Publications
Publication Information
| Title | First comprehensive measurement of spin observables and differential cross sections ds/dt in w photoproduction off the proton for 2.7 < Ey < 5.2 GeV using CLAS |
| Authors | Tianqi Hu, Zulkaida Akbar, Volker Crede, Jean-Marc Laget, Vincent Mathieu, Artur Amaryan, W. Armstrong, Hamza Atac, Nathan Baltzell, Luca Barion, Marco Battaglieri, Ivan Bedlinskiy, Bruno Benkel, Fatiha Benmokhtar, Andrea Bianconi, Letterio Biondo, Angela Biselli, Mariangela Bondi, Francesco Bossu, S. Boiarinov, Wilbert Briscoe, Stephen Bueltmann, Dilini Bulumulla, Volker Burkert, Richard Capobianco, Daniel Carman, Jose Carvajal, Andrea Celentano, T. Chetry, GIUSEPPE CIULLO, Geraint Clash, P. Cole, Marco Contalbrigo, Giovanni Costantini, Natalya Dashyan, Raffaella De Vita, Maxime Defurne, Alexandre Deur, S. Diehl, Chaden Djalali, Raphael Dupre, Hovanes Egiyan, Ahmed El Alaoui, L. El Fassi, Latifa Elouadrhiri, Paul Eugenio, Stuart Fegan, Alessandra Filippi, Gagik Gavalian, Yeranuhi Ghandilyan, Gerard Gilfoyle, Francois-Xavier Girod-Gard, Anna Golubenko, Giulia Gosta, R. W. Gothe, Keith Griffioen, Michel Guidal, Kawtar Hafidi, Hayk Hakobyan, Mohammad Hattawy, T. Hayward, David Heddle, Adam Hobart, Maurik Holtrop, Yordanka Ilieva, David Ireland, Evgeny Isupov, D. Jenkins, H. Jo, K. Joo, Sylvester Joosten, D. Keller, Achyut Khanal, Mahbub Khandaker, Kim Alston, W. Kim, F. Klein, V. Klimenko, Aron Kripko, Valery Kubarovsky, Victoria Lagerquist, Lucilla Lanza, Marco Leali, Paolo Lenisa, K. Livingston, Ian MacGregor, Claude Marchand, Luca Marsicano, Valerio Mascagna, Maurice McCracken, Bryan McKinnon, Zein-Eddine Meziani, Stefano Migliorati, Richard Milner, Taisiya Mineeva, Marco Mirazita, Viktor Mokeev, Carlos Munoz Camacho, Pawel Nadel-Turonski, Krishna Neupane, J. Newton, Silvia Niccolai, M. Nicol, Gabriel Niculescu, Mikhail Osipenko, Alexander Ostrovidov, Pushpa Pandey, Michael Paolone, Luciano Pappalardo, Rafayel Paremuzyan, Eugene Pasyuk, S. Paul, W. Phelps, Noémie Pilleux, Oleg Pogorelko, J. Price, Yelena Prok, Brian Raue, T. Reed, Marco Ripani, James Ritman, Alessandro Rizzo, Guenther Rosner, Franck Sabatie, Carlos Salgado, Susan Schadmand, Axel Schmidt, R. Schumacher, Evgeny Shirokov, U. Shrestha, Paul Simmerling, Daria Sokhan, Nikolaos Sparveris, Armenak Stepanyan, Igor Strakovsky, Steffen Strauch, R. Tyson, M. Ungaro, Luca Venturelli, Hakob Voskanyan, Anselm Vossen, Eric Voutier, D. P. Watts, X. Wei, M. H. Wood, Bradley Yale, Mikhail Yurov, Nicholas Zachariou, J. Zhang |
| JLAB number | JLAB-PHY-22-3587 |
| LANL number | (None) |
| Other number | DOE/OR/23177-6274 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review Letters | |
| Publication Abstract: | We report on the differential cross sections d?/dt, the unpolarized spin-density matrix elements ? 0 00, ? 0 1?1, Re ? 0 10, and the first extraction of the polarized elements Im ? 3 10, Im ? 3 1?1 for the reaction ?p ? p? using the CLAS spectrometer at Jefferson Laboratory. The ? mesons were detected in their dominant charged decay mode, ? ? ? +? ?? 0 , and all t-dependent results are presented in a fine binning for incident photon energies between 2.73 and 5.16 GeV (corresponding to the center-of-mass energy range W ? [ 2.45, 3.25 ] GeV). All matrix elements are first measurements for ?t > 0.6 GeV2 . Moreover, differential cross sections d?/d(cos ?) and the unpolarized spin-density matrix elements in the Adair frame are presented for the incident photon energy range 1.563.80 GeV (corresponding to W ? [ 1.95, 2.83 ] GeV). These new ? photoproduction data are consistent with earlier CLAS results but extend the energy range well beyond the nucleon resonance region into the Regge regime. The comparison with Regge-theory-based model predictions shows that the new data impose more stringent constraints on our understanding of ? photoproduction. |
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| Group: | Hall B |
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