Helicity Asymmetry in gamma p -> pi+ n with FROST
Abstract
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.
- Authors:
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1038729
- Report Number(s):
- JLAB-PHY-11-1358; DOE/OR/23177-1731; arXiv:1108.3050
TRN: US1201976
- DOE Contract Number:
- AC05-06OR23177
- Resource Type:
- Conference
- Journal Name:
- AIP Conf. Proc.
- Additional Journal Information:
- Journal Volume: 1432; Conference: NSTAR 11, 17-20 May 2011, Newport News, VA
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYONS; BUTANOLS; ENERGY RANGE; FROST; HELICITY; PHOTON BEAMS; PHOTONS; PIONS; POLARIZATION
Citation Formats
Strauch, Steffen. Helicity Asymmetry in gamma p -> pi+ n with FROST. United States: N. p., 2012.
Web. doi:10.1063/1.3701231.
Strauch, Steffen. Helicity Asymmetry in gamma p -> pi+ n with FROST. United States. https://doi.org/10.1063/1.3701231
Strauch, Steffen. 2012.
"Helicity Asymmetry in gamma p -> pi+ n with FROST". United States. https://doi.org/10.1063/1.3701231. https://www.osti.gov/servlets/purl/1038729.
@article{osti_1038729,
title = {Helicity Asymmetry in gamma p -> pi+ n with FROST},
author = {Strauch, Steffen},
abstractNote = {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.},
doi = {10.1063/1.3701231},
url = {https://www.osti.gov/biblio/1038729},
journal = {AIP Conf. Proc.},
number = ,
volume = 1432,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2012},
month = {Sun Apr 01 00:00:00 EDT 2012}
}