HEPData Search

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Strangeness production in anti-proton annihilation at rest on He-3, He-4 and Ne-20

Balestra, F. ; Batusov, Yu.A. ; Bendiscioli, G. ; et al.

Nucl.Phys.A 526 (1991) 415-452, 1991.

Inspire Record 320088 DOI 10.17182/hepdata.36782

New data are reported on antiproton annihilations at rest with production of Λ and K s 0 , using a streamer chamber with 3 He, 4 He and 20 Ne as gas targets. The data include Λ, K s 0 , ΛK s 0 and K s 0 K S 0 production rates and momentum distributions, π − momentum spectra, mean numbers of charged particles generally and of negatively charged particles separately for different reaction channels. The yields are compared to simple combinatorial calculations based on the extreme assumptions of Λ production via B = 1 or via B = 0 ( K ̄ rescattering) annihilations. Λ and K s 0 momentum spectra are compared to simple model calculations where B = 0 and B = 1 annihilations with and without final-state interactions are considered. A review of existing data on Λ and K s 0 production is presented, showing the dependence on the p ̄ momentum and on the mass number of the target.

6 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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First Results for the Two Spin Parameter $A_{LL}$ in $\pi^0$ Production by 200-GeV Polarized Protons and Antiprotons

The E581 & E704 collaborations Adams, D.L. ; Akchurin, N. ; Belikov, N.I. ; et al.

Phys.Lett.B 261 (1991) 197-200, 1991.

Inspire Record 314233 DOI 10.17182/hepdata.29385

The two-spin parameter A LL in inclusive π 0 productionby longitudinally-polarized protons and antiprotons on a longitudinally-polarized proton target has been measured at the 200 GeV Fermilab spin physics facility, for π 0 's at x F =0 with 1⩽ p t ⩽3 GeV/ c . The results exclude, at the 95% confidence level, values of A LL (pp) > 0.1 and < − 0.1 for π 0 's produced by protons, and values of A LL ( p p) > 0.1 and < −0.2 for incident antiprotons. The relevance of A LL (pp) for the gluon spin density is discussed. The data are in good agreement with “conventional”, small or zero, gluon polarization.

1 data table

Table 1

No description provided.

Study of fast p, anti-p yields in pi- Be interaction at 40-GeV/c with cumulative particle production

Antipov, Yu.M. ; Batarin, V.A. ; Bezzubov, V.A. ; et al.

IFVE-90-171, 1990.

Inspire Record 304399 DOI 10.17182/hepdata.40709

None

13 data tables

Table 1

CHARGED IS CUMULATIVE PI+-, OR K+-, OR P+-.

Table 2

CHARGED IS CUMULATIVE PI+-, OR K+-, OR P+-.

Table 3

No description provided.

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Experimental study of the annihilation of anti-protons at rest in nuclear photoemulsion and the optical cascade approach

Batusov, Yu.A. ; Bunyatov, S.A. ; Falomkin, I.V. ; et al.

JINR-E1-90-486, 1990.

Inspire Record 303148 DOI 10.17182/hepdata.39437

None

1 data table

Table 1

ANTIPROTONS STOPPING IN THE PHOTOEMULSION.

Elastic scattering of antiprotons by He-4 at 600-MeV/c.

Batusov, Yu.A. ; Bunyatov, S.A. ; Falomkin, I.V. ; et al.

Sov.J.Nucl.Phys. 52 (1990) 776-781, 1990.

Inspire Record 299081 DOI 10.17182/hepdata.47306

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Inclusive cross-section of cumulative proton production in pi- (K-, anti-p) Be, Al, Cu, Pb interactions at 40-GeV/c

Antipov, Yu.M. ; Batarin, V.A. ; Bezzubov, V.A. ; et al.

IFVE-90-51, 1990.

Inspire Record 298329 DOI 10.17182/hepdata.40708

None

15 data tables

Table 1

RUN 1.

Table 2

RUN 1.

Table 3

RUN 1.

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Inclusive production of K*0(892) mesons in K+ A interactions at 11.2-GeV.

Akimenko, S.A. ; Belousov, V.I. ; Kolosov, V.N. ; et al.

Sov.J.Nucl.Phys. 52 (1990) 884-889, 1990.

Inspire Record 296925 DOI 10.17182/hepdata.40693

None

15 data tables

Table 1

No description provided.

Table 2

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Table 3

No description provided.

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Observation of significant spin effects in hard collisions at 40-GeV/c

Apokin, V.D. ; Arestov, Yu.I. ; Astafev, O.V. ; et al.

Phys.Lett.B 243 (1990) 461-464, 1990.

Inspire Record 303587 DOI 10.17182/hepdata.29694

A single-spin asymmetry in the inclusive π 0 production at small x F was measured. In the experiment 40 GeV/c π − mesons were incident on transversely polarized protons and deutrons. An asymmetry of (40–50)% has been revealed in the hard scattering region.

1 data table

Table 1

No description provided.