Limit on the Electron Neutrino Magnetic Moment from the Kuo-Sheng Reactor Neutrino Experiment

Abstract

A search of neutrino magnetic moment was carried out at the Kuo-Sheng Nuclear Power Station at a distance of 28 m from the 2.9 GW reactor core. With a high purity germanium detector of mass 1.06 kg surrounded by scintillating NaI(Tl) and CsI(Tl) crystals as anti-Compton detectors, a detection threshold of 5 keV and a background level of 1 kg(-1) keV(-1) day(-1) at 12-60 keV were achieved. Based on 4712 and 1250 h of reactor ON and OFF data, respectively, the limit on the neutrino magnetic moment of mu(nu;(e))<1.3x10(-10)mu(B) at 90% confidence level was derived. An indirect bound of the nu;(e) radiative lifetime of m(3)(nu)tau(nu)>2.8x10(18) eV(3) s can be inferred.

Hyperbolic metamaterials: From dispersion manipulation to applications

“…In other words, in the traditional 1D PC, the gap edges change with the incident angles and the gap would even close at Brewster angle. To overcome this problem, the omnidirectional gaps independent of the incident angles are proposed in special 1D PCs, including the average index (zeron ) gap under the mechanism of the phase cancellation of propagating waves between positive-and negative-index materials [229][230][231][232][233] and zero effective phase (zeroeff  ) gap under the mechanism of the compensation of the exponentially increasing and decreasing waves in two kinds 40 of single-negative materials [234][235][236][237].…”

Light vectors coupled to bosonic currents

“…Neutrino scattering and APV are insensitive to the longitudinal mode of X, and at very small m X the constraints are m X -independent. The most powerful limits from ν e − e scattering are from a combination of the TEXONO [37][38][39][40], LSND [41], BOREXINO [42], GEMMA [43], and CHARM II [44] experiments. Ref.…”

Modified dielectric properties of poly(vinylidene fluoride) via 2S fraction of soy protein

“…Considering the reduced crystallinity of the polar β phase in the 2S-2 films, it is highly likely that such an increase was related to the Maxwell-Wagner-Sillars (MWS) interfacial polarization mechanism. 42,43 When adding 2 wt % 2S protein to PVDF, large interfacial areas were generated between 2S and PVDF, causing a higher dielectric constant. Due to the tendency to protein aggregation at higher protein concentration, the increase in interfacial areas between PVDF and 2S might not be significant enough to induce stronger interfacial polarization under the applied field.…”