Observed differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISR

The direct photon production in pp collisions for c.m. energies 31<or= square root s<or=63 GeV and transverse momenta of up to 9 GeV/c were measured at the ISR using a segmented lead/liquid argon calorimeter. The observed gamma / pi /sup 0/ ratio is found to be significantly larger than zero a...

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Detalles Bibliográficos
Autor principal: Rahm, D C
Lenguaje:eng
Publicado: 1981
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1063/1.32411
http://cds.cern.ch/record/879257
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author Rahm, D C
author_facet Rahm, D C
author_sort Rahm, D C
collection CERN
description The direct photon production in pp collisions for c.m. energies 31<or= square root s<or=63 GeV and transverse momenta of up to 9 GeV/c were measured at the ISR using a segmented lead/liquid argon calorimeter. The observed gamma / pi /sup 0/ ratio is found to be significantly larger than zero at 4 GeV/c in p/sub T/ increasing to 0.4 at 9 GeV/c. The average multiplicity on the trigger side for the single-photon events was found to be significantly lower than for pi /sup 0/ events. The correlations in Delta y and Delta phi between the trigger particle and an additional particle are found to differ mainly at small Delta y and Delta phi . (14 refs).
id cern-879257
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1981
record_format invenio
spelling cern-8792572019-09-30T06:29:59Zdoi:10.1063/1.32411http://cds.cern.ch/record/879257engRahm, D CObserved differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISRParticle Physics - ExperimentThe direct photon production in pp collisions for c.m. energies 31<or= square root s<or=63 GeV and transverse momenta of up to 9 GeV/c were measured at the ISR using a segmented lead/liquid argon calorimeter. The observed gamma / pi /sup 0/ ratio is found to be significantly larger than zero at 4 GeV/c in p/sub T/ increasing to 0.4 at 9 GeV/c. The average multiplicity on the trigger side for the single-photon events was found to be significantly lower than for pi /sup 0/ events. The correlations in Delta y and Delta phi between the trigger particle and an additional particle are found to differ mainly at small Delta y and Delta phi . (14 refs).oai:cds.cern.ch:8792571981
spellingShingle Particle Physics - Experiment
Rahm, D C
Observed differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISR
title Observed differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISR
title_full Observed differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISR
title_fullStr Observed differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISR
title_full_unstemmed Observed differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISR
title_short Observed differences in event structures of high-p/sub T/ pi /sup 0/ and single photon events produced in pp collisions in the CERN ISR
title_sort observed differences in event structures of high-p/sub t/ pi /sup 0/ and single photon events produced in pp collisions in the cern isr
topic Particle Physics - Experiment
url https://dx.doi.org/10.1063/1.32411
http://cds.cern.ch/record/879257
work_keys_str_mv AT rahmdc observeddifferencesineventstructuresofhighpsubtpisup0andsinglephotoneventsproducedinppcollisionsinthecernisr

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