Disconnected contribution to the LO HVP term of muon g-2 from ETMC
Constantia Alexandrou, Simone Bacchio, Petros Dimopoulos, Jacob, Finkenrath, Roberto Frezzotti, Giuseppe Gagliardi, Marco Garofalo, Kyriakos, Hadjiyiannakou, Bartosz Kostrzewa, Karl Jansen, Vittorio Lubicz, Marcus, Petschlies, Francesco Sanfilippo, Silvano Simula, Carsten Urbach
TL;DR
This paper calculates the disconnected contributions to the muon g-2's leading-order hadronic vacuum polarization using lattice QCD with physical quark masses, multiple lattice spacings, and ETMC gauge ensembles.
Contribution
It provides a lattice QCD determination of disconnected contributions to muon g-2, focusing on short and intermediate time-distance windows, with continuum extrapolation.
Findings
Disconnection contributions quantified in specific time windows.
Use of physical-mass quark ensembles improves accuracy.
Continuum limit achieved with three lattice spacings.
Abstract
We present a lattice determination of the disconnected contributions to the leading-order hadronic vacuum polarization (HVP) to the muon anomalous magnetic moment in the so-called short and intermediate time-distance windows. We employ gauge ensembles produced by the Extended Twisted Mass Collaboration (ETMC) with flavours of Wilson twisted-mass clover-improved quarks with masses approximately tuned to their physical value. We take the continuum limit employing three lattice spacings at about 0.08, 0.07 and 0.06 fm.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Computational Physics and Python Applications · High-Energy Particle Collisions Research