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Extraction of proton form factors in the timelike region from unpolarized e(+)e(-)-> p(p)over-bar events

BIANCONI, Andrea;
2006-01-01
2006
Ateneo di appartenenza
PE2_2 Particle physics
sì
2-s2.0-33747086546
WOS:000240239300045
Sì, ma tipo non specificato
Inglese
Internazionale
74
034009
-
We have performed numerical simulations of the unpolarized e(+)e(-)-> pp process in kinematic conditions under discussion for a possible upgrade of the existing DAFNE facility. By fitting the cross section angular distribution with a typical Born expression, we can extract information on the ratio vertical bar G(E)/G(M)vertical bar of the proton electromagnetic form factors in the timelike region within a 5%-10% uncertainty. We have explored also non-Born contributions to the cross section by introducing a further component in the angular fit, which is related to two-photon exchange diagrams. We show that these corrections can be identified if larger than 5% of the Born contribution, and if relative phases of the complex form factors do not produce severe cancellations.
Enti pubb. di ricerca ital.
3
info:eu-repo/semantics/article
262
Bianconi, Andrea; B., Pasquini; M., Radici
1 Contributo su Rivista::1.1 Articolo in rivista
none
1.1 Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/36434
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