Search for structure in the mass region 2220 to 2240 $MeV/c^{2}$ in a $\overline{p} p \to \pi^{0} \pi^{0}$, $\eta \pi^{0}$, $\eta \eta$ formation experiment

Results of a search for narrow resonances in a pp formation experiment with the Crystal Barrel Detector at LEAR are presented. The cross sections for pp to pi /sup 0/ pi /sup 0/, eta pi /sup 0/ and eta eta are determined for annihilation at 9 momenta in the region square root (s)=2222-2240 MeV/c/sup...

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Autor principal: Röthel, W
Lenguaje:eng
Publicado: 1999
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/S0375-9474(99)00192-X
http://cds.cern.ch/record/410802
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author Röthel, W
author_facet Röthel, W
author_sort Röthel, W
collection CERN
description Results of a search for narrow resonances in a pp formation experiment with the Crystal Barrel Detector at LEAR are presented. The cross sections for pp to pi /sup 0/ pi /sup 0/, eta pi /sup 0/ and eta eta are determined for annihilation at 9 momenta in the region square root (s)=2222-2240 MeV/c/sup 2/. No indication for the formation of a xi (2230) is found. Breit-Wigner fits, assuming a resonance width of 5-20 MeV/c/sup 2/, yield the upper limits B(pp to xi )B( xi to pi /sup 0/ pi /sup 0/)<(7.5-5).10/sup -5/ and B(pp to xi )B( xi to eta eta )<(3.0-2.2).10/sup -5/ at 95L. (8 refs).
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publishDate 1999
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spelling cern-4108022019-09-30T06:29:59Zdoi:10.1016/S0375-9474(99)00192-Xhttp://cds.cern.ch/record/410802engRöthel, WSearch for structure in the mass region 2220 to 2240 $MeV/c^{2}$ in a $\overline{p} p \to \pi^{0} \pi^{0}$, $\eta \pi^{0}$, $\eta \eta$ formation experimentParticle Physics - ExperimentResults of a search for narrow resonances in a pp formation experiment with the Crystal Barrel Detector at LEAR are presented. The cross sections for pp to pi /sup 0/ pi /sup 0/, eta pi /sup 0/ and eta eta are determined for annihilation at 9 momenta in the region square root (s)=2222-2240 MeV/c/sup 2/. No indication for the formation of a xi (2230) is found. Breit-Wigner fits, assuming a resonance width of 5-20 MeV/c/sup 2/, yield the upper limits B(pp to xi )B( xi to pi /sup 0/ pi /sup 0/)<(7.5-5).10/sup -5/ and B(pp to xi )B( xi to eta eta )<(3.0-2.2).10/sup -5/ at 95L. (8 refs).oai:cds.cern.ch:4108021999
spellingShingle Particle Physics - Experiment
Röthel, W
Search for structure in the mass region 2220 to 2240 $MeV/c^{2}$ in a $\overline{p} p \to \pi^{0} \pi^{0}$, $\eta \pi^{0}$, $\eta \eta$ formation experiment
title Search for structure in the mass region 2220 to 2240 $MeV/c^{2}$ in a $\overline{p} p \to \pi^{0} \pi^{0}$, $\eta \pi^{0}$, $\eta \eta$ formation experiment
title_full Search for structure in the mass region 2220 to 2240 $MeV/c^{2}$ in a $\overline{p} p \to \pi^{0} \pi^{0}$, $\eta \pi^{0}$, $\eta \eta$ formation experiment
title_fullStr Search for structure in the mass region 2220 to 2240 $MeV/c^{2}$ in a $\overline{p} p \to \pi^{0} \pi^{0}$, $\eta \pi^{0}$, $\eta \eta$ formation experiment
title_full_unstemmed Search for structure in the mass region 2220 to 2240 $MeV/c^{2}$ in a $\overline{p} p \to \pi^{0} \pi^{0}$, $\eta \pi^{0}$, $\eta \eta$ formation experiment
title_short Search for structure in the mass region 2220 to 2240 $MeV/c^{2}$ in a $\overline{p} p \to \pi^{0} \pi^{0}$, $\eta \pi^{0}$, $\eta \eta$ formation experiment
title_sort search for structure in the mass region 2220 to 2240 $mev/c^{2}$ in a $\overline{p} p \to \pi^{0} \pi^{0}$, $\eta \pi^{0}$, $\eta \eta$ formation experiment
topic Particle Physics - Experiment
url https://dx.doi.org/10.1016/S0375-9474(99)00192-X
http://cds.cern.ch/record/410802
work_keys_str_mv AT rothelw searchforstructureinthemassregion2220to2240mevc2inaoverlinepptopi0pi0etapi0etaetaformationexperiment

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