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7 papers · 2 filters
Cosmological Bounds on an Invisibly Decaying Higgs Boson
O. Bertolami, M. C. Bento, R. Rosenfeld
We derive bounds on the Higgs boson coupling to a stable light scalar which is regarded as a collisional dark matter candidate. We study the behaviour of this scalar,…
N=1 Supergravity Chaotic Inflation in the Braneworld Scenario
M. C. Bento, O. Bertolami
We study a N=1 Supergravity chaotic inflationary model, in the context of the braneworld scenario. It is shown that successful inflation and reheating consistent with phenomenologi…
The impact of cooling and pre-heating on the Sunyaev-Zel'dovich effect
Antonio C da Silva, Scott T Kay, Andrew R Liddle +3
We use hydrodynamical simulations to assess the impact of radiative cooling and `pre-heating' on predictions for the Sunyaev--Zel'dovich (SZ) effect. Cooling significantly reduces…
A Two-Field Quintessence Model
M. C. Bento, O. Bertolami, N. C. Santos
We study the dynamics of a quintessence model based on two interacting scalar fields. The model can account for the (recent) accelerated expansion of the Universe suggested by astr…
Cosmological implications of the MAXIMA-I high resolution Cosmic Microwave Background anisotropy measurement
R. Stompor, M. Abroe, P. Ade +17
We discuss the cosmological implications of the new constraints on the power spectrum of the Cosmic Microwave Background Anisotropy derived from a new high resolution analysis of t…
A High Spatial Resolution Analysis of the MAXIMA-1 Cosmic Microwave Background Anisotropy Data
A. T. Lee, P. Ade, A. Balbi +17
We extend the analysis of the MAXIMA-1 cosmic microwave background (CMB) data to smaller angular scales. MAXIMA, a bolometric balloon experiment, mapped a 124 deg region of the…