Connecting the Cabbibo-Kobayashi-Maskawa matrix to quark masses
We show that the Cabbibo-Kobayashi-Maskawa interaction matrix may be constructed with the quark masses.
physics.gen-ph↗
arXiv subjects
V. Antunes
Publications and source records attributed to V. Antunes.
Repulsive gravity induced by a conformally coupled scalar field implies a bouncing radiation-dominated universe
In the present work we revisit a model consisting of a scalar field with a quartic self-interaction potential non-minimally (conformally) coupled to gravity [1]. When the scalar field vacuum is in a broken symmetry state, an effective gravitational constant emerges which, in certain regimes, can lead to gravitational repulsive effects when only ordinary radiation is coupled to gravity. In this case, a bouncing universe is shown to be the only cosmological solution admissible by the field equations when the scalar field is in such a broken symmetry state.
gr-qc↗
Gravitational mechanism for baryogenesis in the cosmological QCD phase transition
One of the biggest puzzles in modern cosmology is the observed baryon asymmetry in the universe. In current models of baryogenesis gravity plays a secondary role, although the process is believed to have happened in the early universe, under the influence of an intense gravitational field. In the present work we resume Sakharov's original program for baryogenesis and propose a central role for gravity in the process. This is achieved through a non-minimal coupling (NMC) between the gravitational field and both the strong interaction field and the quark fields. When in action, the present mechanism leads to baryon number non-conservation and CP violation. Moreover, the NMC induces reduced effective quark masses, which favours a first order QCD phase transition. As a consequence, a baryon asymmetry can be attained in the transition from the quark epoch to the hadron epoch.
gr-qc↗