Comprehensive evidence about a narrow $p \overline{p}$ state of mass 2.02 $GeV/c^2$

We report evidence for the existence of a narrow $p\overline{p}$ state with a mass of 2.02 GeV/c$^2$ and a width below 10 MeV/c$^2$ produced in $\pi^+p(\pi^-p)$ interactions at 20(12) GeV/c in six final states, proceeding via baryon exchange mechanism, that could be interpreted as a $baryonium$ cand...

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Detalles Bibliográficos
Autores principales: Ferrer, A, Grigorian, A A, Perepelitsa, V F, Sonderegger, P
Lenguaje:eng
Publicado: 1999
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1007/s100520050586
http://cds.cern.ch/record/355154
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author Ferrer, A
Grigorian, A A
Perepelitsa, V F
Sonderegger, P
author_facet Ferrer, A
Grigorian, A A
Perepelitsa, V F
Sonderegger, P
author_sort Ferrer, A
collection CERN
description We report evidence for the existence of a narrow $p\overline{p}$ state with a mass of 2.02 GeV/c$^2$ and a width below 10 MeV/c$^2$ produced in $\pi^+p(\pi^-p)$ interactions at 20(12) GeV/c in six final states, proceeding via baryon exchange mechanism, that could be interpreted as a $baryonium$ candidate. The data come from a new analysis of WA56 experiment made with the CERN $\Omega$ spec trometer. Our results are based on the study of an unexplored kinematic region of baryon exchange processes, the central production of mesons. An agreement is found between our results and an ear lier observation of this state, and an explanation is given why it was not seen in several other experiments.
id cern-355154
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
record_format invenio
spelling cern-3551542019-09-30T06:29:59Zdoi:10.1007/s100520050586http://cds.cern.ch/record/355154engFerrer, AGrigorian, A APerepelitsa, V FSonderegger, PComprehensive evidence about a narrow $p \overline{p}$ state of mass 2.02 $GeV/c^2$Particle Physics - ExperimentWe report evidence for the existence of a narrow $p\overline{p}$ state with a mass of 2.02 GeV/c$^2$ and a width below 10 MeV/c$^2$ produced in $\pi^+p(\pi^-p)$ interactions at 20(12) GeV/c in six final states, proceeding via baryon exchange mechanism, that could be interpreted as a $baryonium$ candidate. The data come from a new analysis of WA56 experiment made with the CERN $\Omega$ spec trometer. Our results are based on the study of an unexplored kinematic region of baryon exchange processes, the central production of mesons. An agreement is found between our results and an ear lier observation of this state, and an explanation is given why it was not seen in several other experiments.CERN-EP-98-066oai:cds.cern.ch:3551541999
spellingShingle Particle Physics - Experiment
Ferrer, A
Grigorian, A A
Perepelitsa, V F
Sonderegger, P
Comprehensive evidence about a narrow $p \overline{p}$ state of mass 2.02 $GeV/c^2$
title Comprehensive evidence about a narrow $p \overline{p}$ state of mass 2.02 $GeV/c^2$
title_full Comprehensive evidence about a narrow $p \overline{p}$ state of mass 2.02 $GeV/c^2$
title_fullStr Comprehensive evidence about a narrow $p \overline{p}$ state of mass 2.02 $GeV/c^2$
title_full_unstemmed Comprehensive evidence about a narrow $p \overline{p}$ state of mass 2.02 $GeV/c^2$
title_short Comprehensive evidence about a narrow $p \overline{p}$ state of mass 2.02 $GeV/c^2$
title_sort comprehensive evidence about a narrow $p \overline{p}$ state of mass 2.02 $gev/c^2$
topic Particle Physics - Experiment
url https://dx.doi.org/10.1007/s100520050586
http://cds.cern.ch/record/355154
work_keys_str_mv AT ferrera comprehensiveevidenceaboutanarrowpoverlinepstateofmass202gevc2
AT grigorianaa comprehensiveevidenceaboutanarrowpoverlinepstateofmass202gevc2
AT perepelitsavf comprehensiveevidenceaboutanarrowpoverlinepstateofmass202gevc2
AT sondereggerp comprehensiveevidenceaboutanarrowpoverlinepstateofmass202gevc2

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