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ABSTRACT The search of the QCD critical point is one of the interesting issues both in theoretical and experimental particle physics. In this article, we use the Nambu Jona-Lasinio model to study the UV-cutoff effects on the critical... more
ABSTRACT The search of the QCD critical point is one of the interesting issues both in theoretical and experimental particle physics. In this article, we use the Nambu Jona-Lasinio model to study the UV-cutoff effects on the critical surface which may play a crucial role to the possible existence/non-existence of the critical point. Then we compare the indications between the results obtained through our effective approach and the lattice QCD simulations.
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Research Interests: Field Theory, Physics, Quantum Physics, Quantum Chromodynamics, Quantum Field Theory, and 14 moreLattice Field Theory, Critical phenomena, Curvature, Phase transition, First-Order Logic, Physical, Lattice QCD, Phase Transformation, Model Analysis, Finite Temperature, Physical Properties, Elementary Particles, Chemical Potential, and cutoff
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With the advent of detectors with sub-keV sensitivities, atomic ionization has been identified as a promising avenue to probe possible neutrino electromagnetic properties. The interaction cross-sections induced by millicharged neutrinos... more
With the advent of detectors with sub-keV sensitivities, atomic ionization has been identified as a promising avenue to probe possible neutrino electromagnetic properties. The interaction cross-sections induced by millicharged neutrinos are evaluated with the ab-initio multi-configuration relativistic random-phase approximation. There is significant enhancement at atomic binding energies compared to that when the electrons are taken as free particles. Positive signals would distinctly manifest as peaks at specific energies with known intensity ratios. Selected reactor neutrino data with germanium detectors at analysis threshold as low as 300 eV are studied. No such signatures are observed, and a combined limit on the neutrino charge fraction of $| \numq | < 1.0 \times 10^{-12}$ at 90% confidence level is derived.
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We derive a semi-classical effective action for massive Dirac fermions in electromagnetic fields. We present two approaches to the effective action -- the path integral approach and the Dirac Lagrangian approach. The non-Abelian Berry... more
We derive a semi-classical effective action for massive Dirac fermions in electromagnetic fields. We present two approaches to the effective action -- the path integral approach and the Dirac Lagrangian approach. The non-Abelian Berry phase structure emerges from two helicity states of massive fermions with positive energy. The pseudo-spin also emerges as a vector in SU(2) helicity space. The continuity equations for the fermion number and the helicity are derived. The fermion number is conserved while the helicity charge is not conserved by anomaly. Previous results about the coefficients of the chiral magnetic effect for the fermion and axial currents in the chiral limit can be reproduced after including the anti-fermion contributions.