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Title: New analysis of ηπ tensor resonances measured at the COMPASS experiment

Journal Article · · Physics Letters. B
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We present a new amplitude analysis of the ηπ D-wave in the reaction π - pη π - p 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 a 2 (1320) and the excited a 2 ' (1700) , and perform a comprehensive analysis of their pole positions. For the mass and width of the a 2 we find M=(1307±1±6) MeV and Γ=(112±1±8) MeV, and for the excited state a 2 ' we obtain M=(1720±10±60) MeV and Γ=(280±10±70) MeV, respectively.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
JPAC Collaboration; COMPASS Collaboration
Grant/Contract Number:
AC05-06OR23177
OSTI ID:
1437839
Alternate ID(s):
OSTI ID: 1433804
Report Number(s):
JLAB-THY-17-2468; DOE/OR/23177-4137; arXiv:1707.02848; PII: S037026931830025X; TRN: US1802543
Journal Information:
Physics Letters. B, Vol. 779; ISSN 0370-2693
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Figures / Tables (7)