HEPData Search

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Multiplicity distribution in p n interaction at 400-GeV/c and its empirical regularity

Bhattacharjee, D.K. ; Cherian, P.J. ; Maity, D.K. ;

Phys.Rev.D 41 (1990) 9-12, 1990.

Inspire Record 299994 DOI 10.17182/hepdata.22897

Multiplicity distributions in pn interactions derived from 400-GeV/c pd data are presented along with other available pn data at and above 100 GeV/c. Charged multiplicities are seen to be negative-binomially distributed. Moments of distribution and different parameters of fit are evaluated and compared. The rise of the single-diffractive component in pn interactions from 100 to 400 GeV is observed to be compatible with that in pp interactions in the same energy range.

1 data table

Table 1

No description provided.

Analyzing power of inclusive production of pi+, pi-, and K0(S) by polarized protons at 13.3-GeV/c and 18.5-GeV/c

Bonner, B.E. ; Buchanan, J.A. ; Clement, J.M. ; et al.

Phys.Rev.D 41 (1990) 13-16, 1990.

Inspire Record 299995 DOI 10.17182/hepdata.23009

We have measured the analyzing power in π+, π−, and KS0 production by a polarized proton beam at 13.3 and 18.5 GeV/c. The data cover the central and the beam fragmentation region, in the transverse-momentum range up to 2 GeV/c. The results indicate that sizable effects are present at high xF and also persist into the hard-scattering region for KS0 and π+. A zero value of the analyzing power was observed for π− production.

13 data tables

Table 1

No description provided.

Table 2

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Table 3

No description provided.

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Nuclear Dependence of Dimuon Production at 800-GeV

Alde, D.M. ; Baer, H.W. ; Carey, T.A. ; et al.

Phys.Rev.Lett. 64 (1990) 2479-2482, 1990.

Inspire Record 303588 DOI 10.17182/hepdata.19997

A precise measurement of the atomic-mass dependence of dimuon production induced by 800-GeV protons is reported. Over 450 000 muon pairs with dimuon mass M≥4 GeV were recorded from targets of H2, C, Ca, Fe, and W. The ratio of dimuon yield per nucleon for nuclei versus H2, R=YA/Y2H, is sensitive to modifications of the antiquark sea in nuclei. No nuclear dependence of this ratio is observed over the range of target-quark momentum fraction 0.1<xt<0.3. For xt<0.1 the ratio is slightly less than unity for the heavy nuclei. These results are compared with predictions of models of the European Muon Collaboration effect.

10 data tables

Table 1

High Mass trigger data.

Table 2

Intermediate Mass trigger data.

Table 3

Low Mass trigger data.

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C-12 (Si-28, X) C-11 cross-section at 13.4-GeV/nucleon

Winger, J.A. ; Hill, J.C. ; Cumming, J.B. ; et al.

Phys.Rev.C 41 (1990) 2931-2932, 1990.

Inspire Record 306211 DOI 10.17182/hepdata.26178

The C12(28Si,X)11C cross section was measured for 13.4-GeV/nucleon Si28 ions. Beam intensities were determined with a two-element counter telescope, and the C11 activity induced in thin and thick plastic scintillator targets was assayed by internal scintillation counting. The cross section corrected to zero target thickness is 73.5±3.5 mb. This value is compared with similar measurements for relativistic projectiles at 1–2 GeV/nucleon.

1 data table

Table 1

No description provided.

Measurement of inclusive C-12 (e, p) cross-sections

Lourie, R.W. ; Weinstein, L.B. ;

Phys.Rev.C 42 (1990) 441-443, 1990.

Inspire Record 303940 DOI 10.17182/hepdata.26153

We present data on inclusive (e,p) scattering for electron beam energies of 460, 505, 647, 686, 698, and 800 MeV. Proton momentum spectra were obtained at fixed proton angles and for momenta from 300–1000 MeV/c. The data are compared to a popular parametrization that includes quasifree knockout, a quasideuteron mechanism, and pion production through the Δ.

6 data tables

Table 1

No description provided.

Table 2

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Table 3

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Multiplicities of secondaries in interactions of 1.8-GeV/nucleon Fe-56 nuclei with photoemulsion and the cascade evaporation model

Dudkin, V.E. ; Kovalev, E.E. ; Nefedov, N.A. ; et al.

Nucl.Phys.A 509 (1990) 783-799, 1990.

Inspire Record 302290 DOI 10.17182/hepdata.36888

A nuclear photographic emulsion method was used to study the charge-state, ionization, and angular characteristics of secondaries produced in inelastic interactions of 56 Fe nuclei at 1.8 GeV/nucleon with H, CNO, and AgBr nuclei. The data obtained are compared with the results of calculations made in terms of the Dubna version of the cascade evaporation model (DCM). The DCM has been shown to satisfactorily describe most of the interaction characteristics for two nuclei in the studied reactions. At the same time, quantitative differences are observed in some cases.

16 data tables

Table 1

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Table 2

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Table 3

NUCLECS IS CNO.