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arXiv 0810.3760nucl-ex
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萨德伯里中微子观测站中子探测器阵列测量太阳中微子通量

Measurement of the Solar Neutrino Flux with an Array of Neutron Detectors in the Sudbury Neutrino Observatory

Blair Jamieson

摘要:

萨德伯里中微子天文台使用一组3 He正比计数器测量了$^8$ B太阳中微子通量。使用马尔可夫链蒙特卡罗(MCMC)参数估计获得的结果,在标准扩展似然上积分,产生有效中微子通量:phi_nc=5.54+0.33-0.31(stat)+0.36-0.34(syst)x 10^6 /cm^2/s,phi_cc=1.67+0.05-0.04(stat)+0.07-0.08(syst)x 10^6 /cm^2/s,φ_s =1.77+0.24-0.21(静态)+0.09-0.10(系统)× 106/cm ~ 2/s。这些测量结果与以前的太阳中微子通量测量和中微子振荡模型的结果是一致的。将这些通量测量结果纳入太阳和反应堆中微子结果的全局分析中,可以提高太阳中微子混合角的精度,即θ =34.4+1.3-1.2度,Δ m^2=7.59+0.19-0.21 eV^2。

英文摘要:

The Sudbury Neutrino Observatory has measured the $^8$B solar neutrino flux using an array of 3He proportional counters. Results obtained using a Markov-Chain Monte-Carlo (MCMC) parameter estimation, integrating over a standard extended likelihood, yield effective neutrino fluxes of: phi_nc=5.54+0.33-0.31(stat)+0.36-0.34(syst) x 10^6 /cm^2/s, phi_cc=1.67+0.05-0.04(stat)+0.07-0.08(syst) x 10^6 /cm^2/s, and phi_es=1.77+0.24-0.21(stat)+0.09-0.10(syst) x 10^6 /cm^2/s. These measurements are in agreement with previous solar neutrino flux measurements, and with neutrino oscillation model results. Including these flux measurements in a global analysis of solar and reactor neutrino results yields an improved precision on the solar neutrino mixing angle of theta=34.4+1.3-1.2 degrees, and Delta m^2=7.59+0.19-0.21 eV^2.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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