BackExaminar Artículos por departamento (cas.) "Física teórica e historia de la ciencia"
Now showing items 21-40 of 120
-
Cosmological constrains on fast transition Unified Dark Matter models
Lazcoz Sáez, Ruth
; Leanizbarrutia Alonso, Iker; Salzano, Vincenzo (IOP Publishing, 2015)
In this work we show the results obtained applying a Unified Dark Matter (UDM) model with a fast transition to a set of cosmological data. Two different functions to model the transition are tested, and the feasibility of ... -
Cosmological Perturbations in Phantom Dark Energy Models
Albarran, Imanol; Bouhmadi López, Mariam; Morais, Joao (MDPI, 2017-03-06)
The CDM paradigm, characterised by a constant equation of state w = -1 for dark energy, is the model that better fits observations. However, the same observations strongly support the possibility of a dark energy content ... -
Dalitz analysis of D0 → K− π+ η decays at Belle
(American Physical Society, 2020-07-06)[EN] We present the results of the first Dalitz plot analysis of the decay D0 → K−πþη. The analysis is performed on a data set corresponding to an integrated luminosity of 953 fb−1 collected by the Belle detector at the ... -
Doomsdays in a modified theory of gravity: a classical and a quantum approach
Albarran, Imanol; Bouhmadi López, Mariam; Chen, Che-Yu; Chen, Pisin (Elsevier, 2017-09-10)
By far cosmology is one of the most exciting subject to study, even more so with the current bulk of observations we have at hand. These observations might indicate different kinds of doomsdays, if dark energy follows ... -
Double layers in gravity theories
Martín Senovilla, José María (IOP Publishing, 2015)
Gravitational double layers, unlike their classical electromagnetic counterparts, are thought to be forbidden in gravity theories. It has been recently shown, however, that they are feasible in, for instance, gravity ... -
Effect of Interactions in the Interference Pattern of Bose-Einstein Condensates
(American Physical Society, 2020-10-12)Understanding the effect of interactions in the phase evolution of expanding atomic Bose-Einstein condensates is fundamental to describing the basic phenomenon of matter wave interference. Many theoretical and experimental ... -
Electroweak strings with dark scalar condensates and their stability
(American Physical Society, 2020-07-06)[EN] The stability of “visible” electroweak-type cosmic strings is investigated in an extension of the Standard Model by a minimal dark sector, consisting of a Uð1Þ gauge field, broken spontaneously by a scalar. The visible ... -
Energy and momentum transfer in one-dimensional trapped gases by stimulated light scattering
(IOP Publishing, 2015-06-10)In ultracold atoms settings, inelastic light scattering is a preeminent technique to reveal static and dynamic properties at nonzero momentum. In this work, we investigate an array of one-dimensional trapped Bose gases, ... -
Entanglement and extreme spin squeezing of unpolarized states
(IOP Publishing, 2017-01-20)We present criteria to detect the depth of entanglement in macroscopic ensembles of spin-j particles using the variance and second moments of the collective spin components. The class of states detected goes beyond traditional ... -
Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
(IOP Publishing, 2018-05-16)We study quantum entanglement loss due to environmental interaction in a condensed matter system with a complex geometry relevant to recent proposals for computing with single electrons at the nanoscale. We consider a ... -
Entanglement negativity in the harmonic chain out of equilibrium
(IOP Publishing, 2014-12-08)We study the entanglement in a chain of harmonic oscillators driven out of equilibrium by preparing the two sides of the system at different temperatures, and subsequently joining them together. The steady state is constructed ... -
Evidence for a vector charmoniumlike state in e + e − → D + s D ∗ s 2 ( 2573 ) − + c . c .
(American Physical Society, 2020-05-12)We report the measurement of e(+) e(-) -> D-s(+) Ds(2)*(2573)(-) c.c. via initial-state radiation using a data sample of an integrated luminosity of 921.9 fb(-1) collected with the Belle detector at the Upsilon(4S) and ... -
Evidence for B+ -> h(c)K(+) and observation of eta(c()2S) -> p(p)over-bar pi(+)pi(-)
(American Physical Society, 2019-07-10)A search for the decays B+ -> h(c)K(+) and B-0 -> h(c)K(S)(0) is performed. Evidence for the decay B+ -> h(c)K(+) is found; its significance is 4.8 sigma. No evidence is found for B-0 -> h(c)K(S)(0). The branching fraction ... -
f (R) Gravity Modifications: From The Action To The Data
Lazcoz Sáez, Ruth; Ortiz Baños, María; Salzano, Vincenzo (Springer, 2018-03-13)
It is a very well established matter nowadays that many modified gravity models can offer a sound alternative to General Relativity for the description of the accelerated expansion of the universe. But it is also equally ... -
Fault-tolerant almost exact state transmission
(Nature Publishing Group, 2013-11)We show that a category of one-dimensional XY-type models may enable high-fidelity quantum state transmissions, regardless of details of coupling configurations. This observation leads to a fault-tolerant design of a state ... -
First measurement of the CKM angle ϕ3 with B±→ D(K0S π+π−π0) K± decays
(Springer, 2019-10-16)We present the first model-independent measurement of the CKM unitarity triangle angle phi(3) using B-+/--> D(K-S(0)pi(+)pi(-)pi(0)) K-+/- decays, where D indicates either a D-0 or (D) over bar (0) meson. Measurements of ... -
First Measurements of Absolute Branching Fractions of the Xi(0)(c) Baryon at Belle
(American Physical Society, 2019-02-25)We present the first measurements of absolute branching fractions of Xi(0)(c) decays into Xi(-)pi(+), Lambda K-pi(+), and pK(-)K(-)pi(+) final states. The measurements are made using a dataset comprising (772 +/- 11) x ... -
First search for the ηc2(1D) in B decays at Belle
(Springer, 2020-05-08)The first dedicated search for the ηc2(1D) is carried out using the decays B+→ ηc2(1D)K+, B0 → ηc2(1D)K0S, B0→ ηc2(1D)π−K+, and B+→ ηc2(1D)π+K0S with ηc2(1D) → hcγ. No significant signal is found. For the ηc2(1D) mass range ... -
Fitting BICEP2 with defects, primordial gravitational waves and dust
Lizarraga Olano, Joanes; Urrestilla Urizabal, Jon ; ; ; ; (IOP Publishing, 2015)
In this work we discuss the possibility of cosmic defects being responsible for the B-mode signal measured by the BICEP2 collaboration. We also allow for the presence of other cosmological sources of B-modes such as ... -
Forecast And Analysis Of The Cosmological Redshift Drift
Lazcoz Sáez, Ruth; Leanizbarrutia Alonso, Iker; Salzano, Vincenzo (Springer, 2018-01-08)
The cosmological redshift drift could lead to the next step in high-precision cosmic geometric observations, becoming a direct and irrefutable test for cosmic acceleration. In order to test the viability and possible ...