18.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of LisbonPT1.3k papers
- Universidade Técnica de LisboaPT388 papers
- Centre National de la Recherche ScientifiqueFR326 papers
- Instituto de Plasmas e Fusão NuclearPT209 papers
- European Organization for Nuclear ResearchCH202 papers
- Centro de Física Teórica de Partículas201 papers
- Instituto Politécnico de LisboaPT190 papers
- Instituto de TelecomunicaçõesPT175 papers
- Universitat de ValènciaES175 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR143 papers
- Centro de Astrofísica e GravitaçãoPT133 papers
- LIP - Laboratory of Instrumentation and Experimental Particle PhysicsPT133 papers
165 papers · 1 filter
Quantum corrections for the cubic Galileon in the covariant language
Ippocratis D. Saltas, Vincenzo Vitagliano
We present for the first time an explicit exposition of quantum corrections within the cubic Galileon theory including the effect of quantum gravity, in a background- and gauge-inv…
The signal of ill-defined CPT weakening entanglement in the system
Jose Bernabeu, Francisco J. Botella, Nick E. Mavromatos +1
In the presence of quantum gravity fluctuations (space-time foam), the CPT operator may be ill-defined. Its perturbative treatment leads to a modification of the Einstein-Podolsky-…
Double Field Theory at SL(2) angles
Franz Ciceri, Giuseppe Dibitetto, J. J. Fernandez-Melgarejo +2
An extended field theory is presented that captures the full SL(2) x O(6,6+n) duality group of four-dimensional half-maximal supergravities. The theory has section constraints whos…
The CoRoT target HD49933: a possible seismic signature of heavy elements ionization in the deep convective zone
Ana Brito, Ilídio Lopes
We use a seismic diagnostic, based on the derivative of the phase shift of the reflected by the surface acoustic waves, to probe the outer layers of the star HD 49933. This diagnos…
Link invariants from finite categorical groups
Joao Faria Martins, Roger Picken
We define an invariant of tangles and framed tangles given a finite crossed module and a pair of functions, called a Reidemeister pair, satisfying natural properties. We give sever…
Table-top laser-based proton acceleration in nanostructured targets
M. Blanco, M. T. Flores-Arias, C. Ruiz +1
The interaction of ultrashort, high intensity laser pulses with thin foil targets leads to ion acceleration on the target rear surface. To make this ion source useful for applicati…
Duality and topology
P. D. Sacramento, V. R. Vieira
Mappings between models may be obtained by unitary transformations with preservation of the spectra but in general a change in the states. Non- canonical transformations in general…
Invariant measures for the non-periodic two-dimensional Euler equation
Ana Bela Cruzeiro, Alexandra Symeonides
We construct Gaussian invariant measures for the two-dimensional Euler equation on the plane. We show the existence of solution with initial conditions in the support of the measur…
Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +397
We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit h…
Type II origin of dyonic gaugings
Gianluca Inverso, Henning Samtleben, Mario Trigiante
Dyonic gaugings of four-dimensional supergravity typically exhibit a richer vacuum structure compared to their purely electric counterparts, but their higher-dimensional origin oft…
Kinematic restrictions on particle collisions near extremal black holes: A unified picture
Filip Hejda, Jiří Bičák
In 2009, Banados, Silk and West (BSW) pointed out the possibility of having an unbounded limit of centre-of-mass collision energy for test particles in the field of an extremal Ker…
Security of a single-state semi-quantum key distribution protocol
Wei Zhang, Daowen Qiu, Paulo Mateus
Semi-quantum key distribution protocols are allowed to set up a secure secret key between two users. Compared with their full quantum counterparts, one of the two users is restrict…
An Information-theoretic Approach to Machine-oriented Music Summarization
Francisco Raposo, David Martins de Matos, Ricardo Ribeiro
Music summarization allows for higher efficiency in processing, storage, and sharing of datasets. Machine-oriented approaches, being agnostic to human consumption, optimize these a…
Anatomy of the Inert Two Higgs Doublet Model in the light of the LHC and non-LHC Dark Matter Searches
Alexander Belyaev, Giacomo Cacciapaglia, Igor P. Ivanov +2
The inert Two Higgs Doublet Model (i2HDM) is a theoretically well-motivated example of a minimal consistent Dark Matter(DM) model which provides mono-jet, mono-Z, mono-Higgs and Ve…
Neutron capture cross section measurement of 238U at the n TOF CERN facility with C6D6 scintillation detectors in the energy region from 1 eV to 700 keV
TOF Collaboration, F. Mingrone, C. Massimi +102
The aim of this work is to provide a precise and accurate measurement of the 238U(n,g) reaction cross section in the energy region from 1 eV to 700 keV. This reaction is of fundame…
Constraining Black Holes with Light Boson Hair and Boson Stars using Epicyclic Frequencies and QPOs
Nicola Franchini, Paolo Pani, Andrea Maselli +4
Light bosonic fields are ubiquitous in extensions of the Standard Model. Even when minimally coupled to gravity, these fields might evade the assumptions of the black-hole no-hair…
State Sensitivity Evaluation Within UD Based Array Covariance Filters
Julia V. Tsyganova, Maria V. Kulikova
This technical note addresses the UD factorization based Kalman filtering (KF) algorithms. Using this important class of numerically stable KF schemes, we extend its functionality…
Covariantly Quantum Galileon
Ippocratis D. Saltas, Vincenzo Vitagliano
We derive the 1-loop effective action of the cubic Galileon coupled to quantum-gravitational fluctuations in a background and gauge-independent manner, employing the covariant fram…
Gluons at finite temperature
P. J. Silva, O. Oliveira, D. Dudal +2
The gluon propagator is investigated at finite temperature via lattice simulations. In particular, we discuss its interpretation as a massive-type bosonic propagator. Moreover, we…
Weakly harmonic oscillators perturbed by a conservative noise
Cedric Bernardin, Patricia Goncalves, Milton Jara
We consider a chain of weakly harmonic coupled oscillators perturbed by a conservative noise. We show that by tuning accordingly the coupling constant energy can diffuse like a Bro…
Higgs EFT for 2HDM and beyond
Hermès Bélusca-Maïto, Adam Falkowski, Duarte Fontes +2
We discuss the validity of the Standard Model Effective Field Theory (SM EFT) as the low-energy effective theory for the two-Higgs-doublet Model (2HDM). Using the up-to-date Higgs…
Electron transport parameters in CO: scanning drift tube measurements and kinetic computations
M. Vass, I. Korolov, D. Loffhagen +2
This work presents transport coefficients of electrons (bulk drift velocity, longitudinal diffusion coefficient, and effective ionization frequency) in CO2 measured under time-of-f…
Multi-resolution anisotropy studies of ultrahigh-energy cosmic rays detected at the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Aab, P. Abreu +400
We report a multi-resolution search for anisotropies in the arrival directions of cosmic rays detected at the Pierre Auger Observatory with local zenith angles up to and…
Greybody factors for a nonminimally coupled scalar field in BTZ black hole background
Grigoris Panotopoulos, Angel Rincon
In the present work we study the propagation of a probe nonminimally coupled scalar field in BTZ black hole background. We find analytical expressions for the reflection coefficien…