Measurement of the decay distribution of eta'->pi(+)pi(-)gamma and evidence for the box anomaly

被引:50
作者
Abele, A
Adomeit, J
Amsler, C
Baker, CA
Barnett, BM
Batty, CJ
Benayoun, M
Berdoz, A
Beuchert, K
Bischoff, S
Blum, P
Braune, K
Brose, J
Bugg, DV
Case, T
Cooper, A
Cramer, O
Crowe, KM
Degener, T
Djaoshvili, N
vonDombrowski, S
Doser, M
Dunnweber, W
Engelhardt, D
Faessler, MA
Giarritta, P
Hackmann, R
Haddock, RP
Heinsius, FH
Heinzelmann, M
Herz, M
Hessey, NP
Hidas, P
Hodd, C
Holtzhaussen, C
Jamnik, D
Kalinowsky, H
Kalteyer, B
Kammle, B
Kammel, P
Kiel, T
Kisiel, J
Klempt, E
Koch, H
Kolo, C
Kunze, M
Lakata, M
Landua, R
Ludemann, J
Matthay, H
机构
[1] RUHR UNIV BOCHUM,D-44780 BOCHUM,GERMANY
[2] UNIV BONN,D-53115 BONN,GERMANY
[3] HUNGARIAN ACAD SCI,H-1525 BUDAPEST,HUNGARY
[4] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND
[5] CERN,CH-1211 GENEVA 4,SWITZERLAND
[6] UNIV HAMBURG,D-76021 HAMBURG,GERMANY
[7] UNIV KARLSRUHE,D-76021 KARLSRUHE,GERMANY
[8] UNIV LONDON QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND
[9] UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024
[10] UNIV MAINZ,D-55099 MAINZ,GERMANY
[11] UNIV MUNICH,D-80333 MUNICH,GERMANY
[12] CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213
[13] CTR RECH NUCL,F-67037 STRASBOURG,FRANCE
[14] UNIV ZURICH,CH-8057 ZURICH,SWITZERLAND
[15] UNIV PARIS 06,LPNHE,F-75252 PARIS,FRANCE
关键词
D O I
10.1016/S0370-2693(97)00479-6
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The distribution of m(pi(+)pi(-)) in the decay eta' --> pi(+)pi(-)gamma has been measured with the Crystal Barrel detector. The results are based on a total of 7392 observed eta' decays. The box anomaly constant is extracted from this and its value is found to agree well with theoretical expectations. The pseudoscalar nonet parameters (f(1), f(8) and theta(PS)) are determined. Finally, we find that there is a problem of consistency between QCD and the standard VDM assumption. (C) 1997 Published by Elsevier Science B.V.
引用
收藏
页码:195 / 206
页数:12
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