Study of $\pi^{-}p\rightarrow\pi^{-}\eta(\eta) p$ at 190 GeV with COMPASS

The COMPASS experiment at CERN studies diffractively produced states in the light quark sector with unprecedented statistics. The observation of $f_{0}$(1500)/ $f′_{2}$ (1525) decaying to $\eta\eta$ in 2008 data with incoming negative pion beam at 190 GeV/c poses the question whether it is produced...

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Detalles Bibliográficos
Autores principales: Schlüter, T, Uman, I
Lenguaje:eng
Publicado: 2010
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1063/1.3483381
http://cds.cern.ch/record/1495688
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author Schlüter, T
Uman, I
author_facet Schlüter, T
Uman, I
author_sort Schlüter, T
collection CERN
description The COMPASS experiment at CERN studies diffractively produced states in the light quark sector with unprecedented statistics. The observation of $f_{0}$(1500)/ $f′_{2}$ (1525) decaying to $\eta\eta$ in 2008 data with incoming negative pion beam at 190 GeV/c poses the question whether it is produced centrally or formed by the decay of a heavier diffractively produced $\pi_{1}$(1800)$/\pi_{2}$(1880). To decide, a dedicated amplitude analysis which includes different production mechanisms is formulated and compared with one which was used to fit centrally produced resonances including $f_{0}$(1500) by the WA102 experiment. Unbinned mass-dependent log-likelihood fitting methods may serve to solve the ambiguities which are present in binned, mass-independent partial wave analyses.
id cern-1495688
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
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spelling cern-14956882019-09-30T06:29:59Zdoi:10.1063/1.3483381http://cds.cern.ch/record/1495688engSchlüter, TUman, IStudy of $\pi^{-}p\rightarrow\pi^{-}\eta(\eta) p$ at 190 GeV with COMPASSParticle Physics - ExperimentThe COMPASS experiment at CERN studies diffractively produced states in the light quark sector with unprecedented statistics. The observation of $f_{0}$(1500)/ $f′_{2}$ (1525) decaying to $\eta\eta$ in 2008 data with incoming negative pion beam at 190 GeV/c poses the question whether it is produced centrally or formed by the decay of a heavier diffractively produced $\pi_{1}$(1800)$/\pi_{2}$(1880). To decide, a dedicated amplitude analysis which includes different production mechanisms is formulated and compared with one which was used to fit centrally produced resonances including $f_{0}$(1500) by the WA102 experiment. Unbinned mass-dependent log-likelihood fitting methods may serve to solve the ambiguities which are present in binned, mass-independent partial wave analyses.oai:cds.cern.ch:14956882010
spellingShingle Particle Physics - Experiment
Schlüter, T
Uman, I
Study of $\pi^{-}p\rightarrow\pi^{-}\eta(\eta) p$ at 190 GeV with COMPASS
title Study of $\pi^{-}p\rightarrow\pi^{-}\eta(\eta) p$ at 190 GeV with COMPASS
title_full Study of $\pi^{-}p\rightarrow\pi^{-}\eta(\eta) p$ at 190 GeV with COMPASS
title_fullStr Study of $\pi^{-}p\rightarrow\pi^{-}\eta(\eta) p$ at 190 GeV with COMPASS
title_full_unstemmed Study of $\pi^{-}p\rightarrow\pi^{-}\eta(\eta) p$ at 190 GeV with COMPASS
title_short Study of $\pi^{-}p\rightarrow\pi^{-}\eta(\eta) p$ at 190 GeV with COMPASS
title_sort study of $\pi^{-}p\rightarrow\pi^{-}\eta(\eta) p$ at 190 gev with compass
topic Particle Physics - Experiment
url https://dx.doi.org/10.1063/1.3483381
http://cds.cern.ch/record/1495688
work_keys_str_mv AT schlutert studyofpiprightarrowpietaetapat190gevwithcompass
AT umani studyofpiprightarrowpietaetapat190gevwithcompass

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