Traces of the Θ+ pentaquark in K+-nucleus dynamics

A. Gal*, E. Friedman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Long-standing anomalies in K+-nucleus integral cross sections could be resolved by extending the impulse-approximation tρ optical-potential framework to incorporate K+ absorption on pairs of nucleons. Substantially improved fits to the data at plab ∼ 500-700 MeV/c are obtained. An upper bound on the absorption cross section per nucleon is derived, σabs(K+)/A ∼ 3.5 mb. We conjecture that the underlying microscopic absorption process is K+ nN →+ N, where Θ+ (1540) is the newly discovered exotic Y = 2, 1 = 0, Z = 1 pentaquark baryon, and estimate that σ(K+ d →Θ+ p) is a fraction of millibarn. Comments are made on Θ+ production reactions on nuclei.

Original languageEnglish
Article number072301
JournalPhysical Review Letters
Volume94
Issue number7
DOIs
StatePublished - 25 Feb 2005

Fingerprint

Dive into the research topics of 'Traces of the Θ+ pentaquark in K+-nucleus dynamics'. Together they form a unique fingerprint.

Cite this