Understanding the interplay of the nuclear interaction with polarized protons and the electromagnetic interaction with polarized electrons in polarized atoms is crucial to progress towards the PAX goal to eventually produce stored polarized antiproton beams at FAIR. Presently, there exist two competing theoretical scenarios: one with substantial filtering of (anti)protons by atomic electrons, while the second one suggests a self-cancellation of the electron contribution to filtering. The issue can be clarified by studying the energy dependence of the polarization buildup in a proton beam at COSY at energies in the range from 20 to about 800 MeV. This Letter-of-Intent summarizes the physics case and possible experimental approaches to these studies at COSY.
Spin Filtering Studies at COSY
BARION, Luca;BERTELLI, Susanna;CARASSITI, Vittore;CIULLO, Giuseppe;CONTALBRIGO, Marco;COTTA RAMUSINO, Angelo;FERRETTI, Paola;DRAGO, Alessandro;GUIDOBONI, Greta;LENISA, Paolo;PAPPALARDO, Luciano Libero;STANCARI, Giulio;STANCARI, Michelle Dawn;STATERA, Marco;
2006
Abstract
Understanding the interplay of the nuclear interaction with polarized protons and the electromagnetic interaction with polarized electrons in polarized atoms is crucial to progress towards the PAX goal to eventually produce stored polarized antiproton beams at FAIR. Presently, there exist two competing theoretical scenarios: one with substantial filtering of (anti)protons by atomic electrons, while the second one suggests a self-cancellation of the electron contribution to filtering. The issue can be clarified by studying the energy dependence of the polarization buildup in a proton beam at COSY at energies in the range from 20 to about 800 MeV. This Letter-of-Intent summarizes the physics case and possible experimental approaches to these studies at COSY.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
