Results of background measurements with a prototype of the Borexino detector were used to search for 478 keV solar axions emitted in the M1-transitions of 7Li*. The Compton conversion of axion to a photon A+e→e+γ, axioelectric effect A+e+Z→e+Z, decay of axion in two photons A→2γ and Primakoff conversion on nuclei A+Z→γ+Z are considered. The upper limit on constants of interaction of axion with electrons, photons and nucleons – gAegAN≤(1.0–2.4)×10-10 at mA≤450 keV and gAγgAN≤5×10-9 GeV-1 at mA≤10 keV are obtained (90%c.l.). For heavy axions with mass at 100<mA<400 keV the limits gAe<(0.7–2.0)×10-8 and gAγ<10-9–10-8 are obtained in assumption that gAN depends on mA as for KSVZ axion model. These limits are stronger than obtained in previous laboratory-based experiments using nuclear reactor and artificial radioactive sources.
Search for solar axions emitted in the M1-transition of 7Li* with Borexino CTF / G. Bellini, J. Benziger, S. Bonetti, B. Caccianiga, F. Calaprice, F. Dalnoki-Veress, D. D’Angelo, H. de Kerret, A. Derbin, A. Etenko, K. Fomenko, D. Franco, C. Galbiati, S. Gazzana, M.G. Giammarchi, M. Goeger-Neff, A. Goretti, C. Grieb, S. Hardy, A. Ianni, A.M. Ianni, M. Joyce, V.V. Kobychev, G. Korga, D. Kryn, M. Laubenstein, M. Leung, E. Litvinovich, P. Lombardi, L. Ludhova, I. Machulin, G. Manuzio, F. Masetti, K. McCarty, E. Meroni, L. Miramonti, M. Misiaszek, D. Montanari, M.E. Monzani, V. Muratova, L. Niedermeier, L. Oberauer, M. Obolensky, F. Ortica, M. Pallavicini, L. Papp, L. Perasso, R.S. Raghavan, G. Ranucci, A. Razeto, A. Sabelnikov, C. Salvo, S. Sch¨onert, H. Simgen, M. Skorokhvatov, O. Smirnov, A. Sotnikov, S. Sukhotin, Y. Suvorov, V. Tarasenkov, R. Tartaglia, G. Testera, D. Vignaud, F. von Feilitzsch, R.B. Vogelaar, M. Wojcik, O. Zaimidoroga, S. Zavatarelli, G. Zuzel. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 54:1(2008), pp. 61-72. [10.1140/epjc/s10052-008-0530-9]
Search for solar axions emitted in the M1-transition of 7Li* with Borexino CTF
G. BelliniPrimo
;S. Bonetti;D. D’Angelo;D. Franco;E. Meroni;L. Miramonti;
2008
Abstract
Results of background measurements with a prototype of the Borexino detector were used to search for 478 keV solar axions emitted in the M1-transitions of 7Li*. The Compton conversion of axion to a photon A+e→e+γ, axioelectric effect A+e+Z→e+Z, decay of axion in two photons A→2γ and Primakoff conversion on nuclei A+Z→γ+Z are considered. The upper limit on constants of interaction of axion with electrons, photons and nucleons – gAegAN≤(1.0–2.4)×10-10 at mA≤450 keV and gAγgAN≤5×10-9 GeV-1 at mA≤10 keV are obtained (90%c.l.). For heavy axions with mass at 100
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
