Three-body final state interaction in η → 3 π updated
Abstract
In view of the recent high-statistic KLOE-2 data for the $$\eta \to \pi^+ \pi^- \pi^0$$ decay, a new determination of the quark mass double ratio has been done. Our approach relies on a unitary dispersive model that takes into account rescattering effects between three pions. The latter is essential to reproduce the Dalitz plot distribution. A simultaneous description of the KLOE-2 and WASA-at-COSY data is achieved in terms of just two real parameters. From a global fit, we determine $$Q=21.6 \pm 0.4$$. Here, the predicted slope parameter for the neutral channel $$\alpha=-0.025\pm 0.004$$ is in a reasonable agreement with the PDG average value.
- Authors:
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1361560
- Alternate Identifier(s):
- OSTI ID: 1373563
- Report Number(s):
- JLAB-THY-16-2302; DOE/OR/23177-3887
Journal ID: ISSN 0370-2693; S0370269317304550; PII: S0370269317304550
- Grant/Contract Number:
- AC05-06OR23177; FG0287ER40365; PHY-1415459; PHY-1205019; 1044; 251817
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters. B
- Additional Journal Information:
- Journal Name: Physics Letters. B; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Guo, P., Danilkin, I. V., Fernández-Ramírez, C., Mathieu, V., and Szczepaniak, A. P. Three-body final state interaction in η → 3 π updated. Netherlands: N. p., 2017.
Web. doi:10.1016/j.physletb.2017.05.092.
Guo, P., Danilkin, I. V., Fernández-Ramírez, C., Mathieu, V., & Szczepaniak, A. P. Three-body final state interaction in η → 3 π updated. Netherlands. https://doi.org/10.1016/j.physletb.2017.05.092
Guo, P., Danilkin, I. V., Fernández-Ramírez, C., Mathieu, V., and Szczepaniak, A. P. Wed .
"Three-body final state interaction in η → 3 π updated". Netherlands. https://doi.org/10.1016/j.physletb.2017.05.092.
@article{osti_1361560,
title = {Three-body final state interaction in η → 3 π updated},
author = {Guo, P. and Danilkin, I. V. and Fernández-Ramírez, C. and Mathieu, V. and Szczepaniak, A. P.},
abstractNote = {In view of the recent high-statistic KLOE-2 data for the $\eta \to \pi^+ \pi^- \pi^0$ decay, a new determination of the quark mass double ratio has been done. Our approach relies on a unitary dispersive model that takes into account rescattering effects between three pions. The latter is essential to reproduce the Dalitz plot distribution. A simultaneous description of the KLOE-2 and WASA-at-COSY data is achieved in terms of just two real parameters. From a global fit, we determine $Q=21.6 \pm 0.4$. Here, the predicted slope parameter for the neutral channel $\alpha=-0.025\pm 0.004$ is in a reasonable agreement with the PDG average value.},
doi = {10.1016/j.physletb.2017.05.092},
journal = {Physics Letters. B},
number = ,
volume = ,
place = {Netherlands},
year = {Wed Jun 07 00:00:00 EDT 2017},
month = {Wed Jun 07 00:00:00 EDT 2017}
}
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https://doi.org/10.1016/j.physletb.2017.05.092
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Cited by: 38 works
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