New analysis of ηπ tensor resonances measured at the COMPASS experiment

JPAC Collaboration, COMPASS Collaboration, Sergey Alexandrovich Mamon

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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
Volume779
DOIs
Publication statusPublished - 10 Apr 2018

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COMPASS (programming language)
poles
tensors
matrices
excitation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

New analysis of ηπ tensor resonances measured at the COMPASS experiment. / JPAC Collaboration; COMPASS Collaboration ; Mamon, Sergey Alexandrovich.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 779, 10.04.2018, p. 464-472.

Research output: Contribution to journalArticle

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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. Badełek 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}",
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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 - Dusaev, R. R.

AU - Levchenko, E. A.

AU - Lyubovitskij, V. E.

AU - Vasilishin, B. I.

AU - Mamon, Sergey Alexandrovich

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.

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U2 - 10.1016/j.physletb.2018.01.017

DO - 10.1016/j.physletb.2018.01.017

M3 - Article

AN - SCOPUS:85042430181

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

SN - 0370-2693

ER -