Contribution from S and P waves in pp annihilation at rest
- 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
DOIAbstract
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)
Add to ORKG