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Cross-Section Asymmetry of eta Mesons Photoproduction by Polarized Photons in the Resonance Region

Abramian, L.O. ; Avakian, R.O. ; Aganyants, Aleksandr O. ; et al.

Pisma Zh.Eksp.Teor.Fiz. 25 (1977) 597-600, 1977.

Inspire Record 124683 DOI 10.17182/hepdata.39787

None

1 data table

Table 1

No description provided.

Neutral Pion Production in $K^+ p$ Interactions at 32-{GeV}

The French-Soviet & CERN-Soviet collaborations Azhinenko, I.V. ; Belokopytov, Yu.A. ; Borovikov, A.A. ; et al.

Nucl.Phys.B 162 (1980) 61-78, 1980.

Inspire Record 131232 DOI 10.17182/hepdata.8076

Inclusive and semi-inclusive distributions of γ's and π 0 's in the reactions K + p → γ + X and K + p → π 0 + X at 32 GeV/ c are presented and discussed. When compared to the inclusive π − production, the π 0 cross section is found to be significantly higher in low | x | and p T regions. The data are compared with other experiments and quark fusion model predictions.

7 data tables

Table 1

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Table 3

ESTIMATED FROM GAMMA AND 2GAMMA SPECTRA.

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CROSS-SECTION OF pi- MESON CHARGED EXCHANGE REACTION ON NUCLEI AT 40-GeV/c MOMENTUM

Apokin, V.D. ; Vasiliev, A.N. ; Vishnevsky, N.K. ; et al.

Sov.J.Nucl.Phys. 35 (1982) 219, 1982.

Inspire Record 165494 DOI 10.17182/hepdata.41301

None

4 data tables

Table 1

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Table 2

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Table 3

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Measurement of differential cross sections for charge exchange of $\pi^{-}$ mesons in carbon at 40 GeV/c

Apokin, V.D. ; Vasiliev, A.N. ; Matulenko, Yu.A. ; et al.

Sov.J.Nucl.Phys. 36 (1982) 694-697, 1982.

Inspire Record 178549 DOI 10.17182/hepdata.10721

None

4 data tables

Table 1

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Table 2

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OBSERVATION OF POLARIZATION IN REACTION pi- p ---> eta n AT 40-GeV/c

Apokin, V.D. ; Avvakumov, I.A. ; Borisov, N.S. ; et al.

BNL Spin Sympos.1982:118, 1982.

Inspire Record 178780 DOI 10.17182/hepdata.41130

None

1 data table

Table 1

No description provided.

Relative Yields of $\eta$ Mesons Produced by 10-{GeV} Pions and Kaons

Akimenko, S.A. ; Belousov, V.I. ; Blik, A.M. ; et al.

Yad.Fiz. 43 (1986) 615-618, 1986.

Inspire Record 214473 DOI 10.17182/hepdata.40943

None

1 data table

Table 1

No description provided.

Polarization Parameters in the Reactions $\pi^- p$ (Polarized) $\to \eta n$ and $\pi^- p$ (Polarized) $\to \eta^\prime n$ at 40-{GeV}/$c$

Apokin, V.D. ; Arestov, Yu.I. ; Avvakumov, I.A. ; et al.

Z.Phys.C 35 (1987) 173, 1987.

Inspire Record 222760 DOI 10.17182/hepdata.40802

The polarization parameter in the reactions π−p→ηn and π−p→η′n at 40 GeV/c with −t ranging from 0 to 2.6 (GeV/c)2 and 1.0 (GeV/c)2, respectively, was measured in experiments using a propanediol polarized target. Only gamma particles from the neutral meson decay were detected. The polarization parameter of the first reaction turns out to be negative in a widet interval (0.05<−t<1.6 (GeV/c)2) and probably changes its sign at larger values oft. The average value of the polarization parameter of the second reaction is equal to −17±8)% in the region 0.05<−t<0.5 (GeV/c)2.

3 data tables

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A-dependence of $\eta$ Meson Inclusive Production at 10.5-{GeV}/$c$

Bitsadze, G.S. ; Budagov, Yu.A. ; Chirikov-Zorin, I.E. ; et al.

Nucl.Phys.B 279 (1987) 770, 1987.

Inspire Record 231123 DOI 10.17182/hepdata.39482

The experimental results are presented for ratios of ν-meson inclusive differential cross sections in 10.5 GeV/ c π + p, π + D and π + A collisions, R D/p =(d σ /d x F )( π + D → η X)/ (d σ /d x F ) π + p→ η X), R A =(d σ /d x F )( π + D→ η X) in the beam fragmentation region. The results are based on the statistics of ≈ 5 × 10 4 detected η → 2 γ decays. It is shown that the power α in the parametrisation R A ≈ A α ( xf ) does not change significantly with x F and its mean value is 0.50±0.02. The lower limit is obtained for the effective coefficient with string tension in the colour string model, κ ⩾ 3 GeV/fm. The observed growth of R A with x F can be explained by an assumption of a neutron halo with the factor H ≈ 4 in the nuclei.

5 data tables

Table 1

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Table 3

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