J. Vieira

Publications (5)0 Total impact

• Source

  Available from: Igor G. Irastorza

  Article: An improved limit on the axion-photon coupling from the CAST experiment

  Samuel A Andriamonje, S. Aune, D. Autiero, K. Barth, A. Belov, B. Beltran, H. Bräuninger, J. M. Carmona, S. Cebrián, J. I. Collar, [......], J. Ruz, I. Savvidis, Y K Semertzidis, Pasquale Dario Serpico, L. Stewart, J. Vieira, J. Villar, J Vogel, L Walckiers, K. Zioutas
  [show abstract] [hide abstract]
  ABSTRACT: We have searched for solar axions or similar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup with improved conditions in all detectors. From the absence of excess X-rays when the magnet was pointing to the Sun, we set an upper limit on the axion-photon coupling of 8.8 x 10^{-11} GeV^{-1} at 95% CL for m_a <~ 0.02 eV. This result is the best laboratory limit over a broad range of axion masses and for m_a <~ 0.02 eV also supersedes the previous limit derived from energy-loss arguments on globular-cluster stars.
• Article: The CERN Axion Solar Telescope (CAST): an update

  S. Andriamonje, V. Arsov, S. Aune, T. Aune, F. T. Avignone III, K. Barth, A. Belov, B. Beltran, H. Bräuninger, J. Carmona, [......], J. Ruz, M. Sarsa, C Schill, W. Serber, Y. Semertzidis, J. Vieira, J. Villar, B. Vullierme, L Walckiers, K. Zioutas
  Nuclear Physics B - Proceedings Supplements, v.138, 41-44 (2005).
• Article: First results from the CAST experiment

  T. Dafni, S. Andriamonje, V. Arsov, S. Aune, D. Autiero, K. Barth, A. Belov, B. Beltrán, H. Bräuninger, J. Carmona, [......], M. Sarsa, I. Savvidis, Y. Semertzidis, W. Serber, P. Serpico, L. Stewart, J. Vieira, J. Villar, L Walckiers, K. Zioutas
  Journal of Physics: Conference Series, v.39, 117-119 (2006).
• Source

  Available from: Igor G. Irastorza

  Article: An improved limit on the axion–photon coupling from the CAST experiment

  S. Andriamonje, S. Aune, D. Autiero, K. Barth, A. Belov, B. Beltran, H. Bräuninger, J. M. Carmona, S. Cebrian, J. I. Collar, [......], J. Ruz, I. Savvidis, Y. Semertzidis, P. Serpico, L. Stewart, J. Vieira, J. Villar, J Vogel, L Walckiers, K. Zioutas
  Journal of Cosmology and Astroparticle Physics (2007).
• Article: An Improved limit on the axion-photon coupling from the CAST experiment

  S. Andriamonje, S. Aune, D. Autiero, K. Barth, A. Belov, B. Beltran, H. Brauninger, J. M. Carmona, S. Cebrian, J. I. Collar, [......], J. Ruz, I. Savvidis, Y. Semertzidis, P. Serpico, L. Stewart, J. Vieira, J. Villar, J Vogel, L Walckiers, K. Zioutas
  [show abstract] [hide abstract]
  ABSTRACT: We have searched for solar axions or similar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup with improved conditions in all detectors. From the absence of excess X-rays when the magnet was pointing to the Sun, we set an upper limit on the axion-photon coupling of 8.8 x 10^{-11} GeV^{-1} at 95% CL for m_a <~ 0.02 eV. This result is the best experimental limit over a broad range of axion masses and for m_a <~ 0.02 eV also supersedes the previous limit derived from energy-loss arguments on globular-cluster stars.
  Journal of Cosmology and Astroparticle Physics, 010 (2007).