The origin of tiny neutrino mass is an unsolved puzzle leading to a variety of phenomenological aspects beyond the Standard Model (BSM). We consider U (1) gauge extension of the Standard Model (SM) where so-called see- saw mechanism is incarnated with the help of thee gen- erations of Majorana type right-handed neutrinos followed by the breaking of U (1) and electroweak gauge symme- tries providing anomaly free structure. In this framework, a neutral BSM gauge boson Z′ is evolved. To explore the properties of its interactions we consider chiral (flavored) frameworks where Z′ interactions depend on the handed- ness (generations) of the fermions. In this paper we focus on Z′-neutrino interactions which could be probed from cos- mic explosions. We consider νν → e+e− process which can energize gamma-ray burst (GRB221009A, so far the highest energy) through energy deposition. Hence estimat- ing these rates we constrain U (1) gauge coupling (gX ) and Z′ mass (MZ′ ) under Schwarzchild (Sc) and Hartle-Thorne (HT) scenarios. We also study ν-DM scattering through Z′ to constrain gX − MZ′ plane using IceCube data considering high energy neutrinos from cosmic blazar (TXS0506+056), active galaxy (NGC1068), the Cosmic Microwave Back- ground (CMB) and the Lyman-α data, respectively. Finally highlighting complementarity we compare our results with current and prospective bounds on gX − MZ′ plane from scattering, beam-dump and g − 2 experiments.
Probing chiral and flavored $$Z^\prime $$ from cosmic bursts through neutrino interactions
Lambiase, GaetanoMembro del Collaboration Group
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2024-01-01
Abstract
The origin of tiny neutrino mass is an unsolved puzzle leading to a variety of phenomenological aspects beyond the Standard Model (BSM). We consider U (1) gauge extension of the Standard Model (SM) where so-called see- saw mechanism is incarnated with the help of thee gen- erations of Majorana type right-handed neutrinos followed by the breaking of U (1) and electroweak gauge symme- tries providing anomaly free structure. In this framework, a neutral BSM gauge boson Z′ is evolved. To explore the properties of its interactions we consider chiral (flavored) frameworks where Z′ interactions depend on the handed- ness (generations) of the fermions. In this paper we focus on Z′-neutrino interactions which could be probed from cos- mic explosions. We consider νν → e+e− process which can energize gamma-ray burst (GRB221009A, so far the highest energy) through energy deposition. Hence estimat- ing these rates we constrain U (1) gauge coupling (gX ) and Z′ mass (MZ′ ) under Schwarzchild (Sc) and Hartle-Thorne (HT) scenarios. We also study ν-DM scattering through Z′ to constrain gX − MZ′ plane using IceCube data considering high energy neutrinos from cosmic blazar (TXS0506+056), active galaxy (NGC1068), the Cosmic Microwave Back- ground (CMB) and the Lyman-α data, respectively. Finally highlighting complementarity we compare our results with current and prospective bounds on gX − MZ′ plane from scattering, beam-dump and g − 2 experiments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
