STI Publications - View Publication Form #13816
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Publication Information
| Title | Polarization Transfer in Wide-Angle Compton Scattering and Single-Pion Photoproduction from the Proton | ||||
| Abstract | Wide-angle exclusive Compton scattering and single-pion photoproduction from the proton have been investigated via measurement of the polarization transfer from a circularly polarized photon beam to the recoil proton. The WACS polarization transfer was analyzed at an incident photon energy of 3.7 GeV at a proton scattering angle of theta_cm = 70deg. The longitudinal transfer K_LL , measured to be 0.645 ± 0.059 ± 0.048, where the first error is statistical and the second is systematic, has the same sign as predicted for the reaction mechanism in which the photon interacts with a single quark carrying the spin of the proton. However, the observed value is 3 times larger than predicted by the GPD-based calculations, which indicates a significant unknown contribution to the scattering amplitude. | ||||
| Author(s) | Bogdan Wojtsekhowski, Cristiano Fanelli, Evaristo Cisbani, David Hamilton, Giovanni Salme, Abdellah Ahmidouch, John Annand, Hovhannes Baghdasaryan, Joe Beaufait, Peter Bosted, Ed Brash, Cornel Butuceanu, Phil Carter, Eric Christy, Eugene Chudakov, Sam Danagoulian, Donal Day, Pavel Degtiarenko, Rolf Ent, Howard Fenker, Mike Fowler, Emil Frlez, Dave Gaskell, Ronald Gilman, Tanja Horn, Garth Huber, Kees De Jager, Eric Jensen, Mark Kevin Jones, Aidan Kelleher, Cynthia (Thia) Keppel, Mahbub Khandaker, M. Kohl, Gerfried Kumbartzki, Steven Lassiter, Ya Li, Richard Lindgren, Henry Lovelace, Wei Luo, Dave Mack, Vahe Mamyan, Dimitri Margaziotis, Pete Markowitz, James Maxwell, Georgie Mbianda Njencheu, Dave Meekins, Mehdi Meziane, Jonathan Miller, Arthur Mkrtchyan, Hamlet Mkrtchyan, Jonathan Mulholland, Vladimir Nelyubin, Lubomir Pentchev, Charles Perdrisat, Eliazer Piasetzky, Yelena Prok, Andrew Puckett, Vina Punjabi, Mitra Hashemi Shabestari, Albert Shahinyan, Karl Slifer, Greg Smith, Patricia Solvignon-Slifer, Ramesh Subedi, Frank Wesselmann, Stephen Wood, Z. Ye, Xiaochao Zheng | ||||
| Publication Date | October 2015 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Exp Nuclear Physics / Experimental Halls / Hall C | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | Yes | ||||
| Experiment Number(s) |
E07-002
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| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review Letters |
| Refereed | Yes |
| Volume | 115 |
| Issue | 15 |
| Page(s) | 152001 |
Attachments/Datasets/DOI Link
| Document(s) |
1506.04045v2.pdf
(STI Document)
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| DOI Link | |
| Dataset(s) | (none) |
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