arXiv subjects

Alexandre Dominguez-Clarimon

Publications and source records attributed to Alexandre Dominguez-Clarimon.

2 recordsLinked to original sources

arXiv2007

Bounds on the Light Quark Masses: the scalar channel revisited

We evaluate lower bounds on the sum of the up and down quark masses. The bounds follow from the constraints provided by the dispersion relation obeyed by the two--point function of the scalar current density when combined with properties of the scalar spectral function at long--distances and perturbative QCD at short--distances. Our results point to values of $m_u+m_d$ somewhat higher than those reported recently in the literature using lattice QCD simulations.

hep-ph↗

arXiv2003

Decoherence of a particle across a medium: a microscopic derivation

We deduce from a microscopic point of view the equation that describes how the state of a particle crossing a medium decoheres. We apply our results to the example of a particle crossing a gas, computing explicitly the Lindblad operators in terms of the interaction potential between the particle and a target of the medium. We interpret the imaginary part of the refraction index as a loss of quantum coherence, that is reflected in the disappearance of interference patterns in a Young experiment.

quant-ph↗