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Photoproduction of rho0 on hydrogen with tagged photons between 4 and 6 gev

Struczinski, W. ; Dittmann, P. ; Eckardt, V. ; et al.
Nucl.Phys.B 47 (1972) 436-444, 1972.
Inspire Record 84477 DOI 10.17182/hepdata.29528

We have measured the reaction γ p → p π + π − in the DESY 1 m Streamer Chamber. The dominant ϱ o production is analyzed in terms of various models.

6 data tables
Table 1

No description provided.

Table 2

FOR ALL EVENTS.

Table 3

FOR ALL TWO PION EVENTS.

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Photoproduction of two pions in the energy range of 4.1-GeV - 6.2-GeV

The Aachen-Hamburg-Heidelberg-Muenchen collaboration Struczinski, W. ; Dittmann, P. ; Eckardt, V. ; et al.
Nucl.Phys.B 57 (1973) 1-17, 1973.
Inspire Record 84071 DOI 10.17182/hepdata.32562

The reaction γp→; π + π − p in the energy range 4.1 to 6.2 GeV has been studied with a tagged photon beam incident on a liquid hydrogen target in the DESY one-meter streamer chamber. The reaction is analysed in terms of the longitudinal phase space (LPS) method. The one-pion-exchange model for Δ(1236) production and decay is examined. For the diffractive part of the LPS a dual model with pomeron exchange is investigated. In particular, the s -channel helicity conservation dual model of Dewey and Humpert describes the data well.

4 data tables
Table 1

No description provided.

Table 2

CORRECTED FOR LOSSES AT SMALL T (UNLIKE VALUES OF 'REF 1'). BACKGROUND SUBTRACTION ERROR HAS BEEN ADDED QUADRATICALLY TO THE STATISTICAL ERROR.

Table 3

No description provided.

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Backward Photoproduction of rho0 and f Between 2.8-GeV and 4.8-GeV

Clifft, R.W. ; Dainton, J.B. ; Gabathuler, E. ; et al.
Phys.Lett.B 64 (1976) 213-216, 1976.
Inspire Record 109693 DOI 10.17182/hepdata.27627

A measurement of backward photoproduction of charged pion pairs on protons is reported. The pion pair mass spectrum shows strong ϱ ° and f production. Data are presented on the u and s dependence for ϱ O and f, together with the decay polarisation for the ϱ O .

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

AVERAGED OVER U RANGE OF EXPERIMENT. NO EVIDENCE FOR ANY LARGE S-WAVE CONTRIBUTION TO THE PI PI SYSTEM IN THE RHO0 MASS REGION (RHO(0S) < -0.03 +- 0.13). U CHANNEL FRAME: Z AXIS IN INCIDENT PROTON DIRECTION IN THE DIPION REST FRAME.