‘Hydrodynamic electron transport’
In this talk I will review the progresses that has been done in the last year in the description of strongly coupled condensed matter electron systems by means of hydrodynamic and holographic effective field theories, focusing particularly on the experimental results. Particular attention will be put on recent results on high temperature superconductors. In the final part of the talk I will try to emphasize open questions and possible future directions.
Per partecipare: gruppo Teams Università di Genova numero 1npbr0h (se si possiede un account Teams Unige, si può accedere con il codice.
Se invece si possiede solo un account Teams INFN, scrivere a simone.marzani@ge.infn.it per essere aggiunti come ospiti).
Non-Fierz-Pauli Massive Gravity
Modifying gravity at large distances by means of a massive graviton may explain the observed acceleration of the Universe without Dark Energy. The standard paradigm for Massive Gravity is the Fierz-Pauli theory, which, nonetheless, displays well known flaws in its massless limit. The most serious one is represented by the vDVZ discontinuity, which consists in a disagreement between the massless limit of the Fierz-Pauli theory and General Relativity. A field-theoretical treatment of linearized Massive Gravity leads to an alternative theory describing the five degrees of freedom of the graviton, with a good massless limit, without vDVZ discontinuity, and depending on one mass parameter only, in agreement with the Fierz-Pauli theory.
Per partecipare: gruppo Teams Università di Genova numero 1npbr0h (se si possiede un account Teams Unige, si può accedere con il codice.
Se invece si possiede solo un account Teams INFN, scrivere a simone.marzani@ge.infn.it per essere aggiunti come ospiti).
Constraining the Minimal Dirac Gaugino Model
Most SUSY searches at the LHC are optimised for the MSSM, where gauginos are Majorana particles. By introducing Dirac gauginos, we obtain an enriched phenomenology, from which considerable differences in LHC signatures are expected. Concretely, in the Minimal Dirac Gaugino Model (MDGSSM) we have an electroweakino sector extended by two extra neutralino and one extra chargino eigenstates. Furthermore, a small mass splitting between the bino- like and between wino- like states can be naturally induced leading to the presence of Long Live Particles (LLPs). Here we discuss current limits on the gluinos and squarks and on the electroweakino sector of the MDGSSM, derived from reinterpretion LHC results and by considering constraints from dark matter searches. Finally, we discuss the presence of scenarios with LLPs whose predominant signature has not been covered in LHC searches.
Seminario di Fenomenologia – Dr. Simone Marzani (Dip.to di Fisica Universita’ di Genova e INFN Sezione di Genova)
In this talk some recent developments in the context of jet physics and their structure are reviewed. In particular, new substructure variables that aim to probe colour flow in particle events are introduced. These variables find a natural application in the context of tagging a boosted Higgs boson. In the second part of the talk, the use of machine-learning algorithms in the context of jet physics is reviewed and the first attempts to achieve a systematic first-principle understanding of their performance is discussed.
Per partecipare: gruppo Teams Università di Genova numero 1npbr0h (se si possiede un account Teams Unige, si può accedere con il codice.
Se invece si possiede solo un account Teams INFN, scrivere a simone.marzani@ge.infn.it per essere aggiunti come ospiti).
Seminario di Fisica Teorica – Roberto Tateo (Università di Torino and INFN, Sezione di Torino)
Two-dimensional field theories deformed by Zamolodchikov’s TTbar
operator have recently attracted the attention of theoretical physicists
due to the many important links with integrability and string theory.
In this talk, I will describe various classical and quantum aspects of
this irrelevant perturbation, in particular the deformation of soliton
models.
Per partecipare: gruppo Teams Università di Genova numero 1npbr0h (se si possiede un account Teams Unige, si può accedere con il codice.
Se invece si possiede solo un account Teams INFN, scrivere a simone.marzani@ge.infn.it per essere aggiunti come ospiti).
Seminario di Fenomenologia – Yiannis Makris (INFN, Sezione di Pavia)
With the future Electron-Ion Collider data estimated to arrive in a decade, the need for theoretical and phenomenological tools to understand deep inelastic scattering (DIS) events has never been more urgent. In this seminar I will discuss early steps towards this direction. Specifically, I will focus on the:
i) Centauro jet algorithm, a jet algorithm for DIS,
ii) the adaptation to DIS of the modified MassDrop Tagger grooming
algorithm (mMDT).
Our adaptation relies on the geometrical separation of initial and final state radiation in the Breit frame, where I will establish the definitions of the proposed observables. The novel grooming procedure, although similar to mMDT, employs the Centauro measure used in the corresponding jet algorithm tailored to the needs of DIS. The groomed invariant mass (GIM) will also be discussed.
Per partecipare: gruppo Teams Università di Genova numero 1npbr0h (se si possiede un account Teams Unige, si può accedere con il codice.
Se invece si possiede solo un account Teams INFN, scrivere a simone.marzani@ge.infn.it per essere aggiunti come ospiti).
Seminario di Fenomenologia – Dr. Marco Letizia (Universita’ di Genova)
In this seminar I will present some recent ideas in machine learning for model independent anomaly detection in high energy physics data. In particular I will discuss models at the interception of machine learning and hypothesis testing, specifically leveraging the Neyman-Pearson lemma. I will conclude showing some preliminary experimental results on toy and simulated data.
Per partecipare: gruppo Teams Università di Genova numero 1npbr0h (se si possiede un account Teams Unige, si può accedere con il codice.
Se invece si possiede solo un account Teams INFN, scrivere a simone.marzani@ge.infn.it per essere aggiunti come ospiti).
Seminario di Fisica Teorica – Dr. Jacopo Viti (INFN Firenze e IIP-UFRN Natal, Brasile)
Entanglement evolution represents nowadays an important theoretical diagnostic to detect whether a quantum system out-of-equilibrium can eventually relax toward a stationary state at late times.
In this talk, I will introduce the main ideas and motivations beyond the study of entanglement dynamics in many-body systems by analyzing a paradigmatic model of statistical physics: the Ising spin chain.
In particular, I will review classic results such as the linear growth of the entanglement entropies and its link with thermalization. Eventually, I will discuss some new developments that were recently obtained in collaboration with O. Castro Alvaredo, Mate Lencses, and Istvan M. Szecseny.
Per partecipare: gruppo Teams Università di Genova numero 1npbr0h (se si possiede un account Teams Unige, si può accedere con il codice. Se invece si possiede solo un account Teams INFN, scrivere a simone.marzani@ge.infn.it per essere aggiunti come ospiti).
Consiglio di Sezione
Il Consiglio verterà sul seguente Ordine del Giorno:
1) Comunicazioni del Direttore
2) Varie ed eventuali
Seminario di Fenomenologia – Dr Lorenzo Bianchini (INFN Sezione di Pisa)
The mass of the W boson offers a unique opportunity for testing the electroweak sector to high precision. At present, the Standard Model of strong and electroweak interactions yields an indirect determination of the W boson mass which is more precise than the direct measurement. The gap between theory and experiment, made even more intriguing by a slight tension between the two, motivates the continuation of the experimental program. Unfortunately, at the LHC, this program has hit the wall of systematic uncertainty, mostly related to our imperfect description of hadron collisions. ASYMOW is an ERC-funded project which proposes a new approach, agnostic with respect to the microscopic picture of W boson production, to circumvent the limiting systematic uncertainties. The intrinsic model-independence of the method, joined with its robustness towards the harsh environmental conditions of proton-proton collisions, will allow for a full exploitation of the unprecedented data set collected by the CMS experiment at the LHC. By leveraging this power, a big step ahead on the experimental side seems possible. This project comes with great experimental, theoretical, and computational challenges. Its successful completion would set a milestone in precision at hadron colliders, with far-reaching implications.
Per partecipare: gruppo Teams Università di Genova numero 1npbr0h (se si possiede un account Teams Unige, si può accedere con il codice.
Se invece si possiede solo un account Teams INFN, scrivere a simone.marzani@ge.infn.it per essere aggiunti come ospiti).