Low energy spectra in many flavor QCD with Nf=12 and 16

2012/11/28 by Yasumichi Aoki, Aoki, Yasumichi, Tatsumi Aoyama +15
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1211.6651

openalex publication_date 2012/11/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present our result of the many-flavor QCD. Information of the phase structure of many-flavor SU(3) gauge theory is of great interest, since the gauge theories with the walking behavior near the infrared fixed point are candidates of new physics for the origin of the dynamical electroweak symmetry breaking. We study the SU(3) gauge theories with 12 and 16 fundamental fermions. Utilizing the HISQ type action which is useful to study the continuum physics, we analyze the lattice data of the mass and the decay constant of the pseudoscalar meson and the mass of the vector meson as well at several values of lattice spacing and fermion mass. The finite size scaling test in the conformal hypothesis is also performed. Our data is consistent with the conformal scenario for Nf=12. We obtain the mass anomalous dimension γ_m ∼ 0.4-0.5. An update of N_f=16 study is also shown.

Citations

• Many flavor QCD as exploration of the walking behavior with the approximate IR fixed point

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