Published September 25, 2009 | Version v1
Journal article Metadata-only

Deep Subthreshold Ξ- Production in Ar+KCl Reactions at 1.76A GeV

Creators

  • 1. II.Physikalisches Institut, Justus Liebig Universitaet Giessen, 35392 Giessen (Germany)
  • 2. Smoluchowski Institute of Physics, Jagiellonian University of Cracow, 30-059 Krakow (Poland)

Description

We report first results on a deep subthreshold production of the doubly strange hyperon Ξ- in a heavy-ion reaction. At a beam energy of 1.76A GeV the reaction Ar+KCl was studied with the High Acceptance Di-Electron Spectrometer at SIS18/GSI. A high-statistics and high-purity Λ sample was collected, allowing for the investigation of the decay channel Ξ-→Λπ-. The deduced Ξ-/(Λ+Σ0) production ratio of (5.6±1.2-1.7+1.8)x10-3 is significantly larger than available model predictions.

Additional details

Identifiers

DOI
10.1103/PhysRevLett.103.132301;
arXiv
arXiv:0907.3582v1;

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
103
Journal Issue
13
Journal Page Range
p. 132301-132301.5
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41101145
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
ELECTRON SPECTROMETERS; GEV RANGE 01-10; HEAVY ION REACTIONS; PARTICLE DECAY; PARTICLE PRODUCTION; POTASSIUM CHLORIDES; SIGMA NEUTRAL PARTICLES; XI MINUS PARTICLES
Descriptors DEC
ALKALI METAL COMPOUNDS; BARYONS; CHLORIDES; CHLORINE COMPOUNDS; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; HALIDES; HALOGEN COMPOUNDS; HYPERONS; MEASURING INSTRUMENTS; NUCLEAR REACTIONS; POTASSIUM COMPOUNDS; SIGMA BARYONS; SIGMA PARTICLES; SPECTROMETERS; STRANGE PARTICLES; XI BARYONS; XI PARTICLES

Optional Information

Notes
(c) 2009 The American Physical Society
Collaborations
HADES Collaboration