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Look up! Sfoglia il cielo con un dito: A virtual exhibition to enhance the historical astronomical atlases of the National Institute of Astrophysics
Get PDFNew technologies are revolutionizing various aspects of our lives, and likewise, digital tools are playing an increasingly crucial role in safeguarding, preserving, and valorising cultural heritage. The digitization of archival documents and ancient books, the development of augmented reality apps for museums, and the creation of virtual environments set in both accessible and restricted cultural
or landscape contexts, are examples of the use of the new technology in the field of cultural heritage. In this context, the projects “Cosmic Pages” and “Touch the Sky”
were developed. One of the main goals of these projects was the realization of the virtual exhibition Look up! Sfoglia il cielo con un dito. It is an effective virtual tool aimed at enhancing and giving maximum dissemination of the collection of the star atlases, cometographies, and selenographies at the INAF Observatories. This virtual
exhibition was designed and realized allowing the visitors to discover, explore, and understand how our knowledge of the cosmos, the Moon, and the planets has evolved and changed with time. Using the most advanced technologies, virtual reality, 3D models, videos, etc., digital visitors can explore the scientific and cultural contents of the star and cartographic atlases
A data-driven method to constrain the p¯ background in Mu2e
Get PDFThe Mu2e experiment will search for the charged lepton flavour violating process of neutrinoless coherent muon to electron conversion in the field of an Al nucleus. The expected signal is a 104.97 MeV/c electron. One of the expected backgrounds is due to ¯ ps produced by the proton beam at the Production Target and annihilating in the Stopping Target (ST). The background from ¯ p annihilation is not a dominant one, but it has a large uncertainty and it cannot be suppressed by the timing cuts used to reduce the prompt background. However at Mu2e energies, p¯ p annihilation is the only source of events with multiple simultaneous tracks coming from the ST. We exploit this unique feature and reconstruct the multi-track events
to estimate the ¯ p background
Higgs physics at Muon Collider with detailed detector simulation
Get PDFMuon collisions at multi-TeV center-of-mass energies are ideal for studying Higgs boson properties. At these energies, the production rates will allow precise measurements of its couplings to fermions and bosons. In addition, the double Higgs boson production rate could be sufficiently high to directly measure the parameters of trilinear self-couplings, giving access to the determination of the Higgs potential. This communication aims to give an overview of the results that have been obtained so far on Higgs couplings by studying the μ+μ− → H(b¯ b)ν¯ ν, μ+μ− → H(WW∗)ν¯ ν and μ+μ− → H(b¯ b)H(b¯ b)ν¯ ν processes. All the studies have been performed with a detailed simulation of the signal and physics background samples and by taking into account the effects of the beam-induced background on the detector performance. Evaluations of Higgs boson production cross-sections sensitivities and results on the uncertainty on double Higgs production cross-section, together with the trilinear self-coupling, will be discussed at a center-of-mass energy of 3 TeV
Production of antiprotons in cosmic rays with new cross-sections
Get PDFGalactic cosmic ray antiproton flux is used to study possible traces of dark matter annihilation. In this work, the background of antiprotons produced by galactic cosmic rays interacting with the interstellar medium has been re-evaluated on the basis of an improved model of antiproton production cross-section and using state-of-art galactic and heliospheric cosmic ray transport codes. We found that the
antiproton flux measured by AMS-02 is underestimated by the model of about 3% in the range between 4 and 40GeV with a significance higher than 6σ, considering only the cross-section uncertainties. However, the full evaluation of the significance of the observed discrepancy depends on other modelization uncertainties, to be estimated in further work
Direct measurement of the neutrino mass: The Holmes experiment
Get PDFThe Holmes experiment aims to directly measure the neutrino mass using a calorimetric technique, analysing the electron capture decay spectrum of 163Ho. It employs cryogenic microcalorimeters with Transition Edge Sensors (TES)
organised in arrays, encapsulating the isotope. Precise implantation of 163Ho into detectors is achieved by a 50kV isotope separator, eliminating other radioactive isotopes, especially 166mHo, to minimise background noise in the measurement
Sensitivity and specificity evaluation of refractive condition self-assessment
Get PDFThe self-report questionnaires could be used as alternative tests to detect refractive errors, although objective and subjective refraction are considered the gold standard procedure. This study evaluated the sensitivity and specificity of two self-questionnaires (Q1 and Q2) to identify refractive status. Q1 required to identify refractive error by only scientific term: myopia, hyperopia, astigmatism and presbyopia. In Q2, the options combine the scientific term with a descriptive explanation. A multi-center, randomized double-blind study was conducted. Two
hundred and forty-five participants completed one of two questionnaires before a non-cycloplegic eye examination by an optometrist. Sensitivity and specificity were determined comparing the self-reported responses with the classification obtained from subjective refraction. For myopia, the Q1 and Q2 reported a good sensitivity and specificity. The relationship between the operating characteristics of Q1 and Q2 was evaluated by the ROC curve. Both the questionnaires used in the study resulted reliable for identifying myopia although they were not highly accurate for the identification of the remaining visual defects
Un database condiviso ad accesso libero per lo studio archeologico dei cimiteri medievali in Italia settentrionale
Get PDFThis paper presents the database and the open access georeferenced online map of the CAMIS project of the University of Padua, which aims to catalogue and analyse late antique and medieval funerary contexts as a response to the scattered documentation and partial publications on this subject. After describing the structure and software used for the database and the online map, some numbers are presented relating to the more than thousand sites already entered in the system and the kind of results that can be advanced, underlining some of the problems encountered. The paper calls for the optimization of data management to foster open archaeological research, highlighting the need for a unified approach to study complex historical phenomena. The CAMIS database, incorporating standardized vocabularies for systematic and statistical analysis, is vital for unlocking new research avenues and addressing gaps in current knowledge. The project exemplifies the power of open science, promoting collaboration and enriching archaeological research with a rapidly growing, vast dataset
Strange-Meson Spectroscopy with COMPASS
Get PDFWhile the spectrum of non-strange light mesons is well known, many predicted strange mesons have not yet been observed, and many potentially observed states require further confirmation. Using the K− component of the hadron
beam at the M2 beamline at CERN, we study the strange-meson spectrum with the COMPASS experiment. The flagship channel is the K−π−π+ final state, for which COMPASS has obtained the world’s largest sample. Based on this sample, we have performed the most detailed and comprehensive partial-wave analysis of this final state to date. For example, we observe a clear signal from the well-known K∗2 (1430), and for the first time we study the K2(1770), K2(1820), and K2(2250) in a single analysis. We also find evidence for a supernumerary signal called K(1630), suggesting that this signal is a pseudoscalar exotic strange meson
The D+s decay into π+K0SK0S reaction and the I=1 partner of the state
Get PDFTwo identified decay modes of the D+s → π+K∗+K∗−, π+K∗0K¯ ∗0 reactions producing a pion and two vector mesons are discussed in this talk. The posterior vector-vector interaction generates two resonances that we associate to
the f0(1710) and the a0(1710) recently claimed, and they decay to the observed K+K− or K0 SK0 S pair, leading to the reactions D+s → π+K+K−, π+K0 SK0 S. The results depend on two parameters related to external and internal emission. We
determine a narrow region of the parameters consistent with the large Nc limit within uncertainties which gives rise to decay widths in agreement with experiment. With this scenario we make predictions for the branching ratio of the a0(1710) contribution to the D+s → π0K+K0 S reaction, finding values within the range of (1.3±0.4)×10−3. We obtain predictions in good agreement with the BESIII measurements, confirming the new a0(1710) (a0(1817)) resonance. This is an important state and will shed light into the structure of scalar mesons in light quark sector and other relevant
issues currently under debate in hadron physics