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STUDY OF DIFFRACTION DISSOCIATION AND DOUBLE RESONANCE PRODUCTION IN THE FINAL STATE ANTI-P P PI+ PI- AT 7.2-GEV/C

Van Apeldoorn, G.W. ; Harting, D. ; Holthuizen, D.J. ; et al.

Nucl.Phys.B 156 (1979) 111-125, 1979.

Inspire Record 146767 DOI 10.17182/hepdata.34665

On 8 K events of the reaction p p π + π − at 7.23 GeV/ c simple selection on angular parameters is performed yielding a sample of events with the typical features of diffraction dissociation. A cross section of 1.22 ± 0.08 mb (in two vertices) and a slope of the t distribution of 12.6 ± 1.0 GeV −2 for − t < 0.1 GeV 2 are obtained for the diffraction fraction dissociation p → p π + π − + c.c. Using an analogous selection procedure, another sample of events is isolated that is characterized by double resonance production. Cross sections for Δ Δ and Δ Δ ′ + c.c. production amount to 1.27 ± 0.09 mb and 0.23 ± 0.07 mb respectively. Diffraction dissociation and double resonance production together make up for 87% of the total cross section for the reaction p p → p p π + π − , which is 3.11 ± 0.13 mb.

3 data tables

Table 1

No description provided.

Table 2

EXPONENTIAL FIT TO D(SIG)/DT IN THREE REGIONS OF T. FOR EVENTS WITH M(P PI+) AND M(AP PI-) < 1.4 GEV.

Table 3

No description provided.

NEUTRAL PION PHOTOPRODUCTION AND PROTON COMPTON SCATTERING AT LARGE ANGLES

Shupe, M.A. ; Milburn, Richard H. ; Quinn, D.J. ; et al.

Phys.Rev.D 19 (1979) 1921-1930, 1979.

Inspire Record 145744 DOI 10.17182/hepdata.24315

The differential cross sections for γp→γp and γp→π0p have been measured for incident photon energies in the range of 2 to 6 GeV and for |t| ranging from 0.7 to 4.3 GeV2. This corresponds to a center-of-mass angle range of 45° to 128°. The energy dependence of the data is compared to that predicted by several parton models.

10 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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rivet Analysis
Total Cross-Section for Hadronic Production by e+ e- Annihilation in the Total Center-Of-Mass Energy Range 1.42-GeV - 3.09-GeV

Bacci, C. ; Baldini Celio, R. ; Battistoni, G. ; et al.

Phys.Lett.B 86 (1979) 234-238, 1979.

Inspire Record 141722 DOI 10.17182/hepdata.27311

We report experimental results on the cross section for the reaction e + e − → hadrons as a function of the total c.m. energy in the range W = 1.42–3.09 GeV. The results, combined with those already existing below the charm threshold, clearly indicate a structure for R ( W ) = α ( e + e − → hadrons)/ α ( e + e − → μ + μ − ) in that energy region.

2 data tables

Table 1

THE ENERGY RANGES OF THE NEW DATA AND THE PREVIOUS (REVISED) DATA OVERLAP BETWEEN 1.9 AND 2.0 GEV. RADIATIVE CORRECTIONS HAVE BEEN APPLIED TO ALL DATA. THIS CROSS SECTION EXCLUDES TWO-BODY FINAL STATES.

Table 2

AVERAGE CHARGED AND NEUTRAL MULTIPLICITY. QUOTED ERRORS ARE STATISTICAL ONLY.

Production of Hadrons at $p_T$ From 0.5-{GeV}/$c$ to 2.5-{GeV}/$c$ in Proton - Nucleus Collisions at 70-{GeV} Energy

Abramov, V.V. ; Alekseev, A.V. ; Baldin, B.Yu. ; et al.

Sov.J.Nucl.Phys. 31 (1980) 343, 1980.

Inspire Record 143799 DOI 10.17182/hepdata.18132

None

11 data tables

Table 1

PRELIMINARY DATA.

Table 2

PRELIMINARY DATA.

Table 3

No description provided.

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DEUTERON BREAKUP BY PIONS AT 438-MeV/c MOMENTUM

Dakhno, L.G. ; Kravtsov, A.V. ; Makarov, M.M. ; et al.

Sov.J.Nucl.Phys. 31 (1980) 328, 1980.

Inspire Record 143877 DOI 10.17182/hepdata.2719

None

56 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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ELASTIC pi- d SCATTERING AT 552-MeV/c MOMENTUM

Dakhno, L.G. ; Kravtsov, A.V. ; Makarov, M.M. ; et al.

Sov.J.Nucl.Phys. 31 (1980) 326, 1980.

Inspire Record 143874 DOI 10.17182/hepdata.18995

None

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

FROM LEGENDRE POLYNOMIAL FIT TO D(SIG)/DOMEGA, USING VALUE AT THETA = 0 DEG OBTAINED BY ADDITION OF THE PI+ P AND PI- P FORWARD SCATTERING AMPLITUDES GIVEN BY DISPERSION RELATIONS.