Strange meson spectroscopy in K[omega] and K[phi] at 11 GeV/c and Cherenkov ring imaging at SLD
This thesis consists of two independent parts; development of Cherenkov Ring Imaging Detector (CRID) system and analysis of high-statistics data of strange meson reactions from the LASS spectrometer. Part 1: The CRID system is devoted to charged particle identification in the SLAC Large Detector (SLD) to study e[sup +]e[sup [minus]] collisions at [radical]s = m[sub Z[sup 0]]. By measuring the angles of emission of the Cherenkov photons inside liquid and gaseous radiators, [pi]/K/p separation will be achieved up to [approximately]30 GeV/c. The signals from CRID are read in three coordinates, one of which is measured by charge-division technique. To obtain a [approximately]1% spatial resolution in the charge-division, low-noise CRID preamplifier prototypes were developed and tested resulting in <1000 electrons noise for an average photoelectron signal with 2 [times] 10[sup 5] gain. To help ensure the long-term stability of CRID operation at high efficiency, a comprehensive monitoring and control system was developed. Part 2: Results from the partial wave analysis of strange meson final states in the reactions K[sup [minus]]p [yields] K[sup [minus]][omega]p and K[sup [minus]]p [yields] [bar K][sup 0][phi]n are presented. The analyses are based on data from a 4.1 event/nb exposure of the LASS spectrometer in K[sup [minus]]p interactions at 11 GeV/c. The data sample of K[sup [minus]][omega]p final state contains [approximately]10[sup 5] events. From the partial wave analysis, resonance structures of J[sup P] = 2[sup [minus]], 3[sup [minus]] and 2[sup +] amplitudes are observed in the K[omega] system. The analysis of 2[sup [minus]] amplitudes provides an evidence for two strange meson states in the mass region around 1.75 GeV/c[sup 2]. The appropriate branching fractions are calculated and compared with the SU(3) predictions. The partial wave analysis of [bar K][sup 0][phi] system favors J[sup P] = 1[sup [minus]] and 2[sup +] states in the 1.9--2.0 GeV/c[sup 2] region.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 6498408
- Report Number(s):
- SLAC-409; ON: DE93013593
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
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Strange meson spectroscopy in Kω and KΦ at 11 GeV/c and Cherenkov ring imaging at SLD
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Related Subjects
43 PARTICLE ACCELERATORS
CHERENKOV COUNTERS
DESIGN
PARTICLE IDENTIFICATION
PERFORMANCE TESTING
KAON MINUS-PROTON INTERACTIONS
MESON SPECTROSCOPY
STANFORD LINEAR COLLIDER DETECTOR
STRANGE MESONS
DATA ANALYSIS
PARTIAL WAVES
ELECTRON-POSITRON INTERACTIONS
K 2-1430 MESONS
K 3-1780 MESONS
KAONS MINUS
KAONS NEUTRAL
MESON REACTIONS
PROTONS
BARYONS
BOSONS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
KAON-NUCLEON INTERACTIONS
KAON-PROTON INTERACTIONS
KAONS
LEPTON-LEPTON INTERACTIONS
MEASURING INSTRUMENTS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SPECTROSCOPY
STRANGE PARTICLES
TENSOR MESONS
TESTING
662340* - Hadron Interactions- (1992-)
430303 - Particle Accelerators- Experimental Facilities & Equipment