HEPData Search

Showing 10 of 39 results

Production of charged pions by 730-MeV protons from hydrogen and selected nuclei

Cochran, D.R.F. ; Dean, P.N. ; Gram, P.A.M. ; et al.

Phys.Rev.D 6 (1972) 3085-3116, 1972.

Inspire Record 73637 DOI 10.17182/hepdata.22253

An experiment was done in the external proton beam of the Berkeley 184-in. cyclotron to measure the production cross sections for pions from various target nuclei, from hydrogen to lead. The cross-section data are presented and the reaction mechanisms discussed. The hydrogen production appears to fit the one-pion-exchange model.

1 data table

Table 1

No description provided.

Production of Massive Muon Pairs by 300-GeV and 400-GeV Protons

Kluberg, L. ; Piroue, P.A. ; Sumner, Richard L. ; et al.

Phys.Rev.Lett. 37 (1976) 1451, 1976.

Inspire Record 4051 DOI 10.17182/hepdata.1201

We have observed muon pairs with effective masses in the range 7<~Mμμ<~11 GeV/c2 produced by 300- and 400-GeV protons incident on a Cu target at Fermilab. The production cross section per nucleon, dσdMμμ, for 400-GeV incident protons is found to fall from 1 × 10−36 cm2/(GeV/c2) at Mμμ=7.7 GeV/c2 to 2.7 × 10−38 cm2/(GeV/c2) at Mμμ=11.2 GeV/c2. We find that a significant fraction of the observed direct single muons come from high-mass dimuons.

12 data tables

Table 1

No description provided.

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Table 3

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Measurement of $\phi$ Production in Proton - Nucleus Collisions at 400-GeV/c

Akerlof, C.W. ; Alley, P. ; Bintinger, D. ; et al.

Phys.Rev.Lett. 39 (1977) 861, 1977.

Inspire Record 120734 DOI 10.17182/hepdata.20951

We have measured the invariant cross section for inclusive ϕ production in proton-nucleus collisions at 400 GeV/c near Feynman x=0. For transverse momenta in the range between 0.8 and 3.5 GeV/c the ratio of ϕ to π− rises from 1 to 7%. We also report on correlations with particles opposite the ϕ in the center-of-mass system as they relate to the Okubo-Zweig-Iizuka rule.

1 data table

Table 1

No description provided.

Comparison of p + A and Si + Au collisions at 14.6-GeV/c

The E802 collaboration Abbott, T. ; Akiba, Y. ; Beavis, D. ; et al.

Phys.Rev.Lett. 66 (1991) 1567-1570, 1991.

Inspire Record 331219 DOI 10.17182/hepdata.19913

The production of π±,K±,p has been measured in p+Be and p+Au collisions for comparison with central Si+Au collisions. The inverse slope parameters T0 obtained by an exponential fit to the invariant cross sections in transverse mass are found to be, T0p,K+,ππ∼140–160 MeV in p+A collisions, whereas in central Si+Au collisions, T0p,K+∼200–220 MeV >T0ππ∼140–160 MeV at midrapidity. The π± and K+ distributions are shifted backwards in p+Au compared with p+Be. A gradual increase of (dn/dy)K+ per projectile nucleon is observed from p+Be to p+Au to central Si+Au collisions, while pions show no significant increase.

5 data tables

Table 1

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Table 2

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Table 3

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Production of Hadrons at Large Transverse Momentum in 200-GeV, 300-GeV and 400-GeV p p and p n Collisions

Antreasyan, D. ; Cronin, J.W. ; Frisch, Henry J. ; et al.

Phys.Rev.D 19 (1979) 764-778, 1979.

Inspire Record 6860 DOI 10.17182/hepdata.24270

Measurements of the invariant cross section Ed3σd3p are presented for the production of hadrons (π, K, p, and p¯) at large transverse momentum (p⊥) by 200-, 300-, and 400-GeV protons incident on H2, D2, Be, Ti, and W targets. The measurements were made at a laboratory angle of 77 mrad, which corresponds to angles near 90° in the c.m. system of the incident proton and a single nucleon at rest. The range in p⊥ for the data is 0.77≤p⊥≤6.91 GeV/c, corresponding to values of the scaling variable x⊥=2p⊥s from 0.06 to 0.64. For p−p collisions, the pion cross sections can be represented in the region x⊥>35 by the form (1p⊥n)(1−x⊥)b, with n=8 and b=9. The ratio of π+ to π− production grows as a function of x⊥ to a value larger than 2 at x⊥≳0.5. The ratios of the production of K+ and protons to π+ and of K− and antiprotons to π− also scale with x⊥ for p−p collisions. The K±, p, and p¯ fitted values for n and b are given. Particle ratios are also presented for D2, Be, Ti, and W targets and the dependences on atomic weight (A) are discussed.

14 data tables

Table 1

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MEASUREMENT OF THE CROSS-SECTION d**2 sigma / d p d OMEGA IN THE REACTION p A ---> anti-p X AT 10-GeV/c PROTON MOMENTA IN Be, Al, Cu AND Au NUCLEI

Barabash, L.Z. ; Egorov, O.K. ; Kuzichev, V.F. ; et al.

ITEP-48-1980, 1980.

Inspire Record 154929 DOI 10.17182/hepdata.40389

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

BACKWARD EMITTED MESONS IN NUCLEAR REACTIONS WITH 400-GeV PROTONS

Nikiforov, N.A. ; Bayukov, Yu.D. ; Gazzaly, M. ; et al.

ITEP-37-1980, 1980.

Inspire Record 154214 DOI 10.17182/hepdata.40366

None

55 data tables

Table 1

Axis error includes +- 0.0/0.0 contribution (?////DUE TO UNACCURASY IN OUTGOING PARTICLES MOMENTUM).

Table 2

Axis error includes +- 0.0/0.0 contribution (?////DUE TO UNACCURASY IN OUTGOING PARTICLES MOMENTUM).

Table 3

Axis error includes +- 0.0/0.0 contribution (?////DUE TO UNACCURASY IN OUTGOING PARTICLES MOMENTUM).

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BACKWARD PRODUCTION OF PIONS AND KAONS IN THE INTERACTION OF 400-GEV PROTONS WITH NUCLEI

Nikiforov, N.A. ; Bayukov, Yu.D. ; Efremenko, V.I. ; et al.

Phys.Rev.C 22 (1980) 700-710, 1980.

Inspire Record 159453 DOI 10.17182/hepdata.10010

Measurements of the invariant cross sections for the reaction p(400 GeV)+(Li6, Be,C,Al,Cu,Ta)→(π±, K±)+X at laboratory angles from 70° to 160° are reported. Upper limits for p¯ production are given. Comparisons of the data are made using several scaling variables. NUCLEAR REACTIONS Inclusive cross section; 400 GeV incident protons; Li6, Be, C, Al, Cu, Ta targets; production of π, K, and p¯; lab angles 70° to 160°.

55 data tables

Table 1

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Table 2

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Table 3

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