Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Coelho, Flávio S."'
We analyse the causal structure of the two dimensional (2D) reduced background used in the perturbative treatment of a head-on collision of two $D$-dimensional Aichelburg-Sexl gravitational shock waves. After defining all causal boundaries, namely th
Externí odkaz:
http://arxiv.org/abs/1604.02154
Autor:
Coelho, Flávio S.
Publikováno v:
PhD Thesis, University of Aveiro, 2015
Classically, if two highly boosted particles collide head-on, a black hole is expected to form whose mass may be inferred from the gravitational radiation emitted during the collision. If this occurs at trans-Planckian energies, it should be well des
Externí odkaz:
http://arxiv.org/abs/1505.01978
Autor:
Berti, Emanuele, Barausse, Enrico, Cardoso, Vitor, Gualtieri, Leonardo, Pani, Paolo, Sperhake, Ulrich, Stein, Leo C., Wex, Norbert, Yagi, Kent, Baker, Tessa, Burgess, C. P., Coelho, Flávio S., Doneva, Daniela, De Felice, Antonio, Ferreira, Pedro G., Freire, Paulo C. C., Healy, James, Herdeiro, Carlos, Horbatsch, Michael, Kleihaus, Burkhard, Klein, Antoine, Kokkotas, Kostas, Kunz, Jutta, Laguna, Pablo, Lang, Ryan N., Li, Tjonnie G. F., Littenberg, Tyson, Matas, Andrew, Mirshekari, Saeed, Okawa, Hirotada, Radu, Eugen, O'Shaughnessy, Richard, Sathyaprakash, Bangalore S., Broeck, Chris Van Den, Winther, Hans A., Witek, Helvi, Aghili, Mir Emad, Alsing, Justin, Bolen, Brett, Bombelli, Luca, Caudill, Sarah, Chen, Liang, Degollado, Juan Carlos, Fujita, Ryuichi, Gao, Caixia, Gerosa, Davide, Kamali, Saeed, Silva, Hector O., Rosa, João G., Sadeghian, Laleh, Sampaio, Marco, Sotani, Hajime, Zilhao, Miguel
Publikováno v:
Class. Quantum Grav. 32, 243001 (2015)
One century after its formulation, Einstein's general relativity has made remarkable predictions and turned out to be compatible with all experimental tests. Most of these tests probe the theory in the weak-field regime, and there are theoretical and
Externí odkaz:
http://arxiv.org/abs/1501.07274
In two previous papers we have computed the inelasticity $\epsilon$ in a head-on collision of two $D$-dimensional Aichelburg-Sexl shock waves, using perturbation theory to calculate the geometry in the future light-cone of the collision. The first or
Externí odkaz:
http://arxiv.org/abs/1410.0964
Publikováno v:
Phys. Rev. D 90, 064040 (2014)
n-DBI gravity explicitly breaks Lorentz invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree of freedom. We look for observational consequences of this mode in two setups. Firstly, we comput
Externí odkaz:
http://arxiv.org/abs/1307.4598
We present a new model of gravity which explicitly breaks Lorentz-invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree of freedom. We discuss its cosmology, exact solutions and the dynamics
Externí odkaz:
http://arxiv.org/abs/1301.4045
Recently, in arXiv:1110.0832, we have established that solutions of Einstein's gravity admitting foliations with a certain geometric condition are also solutions of n-DBI gravity, arXiv:1109.1468. Here we observe that, in vacuum, the required geometr
Externí odkaz:
http://arxiv.org/abs/1301.1070
The collision of two D-dimensional, ultra-relativistic particles, described in General Relativity as Aichelberg-Sexl shock waves, is inelastic. In first order perturbation theory, the fraction of the initial centre of mass energy radiated away was re
Externí odkaz:
http://arxiv.org/abs/1206.5839
n-DBI gravity is a gravitational theory which yields near de Sitter inflation spontaneously at the cost of breaking Lorentz invariance by a preferred choice of foliation. We show that this breakdown endows n-DBI gravity with one extra physical gravit
Externí odkaz:
http://arxiv.org/abs/1205.6850
Recently, in arXiv:1105.2298 [hep-th], we have estimated the energy radiated in the head-on collision of two equal D-dimensional Aichelburg-Sexl shock waves, for even D, by solving perturbatively, to first order, the Einstein equations in the future
Externí odkaz:
http://arxiv.org/abs/1203.5355