iten
Home » Evento (page 5)

Tag Archives: Evento scientifico

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.

Scopri di più »

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.

Scopri di più »

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.

Scopri di più »

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.

Scopri di più »

Phenomenology of the 3-3-1 Models

 I will discuss the theoretical motivation and main features of the BSM class of models based on the  SU(3)_C x SU(3)_L x U(1) gauge group. I will then review the phenomenological analyses available in literature and present recent studies on the mass spectrum of the scalar sector.

Scopri di più »

Il desiderio e la scienza

Una tavola rotonda dedicata a “Il desiderio e la scienza”, con la partecipazione tra gli altri di Anna Di Ciaccio (Direttore INFN Tor Vergata), Giulio Ferroni (scrittore) e Ugo Amaldi (Università di Milano). Gli interventi sono moderati da Fernando Ferroni, Presidente INFN, mentre l’introduzione è a cura di P. Mauro Oliva, cappellano Enti di Ricerca MIUR. Tutto il personale è invitato a partecipare. Scarica la locandina Foto       Videoregistrazioni: Il desiderio e la scienza Pt.1 Il desiderio e la scienza Pt.2 Scarica le slide dei vari interventi: Ugo Amaldi Anna Di Ciaccio Carla Parisi  

Scopri di più »

Quarto Meeting DAFNE-Light

  Il 13 Giugno presso l’Aula Salvini edificio Alte Energie dalle 10:50 faremo il quarto incontro dedicato ad attività che coinvolgono il Laboratorio DAFNE-Luce. Questo quarto incontro sarà dedicato al progetto di Gruppo V TERA per lo sviluppo ed uso di sorgenti THz di alta intensità, e ad uno studio sul grafene che ha coinvolto anche la linea SINBAD-IR.

Scopri di più »

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.  

Scopri di più »

Multifunction Rack Control Unit and ARM Compute Board for detector control and monitoring

The efficient and safe operation of experimental setups, particle accelerators and computing centers is performed by a dedicated control sub-system mainly designed to monitor and control the core operational parameters. Typically, the control system have to be scalable, distributed and sustainable this properties being guaranteed by multipurpose equipment and preferably open source software. The Multipurpose Rack Control Unit (MRCU) is designed to monitor and control the temperature and humidity of the electronics rack environment, to monitor the 230V AC current consumption of AC plugged-in devices, to switch on/off the AC plugged-in devices. Moreover, the unit has also 2 general purpose I/O ports which can be used (or customized to be used) as interlocks, and a constant current source together with a high precision ADC for RTD based temperature measurements. The high level control software and Ethernet network connection of MRCU is performed by an ARM based compute module. Additionally, the compute module can host a communication mezzanine which provides three serial interfaces RS232, RS485 and CAN BUS.

Scopri di più »

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.

Scopri di più »