Resonances of the systems $\pi^- \eta$ and $\pi^- \eta'$ in the reactions $\pi^- p --> \pi^- \eta p$ and $\pi^- p --> \pi^- \eta' p$ at COMPASS

We describe partial-wave analyses of the systems \pi-\eta and \pi-\eta' produced in interactions of a \pi- beam (190 GeV/c) with a liquid hydrogen target. The data were recorded during the 2008 COMPASS run, where a slow recoiling proton (|t|>0.1 GeV^2) was required by the trigger. We compare...

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Detalles Bibliográficos
Autores principales: Schluter, Tobias, Ryabchikov, Dmitri, Dunnweber, Wolfgang, Faessler, Martin
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.22323/1.157.0074
http://cds.cern.ch/record/1460021
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author Schluter, Tobias
Ryabchikov, Dmitri
Dunnweber, Wolfgang
Faessler, Martin
author_facet Schluter, Tobias
Ryabchikov, Dmitri
Dunnweber, Wolfgang
Faessler, Martin
author_sort Schluter, Tobias
collection CERN
description We describe partial-wave analyses of the systems \pi-\eta and \pi-\eta' produced in interactions of a \pi- beam (190 GeV/c) with a liquid hydrogen target. The data were recorded during the 2008 COMPASS run, where a slow recoiling proton (|t|>0.1 GeV^2) was required by the trigger. We compare analyses of the \pi-\eta and \pi-\eta' data. Significant contributions can be attributed to the resonances a_2(1320), observed in the D_+-wave, and a_4(2040), observed in the G_+-wave. Between the two systems, we find similar compositions of the even partial waves D_+ and G_+ after taking phase-space factors into account, but a much enhanced P_+-wave in \pi-\eta'. Relative phase-differences indicate a large incoherent contribution of in the P_+-wave of the \eta'\pi- system, but other interpretations are not excluded. The known resonances a_2(1320), a_4(2040) and their parameters could be extracted from the data; their branchings are found to roughly agree with predictions from \eta\eta' mixing.
id cern-1460021
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
record_format invenio
spelling cern-14600212023-03-14T17:27:55Zdoi:10.22323/1.157.0074http://cds.cern.ch/record/1460021engSchluter, TobiasRyabchikov, DmitriDunnweber, WolfgangFaessler, MartinResonances of the systems $\pi^- \eta$ and $\pi^- \eta'$ in the reactions $\pi^- p --> \pi^- \eta p$ and $\pi^- p --> \pi^- \eta' p$ at COMPASSParticle Physics - ExperimentWe describe partial-wave analyses of the systems \pi-\eta and \pi-\eta' produced in interactions of a \pi- beam (190 GeV/c) with a liquid hydrogen target. The data were recorded during the 2008 COMPASS run, where a slow recoiling proton (|t|>0.1 GeV^2) was required by the trigger. We compare analyses of the \pi-\eta and \pi-\eta' data. Significant contributions can be attributed to the resonances a_2(1320), observed in the D_+-wave, and a_4(2040), observed in the G_+-wave. Between the two systems, we find similar compositions of the even partial waves D_+ and G_+ after taking phase-space factors into account, but a much enhanced P_+-wave in \pi-\eta'. Relative phase-differences indicate a large incoherent contribution of in the P_+-wave of the \eta'\pi- system, but other interpretations are not excluded. The known resonances a_2(1320), a_4(2040) and their parameters could be extracted from the data; their branchings are found to roughly agree with predictions from \eta\eta' mixing.We describe partial-wave analyses of the systems \pi-\eta and \pi-\eta' produced in interactions of a \pi- beam (190 GeV/c) with a liquid hydrogen target. The data were recorded during the 2008 COMPASS run, where a slow recoiling proton (|t|>0.1 GeV^2) was required by the trigger. We compare analyses of the \pi-\eta and \pi-\eta' data. Significant contributions can be attributed to the resonances a_2(1320), observed in the D_+-wave, and a_4(2040), observed in the G_+-wave. Between the two systems, we find similar compositions of the even partial waves D_+ and G_+ after taking phase-space factors into account, but a much enhanced P_+-wave in \pi-\eta'. Relative phase-differences indicate a large incoherent contribution of in the P_+-wave of the \eta'\pi- system, but other interpretations are not excluded. The known resonances a_2(1320), a_4(2040) and their parameters could be extracted from the data; their branchings are found to roughly agree with predictions from \eta\eta' mixing.arXiv:1207.1076oai:cds.cern.ch:14600212012-07-05
spellingShingle Particle Physics - Experiment
Schluter, Tobias
Ryabchikov, Dmitri
Dunnweber, Wolfgang
Faessler, Martin
Resonances of the systems $\pi^- \eta$ and $\pi^- \eta'$ in the reactions $\pi^- p --> \pi^- \eta p$ and $\pi^- p --> \pi^- \eta' p$ at COMPASS
title Resonances of the systems $\pi^- \eta$ and $\pi^- \eta'$ in the reactions $\pi^- p --> \pi^- \eta p$ and $\pi^- p --> \pi^- \eta' p$ at COMPASS
title_full Resonances of the systems $\pi^- \eta$ and $\pi^- \eta'$ in the reactions $\pi^- p --> \pi^- \eta p$ and $\pi^- p --> \pi^- \eta' p$ at COMPASS
title_fullStr Resonances of the systems $\pi^- \eta$ and $\pi^- \eta'$ in the reactions $\pi^- p --> \pi^- \eta p$ and $\pi^- p --> \pi^- \eta' p$ at COMPASS
title_full_unstemmed Resonances of the systems $\pi^- \eta$ and $\pi^- \eta'$ in the reactions $\pi^- p --> \pi^- \eta p$ and $\pi^- p --> \pi^- \eta' p$ at COMPASS
title_short Resonances of the systems $\pi^- \eta$ and $\pi^- \eta'$ in the reactions $\pi^- p --> \pi^- \eta p$ and $\pi^- p --> \pi^- \eta' p$ at COMPASS
title_sort resonances of the systems $\pi^- \eta$ and $\pi^- \eta'$ in the reactions $\pi^- p --> \pi^- \eta p$ and $\pi^- p --> \pi^- \eta' p$ at compass
topic Particle Physics - Experiment
url https://dx.doi.org/10.22323/1.157.0074
http://cds.cern.ch/record/1460021
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AT ryabchikovdmitri resonancesofthesystemspietaandpietainthereactionspippietapandpippietapatcompass
AT dunnweberwolfgang resonancesofthesystemspietaandpietainthereactionspippietapandpippietapatcompass
AT faesslermartin resonancesofthesystemspietaandpietainthereactionspippietapandpippietapatcompass

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