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phi MESON INCLUSIVE PRODUCTION BY 70-GeV/c PROTONS

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

Phys.Lett.B 110 (1982) 326-328, 1982.

Inspire Record 166471 DOI 10.17182/hepdata.30975

Results of the experimental study of inclusive φ meson production off berillium nuclei by 70 GeV/ c protons in the beam fragmentation region x > 0.41 are presented. Fitting of the measured differential cross sections to the forms d σ d x ∼ (1 − x) n x and d σ d p 2 t ∼ exp (−bp 2 t ) gives the parameters n = 6.0 ± 1.7 and b = (2.4 ± 0.7) (GeV/ c ) −2 . In the framework of a quark-parton model the measured φ meson x -distribution suggests that in the region of x > 0.41 nearly 90% of the φ mesons are produced via a strange sea quark fusion. The ratio of the OZI-forbidden and OZI-allowed transition coupling constants has been found to be ten times smaller than the same ratio calculated from the partial decay widths. The total inclusive cross section is estimated to be σ (pN → φ X) = (0.7 ± 0.2) × 10 −27 cm 2 .

4 data tables

Table 1

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Table 2

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Inclusive $K^{+}$(1430), $K^{0}$(1430) and $F(1270)$ Production in $K^+ p$ Interactions at 32-{GeV}/$c$

Chliapnikov, P.V. ; Falaleev, V.P. ; Gerdyukov, L.N. ; et al.

Z.Phys.C 12 (1982) 113, 1982.

Inspire Record 167340 DOI 10.17182/hepdata.10914

Results are presented on total and semiinclusive cross sections, longitudinal and transverse momentum distributions of the tensor mesonsK*+(1430),K*0(1430), andf(1270) observed inK+p interactions at 32 GeV/c. The data are compared withK*+(892).K*0(896) and ϱ0 vector meson production in the same experiment. The shapes of inclusive invariantx-spectra for the strange vector and tensor mesons are found to be rather similar, after removal of diffractive and quasi-two-body channels, in agreement with quark-recombination ideas.

21 data tables

Table 1

MULT FOR THE TENSOR MESONS CALCULATED AS MULT=SIG(RES)/SIG(N<=8), WHERE SIG(N<=8) IS THE SUM OF TOPOLOGICAL CROSS SECTIONS WITH N <= 8.

Table 2

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Comparison of Strange Anti-baryon and Strange Meson Production in $K^+ p$ Interactions at 32-{GeV}/$c$

Chliapnikov, P.V. ; Gerdyukov, L.N. ; Khromova, G.N. ; et al.

Z.Phys.C 12 (1982) 99, 1982.

Inspire Record 167341 DOI 10.17182/hepdata.10880

New experimental results are presented on inclusive production properties of$\bar \Sigma ^{ *+ } $(1385) and$\bar \Sigma ^{ *+ } $(1385) inK+p interactions at 32 GeV/c. The analysis is based on significantly larger statistics than previously available. A comparison is also made of invariantx-distributions ofK0/$\bar K^0 $,$\bar \Lambda $ and$\bar \Xi ^ +$ and of$\bar \Sigma ^{ *\pm } $(1385) andK*+(892). These spectra exhibit regularities expected from the quark-recombination picture when it is assumed that the strange mesons and antibaryons are produced off the strange$\bar s$-valence-quark in the incidentK+ meson. Transverse momentum distributions are also presented forK*+(892) and$\bar \Sigma ^{ *\pm } $(1385) and found to be very similar. The results on strange antibaryon average multiplicities disagree strongly with a recent version of the additive quark model.

32 data tables

Table 1

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Production of Vector and Tensor Mesons in Proton Proton Collisions at $\sqrt{s}=52$.5-{GeV}

The Annecy(LAPP)-CERN-College de France-Dortmund-Heidelberg-Warsaw collaboration Drijard, D. ; Fischer, H.G. ; Geist, Walter M. ; et al.

Z.Phys.C 9 (1981) 293, 1981.

Inspire Record 164535 DOI 10.17182/hepdata.14085

Inclusive production of ϱ0,f, andg0 mesons and ofKs0,K*0 (892), ϕ andK*0(1430)mesons has been measured at <y>∼2.6 and <pT>∼1.1 GeV/c in proton-proton interactions at$\sqrt s= 52.5$ GeV. The negative particle from the two-body decays of these resonances were identified by a threshold Cerenkov counter and used for triggering. Starting from the measured differential cross section, total inclusive cross sections for the vector and tensor mesons were determined using various parametrizations for they andpT dependence of the differential cross section. The experimental results are discussed in the framework of production models based on the parton picture. The strangeness suppresion factor λ=(0.30±0.10) due toSU(3) symmetry breaking of the quark sea is derived.

1 data table

Table 1

No description provided.

Inclusive Production of $\gamma$, Neutral $K$, $\Lambda^0$ and $\bar{\Lambda}^0$ in $K^- p$ Interactions at 110-{GeV}/$c$

The Aachen-Berlin-CERN-Cracow-London-Vienna-Warsaw collaboration Wright, P.R.S. ; Bardadin-Otwinowska, M. ; Barnham, K.W.J. ; et al.

Nucl.Phys.B 189 (1981) 421-441, 1981.

Inspire Record 164129 DOI 10.17182/hepdata.34242

Results on inclusive production of γ,K n , Λ 0 and Λ 0 in K − p interactions at 110 GeV/ c are presented. Total cross sections, and differential cross sections in terms of Feynman x , rapidity and p T 2 are given. It is found that about 40% of K n 's are produced together with a strange particle pair, and that 80% of Λ 0 's are produced together with a K K pair. These Λ 0, 's are produced predominantly in the backward direction. Fits to the form (1−| x |) n to the x F distributions of K n and Λ 0 in the fragmentation regions are found to be in general agreement with quark counting rule predictions.

5 data tables

Table 1

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