Search for the forbidden decays Ε↠3Î and Ε↠π0Î and the rare decay Ε↠π0Ï€0Î Î

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

9 Citations (Scopus)

Abstract

A new upper limit is presented for the branching ratio (BR) of Ε↠3Î. This decay is not allowed by charge-conjugation invariance. We have determined that BR(Ε⠆ 3Î)<4à 10-5. We also obtained BR(Ε⠆ Ï€0Π↠3Î)<9Ã- 10-5; this decay mode is absolutely forbidden, as it violates conservation of angular momentum. Finally, we have established that BR(Ε↠π0Ï€0Î Î)<1.2à 10-3 in a restricted diphoton-energy region. All three upper limits are at the 90% confidence level. They were obtained by using the Crystal Ball multiphoton spectrometer at the AGS and are based on the analysis of 28 million Ε mesons produced in the Ï€-p↠Εn reaction close to threshold.

Original languageEnglish (US)
Article number035212
JournalPhysical Review C - Nuclear Physics
Volume72
Issue number3
DOIs
StatePublished - Sep 2005

Fingerprint

decay
conjugation
balls
conservation
confidence
invariance
mesons
angular momentum
spectrometers
thresholds
crystals
energy

ASJC Scopus subject areas

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

Cite this

Nefkens, B. M. K., Prakhov, S., Allgower, C. E., Bekrenv, V., Briscoe, W. J., Clajus, M., ... Tippens, W. B. (2005). Search for the forbidden decays Ε↠3Î and Ε↠π0Î and the rare decay Ε↠π0Ï€0Î Î. Physical Review C - Nuclear Physics, 72(3), [035212]. https://doi.org/10.1103/PhysRevC.72.035212

Search for the forbidden decays Ε↠3Î and Ε↠π0Î and the rare decay Ε↠π0Ï€0Î Î. / Nefkens, B. M K; Prakhov, S.; Allgower, C. E.; Bekrenv, V.; Briscoe, W. J.; Clajus, M.; Comfort, J. R.; Craig, K.; Grosnick, D.; Isenhower, D.; Knecht, N.; Koetke, D.; Koulbardis, A.; Kozlenko, N.; Kruglov, S.; Lolos, G.; Lopatin, I.; Manley, D. M.; Manweiler, R.; Marusić, 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. 3, 035212, 09.2005.

Research output: Contribution to journalArticle

Nefkens, BMK, Prakhov, S, Allgower, CE, Bekrenv, V, Briscoe, WJ, Clajus, M, Comfort, JR, Craig, K, Grosnick, D, Isenhower, D, Knecht, N, Koetke, D, Koulbardis, A, Kozlenko, N, Kruglov, S, Lolos, G, Lopatin, I, Manley, DM, Manweiler, R, Marusić, 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, 'Search for the forbidden decays Ε↠3Î and Ε↠π0Î and the rare decay Ε↠π0Ï€0Î Î', Physical Review C - Nuclear Physics, vol. 72, no. 3, 035212. https://doi.org/10.1103/PhysRevC.72.035212
Nefkens, B. M K ; Prakhov, S. ; Allgower, C. E. ; Bekrenv, V. ; Briscoe, W. J. ; Clajus, M. ; Comfort, J. R. ; Craig, K. ; Grosnick, D. ; Isenhower, D. ; Knecht, N. ; Koetke, D. ; Koulbardis, A. ; Kozlenko, N. ; Kruglov, S. ; Lolos, G. ; Lopatin, I. ; Manley, D. M. ; Manweiler, R. ; Marusić, 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. / Search for the forbidden decays Ε↠3Î and Ε↠π0Î and the rare decay Ε↠π0Ï€0Î Î. In: Physical Review C - Nuclear Physics. 2005 ; Vol. 72, No. 3.
@article{2bba91a7082d4cd8aada7feb38c4f19f,
title = "Search for the forbidden decays {\^I}•{\^a}† 3{\^I} and {\^I}•{\^a}† {\"I}€0{\^I} and the rare decay {\^I}•{\^a}† {\"I}€0{\"I}€0{\^I} {\^I}",
abstract = "A new upper limit is presented for the branching ratio (BR) of {\^I}•{\^a}† 3{\^I}. This decay is not allowed by charge-conjugation invariance. We have determined that BR({\^I}•{\^a} † 3{\^I})<4{\~A} 10-5. We also obtained BR({\^I}•{\^a} † {\"I}€0{\^I} {\^a}† 3{\^I})<9{\~A}- 10-5; this decay mode is absolutely forbidden, as it violates conservation of angular momentum. Finally, we have established that BR({\^I}•{\^a}† {\"I}€0{\"I}€0{\^I} {\^I})<1.2{\~A} 10-3 in a restricted diphoton-energy region. All three upper limits are at the 90{\%} confidence level. They were obtained by using the Crystal Ball multiphoton spectrometer at the AGS and are based on the analysis of 28 million {\^I}• mesons produced in the {\"I}€-p{\^a}† {\^I}•n reaction close to threshold.",
author = "Nefkens, {B. M K} and S. Prakhov and Allgower, {C. E.} and V. Bekrenv and Briscoe, {W. J.} and M. Clajus and Comfort, {J. R.} and K. Craig and D. Grosnick and D. Isenhower and N. Knecht and D. Koetke and A. Koulbardis and N. Kozlenko and S. Kruglov and G. Lolos and I. Lopatin and Manley, {D. M.} and R. Manweiler and A. Marusić and S. McDonald and J. Olmsted and Z. Papandreou and D. Peaslee and N. Phaisangittisakul and Price, {J. W.} and Ramirez, {A. F.} and M. Sadler and A. Shafi and H. Spinka and Stanislaus, {T. D S} and A. Starostin and Staudenmaier, {H. M.} and I. Supek and Tippens, {W. B.}",
year = "2005",
month = "9",
doi = "10.1103/PhysRevC.72.035212",
language = "English (US)",
volume = "72",
journal = "Physical Review C - Nuclear Physics",
issn = "0556-2813",
publisher = "American Physical Society",
number = "3",

}

TY - JOUR

T1 - Search for the forbidden decays Ε↠3Î and Ε↠π0Î and the rare decay Ε↠π0Ï€0Î Î

AU - Nefkens, B. M K

AU - Prakhov, S.

AU - Allgower, C. E.

AU - Bekrenv, V.

AU - Briscoe, W. J.

AU - Clajus, M.

AU - Comfort, J. R.

AU - Craig, K.

AU - Grosnick, D.

AU - Isenhower, D.

AU - Knecht, N.

AU - Koetke, D.

AU - Koulbardis, A.

AU - Kozlenko, N.

AU - Kruglov, S.

AU - Lolos, G.

AU - Lopatin, I.

AU - Manley, D. M.

AU - Manweiler, R.

AU - Marusić, A.

AU - McDonald, S.

AU - Olmsted, J.

AU - Papandreou, Z.

AU - Peaslee, D.

AU - Phaisangittisakul, N.

AU - Price, J. W.

AU - Ramirez, A. F.

AU - Sadler, M.

AU - Shafi, A.

AU - Spinka, H.

AU - Stanislaus, T. D S

AU - Starostin, A.

AU - Staudenmaier, H. M.

AU - Supek, I.

AU - Tippens, W. B.

PY - 2005/9

Y1 - 2005/9

N2 - A new upper limit is presented for the branching ratio (BR) of Ε↠3Î. This decay is not allowed by charge-conjugation invariance. We have determined that BR(Ε⠆ 3Î)<4à 10-5. We also obtained BR(Ε⠆ Ï€0Π↠3Î)<9Ã- 10-5; this decay mode is absolutely forbidden, as it violates conservation of angular momentum. Finally, we have established that BR(Ε↠π0Ï€0Î Î)<1.2à 10-3 in a restricted diphoton-energy region. All three upper limits are at the 90% confidence level. They were obtained by using the Crystal Ball multiphoton spectrometer at the AGS and are based on the analysis of 28 million Ε mesons produced in the Ï€-p↠Εn reaction close to threshold.

AB - A new upper limit is presented for the branching ratio (BR) of Ε↠3Î. This decay is not allowed by charge-conjugation invariance. We have determined that BR(Ε⠆ 3Î)<4à 10-5. We also obtained BR(Ε⠆ Ï€0Π↠3Î)<9Ã- 10-5; this decay mode is absolutely forbidden, as it violates conservation of angular momentum. Finally, we have established that BR(Ε↠π0Ï€0Î Î)<1.2à 10-3 in a restricted diphoton-energy region. All three upper limits are at the 90% confidence level. They were obtained by using the Crystal Ball multiphoton spectrometer at the AGS and are based on the analysis of 28 million Ε mesons produced in the Ï€-p↠Εn reaction close to threshold.

UR - http://www.scopus.com/inward/record.url?scp=28844442231&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=28844442231&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.72.035212

DO - 10.1103/PhysRevC.72.035212

M3 - Article

AN - SCOPUS:28844442231

VL - 72

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 3

M1 - 035212

ER -