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Polarization of cumulative protons in the reaction gamma A --> p X.

Avakian, R.O. ; Avetisian, A.E. ; Arestakesian, G.A. ; et al.

Sov.J.Nucl.Phys. 49 (1989) 292-294, 1989.

Inspire Record 284675 DOI 10.17182/hepdata.17336

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Anti-proton - Helium Annihilation Around 44-{MeV}/$c$

Balestra, F. ; Bossolasco, S. ; Bussa, M.P. ; et al.

Phys.Lett.B 230 (1989) 36-40, 1989.

Inspire Record 276657 DOI 10.17182/hepdata.49625

The p¯4He annihilation cross section averaged over the interval 40–50 MeV/ c has been measured using a streamer chamber in a magnetic field. The measured value is 1342±250 mb. It agrees with a behaviour like 1/ p of the annihilation cross section. Our result has been obtained at the lowest momentum achieved till now in measurements of antiproton annihilation in flight.

1 data table

Table 1

No description provided.

Evidence of Isospin Effects in Anti-proton - Nucleus Annihilation

Balestra, F. ; Bossolasco, S. ; Bussa, M.P. ; et al.

Nucl.Phys.A 491 (1989) 572-586, 1989.

Inspire Record 264049 DOI 10.17182/hepdata.37013

Antiproton- 3 He annihilation events at rest have been detected using a self-shunted streamer chamber. The ratio of the cross section for annihilation on neutrons and on protons has been measured (0.467 ± 0.035). It is compared with other results from annihilation on free nucleons, deuterium, 3 He and 4 He. The low value of the ratio seems to indicate a strong isospin dependence of the antinucleon-nucleon P-wave amplitude.

6 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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anti-p He-3 REACTION CROSS-SECTION AT 200-MeV/c

Balestra, F. ; Bossolasco, S. ; Bussa, M.P. ; et al.

Phys.Lett.B 215 (1988) 247-250, 1988.

Inspire Record 264048 DOI 10.17182/hepdata.29876

Inelastic p - 3 He events at 192.8 MeV/ c are detected with a self-shunted streamer chamber. The measured reaction cross section is 392±23.8mb. This result is briefly discussed and compared with other reaction cross sections for low-energy p with light nuclei.

2 data tables

Table 1

Charged prong multiplicity distribution in annihilation events.

Table 2

Measured inelastic cross section.

Anti-proton - Neon Annihilation at Rest and at 607-{MeV}/$c$

Balestra, F. ; Bossolasco, S. ; Bussa, M.P. ; et al.

Nucl.Phys.A 491 (1989) 541-571, 1989.

Inspire Record 263202 DOI 10.17182/hepdata.37004

The analysis is based upon p̄Ne annihilation events at rest and at 607 MeV/c detected with a self-shunted streamer chamber exposed to the LEAR beams. The main measured quantities are the following: charged-prong multiplicity, negative pion multiplicity; momentum, angular and rapidity distributions. General distributions are given as well as distributions as functions of charged prong multiplicity. A correlation is found between high multiplicity and depth of the annihilation point. The data are compared with recent theoretical analyses.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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SEARCH FOR STRANGE BARYONIUM STATES IN ANTI-P D INTERACTIONS AT 8.9-GEV/C

Shoemaker, G.H.N. ; Ko, W. ; Michael, W. ; et al.

Phys.Rev.D 37 (1988) 1120-1130, 1988.

Inspire Record 264272 DOI 10.17182/hepdata.23273

A search for SU(3) manifestly exotic Q2Q¯ 2 baryonium states in antiproton-deuterium interactions was carried out at the SLAC 40-in. hybrid bubble-chamber facility. The I=(3/2, S=1 channel, X−, produced in conjunction with a forward produced neutral antikaon was studied. Such X− states would decay into an antihyperon and a baryon. The fast forward K¯ 0 was detected in a three-view segmented calorimeter placed downstream of the bubble chamber and used as part of the trigger. Upper limits of 0.50–1.63 μb are reported for the X−→Λ¯nπ−, Σ¯ n−, Λ¯pπ−π−, Σ¯ π−−, Σ¯ π∓±π− exclusive channels based upon ≤13 events per channel.

1 data table

Table 1

95 pct confidence level upper limits.

ANTI-PROTON HE-4 ELASTIC SCATTERING AT 600-MEV/C. (IN RUSSIAN)

Batusov, Yu.A. ; Balestra, F. ; Barbieri, Riccardo ; et al.

DUBNA JINR - N7-88 (88,REC.FEB.89) 15-22, 1988.

Inspire Record 271237 DOI 10.17182/hepdata.9316

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

PRODUCTION OF NEUTRAL STRANGE PARTICLES IN ANTI-P HE-4 ANNIHILATION AT 600-MEV/C. (IN RUSSIAN)

Batusov, Yu.A. ; Balestra, F. ; Barbieri, Riccardo ; et al.

DUBNA JINR - N7-88 (88,REC.FEB.89) 23-31, 1988.

Inspire Record 271238 DOI 10.17182/hepdata.38297

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
EXCLUSIVE PRODUCTION OF PROTON - ANTI-PROTON PAIRS IN TWO PHOTON COLLISIONS AT PEP

The TPC/Two Gamma collaboration Aihara, H. ; Alston-Garnjost, M. ; Avery, R.E. ; et al.

Phys.Rev.D 36 (1987) 3506, 1987.

Inspire Record 246557 DOI 10.17182/hepdata.23356

We report cross sections for the process γγ→pp¯ at center-of-mass energies W from 2.0 to 2.8 GeV. These results have been extracted from measurements of e+e−→e+e−pp¯ at an overall center-of-mass energy of 29 GeV, using the TPC/Two-Gamma facility at the SLAC storage ring PEP. Cross sections for the untagged mode [both photons nearly real] are shown to lie well above QCD predictions. Results are also presented for the single-tagged mode [one photon in the range 0.16<Q2<1.6 (GeV/c)2].

3 data tables

Table 1

Data read from graph in preprint. Statistical errors only.

Table 2

Data read from graph. Statistical errors only.

Table 3

Data read from graph. Statistical errors only.