Measurement of the branching ratio for η→π0γγ decay

S. Prakhov, B. M K Nefkens, C. E. Allgower, V. Bekrenev, W. J. Briscoe, M. Clajus, J. R. Comfort, K. Craig, D. Grosnick, G. M. Huber, D. Isenhower, N. Knecht, D. Koetke, A. Koulbardis, N. Kozlenko, S. Kruglov, G. Lolos, I. Lopatin, D. M. Manley, R. ManweilerA. Maruić, 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, W. B. Tippens

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The branching ratio (BR) for the rare decay η→π0γγ was measured with the Crystal Ball multiphoton spectrometer. The result, BR(η→π0γγ)=(3.5±0.7stat±0.6syst) ×10-4, is in agreement with calculations of chiral perturbation theory to third order. We have used a sample of 28 million η mesons produced at the BNL Alternating Gradient Synchrotron using the π-p→ηn reaction close to threshold. We detail the intricate extraction of the signal, which has about 1.6 thousand η→π0γγ events, from the overwhelming background of η→3π0 decays and from the π-p→π0π0n reaction.

Original languageEnglish (US)
Article number025201
JournalPhysical Review C - Nuclear Physics
Volume72
Issue number2
DOIs
StatePublished - Aug 2005

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decay
balls
synchrotrons
mesons
perturbation theory
spectrometers
gradients
thresholds
crystals

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Prakhov, S., Nefkens, B. M. K., Allgower, C. E., Bekrenev, V., Briscoe, W. J., Clajus, M., ... Tippens, W. B. (2005). Measurement of the branching ratio for η→π0γγ decay. Physical Review C - Nuclear Physics, 72(2), [025201]. https://doi.org/10.1103/PhysRevC.72.025201

Measurement of the branching ratio for η→π0γγ decay. / Prakhov, S.; Nefkens, B. M K; Allgower, C. E.; Bekrenev, V.; Briscoe, W. J.; Clajus, M.; Comfort, J. R.; Craig, K.; Grosnick, D.; Huber, G. M.; Isenhower, D.; Knecht, N.; Koetke, D.; Koulbardis, A.; Kozlenko, N.; Kruglov, S.; Lolos, G.; Lopatin, I.; Manley, D. M.; Manweiler, R.; Maruić, A.; McDonald, S.; Olmsted, J.; Papandreou, Z.; Peaslee, D.; Phaisangittisakul, N.; Price, J. W.; Ramirez, A. F.; Sadler, M.; Shafi, A.; Spinka, H.; Stanislaus, T. D S; Starostin, A.; Staudenmaier, H. M.; Supek, I.; Tippens, W. B.

In: Physical Review C - Nuclear Physics, Vol. 72, No. 2, 025201, 08.2005.

Research output: Contribution to journalArticle

Prakhov, S, Nefkens, BMK, Allgower, CE, Bekrenev, V, Briscoe, WJ, Clajus, M, Comfort, JR, Craig, K, Grosnick, D, Huber, GM, Isenhower, D, Knecht, N, Koetke, D, Koulbardis, A, Kozlenko, N, Kruglov, S, Lolos, G, Lopatin, I, Manley, DM, Manweiler, R, Maruić, A, McDonald, S, Olmsted, J, Papandreou, Z, Peaslee, D, Phaisangittisakul, N, Price, JW, Ramirez, AF, Sadler, M, Shafi, A, Spinka, H, Stanislaus, TDS, Starostin, A, Staudenmaier, HM, Supek, I & Tippens, WB 2005, 'Measurement of the branching ratio for η→π0γγ decay', Physical Review C - Nuclear Physics, vol. 72, no. 2, 025201. https://doi.org/10.1103/PhysRevC.72.025201
Prakhov S, Nefkens BMK, Allgower CE, Bekrenev V, Briscoe WJ, Clajus M et al. Measurement of the branching ratio for η→π0γγ decay. Physical Review C - Nuclear Physics. 2005 Aug;72(2). 025201. https://doi.org/10.1103/PhysRevC.72.025201
Prakhov, S. ; Nefkens, B. M K ; Allgower, C. E. ; Bekrenev, V. ; Briscoe, W. J. ; Clajus, M. ; Comfort, J. R. ; Craig, K. ; Grosnick, D. ; Huber, G. M. ; Isenhower, D. ; Knecht, N. ; Koetke, D. ; Koulbardis, A. ; Kozlenko, N. ; Kruglov, S. ; Lolos, G. ; Lopatin, I. ; Manley, D. M. ; Manweiler, R. ; Maruić, A. ; McDonald, S. ; Olmsted, J. ; Papandreou, Z. ; Peaslee, D. ; Phaisangittisakul, N. ; Price, J. W. ; Ramirez, A. F. ; Sadler, M. ; Shafi, A. ; Spinka, H. ; Stanislaus, T. D S ; Starostin, A. ; Staudenmaier, H. M. ; Supek, I. ; Tippens, W. B. / Measurement of the branching ratio for η→π0γγ decay. In: Physical Review C - Nuclear Physics. 2005 ; Vol. 72, No. 2.
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AU - Comfort, J. R.

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AU - Olmsted, J.

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AU - Phaisangittisakul, N.

AU - Price, J. W.

AU - Ramirez, A. F.

AU - Sadler, M.

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AU - Stanislaus, T. D S

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