Results from a search for the0 νββ-decay ofTe130

Abstract

Corresponding author exist scenarios in which the effective Majorana mass of the electron neutrino could be larger than 0.05 eV. Recent developments in detector technology make the observation of 0 νββ decay at this scale now feasible. For recent comprehensive experimental and theoretical reviews see [4][5][6]. Optimism that a direct observation of 0 νββ decay is possible was greatly enhanced by the observation and measurement of the oscillations of atmospheric neutrinos [7], the confirmation by SuperKamiokande [8] of the deficit of 8 B neutrinos observed by the chlorine experiment [9], the observed deficit of p-p neutrinos by SAGE [10] and GALEX [11], and the results of the SNO experiment [12] that clearly showed that the total flux of 8 B neutrinos from the sun predicted by Bahcall and his coworkers [13] is correct. Finally, the data from the KamLAND

Search for Neutrinoless Double-Beta Decay ofTe130with CUORE-0

“…Profile negative log-likelihood (NLL) curves for CUORE-0, Cuoricino [15][16][17], and their combination.…”

“…Each crystal is instrumented with a neutron-transmutation-doped Ge thermistor [13] to record thermal pulses and a silicon heater to generate reference pulses [14]. The tower is deployed in Hall A of LNGS and exploits the cryogenic system, shielding configuration, and electronics from a predecessor experiment, Cuoricino [15][16][17].…”

Search for neutrinoless β+EC decay of Te120 with CUORE-0

“…[28]. CUORE-0 used the same cryostat and shielding as Cuoricino [29,30]. The shielding consists of two external layers of low radioactivity lead for a total thickness of 20 cm and a 1.2-cm internal layer of cold ancient Roman lead [31].…”

Large ν ‐ ν ¯ $$ \nu \hbox{-} \overline{\nu} $$ oscillations from high-dimensional lepton number violating operator

“…As a result, it is concluded that the new long-range mode induced by O 7 gives the dominant contribution to the 0νββ decays in the present scenario. By comparing the current experimental limits on the 0νββ half-life of different nuclei [64][65][66][67][68][69][70], we can actually give the strong constraints to the Wilson coefficient C ud ee by assuming Λ ∼ 1 TeV. The numerical limits are collected in table 1, from which it is seen that the strongest constraint is given by the target 136 Xe [65,66] with |C ud ee | < 1.9 × 10 −4 .…”