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Time from classical relativistic physics toward quantum gravity

I survey briefly the main lessons about the nature of physical time from (special and general) relativistic physics. They amount to a progressive dismissal of common sensical assumptions about time and a difficult learning process about what are its real physical features. I then outline how the search for quantum theory of gravity and spacetime is challenging even more our understanding of the spatiotemporal aspects of the world, and suggests a more radical, complete disappearance of time (and space) from the fundamental structure of the universe. The conceptual challenges of this radical disappearance of time will be emphasised, alongside the physical ones.

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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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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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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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PHOTON 2019  –  International Conference on the Structure and the Interactions of the Photon. Satellite Workshop: Photon Physics and Simulation at Hadron Colliders.

This conference is part of the series initiated in 1973 in Paris, as an International Colloquium on Photon-Photon Collisions at Electron-Positron Storage Rings. The latest Photon conferences took place in CERN-Geneva (2017), Novosibirsk (2015), Paris (2013), Spa (2011), Hamburg (2009), Paris (2007), Warsaw (2005), Frascati (2003), Ascona (2001), Freiburg (2000), Ambleside (1999), and Egmond aan Zee (1997).   This year edition will feature a two-day workshop on Photon Physics and Simulation at Hadron Colliders, focused on photon phenomenology at the LHC, on June 6-7. More info on this workshop can be found at: https://indico.cern.ch/event/783361/   The conference scientific program will include topics related to photon-photon and photon-hadron collisions as well as final-state photon production at current and future colliders. In addition, high-energy astrophysics gamma-rays, and photon-related searches of new physics (axions, dark/hidden photons, …) will also be discussed. The conference format consists of talks in plenary sessions only. The LOC offers a number of young researcher grants to attend the conference. Interested participants are invited to send an e-mail to photon19_loc@lists.lnf.infn.it with their motivated request for support. The 2019 Edition of the Colloquium will be hosted in the first established laboratory of the Italian National Institute of Nuclear Physics (awarded also as EPS historical site) the place where in 1959, exactly 60 years ago, the first Italian Electro-Syncroton started its operations. Here, the year after, the first matter-antimatter collider (AdA) ever built saw the light.  

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Magneti e Vuoto: Le Tecnologie degli Acceleratori per un Laboratorio Aperto

SeminarIndustriali 2019 INFN-Laboratori Nazionali di Frascati L’INFN e i Laboratori Nazionali di Frascati portano avanti una intensa attività di ricerca tecnologica i cui prodotti, oltre che nella ricerca fondamentale, trovano applicazione in diversi campi di interesse sia sociale che industriale. In questo ciclo di seminari, dedicati ognuno a tecnologie e infrastrutture di interesse per un determinato settore, i LNF vogliono continuare il dialogo aperto con altri Enti, Università, Istituzioni ed Imprese in occasione dell’Open Day Imprese a Giugno 2017. Magneti e Vuoto: Le Tecnologie degli Acceleratori per un Laboratorio Aperto Le tecnologie che orbitano attorno alla realizzazione di un acceleratore sono molteplici e riguardano lo sviluppo della componentistica elettromeccanica per campi magnetici, le tecnologie del vuoto, delle superfici e dei trattamenti termici, i controlli di qualità degli elementi magnetici che servono a guidare i fasci, assieme alla gestione “in tempo reale” di detti fasci, sia in ambiente scientifico che tecnico. Presso i Laboratori Nazionali di Frascati dell’INFN (Istituto Nazionale di Fisica Nucleare) si è così sviluppata un’infrastruttura in grado di offrire una serie di servizi nel campo delle misure e progettazioni magnetiche e nei trattamenti termici in ultra alto vuoto che punta ad aprirsi anche alle realtà private locali e nazionali.

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Innovative detectors for X-rays, gammas and neutrons: a bridge between magnetic confinement fusion and laser produced plasmas

Our research activity was born from a collaboration between ENEA and INFN in Frascati in order to realize advanced diagnostics on plasmas coming from magnetic confinement fusion and from high intensity lasers. GEM detectors found interesting applications for soft-X ray diagnostic on Tokamaks and Laser Produced Plasmas (LPPs). In addition, GEM technology combined with Timepix chip read-out electronics (GEMpix detector) allowed high performance soft-X ray imaging and temperature measurements on LPPs. Experience coming from Timepix technology allowed also some innovative measurements on gamma photons and neutrons, which have great interest to monitor fusion reactions in Tokamaks and high energy electrons and gammas in LPPs. In the seminar, some results on GEM soft-X ray diagnostic obtained in the experimental campaigns of the FTU (ENEA, Frascati), KSTAR (south Korea) and EAST (China) Tokamaks will be shown. Then imaging and temperature diagnostics with GEMpix detector will be introduced and some results coming from ABC (ENEA Frascati), ECLIPSE (Bordeaux, France) and VEGA (Salamanca, Spain) laser facilities will be presented. Finally, gamma and neutron measurements realized with silicon and diamond Timepix detectors will be also shown, pointing out their potential applications for particles diagnostic in plasma physics.

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Recent discoveries at LHCb

The LHC Run 2 ended in 2018, and an unprecedented amount of b- and c-hadron decays was collected at the LHCb experiment, opening several paths to unexplored physics searches. Although being designed for precision measurement in the b sector, LHCb is progressively showing its potentials in a vast physics programme across different sectors. In this seminar, I will give a review on three new and high-impact LHCb measurements concerning exotic-hadron spectroscopy, CP violation and lepton-flavour universality.

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Spring Institute 2019 The importance of being light: Axions, Nambu-Goldstone Bosons, and Vector Bosons in the Dark

Aim of the meeting: This informal meeting is intended for extensive discussions on  phenomenological aspects of the physics of light and ultralight particles, axions, Nambu-Goldstone bosons, and new  vector bosons feebly coupled to the standard model.      Seminars:     Tuesday 21/05 11:00am        Luca Visinelli (Nordita & Uppsala Univ.)  “Axion miniclusters and implications for axion detection” (Aula Salvini)   Tuesday 21/05 2:30pm         Giorgio Arcadi  (Roma 3 Univ.)  “New light bosons from tritium decay” (Aula Salvini)   Wednesday 22/05 11:00am:      Luca Di Luzio (Pisa University) “Nambu-Goldstone bosons in Cosmology”  (Aula Seminari)   Wednesday 22/05, 2:30pm        Daniele Barducci (Roma University) “Neutral hadrons disappearing into the darkness” ​​​​​​​​​​​​​​(Aula Salvini)                                 

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