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MEASUREMENT OF THE SPECTATOR PROTON YIELD AT 0 ANGLE IN THE DEUTERON STRIPPING REACTION ON CARBON AT 8.9-GeV/c. (IN RUSSIAN)

Ableev, V.g. ; Vorobev, G.g. ; Zaporozhets, S.a. ; et al.

Yad.Fiz. 37 (1983) 132-136, 1983.

Inspire Record 192436 DOI 10.17182/hepdata.38079

The invariant cross section of the reaction of deuteron stripping on carbon target has been measured at a deuteron momentum of 8.9 GeV/c. The cross section is obtained at a zero detection angle of the stripping proton: E/p2xd2σ/dpdΩ=(281+-9)xbxGeV/srx(GeV/c)3. This value is consistent with the one calculated in the framework of the Bertocci-Treleani model of deuteron fragmentation. When the method of Nissen-Meyer is used for orthogonalization of the wave functions of primary deuteron and the (np) system, resulting from its disintegration, a similar calculation gives the result, which is 1.4 times larger than the measured value. Distribution in the cosine of angle of proton yield at the fixed proton momentum p turned out to be near to isotropy one and distribution in p at the fixed cos theta has the maximum at p=50 MeV/c

3 data tables

Table 1

Table 2

Table 3

rivet Analysis
Measurement of the production rates of charged hadrons in e+ e- annihilation at the Z0

The OPAL collaboration Akers, R. ; Alexander, G. ; Allison, John ; et al.

Z.Phys.C 63 (1994) 181-196, 1994.

Inspire Record 372772 DOI 10.17182/hepdata.48259

The inclusive production rates of π±,K± andp$\bar p$ inZ0 decays have been measured with the OPAL detector at LEP. Using the energy loss measurement in the jet chamber, the momentum range up to the beam energy (45.6 GeV/c) has been covered. Differential cross sections and total particle yields are given. Comparisons of the inclusive momentum spectra and the total rates with predictions of the JETSET and the HERWIG Monte Carlo model are presented. The total single rates are found to be 17.05±0.43 π±, 2.42±0.13K± and 0.92±0.11p$\bar p$ per hadronic event. Predictions of JETSET for cross sections and total rates agree very well for π±; however, for momenta greater than 4 GeV/c,K± rates are underestimated and$\bar p$ rates are overestimated. Combined with data of other particle species there is evidence that the peak positions in the ξ=ln(1/xp) distributions show a different mass dependence for mesons and baryons. However, both JETSET and HERWIG Monte Carlo predictions agree with the observed data.

4 data tables

Table 1

Normalised momentum distribution for charged pion production.

Table 2

Normalised momentum distribution for charged kaon production.

Table 3

Normalised momentum distribution for proton / antiproton production.

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