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The Impact of Galactic Astrophysical Uncertainties on the Reconstruction of Dark Matter Properties.

The distribution of Dark Matter in galaxies is one remarkable output of structure formation in a cosmological context, and an important input for the searches of the nature of Dark Matter. In this talk, I will present the results of recent, fully data-driven analysis of the determination of the Dark Matter content in the Milky Way. I will also show how the uncertainties obtained with this observation-driven approach affect the interpretation of direct and indirect searches, and eventually the searches for the very nature of the Dark Matter.

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The experimental particle physics program in Centro CientÌfico Tecnologico de Valparaiso in UTFSM.

During the last decade Universidad TÈcnica Federico Santa MarÌa (UTFSM) successfully took the leading role in developing experimental particle physics in Chile. During that period a solid team of experimental physicists has been formed. Our group is actively participating in several international collaborative projects including the ATLAS in CERN, MINERvA in Fermilab and CLAS/CLAS12 as well as GlueX in Jefferson Lab. Apart from active scientific research our group has successfully developed several hardware and software related projects in close collaboration with colleagues from the areas of mechanical, electronic and informatics engineering from our university as well as from other Chilean and foreign universities. At the same time, we succeeded in creating a multifunctional laboratory and computational facilities mainly in the base of Centro Cientifico Tecnologico de ValparaÌso (CCTVal), a research center in UTFSM. In the presentation I will focus mainly on CCTVal’s participation to JLab’s scientific program.

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Search of electric dipole moments of charged particles in storage rings

The Electric Dipole Moment (EDM) of elementary particles, including hadrons, is considered as one of the most powerful tools to study CP-violation beyond the Standard Model. Such CP-violating mechanisms are searched for to explain the dominance of matter over anti-matter in our universe. Up to now EDM experiments concentrated on neutral systems, namely neutrons, atoms and molecules. Storage rings offer the possibility to measure EDMs of charged particles by observing the influence of the EDM on the spin motion. A step-wise approach to the measurement of the proton EDM, starting with a proof-of-principle experiment at the existing storage ring Cooler Synchrotron COSY at Forschungszentrum Jülich, followed by an electrostatic prototype ring allowing for a simultaneous operation of counter circulating beams in order to cancel systematic effects, to the design of a dedicated 500 m circumference storage ring will be presented.  

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Effective field theories for lepton dipole moments: updates and applications

The status of the research on effective field theories for lepton dipole moments will be reviewed. Standard Model Effective Field Theories (SMEFTs) at high and low energies will be reviewed in light of current and future bounds from experiments on lepton flavour violation. In addition, some modern techniques for multi-loop computations in SMEFTs will be reviewed and applications to ultra-violet complete theories will be shown

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Searching for long-lived particles from light dark sectors

Dark matter-motivated light dark sectors often feature long-lived hidden sector states. Their presence offers bright detection prospects at fixed target experiments and colliders and may lead to strong astrophysical bounds. We will illustrate this point by exploring explicitly a typical simple fermion light dark matter setup, then expanding to limits on an effective theory of light dark sectors. In particular, we will investigate in detail the semi-visible three-body decays of dark sector states and show that it is a key element of the accelerator phenomenology of such models.

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Update on b to s anomalies after Moriond 2019

Flavour Changing Neutral Currents (FCNC) are an excellent probe for the search of New Physics. Therefore, LHCb has put a particular care in the study of B decays mediated by FCNC starting from Run I and with more data being presently acquired during Run II. Tensions between present data and Standard Model predictions have been found in some of these channels, hinting at a possible violation of Lepton Flavour Universality. I will review the status of these tensions after the latest result presented at Moriond 2019, assessing with particular care the theoretical cleanness of the observables displaying such tensions. Then, I’ll discuss the possible explanations for such a pattern of anomalies both within and beyond the Standard Model, employing a model independent EFT framework. Finally, I’ll review a possible loop model capable to address such anomalies.

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Model independent analysis of MeV scale dark matter

Recent results from several direct detection experiments have imposed severe constraints on the multi-GeV mass window for various dark mat- ter(DM) models. However, many of these experiments are not sensitive to MeV scale DM as the corresponding recoil energies are much below the detector thresholds. In this regard, we reexamined the light scalar DM in a model-independent approach in our recent work. For such a DM, it should not be assumed that it annihilates into a pair of free quarks. Instead, it becomes necessary to determine the effective couplings of DM to hadrons and calculate the annihilation rate with hadrons in final states. In this talk, I will discuss the methodology for determining this effective coupling along with various constraints coming from cosmological and astrophysical observations.

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Vector-like quarks at the LHC: non standard channels

Searches for new vector-like quarks at the LHC by both ATLAS and CMS have set mass bounds above the TeV. These searches, however, usually rely on a set of assumptions about the properties of such quarks. After discussing these assumptions, I will show how it is possible to explore different scenarios by relaxing some of them. I will focus in particular on vector-like quarks with large width, on the role of NLO corrections for single production, and on the possibility that vector-like quarks decay into new scalar exotic states.

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Physics of self-modulations and acceleration results in the AWAKE experiment

Plasma-based accelerators use wakefields driven in plasma to accelerate particles (e-/e+) with large gradient (>1GeV/m). In AWAKE, a long proton bunch (6-12 cm) self-modulates in a 10 m-long plasma with electron density in the 10^14-10^15/cm^3 range into a train of micro-bunches shorter than, and separated by the wakefields period. The train resonantly drives wakefields to large amplitude. Low energy electrons can be externally injected and accelerated to GeV energies. We will introduce AWAKE and its experimental setup. We will show experimental results in beam plasma interaction physics, including self-modulation of the proton bunch, seeding and the resulting stability of the process, etc. We will show acceleration results with energy gain from about 19 MeV to 2 GeV. We will briefly describe future experiments and possible applications of the acceleration scheme.

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