HEPData Search

At the Bonn 500 MeV electron synchrotron the reaction γ+р=р+π0 has been studied for energies belowEγ=222 MeV using nuclear emulsions inside a low-pressure hydrogen gas target to detect the recoil protons. Angular distributions of the neutral pion were obtained for the energiesEγ=159, 180, 206 MeV (or, alternatively,Eγ=166, 195 MeV with a different grouping of tracks). In general they are in good agreement with other experimental data in the same energy region, and join also smoothly to recent measurements at higher energies. The agreement with recent theoretical approaches is fairly good in the coefficientsA andB of the expansion dσ/dΩ=A+B cos Ψ+C cos2 Ψ, but the theoretical values of the coefficientC are definitely too positive.

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

$\pi^+$ $\pi^-$ production in $e^+$ $e^-$ collisions and $\rho$-$\omega$ interference

Augustin, J.E. ; Benaksas, D. ; Buon, J. ; et al.

(1969) 35, 1969.

Inspire Record 58289 DOI 10.17182/hepdata.37427

None

1 data table

Table 1

RELATIVE PRODUCTION OF PION PAIRS WITHOUT RADIATIVE CORRECTIONS.

Contribution to the study of the interactions $\pi^{-}$p at 407 and 493 MeV : determination of cross sections of charged tracks, phase shift analysis in the elastic channel.

Derre, J. ;

PhD Thesis, Acad. Sci., Paris, 1969.

Inspire Record 1345881 DOI 10.17182/hepdata.39913

None

2 data tables

Table 1

Table 2

Evidence for dominance of pomeron like exchange in p + p ---> n + n + pi at 19 gev/c

Boggild, H. ; Hansen, K. ; Johnstad, H. ; et al.

Phys.Lett.B 30 (1969) 369-372, 1969.

Inspire Record 56657 DOI 10.17182/hepdata.28910

The reactions pp → NN π are studied at 19 GeV/ c and analysed in terms of the amplitudes with the low mass N π system in isospin states 1 2 and 3 2 respectively. The I − 1 2 cross section is compared with the corresponding one in π p→ ππ N at 8 GeV/ c .

1 data table

Table 1

'1'.

Polarization in elastic k-plus p scattering between 0.86 gev/c and 1.45 gev/c - results and phase-shift analysis

Andersson, S. ; Daum, C. ; Erne, F.C. ; et al.

Phys.Lett.B 30 (1969) 56-60, 1969.

Inspire Record 56694 DOI 10.17182/hepdata.28890

Polarization and differential cross-section data at 0.86, 0.97, 1.09, 1.37 and 1.45 GeV c are presented. An energy-independent phase-shift analysis from threshold up to 1.45 GeV c using random searches at 19 momenta and the shortest path method to link solutions at different momenta, yields three solutions. One of these is unlikely; the other two coincide up to 0.86 GeV c , and both show an anticlockwise half-circle in the P 3 -wave.

1 data table

Table 1

No description provided.

Date

Collaboration

Subject_areas

Phrases

Reactions

Observables

CM Energies (GeV)

Authors

Pi-minus + p ---> k-neutral + lambda/sigma-neutral associated production in the forward direction at 6,8,10 and 11.2 gev/c

The photoproduction of eta-mesons between 950 mev and 2.2 gev

Study of the charge exchange reaction pi-minus + p ---> pi-neutral + n with the pi-neutral meson backward emission at 1.55-3.8 gev/c

Pion-deuteron elastic differential cross-section at 994 mev/c

Neutron-proton elastic scattering from 3 to 10 gev

Photoproduction of neutral pions on protons near threshold

$\pi^+$ $\pi^-$ production in $e^+$ $e^-$ collisions and $\rho$-$\omega$ interference

Contribution to the study of the interactions $\pi^{-}$p at 407 and 493 MeV : determination of cross sections of charged tracks, phase shift analysis in the elastic channel.

Evidence for dominance of pomeron like exchange in p + p ---> n + n + pi at 19 gev/c

Polarization in elastic k-plus p scattering between 0.86 gev/c and 1.45 gev/c - results and phase-shift analysis