Ferrando, A.
POL.RHO
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Study of rho0 Production in gamma d, gamma p and gamma n Reactions at 7.5-GeV/c Using Linearly Polarized Photon Beam

Alexander, G. ; Gandsman, J. ; Levy, A. ; et al.
Nucl.Phys.B 69 (1974) 445-453, 1974.
Inspire Record 94508 DOI 10.17182/hepdata.32344

The reaction γ d→d ππ , γ p→p ππ and γ n→n ππ were studied in the SLAC 82″ deuterium filled bubble chamber, exposed to a linearly polarized photon beam of 7.5 GeV. All three reactions are dominated by ϱ 0 production. The differential cross section has a slope of ∼6.5 GeV −2 for nucleon reactions and a slope of ∼27 GeV −2 for coherent deuteron reactions. The behaviour of the density matrix elements shows that ϱ production conserves s -channel c.m.s. helicity and is dominated by natural parity exchange.

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