Helicity asymmetry E in γp→π[sup +]n with FROST
| Autor: | Steffen Strauch, null CLAS Collaboration |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Physics
Photon Spectrometer media_common.quotation_subject 020206 networking & telecommunications Observable 02 engineering and technology Polarization (waves) Helicity Asymmetry Nuclear physics Baryon Pion 0202 electrical engineering electronic engineering information engineering 020201 artificial intelligence & image processing Nuclear Experiment media_common |
| Zdroj: | AIP Conference Proceedings. |
| ISSN: | 0094-243X |
| Popis: | The main objective of the FROST experiment at Jefferson Lab is the study of baryon resonances. The polarization observable E for the reaction gamma p to pi+n has been measured as part of this program. A circularly polarized tagged photon beam with energies from 0.35 to 2.35 GeV was incident on a longitudinally polarized frozen-spin butanol target. The final-state pions were detected with the CEBAF Large Acceptance Spectrometer. Preliminary polarization data agree fairly well with present SAID and MAID partial-wave analyses at low photon energies. In most of the covered energy range, however, significant deviations are observed. These discrepancies underline the crucial importance of polarization observables to further constrain these analyses. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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