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Title Measurement of the helicity asymmetry E for gamma p -> p pi^0 reaction in the resonance region
Authors C. Kim, Nicholas Zachariou, Mikhail Bashkanov, Wilbert Briscoe, Stuart Fegan, V. Kashevarov, K. Nikonov, Andrey Sarantsev, Axel Schmidt, Igor Strakovsky, Daniel Watts, R. L. Workman, Patrick Achenbach, Zulkaida Akbar, Artur Amaryan, G. Angelini, W. Armstrong, Hamza Atac, Lamya Baashen, Nathan Baltzell, Luca Barion, Marco Battaglieri, Ivan Bedlinskiy, Bruno Benkel Balbontin, Fatiha Benmokhtar, Nawal Benmouna, Andrea Bianconi, Angela Biselli, W. A. Booth, Francesco Bossu, S. Boiarinov, K. T. Brinkmann, J. Brock, Dilini Bulumulla, Volker Burkert, T. Cao, Christopher Carlin, Daniel Carman, Jose Carvajal, Pierre Chatagnon, Vitaly Chesnokov, Taya Chetry, Giuseppe Ciullo, Geraint Clash, P. Cole, Marco Contalbrigo, Olga Cortes Becerra, Giovanni Costantini, Volker Crede, A. D’Angelo, Natalya Dashyan, Raffaella De Vita, Maxime Defurne, Alexandre Deur, S. Diehl, Chaden Djalali, Michael Dugger, Gagik Gavalian, Gerard Gilfoyle, Anna Rusova, Giulia Gosta, R. W. Gothe, Keith Griffioen, Kawtar Hafidi, Hayk Hakobyan, Mohammad Hattawy, Florian Hauenstein, T. Hayward, David Heddle, Adam Hobart, Maurik Holtrop, Yordanka Ilieva, I. Illari, David Ireland, Evgeny Isupov, Hideko Iwamoto, D. Jenkins, H. Jo, R. Johnston, K. Joo, Sylvester Joosten, Tsuneo Kageya, C. D. Keith, D. Keller, Achyut Khanal, Kim Alston, W. Kim, F. Klein, Alexei Klimenko, Aron Kripko, Valery Kubarovsky, Lucilla Lanza, Marco Leali, S. Lee, X. Li, K. Livingston, Ian Macgregor, Claude Marchand, Valerio Mascagna, Bryan McKinnon, Stefano Migliorati, Richard Milner, Taisiya Mineeva, Viktor Mokeev, Carlos Munoz Camacho, Pawel Nadel-Turonski, Krishna Neupane, Silvia Niccolai, Mikhail Osipenko, Alexander Ostrovidov, P. Pandey, Michael Paolone, Luciano Pappalardo, Rafayel Paremuzyan, Eugene Pasyuk, S. Paul, Noémie Pilleux, Himal Pokhrel, Deewakar Poudel, J. Price, Yelena Prok, Antonio Radic, Niveditha Ramasubramanian, S. Ratlif, T. Reed, J. Richards, Marco Ripani, B. Ritchie, James Ritman, G. Rosner, Carlos Salgado, Susan Schadmand, Diane Schott, R. Schumacher, M. B. C Scott, M. L. Seely, Erin Seroka, Evgeny Shirokov, U. Shrestha, Daria Sokhan, Nikolaos Sparveris, Marco Spreafico, Steffen Strauch, J. Tan, R. Tyson, Annie Ungaro, Simone Vallarino, Luca Venturelli, Hakob Voskanyan, Eric Voutier, X. Wei, R. Williams, R. Wishart, M. H. Wood, Mikhail Yurov, J. Zhang, M. Zurek
JLAB number JLAB-PHY-23-3819
LANL number arXiv:2305.08616
Other number DOE/OR/23177-6194
Document Type(s) (Journal Article) 
Associated with EIC: No
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)
 

Journal
Compiled for European Physical Journal A
Volume 59
Page(s) 217
Publication Abstract: The double-spin-polarization observable E for E for gamma p -> p pi^0 has been measured with the CEBAF Large Acceptance Spectrometer (CLAS) at photon beam energies E_g from 0.367 to 2.173 GeV (corresponding to center-of-mass energies from 1.240 to 2.200 GeV) for pion center-of-mass angles, cos(theta^c.m._pi0), between -0.86 and 0.82. These new CLAS measurements cover a broader energy range and have smaller uncertainties compared to previous CBELSA data and provide an important indepen?83 dent check on systematics. These measurements are compared to predictions as well as new global fits from The George Washington University, Mainz, and Bonn-Gatchina groups. Their inclusion in multipole analyses will refine our understanding of the single-pion production contribution to the Gerasimov-Drell-Hearn sum rule and improve the determination of resonance properties.
Experiment Numbers:
Group: Hall B
Document: pdf
DOI: http://dx.doi.org/10.1140/epja/s10050-023-01123-3
Accepted Manuscript: s10050-023-01123-3.pdf
Supporting Documents:
Supporting Datasets: