عنوان

Improved measurement of electron antineutrino disappearance at Daya Bay

شماره

LA1d79t0j5

عنوان اصلي

Improved measurement of electron antineutrino disappearance at Daya Bay

نام عام مواد

[Article]

نام نخستين پديدآور

An, FP; An, Q; Bai, JZ; Balantekin, AB; Band, HR; Beriguete, W; Bishai, M; Blyth, S; Brown, RL; Cao, GF; Cao, J; Carr, R; Chan, WT; Chang, JF; Chang, Y; Chasman, C; Chen, HS; Chen, HY; Chen, SJ; Chen, SM; Chen, XC; Chen, XH; Chen, XS; Chen, Y; Chen, YX; Cherwinka, JJ; Chu, MC; Cummings, JP; Deng, ZY; Ding, YY; et al.

متن يادداشت

We report an improved measurement of the neutrino mixing angle θ13 from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for sin22θ13 with a significance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GW th were detected in six antineutrino detectors deployed in two near (flux-weighted baselines of 470 m and 576 m) and one far (1648 m) underground experimental halls. Using 139 days of data, 28909 (205308) electron antineutrino candidates were detected at the far hall (near halls). The ratio of the observed to the expected number of antineutrinos assuming no oscillations at the far hall is 0.944±0.007(stat.)±0.003(syst.). An analysis of the relative rates in six detectors finds sin22θ13=0. 089±0.010(stat.)±0.005(syst.) in a three-neutrino framework. © 2013 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

تاريخ نشر

2013

عنوان

UCLA

نام الکترونيکي

نوع ماده

[Article]

کد کاربرگه

275578

سطح دسترسي

a

تكميل شده

Y