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http://hdl.handle.net/2080/3852
Title: | Study of Neutrinoless Double Beta Decay & Lepton Flavour Violation in Standard Model Extended with Sterile Neutrinos |
Authors: | Das, Debashree Priyadarsini Mishra, Sasmita |
Keywords: | Sterile Neutrinos Neutrinoless Double Beta Decay Lepton Flavour Violation |
Issue Date: | Dec-2022 |
Citation: | XXV DAE-BRNS High Energy Physics (HEP) Symposium, IISER Mohali, 12–16 December 2022 |
Abstract: | Existence of non-interacting fermion singlets, known as sterile neutrinos, are contextualised in beyond standard model physics. From accommodating oscillation anomalies to play a role of messenger for neutrino mass generation mechanism through type-I seesaw, they have blossomed as a key ingredient with their several mass variants. In addition, being a standard model singlet, they are accessible to acquire majorana type mass and hence triggers lepton number violation (LNV} and charged lepton flavour violation (cLFV) processes. Driven by this fact, we are intended to work with incorporation of 3 sterile states N;, i = 1, 2, 3 with mass IV!;, i = 1, 2, 3 along with the standard model active neutrinos, thus presenting a 3+3 model for calculation of the effective mass lmee I of neutrino less double beta (Ov{:3(:3) decay which comes as prior of interest in the context ofLNV pro cess. We have derived the analytical forms for the added sterile states using exact seesaw relation. In this context, the additional cp violating (CPV) phases and active-sterile mixing angle values are also explored. Following the experimental limit of lmeel, we have obtained the involved sterile states in the KeV-MeV range. Interestingly, most of the KeV range sterile stated are found to follow the hierarchical pattern i.e., for NH (M1 > lvI2 > !11[3) and for IH (/v/1 < !11[2 < /tl[3). We have also checked the reliability of our result by calculating the branching ratio ofµ eAf, a prominent cLFV process, in the 3+3 framework. Significant results on BR(µ e"f) are found for KeV range sterile neutrinos with their corresponding CPV phase and active-sterile mixing angle values. |
Description: | Copyright belongs to proceeding publisher |
URI: | http://hdl.handle.net/2080/3852 |
Appears in Collections: | Conference Papers |
Files in This Item:
File | Description | Size | Format | |
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2022_DAE-BRNS-HEP_DPDas_Study.pdf | 4.84 MB | Adobe PDF | View/Open |
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