@article{2cbbc2ea58d94494a61246245cbc024a,

title = "New analysis of ηπ tensor resonances measured at the COMPASS experiment",

abstract = "We present a new amplitude analysis of the ηπ D-wave in the reaction π−p→ηπ−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 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.",

author = "{JPAC Collaboration} and {COMPASS Collaboration} and A. Jackura and C. Fern{\'a}ndez-Ram{\'i}rez and M. Mikhasenko and A. Pilloni and V. Mathieu and J. Nys and V. Pauk and Szczepaniak, {A. P.} and G. Fox and M. Aghasyan and R. Akhunzyanov and Alexeev, {M. G.} and Alexeev, {G. D.} and A. Amoroso and V. Andrieux and Anfimov, {N. V.} and V. Anosov and A. Antoshkin and K. Augsten and W. Augustyniak and A. Austregesilo and Azevedo, {C. D.R.} and B. Bade{\l}ek and F. Balestra and M. Ball and J. Barth and R. Beck and Y. Bedfer and J. Bernhard and K. Bicker and Bielert, {E. R.} and R. Birsa and M. Bodlak and P. Bordalo and F. Bradamante and A. Bressan and M. B{\"u}chele and Burtsev, {V. E.} and Chang, {W. C.} and C. Chatterjee and M. Chiosso and I. Choi and Chumakov, {A. G.} and Chung, {S. U.} and A. Cicuttin and Crespo, {M. L.} and Dusaev, {R. R.} and Levchenko, {E. A.} and Lyubovitskij, {V. E.} and Vasilishin, {B. I.} and Mamon, {Sergey Alexandrovich}",

note = "Funding Information: Supported by the DFG Research Training Group Programmes 1102 and 2044 (Germany). Editor: M. Doser ",

year = "2018",

month = apr,

day = "10",

doi = "10.1016/j.physletb.2018.01.017",

language = "English",

volume = "779",

pages = "464--472",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}