New analysis of ηπ tensor resonances measured at the COMPASS experiment

JPAC Collaboration; COMPASS Collaboration

doi:10.1016/j.physletb.2018.01.017

New analysis of ηπ tensor resonances measured at the COMPASS experiment

JPAC Collaboration
, COMPASS Collaboration

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

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.

Lingua originale	Inglese
pagine (da-a)	464-472
Numero di pagine	9
Rivista	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	779
DOI	https://doi.org/10.1016/j.physletb.2018.01.017
Stato di pubblicazione	Pubblicato - 10 apr 2018
Pubblicato esternamente	Sì

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10.1016/j.physletb.2018.01.017

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@article{a0514427cb8042e782edb0bab0acdbe4,

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 \{Dalla Torre\}, S. and Dasgupta, \{S. S.\} and S. Dasgupta and Denisov, \{O. Yu\}",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s)",

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 BV",

}

TY - JOUR

T1 - New analysis of ηπ tensor resonances measured at the COMPASS experiment

AU - JPAC Collaboration

AU - COMPASS Collaboration

AU - Jackura, A.

AU - Fernández-Ramírez, C.

AU - Mikhasenko, M.

AU - Pilloni, A.

AU - Mathieu, V.

AU - Nys, J.

AU - Pauk, V.

AU - Szczepaniak, A. P.

AU - Fox, G.

AU - Aghasyan, M.

AU - Akhunzyanov, R.

AU - Alexeev, M. G.

AU - Alexeev, G. D.

AU - Amoroso, A.

AU - Andrieux, V.

AU - Anfimov, N. V.

AU - Anosov, V.

AU - Antoshkin, A.

AU - Augsten, K.

AU - Augustyniak, W.

AU - Austregesilo, A.

AU - Azevedo, C. D.R.

AU - Badełek, B.

AU - Balestra, F.

AU - Ball, M.

AU - Barth, J.

AU - Beck, R.

AU - Bedfer, Y.

AU - Bernhard, J.

AU - Bicker, K.

AU - Bielert, E. R.

AU - Birsa, R.

AU - Bodlak, M.

AU - Bordalo, P.

AU - Bradamante, F.

AU - Bressan, A.

AU - Büchele, M.

AU - Burtsev, V. E.

AU - Chang, W. C.

AU - Chatterjee, C.

AU - Chiosso, M.

AU - Choi, I.

AU - Chumakov, A. G.

AU - Chung, S. U.

AU - Cicuttin, A.

AU - Crespo, M. L.

AU - Dalla Torre, S.

AU - Dasgupta, S. S.

AU - Dasgupta, S.

AU - Denisov, O. Yu

PY - 2018/4/10

Y1 - 2018/4/10

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85042430181

U2 - 10.1016/j.physletb.2018.01.017

DO - 10.1016/j.physletb.2018.01.017

M3 - Article

SN - 0370-2693

VL - 779

SP - 464

EP - 472

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

New analysis of ηπ tensor resonances measured at the COMPASS experiment

Abstract

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