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Title: 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) (SC-26)
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. doi: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. doi: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 = {2017},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2017.05.092

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Cited by: 15 works
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Works referencing / citing this record:

Khuri–Treiman equations for $$\pi \pi $$ π π scattering
journal, July 2018


Constraints on low energy QCD parameters from $$\eta \rightarrow 3\pi $$ η → 3 π and $$\pi \pi $$ π π scattering
journal, March 2018


Khuri–Treiman equations for $$\pi \pi $$ π π scattering
journal, July 2018