The s dependence of the electromagnetic proton form factors in the time-like region has been determined from the threshold (s = 4Mp2) up to s = 4.2 GeV2. Data were collected in a dedicated experiment performed at the LEAR antiproton ring at CERN, increasing by one order of magnitude the available statistics. Total and differential cross section of the pp → e-e+ reaction have been measured. The electric and magnetic form factors are found to have comparable value. The observed form factor shows a clear steep s dependence close to the threshold. © 1994.
Determination of the electric and magnetic form factors of the proton in the time-like region
CALABRESE, Roberto;DALPIAZ, Pietro;FERRETTI, Paola;LUPPI, Eleonora;PETRUCCI, Ferruccio Carlo;SAVRIE', Mauro;
1994
Abstract
The s dependence of the electromagnetic proton form factors in the time-like region has been determined from the threshold (s = 4Mp2) up to s = 4.2 GeV2. Data were collected in a dedicated experiment performed at the LEAR antiproton ring at CERN, increasing by one order of magnitude the available statistics. Total and differential cross section of the pp → e-e+ reaction have been measured. The electric and magnetic form factors are found to have comparable value. The observed form factor shows a clear steep s dependence close to the threshold. © 1994.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
