Effective field theory interpretation of lepton magnetic and electric dipole moments

Autor:	Aebischer, Jason, Dekens, Wouter, Jenkins, Elizabeth E., Manohar, Aneesh V., Sengupta, Dipan, Stoffer, Peter
Rok vydání:	2021
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Experiment
Zdroj:	JHEP 07 (2021) 107
Druh dokumentu:	Working Paper
DOI:	10.1007/JHEP07(2021)107
Popis:	We perform a model-independent analysis of the magnetic and electric dipole moments of the muon and electron. We give expressions for the dipole moments in terms of operator coefficients of the low-energy effective field theory (LEFT) and the Standard Model effective field theory (SMEFT). We use one-loop renormalization group improved perturbation theory, including the one-loop matching from SMEFT onto LEFT, and one-loop lepton matrix elements of the effective-theory operators. Semileptonic four-fermion operators involving light quarks give sizable non-perturbative contributions to the dipole moments, which are included in our analysis. We find that only a very limited set of the SMEFT operators is able to generate the current deviation of the magnetic moment of the muon from its Standard Model expectation. Comment: 34 pages, 7 figures; v2: numbers updated to new experimental value for g-2; version published in JHEP
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2102.08954 Zobrazit plný text záznamu View this record from Arxiv