STI Publications - View Publication Form #13728
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Publication Information
| Title | Three-body Final State Interaction in eta to 3pi | ||||
| Abstract | We present an unitary dispersive model for the $\eta \to 3 \pi$ decay process based upon the Khuri-Treiman equations which are solved by means of the Pasquier inversion method. The description of the hadronic final-state interactions for the $\eta \to 3\pi$ decay is essential to reproduce the available data and to understand the existing discrepancies between Dalitz plot parameters from experiment and chiral perturbation theory. Our approach incorporates substraction constants that are fixed by fitting the recent high-statistics WASA-at-COSY data for $\eta \to \pi^+ \pi^- \pi^0$. Based on the parameters obtained we predict the slope parameter for the neutral channel to be $\alpha=-0.022\pm 0.004$. Through matching to next-to-leading order chiral perturbation theory we estimate the quark mass double ratio to be $Q=21.4 \pm 0.4$. | ||||
| Author(s) | Peng Guo, Igor Danilkin, Diane Schott, Cesar FERNANDEZ RAMIREZ, Vincent Mathieu, Adam Szczepaniak | ||||
| Publication Date | September 2015 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | |||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review D |
| Refereed | Yes |
| Volume | 92 |
| Issue | 05 |
| Page(s) | 054016 |
Attachments/Datasets/DOI Link
| Document(s) |
Peng_eta_3pion_final_21.pdf
(STI Document)
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| DOI Link | |
| Dataset(s) | (none) |
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