL., PL 76B, 361 (1978), THE RECORD OF WHICH HAS TABULATED CROSS SECTIONS WITH AND WITHOUT THE TAU HEAVY LEPTON CONTRIBUTION.

Table 2

OBSERVATION OF J/PSI RESONANCE.

Table 3

OBSERVATION OF PSI(3700)0 RESONANCE.

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SMALL ANGLE ELASTIC HE D SCATTERING AT 9.0-GEV/C AND 19.8-GEV/C. (IN RUSSIAN)

Avdeichikov, V.V. ; Beznogikh, G.G. ; Budilov, V.A. ; et al.
Yad.Fiz. 30 (1979) 610-617, 1979.
Inspire Record 147556 DOI 10.17182/hepdata.18168

None

2 data tables
Table 1

X ERROR D(-T)/(-T) = 2.0000 PCT.

Table 2

X ERROR D(-T)/(-T) = 2.0000 PCT.