Experimental medium energy physics: Annual progress report, June 1986-May 1987

Technical Report · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6062307

During the past year the Carnegie Mellon University (CMU) Medium Energy Physics Group activities included five experimental programs, each at different stages of development. The analyses of data from two previous experiments were completed over the last year; a recent doctoral thesis represents a milestone in our study of the weak decays of hypernuclei. Software and hardware support was continued and data analysis initiated for the two experiments which received running time during this period. The status of the H dibaryon search proposals changed from conditional approval to full approval when funds were allocated for the new kaon beam line required for the experiments. The measurements of anti ..lambda lambda.. production at LEAR (PS-185) have been completed. A study of the polarization and angular distributions near threshold have been submitted for publication and an analysis of a CP test of the decay asymmetry parameters is complete. Results of data taken last year are being finalized. The analysis of data on the decay of /sup 5//sub ..lambda../He (AGS E-788) taken at BNL has also been completed in the past year and a publication is in preparation. Last summer the focus of the PS185 collaboration shifted from anti ..lambda lambda.. to a search for evidence of the xi(2230) using the anti pp ..-->.. K/sub s/K/sub s/ channel. Modifications designed to increase the acceptance of the LEAR anti ..lambda lambda.. experimental apparatus for this reaction were completed and a scan of the energy region near 2230 MeV took place in August. The data from this experiment are being analyzed at CMU. The CMU group has had extensive involvement in an experiment to search for strangeness production relativistic heavy ion collisions (CERN NA36). CMU personnel have installed computer hardware and worked on the development of new software designed for the on-line monitoring. The work was completed in time for the first running of the experiment in November of 1986.

• Research Organization: Carnegie-Mellon Univ., Pittsburgh, PA (USA)
• DOE Contract Number: FG02-87ER40315
• OSTI ID: 6062307
• Report Number(s): DOE/ER/40315-142; ON: DE87012752; TRN: 87-031235
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR PHYSICS
RESEARCH PROGRAMS
ANTILAMBDA PARTICLES
DATA ACQUISITION SYSTEMS
HEAVY ION REACTIONS
HYPERNUCLEI
LAMBDA PARTICLES
PROTON-ANTIPROTON INTERACTIONS
RADIATION DETECTORS
RELATIVISTIC RANGE
SIGMA PARTICLES
STRANGENESS
ANTIBARYONS
ANTIHYPERONS
ANTIMATTER
ANTIPARTICLES
BARYON-BARYON INTERACTIONS
BARYONS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INTERACTIONS
LAMBDA BARYONS
MEASURING INSTRUMENTS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEI
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PHYSICS
SIGMA BARYONS
STRANGE PARTICLES
651000* - Nuclear Physics