In a previous publication, measurements of the depolarization of a stored proton beam by interaction with a co-propagating unpolarized electron beam at low relative energy have been presented and an upper limit of about 3 ×107 b for the electron-proton spin-flip cross-section was determined. A refined analysis presented in this paper reduces the previous upper limit by a factor of three by the introduction of a new procedure that also makes use of non-identified particles.
New experimental upper limit of the electron–proton spin-flip cross-section
LENISA, Paolo;BARION, Luca;BERTELLI, Susanna;CARASSITI, Vittore;CIULLO, Giuseppe;CONTALBRIGO, Marco;FERRETTI, Paola;GUIDOBONI, Greta;PAPPALARDO, Luciano Libero;PESCE, Andrea;STATERA, Marco;
2014
Abstract
In a previous publication, measurements of the depolarization of a stored proton beam by interaction with a co-propagating unpolarized electron beam at low relative energy have been presented and an upper limit of about 3 ×107 b for the electron-proton spin-flip cross-section was determined. A refined analysis presented in this paper reduces the previous upper limit by a factor of three by the introduction of a new procedure that also makes use of non-identified particles.File in questo prodotto:
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