A search for 5.5 MeV solar axions produced in the p+d→3He+A (5.5 MeV) reaction was performed using the Borexino detector. The Compton conversion of axions to photons, A+e→e+γ; the axioelectric effect, A+e+Z→e+Z; the decay of axions into two photons, A→2γ; and inverse Primakoff conversion on nuclei, A+Z→γ+Z, are considered. Model-independent limits on axion-electron (gAe), axion-photon (gAγ), and isovector axion-nucleon (g3AN) couplings are obtained: |gAe×g3AN|≤5.5×10-13 and |gAγ×g3AN|≤4.6×10-11 GeV-1 at mA< 1 MeV (90% confidence level). These limits are 2–4 orders of magnitude stronger than those obtained in previous laboratory-based experiments using nuclear reactors and accelerators.
Search for Solar Axions Produced in p(d; 3He)A Reaction with Borexino Detector
ORTICA, Fausto;ROMANI, Aldo;
2012
Abstract
A search for 5.5 MeV solar axions produced in the p+d→3He+A (5.5 MeV) reaction was performed using the Borexino detector. The Compton conversion of axions to photons, A+e→e+γ; the axioelectric effect, A+e+Z→e+Z; the decay of axions into two photons, A→2γ; and inverse Primakoff conversion on nuclei, A+Z→γ+Z, are considered. Model-independent limits on axion-electron (gAe), axion-photon (gAγ), and isovector axion-nucleon (g3AN) couplings are obtained: |gAe×g3AN|≤5.5×10-13 and |gAγ×g3AN|≤4.6×10-11 GeV-1 at mA< 1 MeV (90% confidence level). These limits are 2–4 orders of magnitude stronger than those obtained in previous laboratory-based experiments using nuclear reactors and accelerators.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
