arXiv:2304.08042·v4·High Energy Physics — Phenomenology
Constraints on NJL four-fermion effective interactions from neutrinoless double beta decay
Luca Pacioselli (1 and 2)🇮🇹 · Orlando Panella (2)🇮🇹 · Matteo Presilla (3)🇮🇹 · She-Sheng Xue (2, 4, 5 and 6) ((1) Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, (2) INFN Sezione di Perugia, (3) Institute for Experimental Particle Physics (ETP), Karlsruhe Institute of Technology, Karlsruhe, Germany, (4) ICRANet, Pescara, (5) Dipartimento di Fisica, Sapienza-Università di Roma, (6) ICTP-AP, University of Chinese Academy of Sciences, Beijing, China)🇮🇹
Abstract
We study the contribution of a heavy right-handed Majorana neutrino to neutrinoless double beta decay () via four-fermion effective interactions of Nambu-Jona-Lasinio (NJL) type. In this physical scenario, the sterile neutrino contributes to the nuclear transition through gauge, contact, and mixed interactions. Using the lower limit on the half-life of from the KamLAND-Zen experiment, we then constrain the effective right-handed coupling between the sterile neutrino and the boson: . Eventually, we show that the obtained bounds are compatible with those found in the literature, which highlights the complementarity of this type of phenomenological study with high-energy experiments.
Comments: 19 pages, 6 figures. Version published by JHEP; typos corrected, minor style changes, 3 repeated references removed, Acknowledgments section added