HEPData Search

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Observation of antihelium-3

Antipov, Yu.M. ; Denisov, S.P. ; Donskov, S.V. ; et al.

Nucl.Phys.B 31 (1971) 235-252, 1971.

Inspire Record 68563 DOI 10.17182/hepdata.41500

3 H̃e nuclei were observed in the negative beam, produced by 70 GeV protons on an Al target. Five 3 H̃e have been identified among 2.4 · 10 11 particles that passed through the apparatus. Scintillation and Čerenkov counters were used to measure the electrical charge and velocity of particles. The mass of 3 H̃e is found to be M 3 H ̃ e = (1.00 ± 0.03)3m p , the charge is z = (0.99 ± 0.03)2 e . The ratio of differential production cross sections of 3 H ̃ e (P = 20 GeV /c) and π − (P = 10 GeV/c ) equals 2 · 10 −11 . This corresponds to antihelium −3 production cross section d 2 σ 3 H ̃ e / d Ω d P = 2.0 · 10 −35 cm 2 / sr · GeV /c per Al nuclei and 2.2 · 10 −36 cm 2 sr · GeV/ c per nucleon.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Observation of antitritium

Vishnevsky, N.K. ; Grachev, M.I. ; Rykalin, V.I. ; et al.

Yad.Fiz. 20 (1974) 694-708, 1974.

Inspire Record 95006 DOI 10.17182/hepdata.18359

None

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Production of Sigma* (1385) and K* Resonances in pi- p Collisions at 4.35-GeV/c and 4.85-GeV/c Momenta

Aleshin, Yu.D. ; Arutyunyants, G.A. ; Kiselevich, I.L. ; et al.

Sov.J.Nucl.Phys. 24 (1976) 56, 1976.

Inspire Record 100360 DOI 10.17182/hepdata.45427

None

2 data tables

Table 1

No description provided.

Table 2

VARIOUS INCLUSIVE MEASUREMENTS.

Inclusive Production of rho0 and K* Resonances in p p Interactions at 69-GeV/c

The French-Soviet collaboration Ammosov, V.V. ; Derre, J. ; Ermolov, P.F. ; et al.

SACLAY-DPhPE 75-08, 1975.

Inspire Record 99996 DOI 10.17182/hepdata.43801

None

1 data table

Table 1

No description provided.

J/psi Particle Production by 70-GeV/c Protons

Antipov, Yu.M. ; Bessubov, V.A. ; Budanov, N.P. ; et al.

Phys.Lett.B 60 (1976) 309, 1976.

Inspire Record 100281 DOI 10.17182/hepdata.6524

Invariant mass spectrum of μ + μ − pairs produced by 70 GeV/ c protons in Be target are presented. Distinct enhancements in the mass regions of ϱ, ω mesons, φ meson and J/ψ particle are observed. For J/ψ production x and p ⊥ 2 distributions are given. The total cross section for the reaction p + Be → ( J ψ → μ + μ − ) + … is equal to 9.5 ± 2.5 nb/nucleus .

5 data tables

Table 1

No description provided.

Table 2

ASSUME B.R.(MU+MU-) = 0.069.

Table 3

ASSUME A**(2/3) DEPENDENCE FOR SIGMA.

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Neutral Strange Particle Production in p p Interactions at 69-GeV/c

Ammosov, V.V. ; Boratav, Murat ; Derre, J. ; et al.

Nucl.Phys.B 115 (1976) 269-286, 1976.

Inspire Record 101304 DOI 10.17182/hepdata.35578

From a study of 1226 neutral strange particles produced in pp interactions at 69 GeV/ c in the MIRABELLE hydrogen bubble chamber, we obtain the inclusive cross sections for K S 0 , Λ / Σ 0 , Λ / Σ 0 equal to 3.43 ± 0.23, 3.44 ± 0.2 and 0.16 ± 0.03 mb, respectively. The inclusive distributions are compared with corresponding data at other energies.

1 data table

Table 1

No description provided.

Single Particle Inclusive Spectra of Charged Particles in anti-p p Interactions at 22.4-GeV/c

The Alma Ata-Dubna-Helsinki-Kosice-Moscow-Prague collaboration Boos, E.G. ; Samoilov, V.V. ; Takibaev, Zh.S. ; et al.

Nucl.Phys.B 121 (1977) 381-392, 1977.

Inspire Record 109633 DOI 10.17182/hepdata.35465

The inclusive spectra for p p collisions at 22.4 GeV/ c are investigated. We show that the transverse momentum distributions resemble those in high-energy pp interactions and discuss the influence of annihilation processes on the p T 2 distributions. The invariant inclusive cross section for pions in the central region is found to be 28 ± 1 mb. A charge asymmetry is indicated by the y ∗ spectrum in the central region, the asymmetry parameter having the value 0.15 ± 0.01. Finally, we estimate the upper limit of the diffraction dissociation of the beam particle to be 3.68 −0.15 +0.45 mb.

10 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.