Tag Archives: Evento scientifico

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

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 …

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.

POSTPONED FOR SANITARY REASONS New date will be announced   This mini-workshop is dedicated to perovskites that have attracted increasing attention in recent years for their excellent performance in solar cells and photodetectors.  

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.

This meeting is aimed to discuss the activities and synergies between UK and IT groups for the assembly of the ITk outer endcaps.

The problem of an accurate ion-solid interaction potential is one of the basic problems in description of the ion-solid interaction [1]. It has been shown how one can construct the universal rainbow channeling proton-crystal interaction potential [2]. It has been done by modifying the Moliere’s interaction potential applying the crystal rainbow theory [3, 4]. This potential merges the ZBL potential, for the small impact parameters, and the Molière’s potential, with the Thomas-Fermi radius, for the large impact parameters. The accuracy of the obtain interaction potential should be investigated in a series of high resolution transmission channeling experiments for different proton-crystal combinations. Further, application of the presented rainbow morphological method for 5 keV protons transmitted through a graphene [5] and generally through 2D materials has been disused. [1] M. Nastasi, J. W. Mayer and J. K. Hirvonen, Ion-Solid Interaction: Fundamentals and applications (Cambridge University Press, Cambridge, 1996). [2] S. Petrović, N. Starčević and M. Ćosić, Universal axial (001) rainbow channeling interaction potential, Nuclear Instruments and Methods in Physics Research B, 447, pp. 79-83 (2019). [3] S. Petrović, L. Miletić, and N. Nešković, Theory of rainbows in thin crystals: the explanation of ion channeling applied to Ne10+ ions transmitted through a <100> Si thin crystal, Phys. Rev. B 61, 184 (2000). [4] N. Nešković, S. Petrović, and M. Ćosić, Rainbows in Channeling of Charged Particles in Crystals and Nanotubes (Springer Nature, Cham, 2017). [5] M. Ćosić, M. Hadžijojić, M, Rymzhanov, S. Petrović and S. Bellucci, Investigation of the graphene thermal motion by …