Measurement of the Slope Parameter α for the eta-->3pi^0 decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C) (CROSBI ID 149784)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Prakhov, S. ; Nefkens, B. M. K. ; Aguar-Bartolomé, P. ; Akasoy, L. K. ; Annand, J. R. M. ; Arends, H. J. ; Bantawa, K. ; Beck, R. ; Bekrenev, V. ; Berghäuser, H. ; 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. ; Glazier, D. I. ; Gregor, R. ; Heid, E. ; Hornidge, D. ; Jahn, O. ; Jude, T. C. ; Kashevarov, V. L. ; Kellie, J. D. ; Kondratiev, R. ; Korolija, Milorad ; Kotulla, M. ; Koulbardis, A. ; Krambrich, D. ; Kruglov, S. ; Krusche, B. ; Lang, M. ; Lisin, V. ; Livingston, K. ; MacGregor, I. J. D. ; Maghrbi, Y. ; Manley, D. M. ; Martinez, M. ; McGeorge, J. C. ; McNicoll, E. F. ; Mekterović, Darko ; Metag, V. ; Mićanović, Saša ; Nikolaev, A. ; Novotny, R. ; Ostrick, M. ; Otte, P. B. ; Pedroni, P. ; Pheron, F. ; Polonski, A. ; Robinson, J. ; Rosner, G. ; Rost, M. ; Rostomyan, T. ; Schumann, S. ; Sikora, M. H. ; Sober, D. I. ; Starostin, A. ; Suarez, I. M. ; Supek, Ivan ; Tarbert, C. M. ; Thiel, M. ; Thomas, A. ; Unverzagt, M. ; Watts, D. P. ; Zamboni, Ivana ; Zehr, F.
engleski
Measurement of the Slope Parameter α for the eta-->3pi^0 decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C)
The dynamics of the eta→ 3pi^0 decay have been studied with the Crystal Ball multiphoton spectrometer and the TAPS calorimeter. Bremsstrahlung photons produced by the 1.5-GeV electron beam of the Mainz microtron MAMI-C and tagged by the Glasgow photon spectrometer were used for eta-meson production. The analysis of 3×10^6 gamma p→ eta p→ 3 pi^0 p→ 6 gama p events yields the value alpha = -0.032 +/- 0.003 for the eta→ 3pi^0 slope parameter, which agrees with the majority of recent experimental results and has the smallest uncertainty. The pi^0pi^0 invariant-mass spectrum was investigated for the occurrence of a cusplike structure in the vicinity of the pi^+pi^-threshold. The observed effect is small and does not affect our measured value for the slope parameter.
tagged photon spectrometer; eta-meson decay; slope parameter alpha
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Podaci o izdanju
79 (3)
2009.
035204-1-035204-13
objavljeno
0556-2813
10.1103/PhysRevC.79.035204
