# Time-like observables: differential cross section and angular asymmetry

Abstract : Time-like electromagnetic form factors can be obtained from unpolarized measurements of the differential cross section in proton antiproton annihilation in a pair of leptons, as $\overline{p}$ + p ↔ e+ + e− , with the PANDA detector at FAIR. We study the sensitivity of such measurements and focus on observables such as the angular asymmetry and the ratio of electric to magnetic form factors. We also collect useful formulas and references for future simulations and studies.
Keywords :
Document type :
Reports

Cited literature [13 references]

http://hal.in2p3.fr/in2p3-00374971
Contributor : Dominique Marchand <>
Submitted on : Tuesday, May 12, 2009 - 2:57:04 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:18 PM
Long-term archiving on: : Wednesday, September 22, 2010 - 11:56:18 AM

### File

ipno_final_v2.pdf
Files produced by the author(s)

### Identifiers

• HAL Id : in2p3-00374971, version 2

### Citation

Dominique Marchand, Thierry Hennino, Ronald Kunne, Saro Ong, Béatrice Ramstein, et al.. Time-like observables: differential cross section and angular asymmetry. 2008, pp.36. ⟨in2p3-00374971v2⟩

Record views