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Kent State University

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Full-Text Articles in Physics

Measurement Of The Invariant-Mass Spectrum For The Two Photons From The Η→Π0Γγ Decay, S. N. Prakhov, B. M.K. Nefkens, C. E. Allgower, V. Bekrenev, W. J. Briscoe, J. Comfort, K. Craig, D. Grosnick, D. Isenhower, N. Knecht, D. Koetke, A. Koulbardis, N. Kozlenko, S. Kruglov, G. Lolos, I. Lopatin, D. Mark Manley, R. Manweiler, A. Marus˘Ić, S. Mcdonald, J. Olmsted, Z. Papandreou, D. Peaslee, N. Phaisangittisakul, J. W. Price, A. F. Ramirez, M. Sadler, A. Shafi, H. Spinka, T. D.S. Stanislaus, A. Starostin, H. M. Staudenmaier, I. Supek Jul 2008

Measurement Of The Invariant-Mass Spectrum For The Two Photons From The Η→Π0Γγ Decay, S. N. Prakhov, B. M.K. Nefkens, C. E. Allgower, V. Bekrenev, W. J. Briscoe, J. Comfort, K. Craig, D. Grosnick, D. Isenhower, N. Knecht, D. Koetke, A. Koulbardis, N. Kozlenko, S. Kruglov, G. Lolos, I. Lopatin, D. Mark Manley, R. Manweiler, A. Marus˘Ić, S. Mcdonald, J. Olmsted, Z. Papandreou, D. Peaslee, N. Phaisangittisakul, J. W. Price, A. F. Ramirez, M. Sadler, A. Shafi, H. Spinka, T. D.S. Stanislaus, A. Starostin, H. M. Staudenmaier, I. Supek

Physics Publications

New results on the rare, doubly radiative decay η→π0γγ have been obtained from a revised analysis of the Crystal Ball experiment performed at the AGS. The analysis yields the first information on the dependence of the decay width, Γ(η→π0γγ), on the two-photon invariant mass squared, m2(γγ). A re-evaluation of the branching ratio is also made, BR(η→π0γγ)=(2.21±0.24stat±0.47syst)×10−4; it implies that the decay width is Γ(η→π0γγ)=0.285±0.031stat±0.061syst eV ...