Three-body final state interaction in η→3π updated
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 repr...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-08-01
|
| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317304550 |
| id |
doaj-93374016d72e427cae12357beb8ad66c |
|---|---|
| record_format |
Article |
| spelling |
doaj-93374016d72e427cae12357beb8ad66c2020-11-24T21:21:38ZengElsevierPhysics Letters B0370-26932017-08-01771497502Three-body final state interaction in η→3π updatedP. Guo0I.V. Danilkin1C. Fernández-Ramírez2V. Mathieu3A.P. Szczepaniak4Department of Physics and Engineering, California State University, Bakersfield, CA 93311, USAInstitut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg Universität, D-55099 Mainz, Germany; SSC RF ITEP, Bolshaya Cheremushkinskaya 25, 117218 Moscow, Russia; Corresponding author.Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Ciudad de México 04510, MexicoCenter for Exploration of Energy and Matter, Indiana University, Bloomington, IN 47403, USA; Physics Department, Indiana University, Bloomington, IN 47405, USACenter for Exploration of Energy and Matter, Indiana University, Bloomington, IN 47403, USA; Physics Department, Indiana University, Bloomington, IN 47405, USA; Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAIn 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.http://www.sciencedirect.com/science/article/pii/S0370269317304550 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
P. Guo I.V. Danilkin C. Fernández-Ramírez V. Mathieu A.P. Szczepaniak |
| spellingShingle |
P. Guo I.V. Danilkin C. Fernández-Ramírez V. Mathieu A.P. Szczepaniak Three-body final state interaction in η→3π updated Physics Letters B |
| author_facet |
P. Guo I.V. Danilkin C. Fernández-Ramírez V. Mathieu A.P. Szczepaniak |
| author_sort |
P. Guo |
| title |
Three-body final state interaction in η→3π updated |
| title_short |
Three-body final state interaction in η→3π updated |
| title_full |
Three-body final state interaction in η→3π updated |
| title_fullStr |
Three-body final state interaction in η→3π updated |
| title_full_unstemmed |
Three-body final state interaction in η→3π updated |
| title_sort |
three-body final state interaction in η→3π updated |
| publisher |
Elsevier |
| series |
Physics Letters B |
| issn |
0370-2693 |
| publishDate |
2017-08-01 |
| description |
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. |
| url |
http://www.sciencedirect.com/science/article/pii/S0370269317304550 |
| work_keys_str_mv |
AT pguo threebodyfinalstateinteractioninē3pupdated AT ivdanilkin threebodyfinalstateinteractioninē3pupdated AT cfernandezramirez threebodyfinalstateinteractioninē3pupdated AT vmathieu threebodyfinalstateinteractioninē3pupdated AT apszczepaniak threebodyfinalstateinteractioninē3pupdated |
| _version_ |
1725998834135334912 |