Results from the AMS02 experiment on the International Space Station

AMS02 experiment has collected data on Cosmic Rays for three years on the International Space Station, since its installation on May, 19 2011. The fluxes of electrons, positrons and protons, together with the results on Boron and Carbon ratio, will be discussed, as well as their implication in terms of Cosmic Ray propagation and in terms of limits on the existence of Dark Matter in the electroweak energy range

Measurement of Gamma(phi -> eta' gamma)/Gamma(phi -> eta gamma) and the pseudoscalar mixing angle

We have measured the radiative decays phi -> eta gamma, phi ->etaprime gamma selecting pi+ pi- gamma gamma gamma final state in a sample of about 5 times 10^7 phi mesons produced at the Frascati phi factory DAFNE. We obtain Gamma(phi -> etaprime gamma)/Gamma(phi -> eta gamma)=(4.70 +- 0.47 +- 0.31) times 10^-3. From this result we derive new accurate values for the branching ratio BR(phi ->etaprime gamma) = (6.10 +- 0.61 +- 0.43) times 10^-5, and the mixing angle of pseudoscalar mesons in the flavour basis phi_P=(41.8 +1.9 -1.6) degrees.Comment: Submitted to Phys. Lett.

Study of the Decay phi --> eta pi0 gamma with the KLOE detector

In a sample of 5.3x10^7 phi-decays observed with the KLOE detector at the Frascati phi-factory Dafne we find 605 eta pi0 gamma events with eta --> gamma\gamma and 197 eta pi0 gamma events with eta --> pi+ pi- pi0. The decay phi --> eta pi0 gamma is dominated by the process phi --> a0 gamma. From a fit to the eta pi0 mass spectrum we find BR(phi --> ao(980) gamma)= (7.4 +- 0.7)x10^-5.Comment: 12 pages, 6 figures, submitted to Phys.Lett.

Electric dipole moments and the search for new physics

Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well beyond those reached directly at high energy colliders. Discrimination between different physics models, however, requires complementary searches in atomic-molecular-and-optical, nuclear and particle physics. In this report, we discuss the current status and prospects in the near future for a compelling suite of such experiments, along with developments needed in the encompassing theoretical framework.Comment: Contribution to Snowmass 2021; updated with community edits and endorsement

New results from the Muon g-2 experiment at Fermilab

The Muon g-2 experiment at Fermilab aims to measure the muon magnetic moment anomaly, aμ = (g − 2)/2, with a final accuracy of 140 parts per billion. The experiment’s first result from the 2018 dataset, Run 1, was published in 2021 and confirmed the previous result obtained at Brookhaven National Laboratory with a similar sensitivity. I will present the result based on the 2019 and 2020 datasets, Runs 2 and 3, which contain a factor of four more data than in Run 1, thus entering a new sensitivity regime to g-2. I will discuss the improvement in the accuracy of aμ and the future prospects for the experiment. I will then discuss the implications of the comparison of the new measurement with the last Standard Model predictions for muon g-2.&nbsp;</p

Precision Cosmic Ray physics with space-born experiment

More than 100 years after their discoveries, cosmic rays have been extensively studied, both with balloon experiments and with ground observatories. More recently, the possibility of mounting detectors on satellites or on the International Space Station has allowed for a long duration (several years) continuous observation of primary cosmic rays, i.e. before their interaction with the earth atmosphere, thus opening a new regime of precision measurements. In this review, recent results from major space experiments, as Pamela, AMS02 and Fermi, as well as next generation experiments proposed for the International Space Station, for standalone satellites or for the yet to come Chinese Space Station, will be presented. The impact of these experiment on the knowledge of Cosmic Ray propagation will also be discussed

La ricerca di nuova fisica nel vuoto quantistico

La Meccanica Quantistica ha rivoluzionato la fisica imponendo idee e modi di pensare nuovi ed apparentemente in contraddizione con la realtà quotidiana. Il concetto di vuoto quantistico è senz'altro fra quelli che richiedono una modifica radicale del nostro approccio mentale: dal vuoto come Nulla al vuoto come Tutto. All'interno di questo Tutto si crea energia, sotto forma di onde elettromagnetiche, e si creano particelle che modificano le proprietà macroscopiche della materia. Attraverso misure di precisione, questi effetti sono stati isolati in laboratorio e ci consentono di esplorare non solo la materia nota, ma anche quella ancora sconosciuta