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Title: Search for Stable Strange Quark Matter in Lunar Soil

We report results from a search for strangelets (small chunks of strange quark matter) in lunar soil using the Yale WNSL accelerator as a mass spectrometer. We have searched over a range in mass from A=42 to A=70 amu for nuclear charges 5, 6, 8, 9, and 11. No strangelets were found in the experiment. For strangelets with nuclear charge 8, a concentration in lunar soil higher than 10{sup -16} is excluded at the 95% confidence level. The implied limit on the strangelet flux in cosmic rays is the most sensitive to date for the covered range and is relevant to both recent theoretical flux predictions and a strangelet candidate event found by the AMS-01 experiment.
Authors:
; ; ; ; ;  [1] ; ;  [2] ;  [3] ;  [4]
  1. Physics Department, Yale University, New Haven, Connecticut 06520 (United States)
  2. A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States)
  3. Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C (Denmark)
  4. Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
21364647
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 103; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevLett.103.092302; (c) 2009 The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ATOMIC NUMBER; COSMIC RADIATION; LUNAR MATERIALS; MASS SPECTROMETERS; MOON; QUARK MATTER; S QUARKS; SOILS ELEMENTARY PARTICLES; FERMIONS; IONIZING RADIATIONS; MATERIALS; MATTER; MEASURING INSTRUMENTS; QUARKS; RADIATIONS; SATELLITES; SPECTROMETERS; STRANGE PARTICLES