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Exotic baryon resonances in p + p interactions with the NA49 detector

A search for baryon resonance states with exotic quantum numbers was performed in p+p interactions at 158 GeV beam energy with the large acceptance NA49 detector at the Cern SPS. A narrow $\Xi^-\pi^-$ baryon resonance with mass of 1.862 ± 0.002 GeV/c2 and width below the detector resolution of ≈0.01...

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Autor principal: Kadija, K
Lenguaje:eng
Publicado: 2004
Materias:
Acceso en línea:https://dx.doi.org/10.1088/0954-3899/30/8/127
http://cds.cern.ch/record/1015487
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author Kadija, K
author_facet Kadija, K
author_sort Kadija, K
collection CERN
description A search for baryon resonance states with exotic quantum numbers was performed in p+p interactions at 158 GeV beam energy with the large acceptance NA49 detector at the Cern SPS. A narrow $\Xi^-\pi^-$ baryon resonance with mass of 1.862 ± 0.002 GeV/c2 and width below the detector resolution of ≈0.018 GeV/c2 is observed. This state is identified as a candidate for the hypothesized exotic $\Xi^-$$^-$$_5$ baryon with $S = -2, I = \frac{3}{2}$ and a quark content of $(ds\, ds\, \bar{u})$ . In the $\Xi^-\pi^+$ invariant mass spectrum at the same mass, an indication is observed of a candidate of the $\Xi^0$$_5$ member of this isospin quartet with a quark content of $(ds\, us\, \bar{d})$ . The corresponding antibaryon spectra show indications of enhancements at the same location.
id cern-1015487
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2004
record_format invenio
spelling cern-10154872019-09-30T06:29:59Zdoi:10.1088/0954-3899/30/8/127http://cds.cern.ch/record/1015487engKadija, KExotic baryon resonances in p + p interactions with the NA49 detectorParticle Physics - PhenomenologyA search for baryon resonance states with exotic quantum numbers was performed in p+p interactions at 158 GeV beam energy with the large acceptance NA49 detector at the Cern SPS. A narrow $\Xi^-\pi^-$ baryon resonance with mass of 1.862 ± 0.002 GeV/c2 and width below the detector resolution of ≈0.018 GeV/c2 is observed. This state is identified as a candidate for the hypothesized exotic $\Xi^-$$^-$$_5$ baryon with $S = -2, I = \frac{3}{2}$ and a quark content of $(ds\, ds\, \bar{u})$ . In the $\Xi^-\pi^+$ invariant mass spectrum at the same mass, an indication is observed of a candidate of the $\Xi^0$$_5$ member of this isospin quartet with a quark content of $(ds\, us\, \bar{d})$ . The corresponding antibaryon spectra show indications of enhancements at the same location.oai:cds.cern.ch:10154872004
spellingShingle Particle Physics - Phenomenology
Kadija, K
Exotic baryon resonances in p + p interactions with the NA49 detector
title Exotic baryon resonances in p + p interactions with the NA49 detector
title_full Exotic baryon resonances in p + p interactions with the NA49 detector
title_fullStr Exotic baryon resonances in p + p interactions with the NA49 detector
title_full_unstemmed Exotic baryon resonances in p + p interactions with the NA49 detector
title_short Exotic baryon resonances in p + p interactions with the NA49 detector
title_sort exotic baryon resonances in p + p interactions with the na49 detector
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/0954-3899/30/8/127
http://cds.cern.ch/record/1015487
work_keys_str_mv AT kadijak exoticbaryonresonancesinppinteractionswiththena49detector