Updated Values of Running Quark and Lepton Masses

TL;DR

This paper updates the values of quark and lepton masses at various energy scales using the latest data, aiding model building in particle physics and neutrino mass generation theories.

Contribution

It provides the most recent running masses of fermions at multiple energy scales, including potential new physics and seesaw scales, based on current experimental data.

Findings

Updated fermion mass values at key energy scales.

Inclusion of potential new physics and seesaw scales.

Provision of a comprehensive table for flavor physics studies.

Abstract

Reliable values of quark and lepton masses are important for model building at a fundamental energy scale, such as the Fermi scale M_Z \approx 91.2 GeV and the would-be GUT scale \Lambda_GUT \sim 2 \times 10^16 GeV. Using the latest data given by the Particle Data Group, we update the running quark and charged-lepton masses at a number of interesting energy scales below and above M_Z. In particular, we take into account the possible new physics scale (\mu \sim 1 TeV) to be explored by the LHC and the typical seesaw scales (\mu \sim 10^9 GeV and \mu \sim 10^12 GeV) which might be relevant to the generation of neutrino masses. For illustration, the running masses of three light Majorana neutrinos are also calculated. Our up-to-date table of running fermion masses are expected to be very useful for the study of flavor dynamics at various energy scales.