Zobrazeno 1 - 10
of 172
pro vyhledávání: '"Cembranos, Jose A. R."'
We consider a Bubble Expansion mechanism for the production of scalar dark matter during a first-order phase transition in the early Universe. Seeking for a dark matter energy density in agreement with observations, we study different non-renormaliza
Externí odkaz:
http://arxiv.org/abs/2407.14592
We consider the phase shift in the gravitational wave signal induced by fast oscillations of scalar dark matter surrounding binary systems, which could be probed by the future experiments LISA and DECIGO. This effect depends on the local matter densi
Externí odkaz:
http://arxiv.org/abs/2402.04819
The reheating phase after inflation is one of the least observationally constrained epochs in the evolution of the Universe. The forthcoming gravitational wave observatories will enable us to constrain at least some of the non-standard scenarios. For
Externí odkaz:
http://arxiv.org/abs/2311.00378
Gravitational particle production of spectator fields due to the expansion universe during the inflationary and reheating phases of the early universe is of particular interest in the context of dark matter, since it allows to constrain the propertie
Externí odkaz:
http://arxiv.org/abs/2310.07515
We analyse the dynamics of a light scalar field responsible for the $\mu$ term of the Higgs potential and coupled to matter via the Higgs-portal mechanism. We find that this dilaton model is stable under radiative corrections induced by the standard
Externí odkaz:
http://arxiv.org/abs/2303.14469
Autor:
Álvarez-Domínguez, Álvaro, Cembranos, José A. R., Garay, Luis J., Martín-Benito, Mercedes, Parra-López, Álvaro, Velázquez, Jose M. Sánchez
Publikováno v:
Phys. Rev. D 108, 065008 (2023)
We provide a reinterpretation of the quantum vacuum ambiguities that one encounters when studying particle creation phenomena due to an external and time-dependent agent. We propose a measurement-motivated understanding: Each way of measuring the num
Externí odkaz:
http://arxiv.org/abs/2303.07436
Graviton-photon oscillation is the conversion of gravitational waves to electromagnetic waves and vice versa in the presence of a background electromagnetic field. We investigate this phenomenon in a cosmological scenario considering a background cos
Externí odkaz:
http://arxiv.org/abs/2302.08186
Late vacuum choice and slow roll approximation in gravitational particle production during reheating
Publikováno v:
JCAP08(2023)060
In the transition between inflation and reheating, the curvature scalar typically undergoes oscillations which have significant impact on the density of gravitationally produced particles. The commonly used adiabatic vacuum prescription for the extra
Externí odkaz:
http://arxiv.org/abs/2301.04674
Autor:
Álvarez-Luna, Clara, de la Calle-Leal, Sergio, Cembranos, José A. R., Sanz-Cillero, Juan José
Publikováno v:
J. High Energ. Phys. 2023, 232 (2023)
The Coleman-Weinberg mechanism provides a procedure by which a scalar field, which initially has no mass parameters, acquires a mass due to the anomalous nature of scale symmetry. Loop corrections trigger a spontaneous symmetry breaking and the appea
Externí odkaz:
http://arxiv.org/abs/2212.01785
The Aharonov-Bohm effect is a genuine quantum effect typically characterized by a measurable phase shift in the wave function for a charged particle that encircles an electromagnetic field located in a region inaccessible to the mentioned particle. H
Externí odkaz:
http://arxiv.org/abs/2211.13199