RPV SUSY诱导的无中微子双β衰变中的π介子优势
Pion dominance in RPV SUSY induced neutrinoless double beta decay
摘要:
在夸克水平上,R宇称违反超对称性(RPV SUSY)对无中微子双β衰变的贡献主要有两种:只涉及重虚超伴子的短程贡献和涉及虚夸克和中微子的长程贡献。对应于这两种贡献的有效算符的强子化,一般来说,除了质量壳层上的核子外,还可能涉及虚π介子。已知短程贡献由π介子交换主导。在本文中,我们表明,这也是正确的远程RPV超对称性的贡献,因此,RPV超对称性贡献的无中微子双β衰变主要是通过带电荷的π衰变核子之间的交换。
英文摘要:
At the quark level there are basically two types of contributions of R-parity violating SUSY (RPV SUSY) to neutrinoless double beta decay: the short-range contribution involving only heavy virtual superpartners and the long-range one with the virtual squark and neutrino. Hadronization of the effective operators, corresponding to these two types of contributions, may in general involve virtual pions in addition to the close on-mass-shell nucleons. It is known that the short-range contribution is dominated by the pion exchange. In the present paper we show that this is also true for the long-range RPV SUSY contribution and, therefore, the RPV SUSY contributes to the neutrinoless double beta decay dominantly via charged pion exchange between the decaying nucleons.
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