# Antiproton-proton low energy parameters from annihilation cross section data

Abstract : The recent experimental data obtained by the OBELIX group on total $\bar{p}p$ annihilation cross section are analysed; the low energy spin averaged parameters of the $\bar{p}p$ scattering amplitude (the imaginary parts of the S-wave scattering length and P-wave scattering volume) are extracted from the data. Their values are found to be equal to \$Im a_{sc} = - 0.69 \pm 0.01 (stat) results are in very good agreement with existing atomic data.
Keywords :
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00005085
Contributor : LPSC bibliotheque Connect in order to contact the contributor
Submitted on : Tuesday, February 23, 1999 - 5:48:40 PM
Last modification on : Thursday, March 3, 2022 - 11:14:31 AM

### Citation

J. Carbonell, K.V. Protasov, A. Zenoni. Antiproton-proton low energy parameters from annihilation cross section data. Physics Letters B, Elsevier, 1997, 397, pp.345-349. ⟨10.1016/S0370-2693(97)00190-1⟩. ⟨in2p3-00005085⟩

Record views