Implications of the muon anomalous magnetic moment for the LHC and MUonE

Bhardwaj, A., Englert, C. and Stylianou, P. (2022) Implications of the muon anomalous magnetic moment for the LHC and MUonE. Physical Review D, 106(7), 075031. (doi: 10.1103/PhysRevD.106.075031)

Abstract

We consider the anomalous magnetic moment of the muon a μ , which shows a significant deviation from the Standard Model expectation given the recent measurements at Fermilab and Brookhaven National Lab (BNL). We focus on Standard Model effective field theory (SMEFT) with the aim to identify avenues for the upcoming LHC runs and future experiments such as MUonE. To this end, we include radiative effects to a μ in SMEFT to connect the muon anomaly to potentially interesting searches at the LHC, specifically Higgs decays into muon pairs and such decays with resolved photons. Our investigation shows that, similar to results for concrete UV extensions of the Standard Model, the Fermilab/BNL result can indicate strong coupling within the EFT framework and a μ is increasingly sensitive to a single operator direction for high scale UV completions. In such cases, there is some complementarity between expected future experimental improvements, yet with considerable statistical challenges to match the precision provided by the recent a μ measurement.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Stylianou, Mr Panagiotis and Bhardwaj, Dr Akanksha and Englert, Professor Christoph
• Authors: Bhardwaj, A., Englert, C., and Stylianou, P.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review D
• Publisher: American Physical Society
• ISSN: 2470-0010
• ISSN (Online): 2470-0029
• Published Online: 31 October 2022
• Copyright Holders: Copyright © 2022 American Physical Society
• First Published: First published in Physical Review D 106(7): 075031
• Publisher Policy: Reproduced under a Creative Commons License

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
306883		Research in Particle Physics Theory - Phenomenology from lattice QCD and collider physics	Christine Davies	Science and Technology Facilities Council (STFC)	ST/T000945/1	P&S - Physics & Astronomy
311961		BSM interference effects in Higgs and Top-associated final states.	Christoph Englert	Leverhulme Trust (LEVERHUL)	RPG-2021-031	P&S - Physics & Astronomy
308821		STFC Glasgow 2019 DTP	Martin Hendry	Science and Technology Facilities Council (STFC)	ST/T506102/1	P&S - Physics & Astronomy