6 papers
corrections to self-dual gravitational instantons
José Luis V. Cerdeira, Cristóbal Corral, Tomás OrtÃn
We study the corrections to self-dual gravitational instantons in the context of the four-dimensional Cano--Ruipérez action, which can be obtained by the compactification of…
Higher-form symmetries in supergravity, scalar charges and black-hole thermodynamics
Gabriele Barbagallo, José Luis V. Cerdeira, Carmen Gómez-Fayrén +2
Minimal 5-dimensional supergravity compactified on a circle gives the T model of supergravity, whose duality group is SL. We study exhaust…
The Komar charge in presence of the Holst term and the gravitational Witten effect
José Luis V. Cerdeira, Tomás OrtÃn
In the first-order formalism, the Einstein--Hilbert action can be modified by the addition of a Holst term multiplied by the Barbero parameter . This modification breaks parity…
On-shell Lagrangians as total derivatives and the generalized Komar charge
José Luis V. Cerdeira, Tomás OrtÃn
Lagrangians which transform homogeneously under a global transformation of the fields (a global rescaling, for instance) can be written on-shell as a total derivative which has a u…
On the generalized Komar charge of Kaluza-Klein theories and higher-form symmetries
G. Barbagallo, J. L. V. Cerdeira, C. Gómez-Fayrén +2
The generalized Komar -form charge can be modified by the addition of any other on-shell closed (conserved) -form charge. We show that, with Kaluza--Klein boundary co…
A note on the calculation of the Komar integral in the Lorentzian Taub-NUT spacetime
Gabriele Barbagallo, José Luis V. Cerdeira, Carmen Gómez-Fayrén +1
It has recently been shown that one can derive consistent thermodynamical expressions in the Lorentzian Taub--NUT spacetime keeping the Misner-string singularities and taking into…