Published July 2005 | Version v1
Journal article Metadata-only

The kappa in J/Ψ→K+π-K-π+

Creators

  • 1. University of London, Queen Mary, London (United Kingdom)

Description

BES II data for J/Ψ→K*(890)Kπ reveal a strong κ peak in the Kπ S-wave near threshold. Both magnitude and phase are determined in slices of Kπ mass by interferences with strong K0(1430), K1(1270) and K1(1400) signals. The phase variation with mass agrees within errors with LASS data for Kπ elastic scattering. A combined fit is presented to both BES and LASS data. The fit uses a Breit-Wigner amplitude with an s-dependent width containing an Adler zero. The κ pole is at (760±20(stat)±40(syst))-i(420±45(stat)±60(syst)) MeV. The S-wave I=0 scattering length a0=0.23±0.04 mπ-1 is close to the prediction 0.19±0.02 mπ-1 of Chiral Perturbation Theory at O(p4). (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epja/i2005-10033-3

Additional details

Identifiers

DOI
10.1140/epja/i2005-10033-3;

Publishing Information

Journal Title
European Physical Journal. A
Journal Volume
25
Journal Issue
1
Journal Page Range
p. 107-114
ISSN
1434-6001

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
36087968
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
EFFECTIVE MASS; EXPERIMENTAL DATA; FINAL-STATE INTERACTIONS; HADRONIC PARTICLE DECAY; J PSI-3097 MESONS; MASS SPECTRA; PARTICLE WIDTHS; PION-KAON INTERACTIONS; REST MASS; S WAVES; SCATTERING LENGTHS; STRANGE MESONS
Descriptors DEC
BOSONS; CHARMONIUM; DATA; DECAY; DIMENSIONS; ELEMENTARY PARTICLES; HADRON-HADRON INTERACTIONS; HADRONS; INFORMATION; INTERACTIONS; LENGTH; MASS; MESON-MESON INTERACTIONS; MESONS; NUMERICAL DATA; PARTIAL WAVES; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; QUARKONIUM; SPECTRA; STRANGE PARTICLES; VECTOR MESONS