| Główna > Contribution from S and P waves in pp annihilation at rest |
| Article | |
| Title | Contribution from S and P waves in pp annihilation at rest |
| Author(s) |
Bendiscioli, G ; Filippini, V ; Fontana, A ; Montagna, P ; Rotondi, A ; Salvini, P ; Bertin, A ; Bruschi, M ; Capponi, M ; De Castro, S ; Donà, R ; Galli, D ; Giacobbe, B ; Marconi, U ; Massa, I ; Piccinini, M ; Cesari, N S ; Spighi, R ; Vecchi, S ; Vagnoni, V M ; Villa, M ; Vitale, A ; Zoccoli, A ; Bianconi, A ; Bonomi, G ; Lodi-Rizzini, E ; Venturelli, L ; Zenoni, A ; Cicalò, C ; De Falco, A ; Masoni, A ; Puddu, G ; Serci, S ; Usai, G L ; Gorchakov, O E ; Prakhov, S N ; Rozhdestvensky, A M ; Tretyak, V I ; Poli, M ; Gianotti, P ; Guaraldo, C ; Lanaro, A ; Lucherini, V ; Petrascu, C ; Kudryavtsev, A E ; Balestra, F ; Bussa, M P ; Busso, L ; Cerello, P G ; Denisov, O Yu ; Ferrero, L ; Grasso, A ; Maggiora, A ; Panzarasa, A ; Panzieri, D ; Tosello, F ; Botta, E ; Bressani, Tullio ; Calvo, D ; Costa, S ; D'Isep, D ; Feliciello, A ; Filippi, A ; Marcello, S ; Mirfakhraee, N ; Agnello, M ; Iazzi, F ; Minetti, B ; Tessaro, S |
| Affiliation | (CERN) |
| Publication | 2001 |
| Imprint | 2001 |
| In: | Nucl. Phys. A 686 (2001) 317-40 |
| DOI | 10.1016/S0375-9474(00)00517-0 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LEAR ; PS201 |
| Abstract | 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 (1989) are considered. Furthermore the cases of incompatible measurements are discussed. (55 refs). |