STI Publications - View Publication Form #14446
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Publication Information
| Title | Target and Beam-Target Spin Asymmetries in Exclusive Pion Electroproduction for $Q^2>1$ GeV$^2$. I. $e p \rightarrow e ¿^+ n$ | ||||
| Abstract | Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive $\pi^+$ electroproduction reaction $\gamma^* p \to n \pi^+$. The results were obtained from scattering of 6 GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Lab. The kinematic range covered is $1.1<W<3$ GeV and $1<Q^2<6$ GeV$^2$. Results were obtained for about 6000 bins in $W$, $Q^2$, $\cos(\theta^*)$, and $\phi^*$. Except at forward angles, very large target-spin asymmetries are observed over the entire $W$ region. Reasonable agreement is found with phenomenological fits to previous data for $W<1.6$ GeV, but very large differences are seen at higher values of $W$. A GPD-based model is in poor agreement with the data. When combined with cross section measurements, the present results provide powerful constraints on nucleon resonance amplitudes at moderate and large values of $Q^2$, for resonances wi | ||||
| Author(s) | Peter Bosted, Moskov Amaryan, Sergio Pereira, Harut Avagyan, Rafael Badui, Jacques Ball, Nathan Baltzell, Marco Battaglieri, V. Batourine, Ivan Bedlinskiy, Angela Biselli, Bill Briscoe, Stephen Bueltmann, Volker Burkert, Daniel Carman, Andrea Celentano, Shloka Chandavar, Gabriel Charles, L. Clark, Luca Colaneri, Phil Cole, Marco Contalbrigo, Volker Crede, Annalisa D'Angelo, Raffaella De Vita, Alexandre Deur, Enzo De Sanctis, Chaden Djalali, Raphael Dupre, Hovanes Egiyan, Ahmed El Alaoui, Lamiaa El Fassi, Latifa Elouadrhiri, Paul Eugenio, Erica Fanchini, Gleb Fedotov, Alessandra Filippi, Jamie Fleming, Tony Forest, Ahmed Fradi, Nerses Gevorgyan, Jerry Gilfoyle, Francois-Xavier Girod-Gard, Colin Gleason, Wesley Gohn, Evgeny Golovach, Ralf Gothe, Keith Griffioen, Michel Guidal, Hayk Hakobyan, Mohammad Hattawy, Ken Hicks, Maurik Holtrop, Simon Hughes, Yordanka Ilieva, David Ireland, Boris Ishkhanov, Evgeny Isupov, Hao Jiang, Hyon-Suk Jo, Kyungseon Joo, Sylvester Joosten, Grigor Khachatryan, Mahbub Khandaker, Andrey Kim, Wooyoung Kim, Franz Klein, Suman Koirala, Valery Kubarovsky, Sebastian Kuhn, Lucilla Lanza, Lelia Net, Paolo Lenisa, Kenneth Livingston, Ian Macgregor, Michael McCracken, Bryan McKinnon, Curtis Meyer, Marco Mirazita, Viktor Mokeev, Rachel Montgomery, Edwin Munevar Espitia, Carlos Munoz Camacho, Gavin Murdoch, Pawel Nadel-Turonski, Silvia Niccolai, Mikhail Osipenko, Alexander Ostrovidov, Kijun Park, Eugene Pasyuk, Peng Peng, William Phelps, Silvia Pisano, Oleg Pogorelko, John Price, Yelena Prok, Dan Protopopescu, Brian Raue, Marco Ripani, Guenther Rosner, Patrizia Rossi, Reinhard Schumacher, Iuliia Skorodumina, Greg Smith, Daria Sokhan, Nikos Sparveris, Ivana Stankovic, Igor Strakovsky, Steffen Strauch, Mauro Taiuti, Bayram Torayev, Maurizio Ungaro, Hakob Voskanyan, Eric Voutier, Xiangdong Wei, Larry Weinstein, Jixie Zhang, Irene Zonta | ||||
| Publication Date | March 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 | Yes | ||||
| Experiment Number(s) |
E05-114
E05-113
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| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review C |
| Refereed | Yes |
| Volume | 95 |
| Issue | 03 |
| Page(s) | 035206 |
Attachments/Datasets/DOI Link
| Document(s) |
1607.07518v3.pdf
(STI Document)
1607.07518v3.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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