High-statistics measurement of the η → 3π0 decay at MAMI
- Prakhov, S.
- Abt, S.
- Adlarson, P.
- Afzal, F.
- Aguar-Bartolome, P.
- Ahmed, |.
- Ahrens, J.
- Annand, J.R.M.
- Arends, H.J.
- Bantawa, K.
- Bashkanov, M.
- Beck, R.
- Biroth, M.
- Borisov, N.S.
- Braghieri, A.
- Briscoe, W.J.
- Cherepnya, S.
- Cividini, F.
- Collicott, C.
- Costanza, S.
- Denig, A.
- Dieterle, M.
- Downie, E.J.
- Drexler, P.
- Ferretti Bondy, M.I.
- Fil'kov, L.V.
- Fix, A.
- Gardner, S.
- Garni, S.
- Glazier, D.I.
- Gordonov, I.
- Gradl, W.
- Gurevich, G.M.
- Heijkenskjöld, L.
- Hornidge, D.
- Huber, G.M.
- Käser, A.
- Kashevarov, V.L.
- Kay, S.
- Keshelashvili, I.
- Kondratiev, R.
- Korolija, M.
- Krusche, B.
- Lazarev, A.
- Lisin, V.
- Livingston, K.
- Lutterer, S.
- MacGregor, I.J.D.
- Manley, D.M.
- Martel, P.P.
- McGeorge, J.C.
- Middleton, D.G.
- Miskimen, R.
- Mornacchi, E.
- Mushkarenkov, A.
- Neganov, A.
- Neiser, A.
- Oberle, M.
- Ostrick, M.
- Otte, P.B.
- Paudyal, D.
- Pedroni, P.
- Polonski, A.
- Ron, G.
- Rostomyan, T.
- Sarty, A.
- Sfienti, C.
- Sokhoyan, V.
- Spieker, K.
- Steffen, O.
- Strakovsky, I.I.
- Strandberg, B.
- Strub, Th.
- Supek, I.
- Thiel, A.
- Thiel, M.
- Thomas, A.
- Unverzagt, M.
- Usov, Yu. A.
- Wagner, S.
- Walford, N.K.
- Watts, D.P.
- Werthmüller, D.
- Wettig, J.
- Witthauer, L.
- Wolfes, M.
- Zana, L.A.
Publication date
June 2018
DOI Publisher
American Physical Society (APS) Language
EnglishAbstract
The largest, at the moment, statistics of 7×106 η→3π0 decay s, based on 6.2×107 η mesons produced in the γp→ηp r eaction, has been accumulated by the A2 Collaboration at the Mainz Microtron, MAMI. It allowed a detailed study of the η→3π0 dynamics beyond its conventional parametrization with just the quadratic slope parameter α and enabled, for the first time, a measurement of the second-order ter m and a better understanding of the cusp structure in the neutral decay. The present data are also compared to recent theoretical calculations that predict a nonlinear dependence along the quadratic distance from the Dalitz-plot center
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