Progress in the Nucleon Electric Dipole Moment Calculations in Lattice QCD

Autor:	Syritsyn, S., Izubuchi, T., Ohki, H.
Rok vydání:	2018
Předmět:	High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory
Druh dokumentu:	Working Paper
Popis:	Electric dipole moments (EDMs), which are sought as evidence of CP violation, require lattice calculations to connect constraints from experiments to limits on the strong CP violation within QCD or CP violation in new physics beyond the standard model. Nucleon EDM calculations on a lattice are notoriously hard due to large statistical noise, chiral symmetry violating effects, and potential mixing of the EDM and the anomalous magnetic moment of the nucleon. In this report, details of ongoing lattice calculations of proton and neutron EDMs induced by the QCD $\theta$-term and the quark chromo-EDM, the lowest-dimension effective CP-violating quark-gluon interaction are presented. Our calculation employs chiral-symmetric fermion discretization. An assessment of feasibility of nucleon EDM calculations at the physical point is discussed. Comment: proceedings for conference CIPANP 2018 (Palm Springs); 13 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1810.03721 Zobrazit plný text záznamu View this record from Arxiv