Laboratori Nazionali del Gran Sasso, INFN, Assergi, 67100 L'Aquila, Italy.
Phys Rev Lett. 2013 Jul 12;111(2):022001. doi: 10.1103/PhysRevLett.111.022001. Epub 2013 Jul 9.
The study of the neutral current elastic scattering of neutrinos on protons at lower energies can be used as a compelling probe to improve our knowledge of the strangeness of the proton. We consider a neutrino beam generated from pion decay at rest, as provided by a cyclotron or a spallation neutron source and a 1 kton scintillating detector with a potential similar to the Borexino detector. Despite several backgrounds from solar and radioactive sources, it is possible to estimate two optimal energy windows for the analysis, one between 0.65 and 1.1 MeV and another between 1.73 and 2.2 MeV. The expected number of neutral current events in these two regions, for an exposure of 1 yr, is enough to obtain an error on the strange axial charge 10 times smaller than available at present.
研究中微子在质子上的低能中性电流弹性散射可以作为一种有力的探针，以提高我们对质子奇异性质的认识。我们考虑了由静止的π介子衰变产生的中微子束，这种中微子束可以由回旋加速器或散裂中子源提供，以及一个 1 千吨闪烁探测器，其潜力类似于 Borexino 探测器。尽管存在来自太阳和放射性来源的几个背景，但可以为分析估计两个最佳的能量窗口，一个在 0.65 和 1.1 MeV 之间，另一个在 1.73 和 2.2 MeV 之间。对于 1 年的曝光量，在这两个区域中性电流事件的预期数量足以获得比目前可用的奇异轴电荷误差小 10 倍的结果。
