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The Science and Status of the Electron Ion Collider (EIC)

Despite many decades of experimental and theoretical efforts around the world many aspects of the role gluons play in QCD remains a mystery. While we know gluons are important, we don’t know exactly how the properties of hadrons such as mass and their spin, emerge from their interactions amongst themselves and with quarks. We don’t know exactly exactly exactly how the nuclei are bound together. We don’t know if there is saturated phase of nuclear matter predominantly made of gluons at high energy in all nucleons and nuclei, as is predicted by QCD. A high-energy, high-lumonisity polarized electron-ion collider is proposed to address these compelling unsolved questions in QCD.  On January 19, 2020 the US department of Energy declared the start of the EIC project and that the site would be Brookhaven National Laboratory (BNL) using the already existing Relativistic Heavy Ion Collider (RHIC). The Thomas Jefferson National Laboratory (TJNF or JLab) will be work with BNL closely as equal partner, and both together with the world wide EIC enthusiasts organized under the umbrella of EIC Users Group will realize this facility at the end of the decade. In this talk, I will highlight the exciting science of EIC, and review the current activities underway aimed at realizing the first collisions for physics at the turn of this decade.     Istruzioni per partecipare: La connessione ai seminari online dovrà essere effettuata tramite Vibe. Per partecipare è possibile scegliere tra due modalità: ·collegarsi tramite il client di Vibe ( *download), inserendo semplicemente ...

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Observation of Excess Electronic Recoil Events in XENON1T

We report results from searches for new physics with low-energy electronic recoil data recorded with the XENON1T detector. With an exposure of 0.65 tonne-years and an unprecedentedly low background rate of 76 ± 2 events/(tonne x year x keV) between 1-30 keV, the data enables competitive searches for solar axions, an enhanced neutrino magnetic moment using solar neutrinos, and bosonic dark matter. An excess over known backgrounds is observed below 7 keV, rising towards lower energies and prominent between 2–3 keV. The excess is interpreted as due to the physics channels mentioned above, as well as due to a new source of background previously not considered, as the beta decay of tritium. Istruzioni per partecipare: La connessione ai seminari online dovrà essere effettuata tramite Vibe. Per partecipare è possibile scegliere tra due modalità: ·collegarsi tramite il client di Vibe ( *download), inserendo semplicemente il proprio nome e il Meeting ID: 4856329430 (opzione consigliata)   Link: https://vibe.ezuce.com/launcher/?meetingID=4856329430 Or by using WebRTC in Chrome or Firefox : https://vibe.ezuce.com/webrtc/?meetingID=4856329430 (*) Versioni richieste:   Windows 7 or newer Mac OS 10.8.5 or higher Linux 3-4 years old, version 7 or higher

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T2K & Beyond: dcp measurements in T2K and prospects in neutrino physics in Japan

Nature has recently reported on its cover about the indication by the T2K collaboration of a difference between the fundamental behavior of neutrinos and of antineutrinos, their anti-matter counterparts. The T2K Collaboration (Tokai to Kamioka) found a mismatch in the way neutrinos and antineutrinos oscillate.  In particular it was observed that the measured oscillation probability is not the same for both. This asymmetry is known as charge-conjugation and parity (CP) violation.  If different from zero, it may help us understand the origin of the current prevalence of matter over antimatter in the Universe. In this seminar we will illustrate the present and past contribution of the T2K experiment to the discoveries of the Neutrino Oscillation, the impact of new result and prospects (medium and long term) for the Neutrino Physics in Japan. After analysing nine years’ worth of data, the T2K experiment reached a level of statistical significance high enough to provide an indication that CP violation occurs in these fundamental particles. More precise measurements are needed to confirm these findings. However, these measurements do strengthen previous observations and pave the way towards a future discovery. A new generation of experiments under construction might provide an answer to the problem of the ‘missing’ antimatter in the next ten years. Istruzioni per partecipare: La connessione ai seminari online dovrà essere effettuata tramite Vibe. Per partecipare è possibile scegliere tra due modalità: ·collegarsi tramite il client di Vibe ( download), inserendo semplicemente il proprio nome e il Meeting ID: 6279852956 (opzione consigliata) (*) Versioni richieste: Windows ...

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Fermi and multi-messenger observations

Multi-messenger astronomy turned into a reality in the past five years, with the first detection of Gravitational Waves in 2015, the first gravitational and electromagnetic observations of the coalescence of neutron stars in 2017, the first evidence of a common source of neutrinos and energetic photons from a distant galaxy in 2017. The Fermi telescope, operating as an all-sky monitor for high energy gamma-ray transients, is central to such observational efforts which include a large community of different observatories. In this seminar I will review the scientific context, the current observational scenario and the future prospects for Fermi and other players of this global endeavor.

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Fourth Rome Physics Encounter @LNF

The encounter is postponed until further notice following the restrictions from INFN regarding organised meetings.   This informal meeting is the fourth of the Rome physics encounter series. It aims at bringing together young speakers working or collaborating with the research groups in the Rome area. In the spirit of workshops and conferences at LNF, talks will be presented in a pedagogical way and plenty of time is scheduled to allow discussions among participants. The encounters will be synchronised with a selected LNF General Seminar, held in the afternoon at 2.30pm. The lunch is offered to all registered participant at the LNF canteen.

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