Measurement of the slope parameter α for the η→3π0 decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C)

Prakhov, S. and Nefkens, B. M. K. and Aguar-Bartolome, P. and Akasoy, L. K. and Annand, J. R. M. and Arends, H. J. and Bantawa, K. and Beck, R. and Bekrenev, V. and Berghaeuser, H. and Boillat, B. and Braghieri, A. and Branford, D. and Briscoe, W. J. and Brudvik, J. and Cherepnya, S. and Codling, R. F. B. and Downie, E. J. and Drexler, P. and Fil`kov, L. V. and Glazier, D. I. and Gregor, R. and Heid, E. and Hornidge, D. and Jahn, O. and Jude, T. C. and Kashevarov, V. L. and Kellie, J. D. and Kondratiev, R. and Korolija, M. and Kotulla, M. and Koulbardis, A. and Krambrich, D. and Kruglov, S. and Krusche, B. and Lang, M. and Lisin, V. and Livingston, K. and MacGregor, I. J. D. and Maghrbi, Y. and Manley, D. M. and Martinez, M. and McGeorge, J. C. and McNicoll, E. F. and Mekterovic, D. and Metag, V. and Micanovic, S. and Nikolaev, A. and Novotny, R. and Ostrick, M. and Otte, P. B. and Pedroni, P. and Pheron, F. and Polonski, A. and Robinson, J. and Rosner, G. and Rost, M. and Rostomyan, T. and Schumann, S. and Sikora, M. H. and Sober, D. I. and Starostin, A. and Suarez, I. M. and Supek, I. and Tarbert, C. M. and Thiel, M. and Thomas, A. and Unverzagt, M. and Watts, D. P. and Zamboni, I. and Zehr, F.. (2009) Measurement of the slope parameter α for the η→3π0 decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C). Physical review. C, Nuclear physics, Vol. 79, H. 3 , 035204, 13 S..

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Official URL: http://edoc.unibas.ch/dok/A5261909

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The dynamics of the eta -< 3 pi(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 3x10(6) gamma p -<eta p -< 3 pi(0)p -< 6 gamma p events yields the value alpha=-0.032 +/- 0.003 for the eta -< 3 pi(0) slope parameter, which agrees with the majority of recent experimental results and has the smallest uncertainty. The pi(0)pi(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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physics
Note:Variant title: Measurement of the slope parameter alpha for the eta -< 3 pi(0) decay with the Crystal Ball detector at the Mainz Microtron (MAMI-C) -- Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:49

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