论文标题
一般性中微子与无菌中微子相互作用,鉴于相干中微子核散射和中微子的衰变
General neutrino interactions with sterile neutrinos in light of coherent neutrino-nucleus scattering and meson invisible decays
论文作者
论文摘要
在这项工作中,我们研究了CEνNS过程中的当前界限和在有效田间理论中与无菌中微子的通用中微子相互作用上的无形性中微子相互作用。夸克与左手中微子和/或右手中微子之间的相互作用首先是由伊莱克克量表和手性对称性破坏量表之间的低能量有效田间理论(LNEFT)描述的。我们通过包括Lepton-number Conserving(LNC)和Lepton-number-violating(LNV)操作员(涉及右撇子中微子)来完成LNEFT至Dimension-6的独立操作员基础。我们从连贯的观察结果转换了LNEFT Wilson系数上的边界,并计算出光中膜隐形衰变的分支部分。然后,使用无菌中微子(SMNEFT)将LNEFT上的边界映射到SM有效场理论上,以将新物理学限制在电子量表之上。我们发现,介子不可见的衰减可以为Quark-Neutrino相互作用中的τ中微子风味分量和S Quark分量提供唯一的敏感探针,涉及两个(一个)活跃的中微子,以及没有任何活性中微子领域的有效操作员。 CEνNS过程对所有其他Wilson系数都限制了最严格的束缚。通过假设一次在SMNEFT和可忽略的无菌中微子质量的Wilson系数中,新物理量表上最严格的限制为2.7-10 TEV,来自LNEFT中的相应偶极子操作员,来自Lneft中的Neutmrino -Quark Operator的0.5-1.5-1.5 Tev。
In this work we study the current bounds from the CEνNS process and meson invisible decays on generic neutrino interactions with sterile neutrinos in effective field theories. The interactions between quarks and left-handed SM neutrinos and/or right-handed neutrinos are first described by the low-energy effective field theory (LNEFT) between the electroweak scale and the chiral symmetry breaking scale. We complete the independent operator basis for the LNEFT up to dimension-6 by including both the lepton-number-conserving (LNC) and lepton-number-violating (LNV) operators involving right-handed neutrinos. We translate the bounds on the LNEFT Wilson coefficients from the COHERENT observation and calculate the branching fractions of light meson invisible decays. The bounds on LNEFT are then mapped onto the SM effective field theory with sterile neutrinos (SMNEFT) to constrain new physics above the electroweak scale. We find that the meson invisible decays can provide the only sensitive probe for τ neutrino flavor component and s quark component in the quark-neutrino interactions involving two (one) active neutrinos and for the effective operators without any active neutrino fields. The CEνNS process places the most stringent bound on all other Wilson coefficients. By assuming one dominant Wilson coefficient at a time in SMNEFT and negligible sterile neutrino mass, the most stringent limits on the new physics scale are 2.7 - 10 TeV from corresponding dipole operator in LNEFT and 0.5 - 1.5 TeV from neutrino-quark operator in LNEFT.