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Differential cross-sections and analyzing powers for anti-p p ---> pi- pi+ and K- K+ from 360-MeV/c to 1550-MeV/c

Hasan, A. ; Bugg, D.V. ; Hall, J.R. ; et al.

Nucl.Phys.B 378 (1992) 3-51, 1992.

Inspire Record 339576 DOI 10.17182/hepdata.6880

Analysing powers and differential cross sections for p p → π − π + and p p → K − K + have been measured over the full angular range using a polarised target at LEAR at 20 beam momenta from 360 to 1550 MeV/ c . Discrepancies in the normalisation of earlier d σ/ d Ω data at low momenta are clarified. Above 1000 MeV/ c , A 0N results confirm values close to +1 over most of the angular range for both reactions, in excellent agreement with earlier data of lower statistics. Below 1000 MeV/ c , where the analysing power is measured for the first time, large variations of A 0N with energy and angle are present.

84 data tables

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>A Measurement of the $\bar{p} p \to \pi^+ \pi^-$ Reaction for 158-{MeV}/$c \le p(\bar{p}) \le$ 275-{MeV}/$c$

Bardin, G. ; Burgun, G. ; Calabrese, R. ; et al.

Phys.Lett.B 192 (1987) 471-474, 1987.

Inspire Record 246571 DOI 10.17182/hepdata.30155

A measurement of the total cross section for the reaction p p → π + π − has been performed for seven values of the incident momentum between 158 and 275 MeV/ c . The values obtained, if compared with previous results at higher momenta, agree with a 1/ß dependence. The differential cross section sssumed over the whole incident momentum range has also been measured and the result of a fit by Legendre polynomials is given.

3 data tables

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4*PI*LEG(L=0,P=4) = 1.07 +- 0.13 mb.