Measurements of chi(3510), chi(3555), and neutral strange particles in interactions of 200 and 250 GeV/c protons and 190 GeV/c negative pions with a beryllium target

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5041703

Simmons, J K

Production of the charmonium states {chi}(3510) and {chi}(3555) ({chi}1 and {chi}2) was observed in interactions of a beryllium target with 200 GeV/c and 250 GeV/c proton beams and a 190 GeV/c negative pion beam. The {chi}s were seen through their decay into J/{Psi} + {gamma}, and the J/{Psi}s through their decay into muons, which were detected in a magnetic spectrometer. In {pi}{sup {minus}} interactions, we found that {sigma}({chi}1)/{sigma}({chi}2) was 1.28 {plus minus} 0.61, and in proton interactions was 0.19 {plus minus} 0.26. Because no clear {chi}1 signal was seen in proton interactions, we also calculated a 90% confidence level upper limit of 0.50 on this ratio. K{sub s}{sup 0}s, {Lambda}s, and {Lambda}s were detected in {pi}{sup {minus}} data through their decays into {pi}{sup +} + {pi}{sup {minus}}, p + {pi}{sup {minus}}, and p + {pi}{sup +}, respectively. The small size of the area in which we were able to search for these decays limited our ability to detect neutral strange particles beyond the central region.

• Research Organization: Purdue Univ., Lafayette, IN (USA)
• OSTI ID: 5041703
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101* -- Activation
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Radiometric & Radiochemical Procedures
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651100 -- Nuclear Physics-- Experimental Techniques-- (1980-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH METALS
BERYLLIUM
CALCULATION METHODS
DATA
DATA ANALYSIS
ELEMENTS
EXPERIMENTAL DATA
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
MEASURING INSTRUMENTS
MEASURING METHODS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
METALS
NUMERICAL DATA
PARTICLE INTERACTIONS
PION MINUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS