Study of eta and eta' Photoproduction at MAMI (CROSBI ID 252003)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Kashevarov, V. L. ; Ott, P. ; Prakhov, S. ; Adlarson, P. ; Afzal, F. ; Ahmed, Z. ; Akondi, C. S. ; Annand, J. R. M. ; Arends, H. J. ; Beck, R. ; Braghieri, A. ; Briscoe, W. J. ; Cividini, F. ; Codling, R. ; Collicott, C. ; Costanza, S. ; Denig, A. ; Downie, E. J. ; Dieterle, M. ; Ferretti Bondy, M. I. ; Fil’kov, L. V. ; Fix, A. ; Gardner, S. ; Garni, S. ; Glazier, D. I. ; Glowa, D. ; Gradl, W. ; Gurevich, G. ; Hamilton, D. J. ; Hornidge, D. ; Howdle, D. ; Huber, G. M. ; Käser, A. ; Kay, S. ; Keshelashvili, I. ; Kondratiev, R. ; Korolija, Milorad ; Krusche, B. ; Linturi, J. ; Lisin, V. ; Livingston, K. ; MacGregor, I. J. D. ; MacRae, R. ; Mancell, J. ; Manley, D. M. ; Martel, P. P. ; McGeorge, J. C. ; McNicol, E. ; Middleton, D. G. ; Miskimen, R. ; Mornacchi, E. ; Mullen, C. ; Mushkarenkov, A. ; Neiser, A. ; Oberle, M. ; Ostrick, M. ; Otte, P. B. ; Oussena, B. ; Paudyal, D. ; Pedroni, P. ; Polyanski, V. V. ; Rajabi, A. ; Reicherz, G. ; Robinson, J. ; Rosner, G. ; Rostomyan, T. ; Sarty, A. ; Schott, D. M. ; Schumann, S. ; Sfienti, C. ; Sokhoyan, V. ; Spieker, K. ; Steffen, O. ; Strandberg, B. ; Strakovsky, I. I. ; Strub, Th. ; Supek, Ivan ; Taragin, M. F. ; Thiel, A. ; Thiel, M. ; Tiator, L. ; Thomas, A. ; Unverzagt, M. ; Wagner, S. ; Watts, D. P. ; Werthmüller, D. ; Wettig, J. ; Witthauer, L. ; Wolfes, M. ; Workman, R. L. ; Zana, L.
A2 Collaboration at MAMI
engleski
Study of eta and eta' Photoproduction at MAMI
The reactions γp→ηp and γp→η′p are measured from their thresholds up to the center-of-mass energy W=1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for η photoproduction at the energies in the vicinity of the η′ threshold, W=1896 MeV (Eγ=1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η′ total cross section from its threshold, can only be explained by a strong coupling of the poorly known N(1895)1/2− state to both ηp and η′p. Including the new high-accuracy results in the ηMAID fit to available η and η′ photoproduction data allows the determination of the N(1895)1/2− properties.
spectrometer ; photons ; proton ; taps
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Podaci o izdanju
118 (21)
2017.
212001
6
objavljeno
0031-9007
1079-7114
10.1103/PhysRevLett.118.212001
