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Publication Information
| Title | Measurement of the helicity asymmetry E in w-->p+p-p0 photoproduction | ||||
| Abstract | The double-polarization observable E was studied for the reaction yp --> pw using the CEBAF Large Acceptance Spectrometer (CLAS) in Hall B at the Thomas Jefferson National Accelerator Facility and the longitudinally-polarized frozen-spin target (FROST). The observable was measured from the charged decay mode of the meson, w --> p+p-p0 using a circularly-polarized tagged-photon beam with energies ranging from the w threshold at 1.1 GeV to 2.3 GeV. A partial-wave analysis within the Bonn-Gatchina framework found dominant contributions from the 3=2+ partial wave near threshold, which is identified with the sub-threshold N(1720) 3=2+ nucleon resonance. To describe the entire data set, which consisted of w differential cross sections and a large variety of polarization observables, further contributions from other nucleon resonances were found to be necessary. With respect to non-resonant mechanisms, p exchange in the t-channel was found to remain small across the analyzed energy range, | ||||
| Author(s) | Zulkaida Akbar, Priyashree Roy, Sungkyun Park, Volker Crede, Alexei Anisovich, I. Denisenko, Eberhard Klempt, V. Nikonov, Andrey Sarantsev, Krishna Adhikari, Shankar Adhikari, Moskov Amaryan, Sergio Pereira, Harut Avagyan, Jacques Ball, Marco Battaglieri, V. Batourine, Ivan Bedlinskiy, Sergey Boyarinov, Bill Briscoe, James Brock, Will Brooks, Volker Burkert, Frank Cao, Chris Carlin, Daniel Carman, Andrea Celentano, Gabriel Charles, Taya Chetry, Giuseppe Ciullo, L. Clark, Phil Cole, Marco Contalbrigo, Olga Cortes Becerra, Annalisa D'Angelo, Natalya DASHYAN, Raffaella De Vita, Enzo De Sanctis, Alexandre Deur, Chaden Djalali, Michael Dugger, Raphael Dupre, Hovanes Egiyan, Lamiaa El Fassi, Paul Eugenio, Gleb Fedotov, Robert Fersch, Alessandra Filippi, Ahmed Fradi, Michel Garcon, Nerses Gevorgyan, Kevin Giovanetti, Francois-Xavier Girod-Gard, Colin Gleason, Wesley Gohn, Evgeny Golovach, Ralf Gothe, Keith Griffioen, Michel Guidal, Lei Guo, Kawtar Hafidi, Hayk Hakobyan, Charles Hanretty, Nathan Harrison, Mohammad Mohammad Hattawy, David Heddle, Ken Hicks, Gary Hollis, Maurik Holtrop, David Ireland, Boris Ishkhanov, Evgeny Isupov, David Jenkins, Sylvester Joosten, Christopher Keith, Dustin Keller, Grigor Khachatryan, Mariana Khachatryan, Mahbub Khandaker, Andrey Kim, Wooyoung Kim, Andi Klein, Franz Klein, Valery Kubarovsky, Lucilla Lanza, Kenneth Livingston, Ian Macgregor, Nikolay Markov, Bryan McKinnon, Dave Meekins, Taisiya Mineeva, Viktor Mokeev, Aram Movsisyan, Carlos Munoz Camacho, Pawel Nadel-Turonski, Silvia Niccolai, Mikhail Osipenko, Alexander Ostrovidov, Michael Paolone, Rafayel Paremuzyan, Kil Park, Eugene Pasyuk, William Phelps, Oleg Pogorelko, John Price, Yelena Prok, Dan Protopopescu, Brian Raue, Marco Ripani, Barry Ritchie, Alessandro Rizzo, Guenther Rosner, Franck Sabatie, Carlos Salgado, Reinhard Schumacher, Mikell Seely, Youri Sharabian, Iuliia Skorodumina, Greg Smith, Dan Sober, Daria Sokhan, Nikos Sparveris, Stepan Stepanyan, Igor Strakovsky, Steffen Strauch, Mauro Taiuti, Maurizio Ungaro, Hakob Voskanyan, Eric Voutier, Xiangdong Wei, Mike Wood, Nicholas Zachariou, Lorenzo Zana, Jixie Zhang, Zhiwen Zhao | ||||
| Publication Date | December 2017 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Exp Nuclear Physics / Experimental Halls / Hall B | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review C |
| Refereed | Yes |
| Volume | 96 |
| Issue | |
| Page(s) | 065209 |
Attachments/Datasets/DOI Link
| Document(s) |
CLAS.pdf
(STI Document)
JLAB-PHY-17-2532.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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