Solar neutrino detection sensitivity in DARWIN via electron scattering
Solar neutrino detection sensitivity in DARWIN via electron scattering
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DOI：
10.1140/epjc/s10052-020-08602-7
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发表时间：
2020-12-01
影响因子：
4.4
通讯作者：
Zuber, K.
中科院分区：
文献类型：
--
作者：
Aalbers, J.;Agostini, F.;Zuber, K.
我们详细描述了拟议的液态氙达尔文天文台通过弹性电子散射对太阳中微子的敏感性。我们发现，达尔文将有可能测量五个太阳中微子成分的通量：PP，7Be，13N，15O和PEP。136Xe的双β衰变阻碍了13N、15O和PEP组分的精度，因此，将受益于耗尽的靶。对pp中微子的高统计观测将使我们第一次用10年的活体数据和30吨的基准体积，在几keV到200keV的电子反冲能区，首次推断出电子弱混合角sin2θw和电子型中微子存活几率Pee的值，相对精度分别为5%和4%。对pp和7Be中微子的观测将把中微子推断的太阳光度限制在0.2%。所有通量测量的组合将区分具有2.1-2.5西格玛意义的高金属丰度(GS98)和低金属丰度(AGS09)太阳模型，独立于其他实验的外部测量或达尔文通过相干弹性中微子-核散射对8B中微子的测量。最后，我们证明了在目标耗尽的情况下，达尔文可能对131Xe的中微子俘获过程很敏感。
We detail the sensitivity of the proposed liquid xenon DARWIN observatory to solar neutrinos via elastic electron scattering. We find that DARWIN will have the potential to measure the fluxes of five solar neutrino components: pp, 7Be, 13N, 15O and pep. The precision of the 13N, 15O and pep components is hindered by the double-beta decay of 136Xe and, thus, would benefit from a depleted target. A high-statistics observation of pp neutrinos would allow us to infer the values of the electroweak mixing angle, sin2 theta w, and the electron-type neutrino survival probability, Pee, in the electron recoil energy region from a few keV up to 200 keV for the first time, with relative precision of 5% and 4%, respectively, with 10 live years of data and a 30 tonne fiducial volume. An observation of pp and 7Be neutrinos would constrain the neutrino-inferred solar luminosity down to 0.2%. A combination of all flux measurements would distinguish between the high- (GS98) and low-metallicity (AGS09) solar models with 2.1-2.5 sigma significance, independent of external measurements from other experiments or a measurement of 8B neutrinos through coherent elastic neutrino-nucleus scattering in DARWIN. Finally, we demonstrate that with a depleted target DARWIN may be sensitive to the neutrino capture process of 131Xe.