The reactions K/sup -/p to pi /sup -or+/ Sigma /sup +or-/(1385) at 42 GeV/c

The total and differential cross sections are presented. Amplitude analyses are performed and the complete sigma /sup +or-/(1385) helicity spin density matrices are extracted. The results are compared with the predictions of the additive quark model and exchange degeneracy. A substantial cross secti...

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Detalles Bibliográficos
Autores principales: Holmgren, S O, Aguilar-Benítez, M, Barreiro, F, Hemingway, R J, Kittel, E W, Kluyver, J C, Losty, Michael J, Massaro, G G G, Van de Walle, R T, Worden, R P, Zatz, J
Lenguaje:eng
Publicado: 1977
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0550-3213(77)90064-5
http://cds.cern.ch/record/877638
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author Holmgren, S O
Aguilar-Benítez, M
Barreiro, F
Hemingway, R J
Kittel, E W
Kluyver, J C
Losty, Michael J
Massaro, G G G
Van de Walle, R T
Worden, R P
Zatz, J
author_facet Holmgren, S O
Aguilar-Benítez, M
Barreiro, F
Hemingway, R J
Kittel, E W
Kluyver, J C
Losty, Michael J
Massaro, G G G
Van de Walle, R T
Worden, R P
Zatz, J
author_sort Holmgren, S O
collection CERN
description The total and differential cross sections are presented. Amplitude analyses are performed and the complete sigma /sup +or-/(1385) helicity spin density matrices are extracted. The results are compared with the predictions of the additive quark model and exchange degeneracy. A substantial cross section is observed for the reaction K /sup -/p to pi /sup +/ Sigma /sup -/(1385) in the forward direction, which implies exotic meson quantum numbers in the t-channel. One possible interpretation of this process provides an explanation for the small but significant violations of the additive quark model predictions observed in the reaction K/sup -/p to pi /sup -/ Sigma /sup +/(1385) at low four-momentum transfer. In the backward direction unnatural parity exchange is shown to give a larger contribution to K /sup -/p to Sigma /sup -/(1385) pi /sup +/ than natural parity exchange. (25 refs).
id cern-877638
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1977
record_format invenio
spelling cern-8776382019-09-30T06:29:59Zdoi:10.1016/0550-3213(77)90064-5http://cds.cern.ch/record/877638engHolmgren, S OAguilar-Benítez, MBarreiro, FHemingway, R JKittel, E WKluyver, J CLosty, Michael JMassaro, G G GVan de Walle, R TWorden, R PZatz, JThe reactions K/sup -/p to pi /sup -or+/ Sigma /sup +or-/(1385) at 42 GeV/cParticle Physics - PhenomenologyThe total and differential cross sections are presented. Amplitude analyses are performed and the complete sigma /sup +or-/(1385) helicity spin density matrices are extracted. The results are compared with the predictions of the additive quark model and exchange degeneracy. A substantial cross section is observed for the reaction K /sup -/p to pi /sup +/ Sigma /sup -/(1385) in the forward direction, which implies exotic meson quantum numbers in the t-channel. One possible interpretation of this process provides an explanation for the small but significant violations of the additive quark model predictions observed in the reaction K/sup -/p to pi /sup -/ Sigma /sup +/(1385) at low four-momentum transfer. In the backward direction unnatural parity exchange is shown to give a larger contribution to K /sup -/p to Sigma /sup -/(1385) pi /sup +/ than natural parity exchange. (25 refs).oai:cds.cern.ch:8776381977
spellingShingle Particle Physics - Phenomenology
Holmgren, S O
Aguilar-Benítez, M
Barreiro, F
Hemingway, R J
Kittel, E W
Kluyver, J C
Losty, Michael J
Massaro, G G G
Van de Walle, R T
Worden, R P
Zatz, J
The reactions K/sup -/p to pi /sup -or+/ Sigma /sup +or-/(1385) at 42 GeV/c
title The reactions K/sup -/p to pi /sup -or+/ Sigma /sup +or-/(1385) at 42 GeV/c
title_full The reactions K/sup -/p to pi /sup -or+/ Sigma /sup +or-/(1385) at 42 GeV/c
title_fullStr The reactions K/sup -/p to pi /sup -or+/ Sigma /sup +or-/(1385) at 42 GeV/c
title_full_unstemmed The reactions K/sup -/p to pi /sup -or+/ Sigma /sup +or-/(1385) at 42 GeV/c
title_short The reactions K/sup -/p to pi /sup -or+/ Sigma /sup +or-/(1385) at 42 GeV/c
title_sort reactions k/sup -/p to pi /sup -or+/ sigma /sup +or-/(1385) at 42 gev/c
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/0550-3213(77)90064-5
http://cds.cern.ch/record/877638
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