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Study of the reaction pp. -->. p(n. pi. /sup +/) at the CERN intersecting storage rings

Abstract

New results are presented on the diffraction dissociation of protons into (n..pi../sup +/) systems at the CERN intersecting storage rings. The data were taken at the centre of mass energy ..sqrt..s=45GeV and a very high statistics of events (nearly 75,000) was obtained. The experiment was performed at the Split Field Magnet whose description is made as well as that of the special neutron devices and of the trigger logic. The software chain (pattern recognition, geometrical reconstruction and kinematical fitting) is also described. A particular emphasis is put on the four-dimensional acceptance correction applied to the events. Phenomenological comments are given on two different but complementary approaches: the impact parameter description in the s-channel and the Deck model. The physics results are shown with in particular, detailed studies for the five following variables: the momentum transfer from proton to proton, the (n..pi../sup +/) invariant mass, the Jackson angles of this system and the momentum transfer from proton to neutron. A comparison with the pion-exchange Deck model is performed, showing a qualitative agreement with the data. Several experiments at a lower energy are also compared: on the average, there is little evolution with energy.
Authors:
Broll, C [1] 
  1. Paris-11 Univ., 91 - Orsay (France). Inst. de Physique Nucleaire
Publication Date:
Jul 01, 1976
Product Type:
Journal Article
Reference Number:
AIX-07-277139; EDB-77-027841
Resource Relation:
Journal Name: Ann. Phys. (Paris); (France); Journal Volume: 1:1
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PROTON-PROTON INTERACTIONS; DIFFRACTION; ANGULAR DISTRIBUTION; CENTER-OF-MASS SYSTEM; DATA PROCESSING; DECK EFFECT; DIFFERENTIAL CROSS SECTIONS; ENERGY DEPENDENCE; GEV RANGE 10-100; IMPACT PARAMETER; MASS SPECTRA; MULTIWIRE PROPORTIONAL CHAMBERS; NEUTRON DETECTION; NEUTRONS; PARTICLE PRODUCTION; PARTICLE TRACKS; PIONS PLUS; S CHANNEL; TOTAL CROSS SECTIONS; BARYON-BARYON INTERACTIONS; BARYONS; BOSONS; COHERENT SCATTERING; CROSS SECTIONS; DISTRIBUTION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; MEASURING INSTRUMENTS; MESONS; NUCLEON-NUCLEON INTERACTIONS; NUCLEONS; PARTICLE INTERACTIONS; PIONS; PROCESSING; PROPORTIONAL COUNTERS; PROTON-NUCLEON INTERACTIONS; PSEUDOSCALAR MESONS; RADIATION DETECTION; RADIATION DETECTORS; SCATTERING; SPECTRA; 645104* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Meson-Induced Interactions- (-1987)
OSTI ID:
7134807
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Journal ID: CODEN: ANPHA
Submitting Site:
INIS
Size:
Pages: 5-72
Announcement Date:
Jan 01, 1977

Citation Formats

Broll, C. Study of the reaction pp. -->. p(n. pi. /sup +/) at the CERN intersecting storage rings. France: N. p., 1976. Web.
Broll, C. Study of the reaction pp. -->. p(n. pi. /sup +/) at the CERN intersecting storage rings. France.
Broll, C. 1976. "Study of the reaction pp. -->. p(n. pi. /sup +/) at the CERN intersecting storage rings." France.
@misc{etde_7134807,
title = {Study of the reaction pp. -->. p(n. pi. /sup +/) at the CERN intersecting storage rings}
author = {Broll, C}
abstractNote = {New results are presented on the diffraction dissociation of protons into (n..pi../sup +/) systems at the CERN intersecting storage rings. The data were taken at the centre of mass energy ..sqrt..s=45GeV and a very high statistics of events (nearly 75,000) was obtained. The experiment was performed at the Split Field Magnet whose description is made as well as that of the special neutron devices and of the trigger logic. The software chain (pattern recognition, geometrical reconstruction and kinematical fitting) is also described. A particular emphasis is put on the four-dimensional acceptance correction applied to the events. Phenomenological comments are given on two different but complementary approaches: the impact parameter description in the s-channel and the Deck model. The physics results are shown with in particular, detailed studies for the five following variables: the momentum transfer from proton to proton, the (n..pi../sup +/) invariant mass, the Jackson angles of this system and the momentum transfer from proton to neutron. A comparison with the pion-exchange Deck model is performed, showing a qualitative agreement with the data. Several experiments at a lower energy are also compared: on the average, there is little evolution with energy.}
journal = []
volume = {1:1}
journal type = {AC}
place = {France}
year = {1976}
month = {Jul}
}