Observation of an Exotic $S = + 1$ Baryon in Exclusive Photoproduction from the Deuteron

Top Cited Papers

Publisher Website

19 December 2003

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 91 (25) , 252001
https://doi.org/10.1103/physrevlett.91.252001

Abstract

In an exclusive measurement of the reaction

γ d \to K^{+} K^{-} p n

, a narrow peak that can be attributed to an exotic baryon with strangeness

S = + 1

is seen in the

K^{+} n

invariant mass spectrum. The peak is at

1.542 \pm 0.005 G e V / c^{2}

with a measured width of

0.021 G e V / c^{2}

FWHM, which is largely determined by experimental mass resolution. The statistical significance of the peak is

(5.2 \pm 0.6) σ

. The mass and width of the observed peak are consistent with recent reports of a narrow

S = + 1

baryon by other experimental groups.

Keywords

All Related Versions

This publication has 14 references indexed in Scilit:

Observation of a baryon resonance with positive strangeness in K + collisions with Xe nuclei
Physics of Atomic Nuclei, 2003
Evidence for a Narrow $S = + 1$ Baryon Resonance in Photoproduction from the Neutron
Physical Review Letters, 2003
The CEBAF large acceptance spectrometer (CLAS)
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2003
$Q^{2}$ Dependence of Quadrupole Strength in the $γ^{*} p \to Δ^{+} (1232) \to p π^{0}$ Transition
Physical Review Letters, 2002
The bremsstrahlung tagged photon beam in Hall B at JLab
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000
Pentaquark update after ten years
Nuclear Physics A, 1997
Exotic anti-decuplet of baryons: prediction from chiral solitons
The European Physical Journal A, 1997
Partial-wave analysis of $K^{+}$ -nucleon scattering
Physical Review D, 1992
Multiquark baryons and the MIT bag model
Physical Review D, 1979
Neutrinos and nucleon structure
Contemporary Physics, 1975