HEPData Search

The reaction π − p→ π 0 π 0 n has been measured with a 648 channel hodoscope spectrometer for the detection of the four γ's from the π 0 decays. The π 0 π 0 D-wave is fully compatible with the f 0 contribution as it is determined in high-statistics π + π − experiments. The magnitude of the π 0 π 0 S-wave and the cosinus of its phase angle (relative to the known D-wave) are determined from fits to the π 0 π 0 angular distributions. Argand diagrams for the I = 0 amplitude S 0 are given for the range 1000 to 1500 MeV/ c 2 . Two solutions exist. One exceeds the unitarity limit above 1200 MeV/ c 2 . The other remains within the unitarity limit and is nearly elastic up to 1450 MeV/ c 2 . It indicates an S 0 wave resonance around 1300 MeV/ c 2 .

2 data tables

Table 1

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Table 2

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STUDY OF DECAYS PHI ---> MU+ MU- AND PHI ---> PI+ PI-

Kurdadze, L.M. ; Lelchuk, M.Yu. ; Sidorov, V.A. ; et al.

Yad.Fiz. 35 (1982) 352-367, 1982.

Inspire Record 179830 DOI 10.17182/hepdata.17741

None

2 data tables

Table 1

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Table 2

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INVESTIGATION OF THE REACTION GAMMA P ---> DELTA++ PI- ON POLARIZED PROTONS. (IN RUSSIAN)

Belyaev, A.A. ; Getman, V.A. ; Gorbenko, V.G. ; et al.

Yad.Fiz. 35 (1982) 373-375, 1982.

Inspire Record 179828 DOI 10.17182/hepdata.17756

None

1 data table

Table 1

No description provided.

MEASUREMENT OF PI0 MESON PHOTOPRODUCTION CROSS-SECTION ON HE-4 AT THE ENERGIES E (gamma) = 1.5-GEV - 4.5-GEV IN REGION OF SMALL MOMENTUM TRANSFERS. (IN RUSSIAN)

Aleksanian, A.S. ; Asatiani, T.L. ; Vladimirsky, N.V. ; et al.

Yad.Fiz. 35 (1982) 368-372, 1982.

Inspire Record 179829 DOI 10.17182/hepdata.17761

None

1 data table

Table 1

No description provided.

Diffraction scattering of the 17.9 GeV/c alpha particles on hydrogen and helium nuclei

Ableev, V.G. ; Bodyagin, V.A. ; Vorobev, G.G. ; et al.

Yad.Fiz. 36 (1982) 1434-1441, 1982.

Inspire Record 186016 DOI 10.17182/hepdata.39685

The absolute differential cross sections for ap elastic scattering and for the sum of elastic and quasielastic aa scattering have been measured at a momentum of 17.9 GeV/c in the four-momentum transfer region (0.01 < | t | < 0.2) GeV2/c2 with normalization errors less than 3%. Such measurements in the energy region of a few GeV have been performed for the first time. The measurements have been carried out using the alpha particle beam with the intensity of (1-5)x105 particles/s extracted from the synchrophasotron during 0.3-0.5s. The cryogen target filled with hydrogen (0.847+-0.001 g/cm2) and helium was used. The substance amount along the particle path constituted 0.11 g/cm2 in an unfilled target. The total cross sections, diffraction cone slope parameters and total elastic cross sections for ap and aa scattering have been obtained. The results are compared with the calculations carried out in the frames of the Glauber-Sitenko diffraction multiple scattering theory. The deviation of the calculated differential cross sections from the experimental ones is observed. In the region of the diffraction cone the deviation has a different sign for ap and aa scattering and amounts to 10-15%

1 data table

Table 1

No description provided.