A high sensitivity search for electron anti-neutrinos from the sun and other sources at Kamland

摘要: Data corresponding to a KamLAND detector exposure of 0.28 kton-year has been used search for {bar {nu}}{sub e}'s in the energy range 8.3 MeV < E{sup e}} 14.8 MeV. No candidates were found an expected background 1.1 {+-} 0.4 events. This result can be obtain limit on e} fluxes any origin. Assuming that all flux its origin Sun and characteristic {sup 8}B solar {nu}{sub spectrum, we upper 3.7 x 10{sup 2} cm{sup -2} s{sup -1} (90 percent C.L.) flux. We interpret this limit, 2.8 -4} Standard Solar Model flux, framework spin-flavor precession neutrino decay models.