Coherent photoproduction of Pi0 and eta mesons off 7Li (CROSBI ID 192409)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Maghrbi, Y. ; Krusche, B. ; Ahrens, J. ; Annand, J.R.M. ; Arends, H.J. ; Beck, R. ; Bekrenev, V. ; Boillat, B. ; Braghieri, A. ; Branford, D. ; Briscoe, W.J. ; Brudvik, J. ; Cherepnya, S. ; Codling, R.F.B. ; Downie, E.J. ; Drexler, P. ; Fil'kov, L.V. ; Fix, A. ; Glazier, D.I. ; Gregor, R. ; Heid, E. ; Hornidge, D. ; Jaegle, I. ; Jahn, O. ; Kashevarov, V.L. ; Keshelashvili, I. ; Knežević, Andrea ; Kondratiev, R. ; Korolija, Milorad ; Krambrich, D. ; Lang, M. ; Lisin, V. ; Livingston, K. ; Lugert, S. ; MacGregor, I.J.D. ; Manley, D.M. ; Martinez, M. ; McGeorge, J.C. ; Mekterović, Darko ; Metag, V. ; Nefkens, B.M.K. ; Nikolaev, A. ; Novotny, R. ; Ostrick, M. ; Pedroni, P. ; Pheron, F. ; Polonski, A. ; Prakhov, S. ; Price, J.W. ; Rosner, G. ; Rost, M. ; Rostomyan, T. ; Schadmand, S. ; Schumann, S. ; Sober, D. ; Starostin, A. ; Supek, Ivan ; Tarbert, C.M. ; Thomas, A. ; Unverzagt, M. ; Watts, D.P. ; Werthmuller, D. ; Zehr, F.
engleski
Coherent photoproduction of Pi0 and eta mesons off 7Li
Coherent photoproduction of ?0-mesons from threshold (Eth? 136 MeV) throughout the ?- resonance region and of ?-mesons close to the production threshold (Eth? 570 MeV for ?) has been measured for 7Li nuclei. The experiment was performed using the tagged-photon beam of the Mainz MAMI accelerator with the Crystal Ball and TAPS detectors combined to give an almost 4? solid-angle electromagnetic calorimeter. The reactions were identified by a combined invariant- mass and missing-energy analysis. A comparison of the pion data to plane-wave impulse modelling tests the nuclear mass form factor. So far coherent ?-production had been only identified for the lightest nuclear systems (2H and 3He). For 3He a large enhancement of the cross section above plane-wave approximations had been reported, indicating the formation of a quasi-bound state. The present Li-data for ?-production agree with a plane-wave approximation. Contrary to 3He, neither a threshold enhancement of the total cross section nor a deviation of the angular distributions from the expected form-factor dependence were observed.ed form-factor dependence were observed.
Meson production ; Baryon resonances ; photoproduction
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nije evidentirano
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nije evidentirano
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Podaci o izdanju
49
2013.
13038-3
14
objavljeno
1434-6001
1434-601X
10.1140/epja/i2013-13038-3
