Formula omitted] and [formula omitted] annihilation cross sections at very low energy

A Zenoni ,A Vitale ,A Lanaro ,S De Castro ,A Bianconi ,G Bonomi ,S Mauro ,F Balestra ,R A Ricci ,D Panzieri ,B Giacobbe ,M Capponi ,V.i Tretyak ,C Guaraldo ,M Poli ,E Botta ,A Rotondi ,D Calvo ,M Piccinini ,I Massa ,A Filippi ,O.e Gorchakov ,M Villa ,S Prakhov ,V Lucherini ,R Garfagnini ,A Panzarasa ,L Vannucci ,F Iazzi ,A Masoni ,S Serci ,S Costa ,G Bendiscioli ,D Galli ,À Zoccoli ,C Cicalò ,M Corradini ,U Marconi ,Nicola Semprini Cesari ,G Puddu ,P Cerello ,V Vagnoni ,M Agnello ,B Minetti ,О Денисов ,S Marcello ,M P Bussa ,R Donà ,P Gianotti ,A Grasso ,P Salvini ,L Busso ,C Petrascu ,A Fontana ,U Gastaldi ,T Bressani ,L Venturelli ,A.m Rozhdestvensky ,A Feliciello ,A Bertin ,P Montagna ,F D’isep ,N Mirfakhrai ,S Vecchi ,M Bruschi ,G L Usai ,F Tosello ,E Lodi Rizzini ,A Donzella ,R Spighi ,L Ferrero ,S Tessaro

doi:10.1016/s0370-2693(99)00890-4

Formula omitted] and [formula omitted] annihilation cross sections at very low energy

A Zenoni , A Vitale + Show 70 more

https://doi.org/10.1016/s0370-2693(99)00890-4

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Journal: Physics Letters B	Publication Date: Sep 1, 1999
Citations: 43

Affiliation: University of Bologna, University of Cagliari, University of Turin, University of Padua, University of Florence, Joint Institute for Nuclear Research, University of Pavia, University of Brescia, University of Trieste

#Annihilation Cross Sections #Total Annihilation Cross Sections + Show 8 more

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Abstract

The p ̄ D and p ̄ 4 He total annihilation cross sections have been measured with the Obelix apparatus at LEAR at, respectively, three and two values of the p ̄ incident momentum between 70 MeV/c and 36 MeV/c. The values of the p ̄ D annihilation cross section, at such low energies, are in agreement with a surprising result obtained in a recent low statistics measurement of the antiprotonic deuterium K α X-rays [M. Augsburger et al., Phys. Lett. B 461 (1999) 417] (see following article), concerning the unexpected narrow width of the antiprotonic deuterium 1s level.

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