Beam asymmetry Σ for the photoproduction of η and η' mesons at Eγ=8.8GeV

Adhikari, S.; Ali, A.; Amaryan, M.; Austregesilo, A.; Barbosa, F.; Barlow, J.; Barnes, A.; Barriga, E.; Barsotti, R.; Beattie, T. D.; Berdnikov, V. V.; Black, T.; Boeglin, W.; Boer, M.; Briscoe, W. J.; Britton, T.; Brooks, W. K.; Cannon, B. E.; Cao, N.; Chudakov, E.; Cole, S.; Cortes, O.; Crede, V.; Dalton, M. M.; Daniels, T.; Deur, A.; Dobbs, S.; Dolgolenko, A.; Dotel, R.; Dugger, M.; Dzhygadlo, R.; Egiyan, H.; Erbora, T.; Ernst, A.; Eugenio, P.; Fanelli, C.; Fegan, S.; Foda, A. M.; Foote, J.; Frye, J.; Furletov, S.; Gan, L.; Gasparian, A.; Gevorgyan, N.; Gleason, C.; Goetzen, K.; Goncalves, A.; Goryachev, V. S.; Guo, L.; Hakobyan, H.; Hamdi, A.; Huber, G. M.; Hurley, A.; Ireland, D. G.; Ito, M. M.; Jarvis, N. S.; Jones, R. T.; Kakoyan, V.; Kalicy, G.; Kamel, M.; Kourkoumelis, C.; Kuleshov, S.; Larin, I.; Lawrence, D.; Lersch, D. I.; Li, H.; Li, W.; Liu, B.; Livingston, K.; Lolos, G. J.; Lyubovitskij, V.; Mack, D.; Marukyan, H.; Mattione, P.; Matveev, V.; McCaughan, M.; McCracken, M.; McGinley, W.; Meyer, C. A.; Miskimen, R.; Mitchell, R. E.; Nerling, F.; Ng, L.; Ostrovidov, A. I.; Papandreou, Z.; Patsyuk, M.; Paudel, C.; Pauli, P.; Pedroni, R.; Pentchev, L.; Peters, K. J.; Phelps, W.; Pooser, E.; Qin, N.; Reinhold, J.; Ritchie, B. G.; Robison, L.; Romanov, D.; Romero, C.; Salgado, C.; Schertz, A. M.; Schumacher, R. A.; Schwiening, J.; Semenov, A. Yu.; Semenova, I. A.; Seth, K. K.; Shen, X.; Shepherd, M. R.; Smith, E. S.; Sober, D. I.; Somov, A.; Somov, S.; Soto, O.; Staib, M.; Stevens, J. R.; Strakovsky, I. I.; Suresh, K.; Tarasov, V. V.; Teymurazyan, A.; Thiel, A.; Vasileiadis, G.; Whitlatch, T.; Wickramaarachchi, N.; Williams, M.; Xiao, T.; Yang, Y.; Zarling, J.; Zhang, Z.; Zhao, G.; Zhou, Q.; Zhou, X.; Zihlmann, B.

doi:10.1103/PhysRevC.100.052201

Beam asymmetry $Σ$ for the photoproduction of $η$ and $η^{'}$ mesons at $E_{γ} = 8.8 GeV$

Journal Article · Wed Nov 27 00:00:00 EST 2019 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.100.052201· OSTI ID:1575903

Adhikari, S. ^[1]; Ali, A.; Amaryan, M.; Austregesilo, A.; Barbosa, F.; Barlow, J.; Barnes, A.; Barriga, E.; Barsotti, R.; Beattie, T. D.; Berdnikov, V. V.; Black, T.; Boeglin, W.; Boer, M.; Briscoe, W. J.; Britton, T.; Brooks, W. K.; Cannon, B. E.; Cao, N.; Chudakov, E. more »

Carnegie Mellon University

In this work, we report on the measurement of the beam asymmetry $$\Sigma$$ for the reactions $$\vec{\gamma}p\rightarrow p\eta$$ and $$\vec{\gamma}p \rightarrow p\eta^{\prime}$$ from the GlueX experiment, using an 8.2–8.8-GeV linearly polarized tagged photon beam incident on a liquid hydrogen target in Hall D at Jefferson Lab. These measurements are made as a function of momentum transfer $-t$, with significantly higher statistical precision than our earlier $$\eta$$ measurements, and are the first measurements of $$\eta^{\prime}$$ in this energy range. We compare the results to theoretical predictions based on $$t$$--channel quasi-particle exchange. Furthermore, we compare the ratio of $$\Sigma_{\eta}$$ to $$\Sigma_{\eta^{\prime}}$$ to these models, as this ratio is predicted to be sensitive to the amount of $$s\bar{s}$$ exchange in the production. We find that photoproduction of both $$\eta$$ and $$\eta^{\prime}$$ is dominated by natural parity exchange with little dependence on $-t$.

View Accepted Manuscript (DOE)

Research Organization:: Carnegie Mellon Univ., Pittsburgh, PA (United States); George Washington Univ., Washington, DC (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); University of Massachusetts, Amherst, MA (United States)

Sponsoring Organization:: Chilean Comisión Nacional de Investigación Científica y Tecnológica; China Scholarship Council; GSI Helmholtzzentrum für Schwerionenforschung GmbH; German Research Foundation, National Natural Science Foundation of China (NNSFC); National Science Foundation (NSF); Russian Foundation for Basic Research; UK Science and Technology Facilities Council; USDOE Office of Science (SC); USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Contributing Organization:: The GlueX Collaboration

Grant/Contract Number:: AC05-06OR23177; FG02-87ER40315; FG02-88ER40415; SC0016583

OSTI ID:: 1575903

Alternate ID(s):: OSTI ID: 1641192
OSTI ID: 1659120
OSTI ID: 1594363

Report Number(s):: DOE/OR--23177-4859; GlueX-Doc 4093; JLAB-PHY--19-3117; arXiv:1908.05563; DE-AC05-06OR23177

Journal Information:: Physical Review C, Journal Name: Physical Review C Journal Issue: 5 Vol. 100; ISSN PRVCAN; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Beam asymmetry Σ for the photoproduction of η and η' mesons at Eγ=8.8GeV

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Beam asymmetry $Σ$ for the photoproduction of $η$ and $η^{'}$ mesons at $E_{γ} = 8.8 GeV$