Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead
Year: 2020
Type: article
Abstract: The beam-helicity asymmetry was measured, for the first time, in photoproduction of π 0 η pairs on carbon, aluminum, and lead, with the A2 experimental setup at MAMI. The results are compared to an earlier measurement on a free proton and to the corresponding theoretical calculations. The Mainz model is used to predict the beam-helicity asymmetry for the nuclear targets. The present results indicate that the photoproduction mechanism for π 0 η pairs on nuclei is similar to photoproduction on a free nucleon. This process is dominated by the D 33 partial wave with the η Δ ( 1232 ) intermediate state.
Source: Physics Letters B
Authors: V. Sokhoyan, S. Prakhov, A. Fix, S. Abt, P. Achenbach, P. Adlarson, F. Afzal, P. Aguar-Bartolomé, Z. Ahmed, K. Altangerel, J.R.M. Annand, H.J. Arends, K. Bantawa, M. Bashkanov, R. Beck, M. Biroth, N.S. Borisov, A. Braghieri, W.J. Briscoe, S. Cherepnya, F. Cividini, C. Collicott, S. Costanza, A. Denig, M. Dieterle, E.J. Downie, P. Drexler, M.I. Ferretti Bondy, L.V. Fil'kov, S. Gardner, S. Garni, D.I. Glazier, I. Gorodnov, W. Gradl, M. Günther, G.M. Gurevich, L. Heijkenskjöld, D. Hornidge, G.M. Huber, A. Käser, V.L. Kashevarov, S. Kay, I. Keshelashvili, R. Kondratiev, M. Korolija, B. Krusche, A. Lazarev, K. Livingston, S. Lutterer, I.J.D. MacGregor, R. Macrae, D.M. Manley, P.P. Martel, J.C. McGeorge, D.G. Middleton, R. Miskimen, E. Mornacchi, C. Mullen, A. Mushkarenkov, A. Neganov, A. Neiser, M. Oberle, M. Ostrick, P.B. Otte, D. Paudyal, P. Pedroni, A. Powell, E. Rickert, G. Ron, T. Rostomyan, A. Sarty, C. Sfienti, K. Spieker, O. Steffen, I.I. Strakovsky, B. Strandberg, Th. Strub, I. Supek, A. Thiel, M. Thiel, A. Thomas, M. Unverzagt, Yu.A. Usov, S. Wagner, N.K. Walford, D.P. Watts, D. Werthmüller, J. Wettig, L. Witthauer, M. Wolfes, N. Zachariou
Institutions: Johannes Gutenberg University Mainz, University of California, Los Angeles, Tomsk Polytechnic University, University of Basel, University of Bonn, University of Regina, University of Glasgow, Kent State University, University of York, Joint Institute for Nuclear Research, Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, George Washington University, P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Dalhousie University, Saint Mary's University, University of Pavia, Institute for Nuclear Research, Mount Allison University, Ruđer Bošković Institute, University of Massachusetts Amherst, Hebrew University of Jerusalem
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: National Science Foundation, U.S. Department of Energy, George Washington University, Carl-Zeiss-Stiftung, Tomsk Polytechnic University, Deutsche Forschungsgemeinschaft, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Russian Foundation for Basic Research, Mount Allison University, Office of Science, Natural Sciences and Engineering Research Council of Canada, Science and Technology Facilities Council, Nuclear Physics
Awards: MEDIUM ENERGY NUCLEAR PHYSICS, G1681183204, G1861050445, G222768804, PRECISION STUDIES OF QCD AND ELECTRO-WEAK INTERACTIONS, G2413970849, Erforschung der Möglichkeiten der Bildspektrometrie als Methode der Umweltanalytik in der Erdbeobachtung, G3161623781, INVESTIGATIONS OF BARYON SPECTROSCOPY VIA ELECTROMAGNETIC AND HADRONIC SCATTERING, G3795454412, G3895161700, Differentiation of smooth muscle cells. The development of structural and functional characteristics, G4046832244, Investigation of the Strong Interaction: Elementary Systems and Nuclei, Exploring the excitation spectrum of hardons with polarised photon beams, G5227872176, Computational Studies of Nanoparticle Formation and Bulk Properties for Biomineralization, Investigation of the Strong Interaction: Elementary Systems and Nuclei, Investigations of the Strong Interaction, G5599649393, EXPERIMENTAL INVESTIGATIONS OF HADRON SPECTROSCOPY AT ACCELERATOR FACILITIES, G628552264, DATA ANALYSIS CENTER FOR ELECTROMAGNETIC AND HADRONIC SCATTERING PROCESSES, Investigations of the Strong Interaction, Transfer of Research Grant Funds (from ST/P004008/1 to ST/P003885/1), Investigations of the Strong Interaction, G723336386, G7464526398, Exploring new states of matter (New Applicant scheme), IRES -Experimental Nuclear Physics at the Mainz Microtron, Collaborative Research: COSEE: Ocean Communities in Education And social Networks (COSEE-OCEAN)
OpenAlex ID: W2953671759