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Contribution from S and P waves in pp̄ annihilation at rest

✍ Scribed by G. Bendiscioli; V. Filippini; A. Fontana; P. Montagna; A. Rotondi; P. Salvini; A. Bertin; M. Bruschi; M. Capponi; S. De Castro; R. Dona'; D. Galli; B. Giacobbe; U. Marconi; I. Massa; M. Piccinini; N. Semprini Cesari; R. Spighi; S. Vecchi; V. Vagnoni; M. Villa; A. Vitale; A. Zoccoli; A. Bianconi; G. Bonomi; E. Lodi Rizzini; L. Venturelli; A. Zenoni; C. Cicalò; A. De Falco; A. Masoni; G. Puddu; S. Serci; G. Usai; O.E. Gorchakov; S.N. Prakhov; A.M. Rozhdestvensky; V.I. Tretyak; M. Poli; P. Gianotti; C. Guaraldo; A. Lanaro; V. Lucherini; C. Petrascu; A.E. Kudryavtsev; F. Balestra; M.P. Bussa; L. Busso; P. Cerello; O.Yu. Denisov; L. Ferrero; A. Grasso; A. Maggiora; A. Panzarasa; D. Panzieri; F. Tosello; E. Botta; T. Bressani; D. Calvo; S. Costa; D. D'Isep; A. Feliciello; A. Filippi; S. Marcello; N. Mirfakhrai; M. Agnello; F. Iazzi; B. Minetti; S. Tessaro

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
216 KB
Volume
686
Category
Article
ISSN
0375-9474

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✦ Synopsis

The annihilation frequencies of 19 pp annihilation reactions at rest obtained in different target densities are analysed in order to determine the values of the P -wave annihilation percentage at each target density and the average hadronic branching ratios from P -and S-states. Both the assumptions of linear dependence of the annihilation frequencies on the P -wave annihilation percentage of the protonium state and the approach with the enhancement factors of Batty are considered. Furthermore the cases of incompatible measurements are discussed.

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