Constraints on Leptoquark Models from IceCube Data

TL;DR

This paper investigates how IceCube neutrino data can constrain leptoquark models with masses between 500-1000 GeV, focusing on resonant production and decay signatures in PeV energy events.

Contribution

It provides the first detailed analysis of IceCube data to set bounds on leptoquark parameters within a specific low-scale quark-lepton unification model.

Findings

Constraints on leptoquark mass and coupling parameters from IceCube data.

Identification of potential leptoquark signals in future PeV neutrino events.

Exclusion regions in the model's parameter space.

Abstract

Leptoquarks in the mass range of 500-1000 GeV can be resonantly produced in significant numbers by PeV neutrino interacting with nuclei at IceCube. We compute the event rates of leptoquark production and decay events and use the 3-year IceCube data for PeV energy events to find the allowed range of the leptoquarks mass and coupling parameter space. We use a low-scale quark lepton unification model based on the $SU(4)_C \otimes SU(2)_L\otimes U(1)_R$ gauge group where leptoquark couplings which give rise to proton decay are forbidden by the symmetry. We constrain the parameters of this model and point out signals of leptoquarks in this model which may be seen in PeV energy IceCube events in the future.