1. Open Access Kent State
  2. Measurement of the invariant-mass spectrum for the two photons from the η→π0γγ decay
Author(s)
Abstract

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. These results are close to predictions based on chiral perturbation theory with vector-meson dominance.
Format
Article
Identifier(s)
10.1103/PhysRevC.78.015206
Publication Date
2008-07-01
Publication Title
Physical Review C
Volume
78
Issue
1
First Page
015206-1
Last Page
015206-10
Keywords
Subject
Community
Department of Physics
Permalink https://oaks.kent.edu/phypubs/139
Prakhov, S., Nefkens, B., Allgower, C., Bekrenev, V., Briscoe, W., Comfort, J., Craig, K., Grosnick, D., Isenhower, D., Knecht, N., Koetke, D., Koulbardis, A., Kozlenko, N., Kruglov, S., Lolos, G., Lopatin, I., Manley, D., Manweiler, R., Marus˘ić, A., McDonald, S., Olmsted, J., Papandreou, Z., Peaslee, D., Phaisangittisakul, N., Price, J., Ramirez, A., Sadler, M., Shafi, A., Spinka, H., Stanislaus, T., Starostin, A., Staudenmaier, H., & Supek, I. (2008). Measurement of the invariant-mass spectrum for the two photons from the η→π0γγ decay. Physical Review C. https://doi.org/10.1103/PhysRevC.78.015206
Prakhov, S., B. Nefkens, C. Allgower, V. Bekrenev, W. Briscoe, J. Comfort, K. Craig, D. Grosnick, D. Isenhower, N. Knecht, D. Koetke, A. Koulbardis, N. Kozlenko, S. Kruglov, G. Lolos, I. Lopatin, D. Manley, R. Manweiler, A. Marus˘ić, S. McDonald, J. Olmsted, Z. Papandreou, D. Peaslee, N. Phaisangittisakul, J. Price, A. Ramirez, M. Sadler, A. Shafi, H. Spinka, T. Stanislaus, A. Starostin, H. Staudenmaier, and I. Supek. 2008. “Measurement of the Invariant-Mass Spectrum for the Two Photons from the η→π0γγ Decay”. Physical Review C. https://doi.org/10.1103/PhysRevC.78.015206.
Prakhov, S., B. Nefkens, C. Allgower, V. Bekrenev, W. Briscoe, J. Comfort, K. Craig, D. Grosnick, D. Isenhower, N. Knecht, D. Koetke, A. Koulbardis, N. Kozlenko, S. Kruglov, G. Lolos, I. Lopatin, D. Manley, R. Manweiler, A. Marus˘ić, S. McDonald, J. Olmsted, Z. Papandreou, D. Peaslee, N. Phaisangittisakul, J. Price, A. Ramirez, M. Sadler, A. Shafi, H. Spinka, T. Stanislaus, A. Starostin, H. Staudenmaier, and I. Supek. Measurement of the Invariant-Mass Spectrum for the Two Photons from the η→π0γγ Decay. Physical Review C, 1 July 2008, doi:10.1103/PhysRevC.78.015206.