Direct measurement of the Chudakov effect

Experimental results for the restricted energy loss of pairs created from 1–178 GeV photons in a thin Au target and subsequently passing a CCD detector are presented. It is shown that pairs—when detected close to the creation vertex—suffer a reduced energy loss due to the internal screening of the c...

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Detalles Bibliográficos
Autores principales: Virkus, T, Thomsen, H D, Uggerhøj, E, Uggerhøj1, U I, Ballestrero, S, Sona, P, Mangiarotti, A, Ketel, T J, Dizdar, A, Kartal, S, Pagliarone, C
Lenguaje:eng
Publicado: 2008
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.100.164802
http://cds.cern.ch/record/1495357
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author Virkus, T
Thomsen, H D
Uggerhøj, E
Uggerhøj1, U I
Ballestrero, S
Sona, P
Mangiarotti, A
Ketel, T J
Dizdar, A
Kartal, S
Pagliarone, C
author_facet Virkus, T
Thomsen, H D
Uggerhøj, E
Uggerhøj1, U I
Ballestrero, S
Sona, P
Mangiarotti, A
Ketel, T J
Dizdar, A
Kartal, S
Pagliarone, C
author_sort Virkus, T
collection CERN
description Experimental results for the restricted energy loss of pairs created from 1–178 GeV photons in a thin Au target and subsequently passing a CCD detector are presented. It is shown that pairs—when detected close to the creation vertex—suffer a reduced energy loss due to the internal screening of the charges constituting the pair. Furthermore, the ability to measure directly the energy of the pair by calorimetry enables a comparison with theory as a function of energy. The observed phenomenon is in good qualitative agreement with general expectations from the Chudakov effect but indicates a quantitative disagreement with either of two mutually disagreeing theories.
id cern-1495357
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2008
record_format invenio
spelling cern-14953572019-09-30T06:29:59Zdoi:10.1103/PhysRevLett.100.164802http://cds.cern.ch/record/1495357engVirkus, TThomsen, H DUggerhøj, EUggerhøj1, U IBallestrero, SSona, PMangiarotti, AKetel, T JDizdar, AKartal, SPagliarone, CDirect measurement of the Chudakov effectParticle Physics - ExperimentExperimental results for the restricted energy loss of pairs created from 1–178 GeV photons in a thin Au target and subsequently passing a CCD detector are presented. It is shown that pairs—when detected close to the creation vertex—suffer a reduced energy loss due to the internal screening of the charges constituting the pair. Furthermore, the ability to measure directly the energy of the pair by calorimetry enables a comparison with theory as a function of energy. The observed phenomenon is in good qualitative agreement with general expectations from the Chudakov effect but indicates a quantitative disagreement with either of two mutually disagreeing theories.oai:cds.cern.ch:14953572008
spellingShingle Particle Physics - Experiment
Virkus, T
Thomsen, H D
Uggerhøj, E
Uggerhøj1, U I
Ballestrero, S
Sona, P
Mangiarotti, A
Ketel, T J
Dizdar, A
Kartal, S
Pagliarone, C
Direct measurement of the Chudakov effect
title Direct measurement of the Chudakov effect
title_full Direct measurement of the Chudakov effect
title_fullStr Direct measurement of the Chudakov effect
title_full_unstemmed Direct measurement of the Chudakov effect
title_short Direct measurement of the Chudakov effect
title_sort direct measurement of the chudakov effect
topic Particle Physics - Experiment
url https://dx.doi.org/10.1103/PhysRevLett.100.164802
http://cds.cern.ch/record/1495357
work_keys_str_mv AT virkust directmeasurementofthechudakoveffect
AT thomsenhd directmeasurementofthechudakoveffect
AT uggerhøje directmeasurementofthechudakoveffect
AT uggerhøj1ui directmeasurementofthechudakoveffect
AT ballestreros directmeasurementofthechudakoveffect
AT sonap directmeasurementofthechudakoveffect
AT mangiarottia directmeasurementofthechudakoveffect
AT keteltj directmeasurementofthechudakoveffect
AT dizdara directmeasurementofthechudakoveffect
AT kartals directmeasurementofthechudakoveffect
AT pagliaronec directmeasurementofthechudakoveffect

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