Hadronic contribution to g-2 from twisted mass fermions
Dru B. Renner, Xu Feng
TL;DR
This paper computes the hadronic vacuum polarization contribution to the muon g-2 using lattice QCD with twisted mass fermions, analyzing systematic effects and providing results at various pion masses.
Contribution
It presents a lattice QCD calculation of the hadronic contribution to g-2 with twisted mass fermions, including analysis of systematic errors and finite size effects.
Findings
Calculated the vacuum polarization tensor for pion masses from 480 MeV to 270 MeV.
Analyzed lattice symmetries and systematic errors affecting the polarization tensor.
Provided estimates for the hadronic g-2 contribution and discussed systematic uncertainties.
Abstract
We calculate the vacuum polarization tensor for pion masses from 480 MeV to 270 MeV using dynamical twisted mass fermions at a lattice spacing of 0.086 fm. We analyze the form of the polarization tensor on the lattice using the symmetries of twisted QCD and we study both finite size effects and lattice artifacts at a pion mass of 310 MeV. Results for the lowest order hadronic contribution to g-2 are presented and the impact of systematic errors is discussed.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Nuclear physics research studies