Masterclass "Day of Women and Girls in Science"

Thanks to integrability, a huge progress has been made in the study of N=4 supersymmetric Yang-Mills theory in the planar limit. In particular, the spectrum of the theory is described at finite coupling by a mathematical formalism known as the Quantum Spectral Curve.

After reviewing this formulation, I will present evidence that the Quantum Spectral Curve may also be the key to the computation of generic correlation functions, by studying a large class of three-point functions in a non-local sector of the theory. Finally, I will discuss some work in progress to extend this approach to local operators.

The detection and characterization of a quark-gluon plasma, a nearly perfect fluid, has been one of the major scientific triumphs of the heavy-ion programs at RHIC at BNL and the LHC at CERN. However, smaller collision systems like proton-lead and deuteron-gold represent a challenge for this perfect fluid paradigm, in part due to their relatively short lifetime. Strikingly, these systems may present a window into the initial subatomic dynamics of the nuclei, which is believed to be a highly-correlated state of gluons, known as a Color Glass Condensate. We report on recent progress in understanding multi-particle correlations in small systems using the Color Glass Condensate Effective Field Theory (CGC EFT). Results from such calculations will be compared to recent LHC and RHIC data.

These series of lectures are intended as an introduction to gravitational waves (fundamentals, origins and detection) aimed to doctoral students, and postdoctoral and senior researchers. There is no registration fee but the maximum number of participants is limited to 30. These lectures can be taken by the PhD. students of the Doctoral Program on Particle and Nuclear Physics at the USC as academic complements.

Meeting to revise the strategic plans of the IGFAE

The Skyrme model is a low energy effective field theory of strong interactions where nuclei and baryons appear as topological solitons, more concretely as collective excitations of pionic degrees of freedom. Proposed by Tony Skyrme in the sixties, his ideas received further support when it was discovered that in the limit of a large number of colours of QCD, an effective theory of mesons arises. In the last years, there has been a revival of Skyrme's ideas and new related models have been proposed to overcome two of the main drawbacks of the theory, namely, the too large binding energies and the lack of cluster structures. The aim of this talk is to successfully address both issues at the same time, something that has not been done before, by extending the standard Skyrme model with the inclusion of the rho meson, via dimensional deconstruction of pure Yang-Mills theory in one higher dimension.

Neutrinos provided the first evidence of physics beyond the Standard Model and they could also be the key to answer some of the most pressing questions today in fundamental physics, such as the origin of mass and flavour, or the cosmic asymmetry between matter and antimatter.

The Deep Underground Neutrino Experiment (DUNE) is a long-baseline neutrino oscillation experiment at Fermilab with primary goals of resolving the neutrino mass hierarchy and measuring the charge-parity violating phase, the indicator of a possible explanation for our matter-dominated universe. The scientific program of DUNE includes as well neutrino astrophysics and proton-decay searches. DUNE will consist of two neutrino detectors placed in the most intense neutrino beam ever built. A near detector will record particle interactions near the source of the beam at Fermilab close to Chicago. A second, much larger, far detector operating with more than 40 kt of liquid-argon will be installed a mile underground in South Dakota.

In this talk I will describe the experiment’s technology and give an overview of the current status and future discovery potential of the DUNE programme.

Extensions of target space T-duality to non-Abelian isometry groups and even to spaces without isometry have found recent utility within the AdS/CFT correspondence and have played a central role in the development of new classes of integrable string backgrounds called eta and lambda-models. After a pedagogical introduction to the topic I will outline some recent results concerning the open sector of lambda-models and the interpretation of these theories within the formalism of double field theory.

Deep Inelastic Scattering (DIS) at low Bjorken x is the cleanest process sensitive to the nonlinear regime of QCD. Indeed, the gluons of low momentum fraction in the target have a high occupancy, leading to gluon saturation. These low x gluons are then better described collectively as a strong semi-classical gluon field (for example in the Color Glass Condensate effective theory) than as individual quasi on-shell partons. Hence, that regime lies outside the validity range of the collinear factorization, and is better described within the dipole factorization of DIS observables which allows to resum coherent multiple scattering on the target, and also to resum the high-energy leading logarithms (LL). The dipole factorization is most easily derived within light-front perturbation theory.

So far, phenomenological studies have been performed successfully at LO+LL accuracy in the dipole factorization using HERA data for proton DIS. However, in order to reach precision, NLO corrections should be included as well as high-energy NLL resummations. This is important not only to extract as much knowledge as possible out of the precise HERA data, but also in prevision of future electron-proton and/or electron-nucleus colliders. Moreover, the charm and bottom quarks are known to give a sizable contribution to DIS at HERA, and should thus be included.

In this talk, I will present a recent calculation of the NLO corrections to DIS structure functions in the dipole factorization picture in the massless quark case, as well as ongoing efforts towards the calculation of the massive quarks contribution to DIS at NLO.

The main new issue arising in the NLO calculation with massive quark is the quark mass renormalization. Indeed, there was a longstanding confusion in the literature about quark mass renormalization in light-front perturbation theory, leading to inconsistent results. I will present how quark mass renormalization can be properly donein light-front perturbation theory, by using a UV regularization procedure respecting Lorentz invariance.