New analysis of ηπ tensor resonances measured at the COMPASS experiment

JPAC Collaboration, COMPASS Collaboration

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We present a new amplitude analysis of the ηπ D-wave in the reaction πp→ηπp measured by COMPASS. Employing an analytical model based on the principles of the relativistic S-matrix, we find two resonances that can be identified with the a2(1320) and the excited a2 (1700), and perform a comprehensive analysis of their pole positions. For the mass and width of the a2 we find M=(1307±1±6) MeV and Γ=(112±1±8) MeV, and for the excited state a2 we obtain M=(1720±10±60) MeV and Γ=(280±10±70) MeV, respectively.

Original languageEnglish
Pages (from-to)464-472
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - 10 Apr 2018


FundersFunder number
National Science Foundation1415459
National Science Foundation
Office of Science
California Department of Fish and Wildlife
Indiana University
Seventh Framework Programme283286
Seventh Framework Programme
University of South Alabama
Institute of Physics
Japan Society for the Promotion of Science18002006, 17K05469, 20540299, 26247032, 18540281
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Fonds Wetenschappelijk Onderzoek
Consejo Nacional de Ciencia y Tecnología251817
Consejo Nacional de Ciencia y Tecnología
Ministry of Education, Youth and ScienceLG13031
Ministry of Education, Youth and Science
Israel Academy of Sciences and Humanities
Narodowym Centrum Nauki2015/18/M/ST2/00550
Narodowym Centrum Nauki
Seventh Framework Programme
Universidad Nacional Autónoma de MéxicoIA101717, DE-FG0287ER40365, DE-AC05-06OR23177
Universidad Nacional Autónoma de México
Bundesministerium für Bildung und Frauen
Fundació Catalana de Trasplantament123600/2011, CERN/FP 116376/2010, CERN/FIS-NUC/0017/2015
Fundació Catalana de Trasplantament


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