Narrow states in $\overline{p}$p: duality expects them, experiment produces them, but are they the same?

The existence of four-quark states coupling strongly to BB channels has been expected from duality for a long time. Recently, narrow states have been produced in an Omega experiment on backward pi /sup - /p scattering, which are seen in their decay to pp. The author discusses whether these narrow st...

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Detalles Bibliográficos
Autor principal: Pennington, Michael R
Lenguaje:eng
Publicado: 1978
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0550-3213(78)90052-4
http://cds.cern.ch/record/132807
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author Pennington, Michael R
author_facet Pennington, Michael R
author_sort Pennington, Michael R
collection CERN
description The existence of four-quark states coupling strongly to BB channels has been expected from duality for a long time. Recently, narrow states have been produced in an Omega experiment on backward pi /sup - /p scattering, which are seen in their decay to pp. The author discusses whether these narrow states are those expected by duality. If they are, duality makes a definite statement about the cross section for their production. This is shown to be 30 times larger than observed. If these narrow resonances are qqqq mesons that generate qq exchange, then these can only be one of two types of such states. The author concludes that the observed narrow states are not yet proven to be qqqq mesons rather than, for example, BB bound states. (58 refs).
id cern-132807
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1978
record_format invenio
spelling cern-1328072019-09-30T06:29:59Zdoi:10.1016/0550-3213(78)90052-4http://cds.cern.ch/record/132807engPennington, Michael RNarrow states in $\overline{p}$p: duality expects them, experiment produces them, but are they the same?Particle Physics - PhenomenologyThe existence of four-quark states coupling strongly to BB channels has been expected from duality for a long time. Recently, narrow states have been produced in an Omega experiment on backward pi /sup - /p scattering, which are seen in their decay to pp. The author discusses whether these narrow states are those expected by duality. If they are, duality makes a definite statement about the cross section for their production. This is shown to be 30 times larger than observed. If these narrow resonances are qqqq mesons that generate qq exchange, then these can only be one of two types of such states. The author concludes that the observed narrow states are not yet proven to be qqqq mesons rather than, for example, BB bound states. (58 refs).CERN-TH-2457oai:cds.cern.ch:1328071978-02-08
spellingShingle Particle Physics - Phenomenology
Pennington, Michael R
Narrow states in $\overline{p}$p: duality expects them, experiment produces them, but are they the same?
title Narrow states in $\overline{p}$p: duality expects them, experiment produces them, but are they the same?
title_full Narrow states in $\overline{p}$p: duality expects them, experiment produces them, but are they the same?
title_fullStr Narrow states in $\overline{p}$p: duality expects them, experiment produces them, but are they the same?
title_full_unstemmed Narrow states in $\overline{p}$p: duality expects them, experiment produces them, but are they the same?
title_short Narrow states in $\overline{p}$p: duality expects them, experiment produces them, but are they the same?
title_sort narrow states in $\overline{p}$p: duality expects them, experiment produces them, but are they the same?
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/0550-3213(78)90052-4
http://cds.cern.ch/record/132807
work_keys_str_mv AT penningtonmichaelr narrowstatesinoverlineppdualityexpectsthemexperimentproducesthembutaretheythesame

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