2017-2018
Organizers in 2017-2018: Theoretical Physics: Avelino Vicente, Alejandro Segarra and Ana Peñuelas; Atomic, Molecular and Nuclear Physics: Martín Perelló Roselló, Sergi Rodríguez and Oscar Estrada; Applied Physics and Optics: Andrea González and Ángel Tolosa.
- Seminars session: 'Double beta decay and the NEXT experiment'.
6 Seminars. 19 April 2018. Know more - The NEXT path to neutrino inverse hierarchy.
Javier Muñoz Vidal. 12 March 2018. - The metric (may not) be the foundation of all, and particle physics could tell.
Adrià Delhom i Latorre, IFIC (UV-CSIC). 17 Jan. 2018. - Regularization in Quantum Field theory and the Loop-Tree Duality theorem.
Felix Driencourt-Mangin, IFIC (UV-CSIC). 10 Jan. 2018. - Search for BSM heavy neutral Higgs and gauge bosons in the ditau final state with the ATLAS detector.
Adam Bailey, IFIC (UV-CSIC). 11 Dec. 2017. - About neutrino oscillations, neutrino masses and their ordering.
Christoph A. Ternes, IFIC (UV-CSIC). 27 Nov. 2017. - Hadron therapy dose monitoring with a Compton Telescope based on LaBr3 and SiPMs.
Enrique Muñoz A., IFIC (UV-CSIC). 23 Nov. 2017. - Magnetospheric electrodynamics: Studying the Blandford/Znajek process in GR time evolution simulations of force-free electrodynamics around Kerr black holes
Jens Mahlmann, UV. 13 Nov. 2017. - Quantum dots: Tiny particles with a bright future
Juan Navarro A, ICMUV (UV). 11 Oct. 2017. - Aplicación de la computación de altas prestaciones y computación distribuida en cálculos de Física Médica y radioterapia basados en Monte-Carlo.
Vicente Giménez. 11 Oct 2017.
2016-2017
Organizers in 2016-2017: Theoretical Physics: Avelino Vicente, Alejandro Segarra and Javier Fuentes; Atomic, Molecular and Nuclear Physics: Martín Perelló Roselló, Sergi Rodríguez and Oscar Estrada; Astronomy and Astrophysics: Rafael Logroño; Applied Physics and Optics: Andrea González and Ángel Tolosa.
- Production and radiative decay of heavy neutrinos at the Booster Neutrino Beam.
- Integral imaging display based on 3D cameras
- Three-dimensional imaging through Fourier-domain integral microscopy
- Digital watermarking of light field
- Very deep inside the SN 1987A core ejecta: Molecular structures seen in 3D.
- Whispering gallery modes: high resolution measurement technique.
- Analysis of refractive index profile in single mode fibers using the experimental dispersion curves.
- Predictions for ηc → ηπ+π- producing f0 (500),f0(980) and a0(980).
- Digital Holographic Microscopy: converting a standard microscope into a holographic one. Some applications.
- Estudio sistemático del compuesto BiVO4 bajo condiciones extremas mediante experiencias Raman, experiencias de difracción de Rayos-x, y medidas de absorción óptica.
- Surface acoustic waves resonators.
- Probing the Wtb vertex structure with the ATLAS detector.
- A light sneutrino rescues the light stop.
- Testing QCD with inclusive tau decays.
- Exotic states and hadronic molecules.
- b--> sll anomalies from dynamical Yukawas.
2015-2016
Organizers: Adrian del Rio; Miguel Escudero; Roberto A. Lineros; Carlos Sanchez Mayordomo; Avelino Vicente.
- Measuring with a TAS: implications and applications.
Victor Guadilla, June 2016. read more - Particle identification with the KM3NeT/ORCA neutrino detector.
Moritz Lotze, June 2016. read more - Search for dihiggs production in the ATLAS dihiggs to gamma gamma bbbar channel.
Leonor Cerdà A., June 2016 read more - Aspects of strongly interacting matter within a Nambu-Jona-Lasinio model.
Valeria Pagura, May 2016. read more - From Fermi theory to the Standard model and beyond: the unitarity viewpoint.
Dipankar Das, April 2016. read more - Quasi-Dirac neutrinos at LHC.
Gaenata Anamiati, April 2016. read more - Measuring the photon polarization at LHCb.
Carlos Sánchez Mayordomo, April 2016. read more - Isospin mixing and in-beam study of non-yrast states of 56Co.
Ana Montaner, March 2016. read more - Single-field slow-roll inflation: a review and some particular aspects.
Héctor Ramírez, Feb. 2016. read more - The role of neutrino oscillations in some cosmological scenarios.
Pablo Fernandez de Salas, Jan. 2016. read more - The Cosmic microwave background: a tool for constraining fundamental physics.
Miguel Escudero, Dec. 2015. read more
2014-2015
Organizers: Adrian del Rio, Roberto A. Lineros, Joaquin Santos Blasco
- On the minimality of the order p6 chiral Lagrangian.
Mehran Zahiri Abyaneh, July 2015. read more - Dyakonov surface waves engineered with metamaterials.
J. Aitor Sorní Laserna, July 2015. read more - The indirect search for dark matter using cosmic rays.
Christoph Tönnis, June 2015. read more - Resonances in the electroweak effective Lagrangian.
Joaquín Santos Blasco, June 2015. read more - Application of high-gradient RF technologies.
Jorge Giner, May 2015. read more - Quasistationary solutions of self-gravitating scalar fields around black holes.
Nicolás Sanchis-Gual, May 2015. read more - ATLAS: from collisions to a single top analysis.
Sebastián Pedraza L., April 2015. read more - Numerical implementation of the loop-tree duality method.
Sebastián Buchta, April 2015. read more - Alignment of the ATLAS inner detector.
Javier Jimenez Peña, March 2015. read more - An introduction to chiral perturbation theory and its applications.
Astrid Blin, Feb. 2015. read more - Color physics and hadron colliders.
Roger J. Hernández Pinto, Jan. 2015. read more - The role of renormalization in curved spacetime.
Adrián del Río V., Nov. 2014. read more
- Measuring with a TAS: implications and applications.
Victor Guadilla, IFIC (UV-CSIC). Group:IFIC-GAMMA. June 2016.
Total Absorption Gamma-ray Spectroscopy (TAGS) has been shown to be an effective tool in beta decay measurements to obtain the intensity distribution that populates the levels of the daughter nucleus. This technique requires large scintillator crystals covering a 4pi solid angle in order to maximize the efficiency. In this seminar, the new DTAS spectrometer, recently designed, constructed and commissioned by the Gamma Spectroscopy Group of Valencia, will be presented. The first experiments with this detector were performed at IGISOL (Jyväskylä, Finland) in 2014 and the first results of the cases measured in this campaign will be reported, showing the variety of application of this technique: reactor technology, antineutrino Physics, beta-delayed neutron emission, double beta decay etc. - Particle identification studies with the KM3NeT/ORCA neutrino detector.
Moritz Lotze, IFIC (UV-CSIC). Group:IFIC-ANTARES. June 2016.
The indirect search for Dark Matter with the KM3NeT/ORCA detector relies on both rejecting the dominant background of atmospheric muons as well as the flavor indentification of the remaining neutrino events. A multivariate approach to tackle these event classification problems is presented here among preliminary results. - Search for dihiggs production in the ATLAS dihiggs to gamma gamma bbbar channel.
Leonor Cerdà A., IFIC (UV-CSIC). Group:IFIC-ATLAS. June 2016.
Searches for both resonant and non-resonant production of pairs of Higgs bosons (hh) are performed in the bbyy final state using 3.2 fb^{-1} of proton–proton collision data at 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. An upper limit of 3.9 pb on the cross-section for non-resonant production is extracted at the 95% confidence level, while the expected limit is 5.4 pb. In the search for a narrow X->hh resonance, the observed limit ranges between 7.0 pb and 4.0 pb for masses of the resonance between 275 and 400 GeV. The corresponding expected limit varies between 7.5 pb and 4.4 pb for the same mass range. - Aspects of strongly interacting matter within a Nambu-Jona-Lasinio model.
Valeria Pagura, IFIC (UV-CSIC). Group:IFIC-THEO. May 2016.
In this seminar I will give a description of the nonlocal Nambu-Jona-Lasinio model for strongly interacting matter, and show how it can be used to analyze the characteristics of the deconfinement and chiral restoration transitions at finite temperature and chemical potential, as well as some mesonic properties. - From Fermi theory to the Standard model and beyond: the unitarity viewpoint.
Dipankar Das, IFIC (UV-CSIC). Group:IFIC-THEO. April 2016.
In this talk I intend to revisit the main features of the Standard Model (SM) in the light of unitarity. I will take an alternative route to "build" the SM. I shall review how the SM emerges as minimal theory consistent with unitarity, without talking about non-abelian gauge symmetries at all. At the end, I shall give an example of how the unitarity argument can still be relevant in building models beyond the SM. - Quasi-Dirac neutrinos at LHC.
Gaenata Anamiati, IFIC (UV-CSIC). Group:IFIC-AHEP. April 2016.
Lepton number violation is searched for at the LHC using same-sign leptons plus two jets from production and subsequent decay of heavy neutrinos. For Majorana neutrinos the expected value for the ratio R of same-sign to opposite sign lepton events is 1, while for Dirac neutrinos is 0. We point out that values that vary continuously between the two extremes are also a possibility. We focus on the case of an inverse see-saw in the Left-Right Symmetric Model and we also discuss how a measurements of R can be correlated with other observables such as Br(\mu\rightarrow e \gamma). - Measuring the photon polarization at LHCb.
Carlos Sánchez Mayordomo, IFIC (UV-CSIC). Group:IFIC-LHCb. April 2016.
New Physics in the heavy quark sector could arise in decay rates, CP parameters, or the chirality of the final state particles. The LHCb experiment can measure the photon polarization of several rare decays in which a penguin diagram is involved, probing the V-A coupling of the W boson to left-handed quarks in electroweak interactions. Direct methods, analyzing the angular distribution of the final particles, and indirect methods, for example exploiting the properties of the mixing of neutral B mesons in deacys like Bs -> Phi Gamma, will be discussed. - Isospin mixing and in-beam study of non-yrast states of 56Co.
Ana Montaner, IFIC (UV-CSIC). Group:IFIC-GAMMA. March 2016.
If isospin symmetry works in nuclear physics, mirror nuclei, i.e., nuclei where the number of protons and neutrons are interchanged, should be very similar. In this talk I will explain an experimental study where we compare the nuclear properties of Co-56 (Z=27, N=29) and Cu-56 (Z=29,N=27). The experiment was carried out at the Tandem accelerator of the Technische Universität München (TUM, Garching, Germany) using gamma-spectroscopy techniques. - Single-field slow-roll inflation: a review and some particular aspects.
Héctor Ramírez, IFIC (UV-CSIC). Group:IFIC-SOM. Feb. 2016.
Inflation provides the most theoretically attractive and observationally successful cosmological scenario able to generate the initial conditions of our Universe, while solving the standard cosmological problems. In this talk I will review the inflationary mechanism in its single-field slow-roll realization. In the first part I will describe the theoretical and mathematical aspects that lead to the observables we can measure in the present days in oder to test inflation, and also I will present the current status of the most favoured single-field inflationary models. In the second part I will talk particularly about the non-minimally coupled chaotic model as well as two model independent approaches of inflation. - The role of neutrino oscillations in some cosmological scenarios.
Pablo Fernandez de Salas, IFIC (UV-CSIC). Group:IFIC-AHEP. Jan. 2016.
Neutrinos have been related to some of the most puzzling phenomena in particle physics, being flavor oscillations one of their most interesting aspects. Here I will focus on the importance of neutrino oscillations in several scenarios. Firstly, I will discuss how they affect the determination of the effective number of neutrinos, a parameter of the standard cosmological model. Finally, I will also mention the role of these elusive particles in determining the lowest possible reheating temperature of the universe. - The Cosmic microwave background: a tool for constraining fundamental physics.
Miguel Escudero, IFIC (UV-CSIC). Group:IFIC-SOM. Dec. 2015.
The precise measurements of the Cosmic Microwave Background (CMB) by the Planck satellite have pushed the understanding of the universe to unprecedented limits. The aim of the talk is to introduce the concepts, assumptions, limitations and prospectives behind this success. Some notions of General Relativity, the Cosmological Principle, an outline of the contents of the universe, the different epochs the universe has undergone, the basics of cosmological perturbation theory and how all these matters affect the measurements of the CMB will be presented. Finally, I will show how the CMB can give light on fundamental questions as what is the dark matter nature or what is the precise mechanism that generated the primordial perturbations that seeded the structures we observe today in our universe. - On the minimality of the order p6 chiral Lagrangian.
Mehran Zahiri Abyaneh, IFIC (UV-CSIC). Group:THEO, 14 July 2015.
A method to find relations between the operators in the the mesonic Lagrangian of Chiral Perturbation Theory at order p6 is presented. The procedure can be used to establish if the basis of operators in the Lagrangian is minimal. As an example, we apply the method to the two-flavour case in the absence of scalar and pseudoscalar sources (s = p = 0), and conclude that the minimal Lagrangian contains 27 independent operators. - Dyakonov surface waves engineered with metamaterials.
J. Aitor Sorní Laserna, IFIC (UV-CSIC). Group:EXP-Fotonica, 1 July 2015.
We analyze surface-wave propagation that takes place at the boundary between a semi-infinite dielectric and a multilayered metamaterial. This class of nanostructured media, which can have elliptic and hyperbolic dispersion, are promising metamaterials with a plethora of practical applications from biosensing to fluorescence engineering. - The indirect search for dark matter using cosmic rays.
Christoph Tönnis, IFIC (UV-CSIC). Group:EXP-Antares, 16 June 2015.
Within the various attempts to determine the nature of dark matter there are two types of types of searches: Direct searches, that typically search for interactions between dark matter particles with baryonic matter within some type of instrumented volume of a detector or for dark matter candidate particles being produced within accelerators, and indirect searches, that look for an indirect signal in the form of cosmic rays from dark matter annihilations or decays within celestial objects. In this seminar i will focus on these indirect searches with cosmic rays giving an overview of the different experiments and show details of these searches with the example of neutrinos from dark matter annihilations. - Resonances in the electroweak effective Lagrangian.
Joaquín Santos Blasco, IFIC (UV-CSIC). Group:THEO, 4 June 2015.
In order to study strongly coupled models of electroweak symmetry breaking with a light Higgs boson, a resonance effective Lagrangian with bosonic massive resonances together with the Standard Model degrees of freedom is required. The constraints for this Lagrangian come from the phenomenology and from the assumed high-energy behavior of the underlying theory. This resonance effective theory can be used to estimate the low-energy constants (LECs) of the Electroweak Effective Theory in terms of resonance parameters and to make predictions of low-energy observables. - Application of high-gradient RF technologies.
Jorge Giner, Group:EXP, 22 May 2015.
Significant progress has been made over the past decade by studies of normal-conducting linear colliders as NLC/JLC and CLIC, to rise achievable accelerating gradient from the range of 20-30 MV/m up to 100-120 MV/m. In particular in the CLIC project, high gradients of 100 MV/m are needed in the RF accelerating structures, however undesired vacuum arcs affect negatively to beam transmission and collisions. These gradients, at very low breakdown rates, have been successfully achieved in numerous CLIC prototype accelerating structures. In this seminar, three generations of X-band high-power test stands at CERN (Xbox) are presented. Data is widely analysed in order to understand breakdown phenomena and the optimum way to condition cavities towards lower breakdown rates. High-Gradient technologies have also strong applications in medical hadron therapy accelerators, to significantly reduce the complexity and cost of the gantries and moveable heads, which are required to irradiate the patient from different angles, by directly mounting the linacs on them. This is the goal of the TULIP (Turning Linac for Protontherapy) project consisting on a single-room proton therapy facility. A new HG-RF laboratory is on construction in the Sciences Park of the University of Valencia, in the framework of collaboration between the IFIC and CLIC in order to test this kind of structures. During the seminar, the high-power tests of these structures held at CERN will be presented. - Quasistationary solutions of self-gravitating scalar fields around black holes.
Nicolás Sanchis-Gual, IFIC (UV-CSIC). Group:ASTRO, 6 May 2015.
Recent perturbative studies have shown the existence of long-lived, quasistationary configurations of scalar fields around black holes. In particular, such configurations have been found to survive for cosmological time scales, which is a requirement for viable dark matter halo models in galaxies based on such types of structures. We have performed a series of numerical relativity simulations of dynamical nonrotating black holes surrounded by self-gravitating scalar fields by solving numerically the coupled system of equations formed by the Einstein and the Klein-Gordon equations under the assumption of spherical symmetry using spherical coordinates. Our results confirm the existence of oscillating, long-lived, self-gravitating scalar field configurations around nonrotating black holes in highly dynamical spacetimes with a rich scalar field environment. - ATLAS: from collisions to a single top analysis.
Sebastián Pedraza López, IFIC (UV-CSIC). Group:EXP-ATLAS, 24 April 2015.
In this talk I will show a brief summary of the work behind the scenes in ATLAS, from the interaction point to the final ntuples to be used by the analyzers. After that, I will talk about my analysis, where I’m trying to measure the W polarization fractions using single top events. - Numerical implementation of the loop-tree duality method.
Sebastián Buchta, IFIC (UV-CSIC). Group:THEO, 14 April 2015.
The Loop-Tree Duality (LTD) is a novel perturbative method in QFT that establishes a relation between loop–level and tree–level amplitudes, which gives rise to the idea of treating them simultaneously in a common Monte Carlo. Initially introduced for one–loop scalar integrals, the applicability of the LTD has been expanded to higher order loops and Feynman graphs beyond simple poles. For the first time, a numerical implementation relying on the LTD was done in the form of a computer program that calculates one–loop scattering amplitudes. I will present details on the employed contour deformation as well as results for scalar and tensor integrals. - Alignment of the ATLAS inner detector.
Javier Jimenez Peña, IFIC (UV-CSIC). Group:EXP-ATLAS, 26 March 2015.
In order to reconstruct the trajectories of charged particles, ATLAS relies on an Inner Detector (ID) tracking system. Positions of signals (hits) recorded in individual detector elements are used to reconstruct the trajectories of charged particles inside the tracker and ultimately to estimate their kinematic parameters. The accuracy of this process is intrinsically limited by the finite resolution of the sensitive devices. Any detector misalignment adds to the uncertainty on the hit position and consequently on the reconstructed track parameters. Therefore, it is important to know the positions of all the ID detector elements within the detector volume as accurately as possible. The alignment procedure determines these positions and is necessary before any reliable physics measurements can be performed. - An introduction to chiral perturbation theory and its applications.
Astrid Blin, Group:THEO, 5 Feb. 2015.
When considering energies below 1GeV (corresponding to the scale of spontaneous chiral symmetry breaking), perturbative QCD breaks down, because the strong coupling constant becomes too large. Therefore other theoretical approaches need to be found to describe processes in this energy range, e.g. Chiral Perturbation Theory (ChPT). I will introduce you to this theory's underlying symmetries and applications and explain how it can be used to make predictions about experimental results yet to come. - Color physics and hadron colliders.
Roger J. Hernández Pinto, Group:THEO, 14 Jan. 2015.
One of the main discoveries so far of the LHC is the Higgs-like particle of the Standard Model. The announce in 2012 at CERN was achieved due to the strong collaboration between theorists and experimentalists all around the globe. From the theoretical point of view the processes which are taking place in the LHC are understood on the framework of the Color Physics or Quantum Chromodynamics. In this talk, we review the general ideas which are nowadays used for extracting information from the LHC data in order to test the Standard Model and/or the Beyond the Standard Model physics. - The role of renormalization in curved spacetime.
Adrián del Río Vega, Group:THEO, 20 Nov. 2014.
In this seminar we present the stress-energy tensor as the fundamental object in the study of a quantum field theory on a curved background. We discuss its convenience with respect the somehow misleading concept of particles, and also the consequences from the implicit gravitational interaction, such as additional divergences even for free fields. These ones suggest the development of new different renormalization techniques in curved space-time, rather than the usual normal-ordering employed in Minkowski. In this talk we will focus mainly on the so called adiabatic scheme, and compare it to the DeWitt-Schwinger formalism. Some new features from the renormalization theory will be derived (conformal anomalies), and some applications in cosmology will be presented to show the power of this method.
