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11 papers · 2 filters
First-order cosmological phase transitions in the radiation dominated era
Ariel Megevand
We consider first-order phase transitions of the Universe in the radiation-dominated era. We argue that in general the velocity of interfaces is non-relativistic due to the interac…
and from Nonrelativistic Renormalization Group
B. A. Kniehl, A. A. Penin, A. Pineda +2
We sum up the next-to-leading logarithmic corrections to the heavy-quarkonium hyperfine splitting using the nonrelativistic renormalization group. On the basis of this result, we p…
Testing the running of the cosmological constant with Type Ia Supernovae at high z
Cristina Espana-Bonet, Pilar Ruiz-Lapuente, Ilya L. Shapiro +1
Within the Quantum Field Theory context the idea of a "cosmological constant" (CC) evolving with time looks quite natural as it just reflects the change of the vacuum energy with t…
Is there a linear potential at short distances?
Antonio Pineda
We argue that the lattice data of the static potential can be explained by perturbation theory up to energies of the order of 1 GeV once renormalons effects are taken into account
QCD phenomenology of static sources and gluonic excitations at short distances
Gunnar S. Bali, Antonio Pineda
New lattice data for the Pi_u and Sigma_u^- potentials at short distances are presented. We compare perturbation theory to the lower static hybrid potentials and find good agreemen…
Two tricritical lines from a Ginzburg-Landau expansion: application to the LOFF phase
R. Casalbuoni, G. Tonini
We study the behavior of the two plane waves configuration in the LOFF phase close to T=0. The study is performed by using a Landau-Ginzburg expansion up to the eighth order in the…