6533b871fe1ef96bd12d11b2
RESEARCH PRODUCT
Three-body final state interaction in η→ 3π updated
Peng GuoAdam P. SzczepaniakAdam P. SzczepaniakVincent MathieuI. V. DanilkinI. V. DanilkinCésar Fernández-ramírezsubject
PhysicsQuarkNuclear and High Energy PhysicsParticle physicsUnitarity010308 nuclear & particles physicsDalitz plotValue (computer science)State (functional analysis)01 natural scienceslcsh:QC1-999Nuclear physicsPionDistribution (mathematics)0103 physical sciences010306 general physicsDispersion (water waves)lcsh:Physicsdescription
In view of the recent high-statistic KLOE data for the η→π+π−π0 decay, a new determination of the quark mass double ratio has been done. Our approach relies on a dispersive model that takes into account rescattering effects between three pions via subenergy unitarity. The latter is essential to reproduce the Dalitz plot distribution. A simultaneous description of the KLOE and WASA-at-COSY data is achieved in terms of just two real parameters. From a global fit, we determine Q=21.6±1.1. The predicted slope parameter for the neutral channel α=−0.025±0.004 is in reasonable agreement with the PDG average value.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-08-01 | Physics Letters B |