Abstract
The polarization parameterP has been measured for elastic scattering on polarized protons, of π−, K− and ¯p at 40 GeV/c and of π+, K+ and p at 45 GeV/c. Four-momentum transfer ranges from −0·08 to −1·8 (GeV/c)2 for π−p, and from −0·08 to about −1sd0(GeV/c)2 for p, π+, K± and ¯p.
The angular distribution of the polarization in π−p exhibits the well known non sense double zero att=−0·6 (GeV/c)2. The K−p and ¯pp results are compatible with exchange degeneracy for ¦t¦r <0·5 (GeV/c)2. The energy dependence of the polarizationP(t) in π−p and in K+p above 10 GeV/c incident momentum is compatible with interference between Pomeron and Regge poles. On the contrary, the polarization in pp elastic scattering decreases faster than ordinary Regge model predictions. This result can be explained by interference between non flip and flip amplitudes of the Pomeron, leading to negative values for the polarization.
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Gaidot, A., Bruneton, C., Bystricky, J. et al. Polarization measurements in high energy elastic scattering of pions, kaons, protons and antiprotons on protons and comparison with regge phenomenology. Czech J Phys 26, 25–33 (1976). https://doi.org/10.1007/BF01595092
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DOI: https://doi.org/10.1007/BF01595092