HEPData Search

The total cross section for γγ→hadrons was measured as a function of the invariant massW of the system (1.25 to 4.25 GeV) at thee+e−-collider VEPP-4 with the detector MD-1. For the first time the data were obtained by detecting both scattered leptons with almost zero emission angles. The mean squared four momentum transfer 〈q2〉 is −0.005 GeV2, the rmsW resolution is 100–250 MeV. The data on the mean charged multiplicity 〈nC〉 are well described by the function 〈nC〉=(1.62 ±0.37)+(1.83±0.45)·ln(W(GeV)). TheW dependence of the total cross section is consistent with the theoretical prediction σ(nb)=240+270/W(GeV).

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Formation of light fragments of oxygen nucleus in O-16 p interactions at momentum 3.1-A/GeV/c

Ameeva, B.U. ; Botvina, A.S. ; Buzdavina, N.A. ; et al.

JINR-P1-91-545, 1991.

Inspire Record 324204 DOI 10.17182/hepdata.38628

None

22 data tables

Table 1

No description provided.

Table 2

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Table 3

No description provided.

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Fragmentation of oxygen nuclei in interactions with hydrogen at momentum 3.1-A/GeV/c

Botvina, A.S. ; Wislicki, W. ; Gaitinov, A.Sh. ; et al.

JINR-P1-90-560, 1990.

Inspire Record 304453 DOI 10.17182/hepdata.38731

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

CENTRAL INTERACTIONS OF Ne-22 NUCLEI WITH HEAVY PHOTOEMULSION NUCLEI AT P(0) = 4.1/A-GeV/c

The Alma Ata-Bucharest-Gatchina:Dubna-Dushanbe-Yerevan-Zernograd- Kosice-Cracow-Leningrad-Moscow-Tashkent-Tbilisi-Ulan Bator collaboration Andreeva, N.P. ; Anzon, Z.V. ; Ameeva, B.U. ; et al.

JINR-P1-89-213, 1989.

Inspire Record 281512 DOI 10.17182/hepdata.38837

None

5 data tables

Table 1

NUCLEUS IS NUCLEAR PHOTOEMULSION. EVENT WITH A TOTAL CHARGE OF ALL SPECTATOR FRAGMENTS OF A PROJECTILE = 0.

Table 2

NUCLEUS IS NUCLEAR PHOTOEMULSION. EVENT WITH A TOTAL CHARGET OF ALL SPECTATOR FRAGMENTS OF A PROJECTILE = 1.

Table 3

NUCLEUS IS NUCLEAR PHOTOEMULSION.

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Multiplicity of Charged Particles in Interactions of Oxygen Nuclei With Hydrogen at 3.1-{GeV}/$c$ Momentum

The Alma Ata-Warsaw-Dubna-Tashkent-Tbilisi collaboration Glagolev, V.V. ; Lebedev, R.M. ; Pestova, G.D. ; et al.

Z.Phys.A 345 (1993) 413-424, 1993.

Inspire Record 281736 DOI 10.17182/hepdata.16558

Experimental data on multiplicities of secondary charged particles in interactions of oxygen nuclei in a hydrogen bubble chamber at the incident momentum of 3.1 A GeV/c are presented and discussed. Multiplicity correlations are studied in details and it is shown that the character of these correlations is strongly influenced by the electric charge and baryon number conservation. Topologies and probabilities of different channels of fragmentation are determined for projectile oxygen nuclei. It is established that channels with production of helium nuclei play an important role in the processes of multifragment break-up of oxygen nuclei. Comparison of the experimental data with predictions of the cascadefragmentation-evaporation model has shown that the model provide the qualitative description of the considerable amount of experimental observations.

3 data tables

Table 1

FRAGB-fragments of a primary nucleus with Z=2, 3, 4, 5, 6, 7, 8.

Table 2

No description provided.

Table 3

Events of the total disintegration of the projectile nucleus: fragments with Z=2, 3, 4, 5, 6, 7, 8 are absent.

Fragmentation of Ne-22 in Emulsion at 4.1-a/GeV/c

El-Naghy, A. ; Krasnov, S.A. ; Tolstov, K.D. ; et al.

J.Phys.G 14 (1988) 1125-1137, 1988.

Inspire Record 251875 DOI 10.17182/hepdata.39460

Charge distributions of projectile fragments produced in the interactions of 22Ne beams with emulsion at 4.1A GeV/c have been studied. Correlations between projectile and target fragments and among projectile fragments are presented. The change of charge yield distribution with the violence of the collision has been shown. The present analysis contradicts theoretical calculations describing the inclusive charge yield distribution of fragments by a single process.

4 data tables

Table 1

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