Scott Teige's Link - acceptance plots and the data:
http://anthrax.physics.indiana.edu/~teige/dalitzd/eta_etap.html
From the PDG-98: full listing on
the eta and eta'
are available here in PDF format.
This analysis is being carried out by Scott Teige. We also have had
discussions on this with Barry Holstein and Adam Szczepaniak. On
Monday, Aug 10, Eulogio Osat will be at IU (visiting A.S.) and we'll
have his input as well.
The structure of the Dalitz plot for the decays:
These decays are of interest to chiral perturbation theorists - a
sensitive probe for the breaking of chiral symmetry by the quark
masses. The goal is to measure the alpha parameter.
For the eta decays E852 represents the first time that the neutral
and charged modes are measured in the same experiment. The eta'
decays (charged mode) world sample is 1,600 events. E852 has 17,500
in the '95 data. The GAMS sample on the neutral eta' decay is 6,500
events and the E852 sample is 18,000 events.
MC samples for acceptance studies are nearly complete. Systematics
studies as a function of missing-mass-sqaured, chisquared and |t |
have been carried out.
References:
- Crystal Barrel eta -> 3pio (1998) [Eta_to_3pi0.ps.gz]
- Crystal Barrel eta -> pi+ pi- pio (1998) [Eta_to_pipm0.ps.gz]
- GAMS eta -> 3pio: Alde et al, Z. Phys C25 (1984) 225
- FINAL STATE INTERACTIONS AND KHURI-TREIMAN EQUATIONS IN ETA
--> 3 PI DECAYS. By J. Kambor (Orsay, IPN), C. Wiesendanger
(Zurich U. & Dublin Inst.), D. Wyler (Zurich U.). ZU-TH-41-94,
Sep 1995. 55pp. Published in Nucl.Phys.B465:215-266,1996
http://xxx.lanl.gov/ps/hep-ph/9509374
- ELECTROMAGNETIC CORRECTIONS TO THE DECAYS ETA --> 3 PI. By
R. Baur (Zurich U.), J. Kambor (Orsay, IPN), D. Wyler (Zurich U.).
ZU-TH-16-95, Oct 1995. 15pp. Published in
Nucl.Phys.B460:127-142,1996
http://xxx.lanl.gov/ps/hep-ph/9510396
- DISPERSIVE ANALYSIS OF THE DECAY ETA ---> 3 PI. By A.V.
Anisovich (St. Petersburg, INP), H. Leutwyler (Bern U. &
CERN). BUTP-95-2, Jan 1996. 14pp. Published in
Phys.Lett.B375:335-342,1996
http://xxx.lanl.gov/ps/hep-ph/9601237
- CHIRAL ANOMALY AND ETA - ETA-PRIME MIXING.By E.P. Venugopal,
Barry R. Holstein (Massachusetts U., Amherst). Oct 1998. 12pp.
Published in Phys.Rev.D57:4397-4402,1998
http://xxx.lanl.gov/ps/hep-ph/9710382
Updated: August 15, 1998