Tag Archives: Evento scientifico

The KM3NeT collaboration is constructing two underwater neutrino detectors in the Mediterranean Sea: the ARCA (Astroparticle Research with Cosmics in the Abyss) and ORCA (Oscillation Research with Cosmics in the Abyss) detectors. ARCA is located at a depth of 3500m offshore the Sicilian coast of Capo Passero and aims the detection of astrophysical neutrinos in the TeV–PeV range. It will have a volume of about 1 km3 and having an optimal visibility for the Southern sky, it is complementary to IceCube. Moreover, the transparency of the Mediterranean water allows for a very good angular resolution in the reconstruction of neutrino directions of all flavours. The ORCA detector, at a depth of 2500m offshore the French coasts, has been optimized to detect atmospheric neutrinos in the GeV range for the measurement of the neutrino mass ordering and neutrino oscillation parameters. The first Detection Units, that are strings hosting the optical sensors, have been already deployed by the KM3NeT collaboration in the French and Italian sites. Results from the first data together with the status and the science perspectives of the KM3NeT project will be presented. More ways to join: Join from the meeting link https://infn-lnf.webex.com/infn-lnf/j.php?MTID=m932850ac128270a8e71f9e8ee244e6a9 Join by meeting number Meeting number (access code): 163 969 5456 Meeting password: 24062021

Aim of the meeting: The aim of the mini-workshop is to present a proposal for a new experiment (SHADOWS) to search for feebly interacting particles at the CERN North Area. The interplay with current and future experimental activities by the NA62 experiment is also discussed. Program Thursday June 10 14:30 “Introduction” 14:40 Gaia Lanfranchi (LNF INFN) “The search for Feebly-Interacting Particles within the Physics Beyond Colliders activity at CERN” 15:05 Matthew Moulson (LNF INFN) & Tommaso Spadaro (LNF INFN) “Physics at a high-intensity kaon beam facility at the CERN SPS” 15:50 Gaia Lanfranchi (LNF INFN) “The SHADOWS project to search for Feebly-Interacting Particles at CERN” 16:20 General Discussion 17:00 Conclusion More ways to join: Join from the meeting link https://infn-lnf.webex.com/infn-lnf/j.php?MTID=mc0dfed7c6fdd4bf8e9deda8720e7a6a1 Join by meeting number Meeting number (access code): 163 444 8331 Meeting password: 10062021

Overview High Precision X-ray Measurements 2021 conference is the second edition of the HPXM2018 workshop, held at the INFN Laboratories of Frascati in 2018. In the wake of the big success of the previous edition, HPXM2021 is planned both to consolidate the existing interconnections between different research teams and to help creating new ones, creating the opportunity for all the participants to discuss and share the results of their activities focusing on a common protagonist: X-ray precision detection.  The aim of this workshop is to update the participants on the most recent developments in X-ray detection and their possible impacts in various sectors like, nuclear physics, quantum physics studies, XRF, XES, EXAFS, PIXE, plasma emission spectroscopy, monochromators, synchrotron radiation, telescopes and space engineering, medical applications, food and beverage quality control and elemental mapping. In the HPXM2021 edition, also the topics of radioprotection and X-ray tracing simulations will be covered with dedicated sessions. A special focusing will also devoted to graphite mosaic crystals and their applications. The scientific program consists of invited lectures from distinguished scientists, oral presentations given by the participants technical presentations given by the sponsors, which will be also present for the whole conference duration with fixed stands to show their latest products. Main Topics: X-ray energy detectors X-ray position detectors Spectrometers X-ray tracing simulations Radioprotection X-ray optics Graphite based applications X-ray imaging Cultural heritage applications of X-rays X-rays in astrophysisc Medical applications X-rays in nuclear physics Best presentation award: A best presentation contest will take place to …

The KOTO experiment at J-PARC searches for the CP-violating rare decay KL->pi0 nu nubar. The branching ratio of this decay is predicted to be 3e-11 in the standard model (SM). Because of the small theoretical uncertainty in the prediction, the decay is considered to be a good testing ground to explore new physics beyond the SM. KOTO presented preliminary findings on the search in the analysis of the data taken from 2016 to 2018 at the KAON conference in 2019. At the time, existence of four candidate events in the signal region with a small background expectation was reported, with a single event sensitivity of 7e-10. After unveiling them, we further studied possible background sources and found that backgrounds cause by charged kaon contamination in the neutral beam and scattered KL decays could be larger than expectation. We confirmed their contributions by using special data taken in 2020 and concluded that the number of the observed events is statistically consistent with the background expectation. Details of the analysis will be explained in this seminar. In addition we will discuss prospects of the KOTO experiment, including sensitivity projection in near future and next generation experiment, KOTO Step-2, for further sensitivity that aims to observe O(100) events. More ways to join: Join from the meeting link: https://infn-lnf.webex.com/infn-lnf/j.php?MTID=m537fe7ae0e2ce9f07d44eb61c377927a Join by meeting number Meeting number (access code): 163 912 4499 Meeting password: 27052021

The TOTEM experiment at LHC has performed total and differential elastic p-p cross-section measurements at different LHC energies. Since 2018 a first hint of the presence of the Odderon was found in TOTEM results. Now the discovery has been confirmed after a comparison with the p-bar-p data measured by the D0 collaboration at Fermilab. The comparison of the two experiment results led to the first experimental observation of the exchange of the Odderon with a significance of 5.4σ. The Odderon, first theorized in 1973, represents the C-odd counterpart of the Pomeron, the dominant Regge trajectory in the soft high energy diffractive interactions. The Odderon emerges not only in the Regge framework, but also in QCD theory where it can be modelled as an exchange of a colourless C-odd gluonic compound. States comprising two, three or more gluons are usually called “glueballs”, and their observation represents a key test of the QCD. The talk will give a theoretical introduction to the Odderon in the context of both Regge and QCD frameworks, highlighting the best strategy to observe such enigmatic object at the LHC. The TOTEM experiment and results will be described and a detailed report of the latest analysis, in collaboration with D0, will be given. The future measurements of TOTEM at a centre-of-mass energy of 14 TeV will be briefly commented as well. More ways to join: Join from the meeting link: https://infn-lnf.webex.com/infn-lnf/j.php?MTID=m6cebc17c489f7f980507828a4169c690 Join by meeting number: Meeting number (access code): 163 403 6625 Meeting password: 20052021

Dipole moments of elementary particles served since the dawn of particle physics as an important test bench for theoretical models. Nowadays, they provide a powerful probe for new physics beyond the Standard Model, and their importance have been strongly boosted by the long-standing and recently confirmed deviation of the anomalous magnetic moment of the muon (g-2) form theoretical predictions. While there are intensive experimental plans to improve the muon g-2 measurement, and investigations of the dipole moments of the electron are continuously improved, searches for an electric dipole moment (EDM) of the muon have been recently performed only as a by-product of g-2 experiments. We propose here a dedicated experiment to search for a muon EDM with a frozen-spin technique in a storage magnet, where the (g-2)-dependent spin precession on the orbital plane is canceled by an electric field, while vertical precession due to a non-null EDM is searched for, with a goal sensitivity of 6 x 10^-23 e*cm, three orders of magnitude below the current bound. A muon EDM observation would reveal sources of CP violation beyond the Standard Model, that could give a clue about the origin of the matter-antimatter asymmetry in the Universe.   More ways to join: Join from the meeting link https://infn-lnf.webex.com/infn-lnf/j.php?MTID=m8ca1a9b6d709bd37a676e24193cf495b Join by meeting number Meeting number (access code): 163 527 7084 Meeting password: 13052021

Over the past decade, measurements involving the flavour changing neutral current transition $b\to s{\ell }^{+}{\ell }^{-}$ have shown tantalising tensions with Standard Model (SM) predictions. However, our current understanding of the hadronic uncertainties in these predictions hinders our ability to interpret these as physics beyond the SM. In order to resolve this impasse, measurements of observables that are theoretically pristine in processes that are accidentally suppressed in the SM are of paramount importance. Observables in $B_s^0\to {\mu }^{+}{\mu }^{-}$ decays as well a lepton flavour universality tests in $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ transitions are perfect examples of such measurements. In this mini-workshop, we will present the latest results in $B_s^0\to {\mu }^{+}{\mu }^{-}$ decays and the updated measurement of $R_K=BR(B^{+}\to K^{+}{\mu }^{+}{\mu }^{-})/BR(B^{+}\to K^{+}{e}^{+}{e}^{-})$ using the complete dataset collected by the LHCb experiment, and we will discuss the theoretical implications. Program Wednesday May 5 14:30 “Introduction” 14:40   Marco Santimaria  (LNF INFN) “Measurement of $B^0\to {\mu }^{+}{\mu }^{-}$ decays with Run 1 + Run 2 data” 15:20   Flavio Archilli (University of Heidelberg, Germany) “Precision tests of the Standard Model with $b\to s{l}^{+}{l}^{-}$ decay” 16:00 Gino Isidori (University of Zurich, Switzerland) “Theoretical implications of recent measurements of B-meson decays” 16:40 General Discussion 17:00 Conclusion

Lepton flavour violation is prohibited in the Standard Model of particle physics, thus its observation would clearly spots out the existence of physics beyond it. The muon sector is the most promising in this field. Muon properties, such as lifetime and mass, enable to construct very high intense and low energy -beams to be then transported on a target of a dedicated experimental apparatus and measure the emerging decay products. The lepton flavour violating decays under study are $\mu$ → e $\gamma$ and $\mu$ → eee; in addition the $\mu$ to e conversion is very promising channel as well. In the intensity frontier physics four experiments are in the commissioning phase aiming at searching for deviations from the Standard Model predictions a in the range 10−14÷10−17, depending on the process under study, thanks to innovative detector and beam line technologies. Currently two experiments for the measurement of the $\mu$ to e transitions are in preparation, Mu2e @FNAL and COMET @J-PARC; the MEG II experiment @Paul Scherrer Institut will measure the $\mu$→ e $\gamma$ decay and the Mu3e the $\mu$ → eee also @PSI. In the talk I will review possible Standard Model extensions from a phenomenological point of view and how future experiments results are complementary to define the nature of new physics, in case any evidence arises. In the second part of the talk I will concentrate in the MEG case, the results from the first phase of the experiment and the MEG II perspectives.   More ways to join: Join …

The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) has been designed to measure ultra-high energy cosmic rays (UHECRs) and observe cosmic neutrinos from space and with sensitivity over the full celestial sky for these extremely energetic cosmic messengers. POEMMA will observe the extensive air showers (EASs) from UHECRs and UHE neutrinos above 20 EeV via air fluorescence. Additionally, for cosmic neutrinos above 20 PeV POEMMA will observe the Cherenkov signal from upward-moving EASs induced by Earth-interacting tau neutrinos. The POEMMA spacecraft are designed to quickly re-orientate to view neutrino transient sources and follow these to obtain unparalleled neutrino flux sensitivity. POEMMA represents the final goal of the JEM-EUSO program. Developed as NASA Astrophysics Probe-class mission, POEMMA consists of two identical satellites flying in loose formation and 525 km altitude orbits. Each POEMMA instrument incorporates a wide field-of-view (45°) Schmidt telescope with over 6 m2 of collecting area. The hybrid focal surface of each telescope includes a fast (1 ms) near-ultraviolet camera for EAS fluorescence observations and an ultrafast (10 ns) optical camera for Cherenkov EAS observations. In a 5-year mission, POEMMA will provide measurements that open new multi-messenger windows onto the most energetic events in the universe, enabling the study of new astrophysics and particle physics at these otherwise inaccessible energies. During this seminar the mission science and design will be reported as well as the path towards its realization.   More ways to join: Join from the meeting link https://infn-lnf.webex.com/infn-lnf/j.php?MTID=ma031e54bc19051e8c5150052f6167d0e Join by meeting number Meeting number (access code): 163 849 …