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Measurement of the in-medium modifications of the Δ resonance has been performed at a PAINUC experiment. Signatures of the excitation of nuclear collective states and the first experimental evidence for thermal emission of photons have been obtained from the analysis of the π± 4He data taken at Tπ =106 MeV.

Measurement of the in-medium modifications of the Delta resonance has been performed at a PAINUC experiment. Signatures of the excitation of nuclear collective states and the first experimental evidence for thermal emission of photons have been obtained from the analysis of the [pi] super(+ or -) super(4)He data taken at T[pi] = 106 MeV.

After its successful campaign of measurements beyond the Polar Arctic Circle, the PolarquEEEst experiment measured the cosmic charged particle rate at sea level in a latitude interval between 35 ∘ N and 82 ∘ N. In this paper, these measurements are described and the corresponding results are discussed.

Multiplicities of charged hadrons produced in deep inelastic muon scattering off a 6 LiD target have been measured as a function of the DIS variables x Bj , Q 2 , W 2 and the final state hadron variables p T and z . The distributions are fitted with a single exponential function at low values of to determine the dependence of on x Bj , Q 2 , W 2 and z . The z -dependence of is shown to be a potential tool to extract the average intrinsic transverse momentum squared of partons, , as a function of x Bj and Q 2 in a leading order QCD parton model.

The eruption of the Hunga-Tonga volcano in the South Pacific Ocean on January 15, 2022, at about 4:15 UTC, generated a violent explosion, which created atmospheric pressure disturbances in the form of Rayleigh-Lamb waves detected all over the globe. Here we discuss the observation of the Hunga-Tonga shock-wave performed at the Ny-Ålesund Research Station on the Spitsbergen island, by the detectors of the PolarquEEEst experiment and their ancillary sensors. Online pressure data as well as the results of dedicated offline analysis are presented and discussed in details. Results include wave arrival times, wave amplitude measurements and wave velocity calculation. We observed five passages of the shock wave with a significance larger than 3 σ and an amplitude up to 1 hPa. The average propagation velocity resulted to be (308 ± 0.6) m/s. Possible effects of the atmospheric pressure variation associated with the shock-wave multiple passages on the cosmic-ray rate at ground level are also investigated. We did not find any significant evidence of this effect.

After its successful campaign of measurements beyond the Polar Arctic Circle, the PolarquEEEst experiment measured the cosmic charged particle rate at sea level in a latitude interval between 35$$^{\\circ }$$∘ N and 82$$^{\\circ }$$∘ N. In this paper, these measurements are described and the corresponding results are discussed.

The Extreme Energy Events Project is an educational and scientific initiative lead by the Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi (CREF) and the Istituto Nazionale di Fisica Nucleare (INFN), two research Institutions under the control of the Italian Ministero dell’Universit`a e Ricerca (MUR). The EEE Project studies cosmic rays by means of a series of detectors located inside Italian high schools or INFN/University laboratories. The detectors have been built and are operated with the strong cooperation of students and teachers. Data from the different EEE detectors are centrally collected, reconstructed, and analyzed for scientific publications. However, they are also distributed to the students, who actively participate in the study of the properties of the muon flux and present their work at general meetings organized both online or in-person. It is important to underline that the Project involves the student during an entire year (and sometimes even more) allowing a continuous interaction with the researchers involved. A description of the outreach activities and of their impact on the students’ learning curve will be provided, together with a few examples of activities that led to students-signed publications.

Since 2019, three scintillator-based cosmic ray detectors, readout by SiPM and controlled by low-cost electronics, are installed in the scientific research site in Ny Ålesund (Svalbard) at 79°N, recording muons from secondary cosmic rays. The detectors are part of the EEE Project, a joint project of Centrofermi and INFN, involving almost 100 secondary schools in Italy. After collecting nearly 5 years of data, we were able to analyse the muon rate time series and observe an evident oscillating component with a period of about one year. Applying the Lomb-Scargle periodogram technique, based on sinusoidal fit optimization, we could quantify the annual component, after verifying its independence from environmental and experimental factors.

We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive ω meson muoproduction on the proton at COMPASS using 160 GeV/c polarised μ+ and μ- beams impinging on a liquid hydrogen target. The measurement covers the range 5.0 GeV/c2

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