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.

Observation of Backward Production of Sigma- (1385) Resonance in Quasi Two Particle Reactions pi- p --> K+ (K+) Sigma*- (1385) 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) 519, 1976.

Inspire Record 109020 DOI 10.17182/hepdata.19078

None

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Determination of Nucleon and Pion Form-factors by Analyzing the $\pi^- p \to e^+ e^- \pi$ Reaction at E ($\pi$) = 164-{MeV}

Alizade, V.V. ; Berezhnev, S.F. ; Blokhintseva, T.D. ; et al.

Sov.J.Nucl.Phys. 33 (1981) 189, 1981.

Inspire Record 154897 DOI 10.17182/hepdata.39237

None

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

STUDY OF PROTON DIFFRACTIVE EXCITATION PROCESSES IN REACTION K+ p ---> K+ p pi+ pi- AT 32-GeV/c

The Soviet-CERN collaboration Chliapnikov, P.V. ; Falaleev, V.P. ; Garuchava, Z.Sh. ; et al.

Sov.J.Nucl.Phys. 38 (1983) 235, 1983.

Inspire Record 183145 DOI 10.17182/hepdata.41204

None

5 data tables

Table 1

No description provided.

Table 2

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Table 3

No description provided.

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DIFFRACTIVE PRODUCTION OF A NARROW BARYON IN NEUTRON CARBON INTERACTIONS

The BIS-2 collaboration Aleev, A.N. ; Arefev, V.A. ; Balandin, V.P. ; et al.

Dubna Jinr - 83-602 (83,REC.NOV.) 6p, 1983.

Inspire Record 196394 DOI 10.17182/hepdata.39600

None

6 data tables

Table 1

No description provided.

Table 2

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Table 3

No description provided.

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Observation and Study of a Narrow State in a $\Sigma^-$ (1385) $K^+$ System

The Berlin-Budapest-Dubna-Moscow-Prague-Sofiya-Tbilisi collaboration Aleev, A.N. ; Arefev, V.A. ; Balandin, V.P. ; et al.

Z.Phys.C 25 (1984) 205, 1984.

Inspire Record 201523 DOI 10.17182/hepdata.39601

New data on the observation and study of a narrow resonance decaying intoΣ−(1,385)K+ have been obtained. The mass of the resonance is (1,956−6+8) MeV/c2, and its width is (27±15) MeV/c2. The resonance is produced in the diffraction dissociation of neutrons on quasi-free nucleons of carbon nuclei. The slope parameter of the differential cross section inPT2 is (9.9±3.0) (GeV/c)−2. The cross section times the branching ratio is (0.22±0.04) μb per nucleon. The resonance has one of the natural spinparities: 5/2+, 7/2− and so on.

5 data tables

Table 1

YN IS IN ARBITRARY UNITS.

Table 2

Table 3

ARBITRARY UNITS FOR YN.