skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Axions 05

Abstract

The Strong CP Problem and its resolution through the existence of an axion are briefly reviewed. The combined constraints from accelerator searches, the evolution of red giants and the duration of the SN 1987a neutrino pulse require the axion mass ma to be less than 3 {center_dot} 10-3 eV. On the other hand, the requirement that the axion does not overclose the universe implies a lower bound on ma of order 10-6 eV. This lower bound can, however, be relaxed in a number of ways. If ma is near the lower bound, axions are an important contribution to the energy density of the universe in the form of (very) cold dark matter. Dark matter axions can be searched for on Earth by stimulating their conversion to microwave photons in an electromagnetic cavity permeated by a magnetic field. Using this technique, limits on the local halo density have been placed by the Axion Dark Matter eXperiment. I'll give a status report on ADMX and its upgrade presently under construction. I'll also report on recent results from solar axion searches and laser experiments.

Authors:
 [1]
  1. Institute for Fundamental Theory, Physics Department, University of Florida, Gainesville, FL 32611-8440 (United States)
Publication Date:
OSTI Identifier:
20729165
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 805; Journal Issue: 1; Conference: PASCOS 2005: 11. international symposium on particles, strings, and cosmology, Gyeongju (Korea, Republic of), 30 May - 4 Jun 2005; Other Information: DOI: 10.1063/1.2149671; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AXIONS; CONVERSION; DENSITY; ENERGY DENSITY; EV RANGE; MAGNETIC FIELDS; MICROWAVE RADIATION; NEUTRINOS; NONLUMINOUS MATTER; PHOTONS; PULSES; RESOLUTION; REST MASS; UNIVERSE

Citation Formats

Sikivie, Pierre. Axions 05. United States: N. p., 2005. Web. doi:10.1063/1.2149671.
Sikivie, Pierre. Axions 05. United States. doi:10.1063/1.2149671.
Sikivie, Pierre. Fri . "Axions 05". United States. doi:10.1063/1.2149671.
@article{osti_20729165,
title = {Axions 05},
author = {Sikivie, Pierre},
abstractNote = {The Strong CP Problem and its resolution through the existence of an axion are briefly reviewed. The combined constraints from accelerator searches, the evolution of red giants and the duration of the SN 1987a neutrino pulse require the axion mass ma to be less than 3 {center_dot} 10-3 eV. On the other hand, the requirement that the axion does not overclose the universe implies a lower bound on ma of order 10-6 eV. This lower bound can, however, be relaxed in a number of ways. If ma is near the lower bound, axions are an important contribution to the energy density of the universe in the form of (very) cold dark matter. Dark matter axions can be searched for on Earth by stimulating their conversion to microwave photons in an electromagnetic cavity permeated by a magnetic field. Using this technique, limits on the local halo density have been placed by the Axion Dark Matter eXperiment. I'll give a status report on ADMX and its upgrade presently under construction. I'll also report on recent results from solar axion searches and laser experiments.},
doi = {10.1063/1.2149671},
journal = {AIP Conference Proceedings},
number = 1,
volume = 805,
place = {United States},
year = {Fri Dec 02 00:00:00 EST 2005},
month = {Fri Dec 02 00:00:00 EST 2005}
}