Study of the strange meson spectrum as observed in the reaction K/sup -/p. -->. anti K/sup 0/. pi. /sup +/. pi. /sup -/n at 11 GeV/C

Technical Report · Thu May 01 00:00:00 EDT 1986

OSTI ID:5682237

Sinervo, J P.K.

The results of a high statistics study of the reaction K/sup -/p ..-->.. anti K/sup 0/ ..pi../sup +/..pi../sup -/ are presented. The data derive from a 4 event/nanobarn exposure of the LASS (Large Aperture Superconducting Solenoid) spectrometer to an 11 GeV/c K/sup -/ beam. The anti K/sup 0/ ..pi../sup +/..pi../sup -/n sample consists of 34 000 events with anti K/sup 0/ ..pi../sup +/..pi../sup -/ invariant masses less than 2.4 GeV/c/sup 2/ and absolute value t' less than or equal to 0.3 (GeV/c)/sup 2/. The forward-produced anti K/sup 0/ ..pi../sup +/..pi../sup -/ events arise predominantly through the production and subsequent strong decay of natural spin-parity strange meson states (J/sup P/ = 1/sup -/, 2/sup +/,...). Their production can be understood in the context of an exchange model, while their decay into the anti K/sup 0/ ..pi../sup +/..pi../sup -/ final state proceeds through intermediate two-body states such as K*(892)/sup -/..pi../sup +/, anti K/sup 0/p(770)/sup 0/, K*(1430)/sup -/..pi../sup +/, and anti K/sup 0/ line integral (1270)/sup 0/. A partial wave analysis employing the three-body isobar model successfully describes all of the features of the data. The J/sup P/ = 1/sup +/, 2/sup +/, and 3/sup -/ partial waves show resonant behavior that is attributed to the production and decay of the 1/sup +/ Q(1400), the 2/sup +/ K*(1430), and the 3/sup -/ K*(1780). The structure in the 1/sup -/ amplitudes can be understood as arising from two vector states, one at approx.1.42 GeV/c/sup 2/ coupling only to K*..pi.. and the other at approx.1.73 decaying to both K*..pi.. and Kp. The J/sup P/ = 4/sup +/ waves, requires above a mass of 2.0 GeV/c/sup 2/, show structure that may arise from the production of the 4+ K*(2060). There is a second enhancement in the J/sup P/ = 2/sup +/ waves at approx.2.0 GeV/c/sup 2/ that may be evidence for a new resonant state.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 5682237
• Report Number(s): SLAC-299; ON: DE86012820
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted. Thesis
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
KAON MINUS-PROTON INTERACTIONS
MESON SPECTROSCOPY
STRANGE PARTICLES
ANTIKAONS NEUTRAL
COMPUTERIZED SIMULATION
EXPERIMENTAL DATA
MASS SPECTRA
MONTE CARLO METHOD
NEUTRONS
PARTIAL WAVES
PIONS MINUS
PIONS PLUS
QUARK MODEL
ANTIKAONS
ANTIMATTER
ANTIPARTICLES
BARYONS
BOSONS
COMPOSITE MODELS
DATA
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
KAON-NUCLEON INTERACTIONS
KAON-PROTON INTERACTIONS
KAONS
KAONS NEUTRAL
MATHEMATICAL MODELS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NUCLEONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE MODELS
PIONS
PSEUDOSCALAR MESONS
SIMULATION
SPECTRA
SPECTROSCOPY
STRANGE MESONS
645104* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Meson-Induced Interactions- (-1987)