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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.
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Submitted on : Tuesday, February 23, 1999 - 5:48:40 PM
Last modification on : Thursday, November 19, 2020 - 12:58:27 PM

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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. ⟨in2p3-00005085⟩

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