Searching for Leptoquarks at IceCube and the LHC

TL;DR

This paper investigates scalar leptoquark models in light of recent IceCube and LHC data, analyzing their compatibility with flavor anomalies and experimental constraints, and identifying parameter regions consistent with observations.

Contribution

It provides a combined analysis of IceCube and LHC data on scalar leptoquarks, constraining models explaining flavor anomalies without third-generation couplings.

Findings

Lighter leptoquarks are strongly constrained by LHC searches.

Heavier leptoquarks in the TeV range are compatible with both IceCube and LHC.

Leptoquarks explaining B-physics anomalies without third-generation couplings face strong constraints.

Abstract

In the light of recent experimental results from IceCube, LHC searches for scalar leptoquark, and the flavor anomalies $R_K$ and $R_{K^*}$, we analyze two scalar leptoquark models with hypercharge $Y=1/6$ and $Y=7/6$. We consider the 53 high-energy starting events from IceCube and perform a statistical analysis, taking into account both the Standard Model and leptoquark contribution together. The lighter leptoquark states that are in agreement with IceCube are strongly constrained from LHC di-lepton+dijet search. Heavier leptoquarks in the TeV mass range are in agreement both with IceCube and LHC. We furthermore show that leptoquark which explains the $B$-physics anomalies and does not have any coupling with the third generation of quarks and leptons, can be strongly constrained.