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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.

Inclusive and Semiinclusive Reactions With Neutral Kaons in $K^- p$ Interactions at 32-{GeV}/$c$

The French-Soviet & CERN-Soviet collaborations Arestov, Yu.I. ; Borovikov, A.A. ; Bryukhanova, T.M. ; et al.

Z.Phys.C 7 (1980) 97-110, 1980.

Inspire Record 140528 DOI 10.17182/hepdata.1412

None

3 data tables

Table 1

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Table 2

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Table 3

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Study of $\rho^0$ and $\omega$ Meson Inclusive Production by 43-{GeV}/$c \pi^-$ Mesons Off Be Nuclei

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

Sov.J.Nucl.Phys. 32 (1980) 348, 1980.

Inspire Record 144637 DOI 10.17182/hepdata.11052

None

18 data tables

Table 1

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Table 2

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Table 3

PRESENTED IN PREPRINT ON FIG 3.

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STUDY OF THE LEADING PROTON SPECTRA IN EXPERIMENTS ON 6.8-GEV/C PROTON SCATTERING ON PROTONS AND C, AL, CU, SN, PB NUCLEI. (IN RUSSIAN)

Ableev, V.G. ; Bodyagin, V.A. ; Vorobev, G.G. ; et al.

Yad.Fiz. 32 (1980) 1351-1356, 1980.

Inspire Record 159804 DOI 10.17182/hepdata.18015

None

2 data tables

Table 1

No description provided.

Table 2

DATA ON THE SUM OF ELASTIC AND QUASIELASTIC CROSS SECTIONS.

Study of the Inclusive Reactions $K^- p \to p$ X at 32-{GeV}/$c$

The French-Soviet & CERN-Soviet collaborations Babintsev, V.V. ; Borovikov, A.A. ; Buschbeck, B. ; et al.

Nucl.Phys.B 183 (1981) 29-52, 1981.

Inspire Record 154721 DOI 10.17182/hepdata.7921

In a K − p experiment at 32 GeV/ c with a sensitivity of 6 ev/≈b the inclusive reaction K − p → p + X was studied in the kinematical region x < −0.3. Most of the protons in this region were identified by ionization. Correcting for losses of the very slow as well as of the fast protons in this region we obtained σ p ( x < −0.3) = 5.9 ± 0.2 mb. The double invariant differential cross sections of protons were analysed in terms of the variables x , p T 2 , and M 2 / s , t , and the contributions from separate peripheral mechanisms were analysed. A triple-Regge analysis was performed on the inclusive proton d 2 σ /d t d( M 2 / s ) distribution with | t | < 1.1 GeV 2 . The fit with an RRP term resulted in an effective trajectory for the exchanged reggeon lying somewhat lower than that for the leading meson trajectory. Inclusion in the fit of an additional ππp term showed that pion exchange is important in the triple-Regge region at small | t |.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Diffraction Dissociation in Proton Proton Collisions at {ISR} Energies

Armitage, J.C.M. ; Benz, P. ; Bobbink, G.J. ; et al.

Nucl.Phys.B 194 (1982) 365-372, 1982.

Inspire Record 164126 DOI 10.17182/hepdata.7553

Data are presented on the reaction pp → pX in the range of four-momentum transfer squared 0.04< − t <0.80 GeV 2 and of c.m. energy squared 550 < s < 3880 GeV 2 . Invariant cross sections are given as a function of M 2 / s , where M is the mass of the missing system X, and of t . The cross sections are shown to scale in the variable M 2 / s , for M 2 / s > 0.01. The total diffractive cross section integrated over t and M 2 / s up to M 2 / s =0.05 rises by approximately 15% from σ dif =6.5±0.2 mb at 550 GeV 2 to σ dif =7.5±0.3 mb at 3880 GeV 2 .

9 data tables

Table 1

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Table 3

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