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Hadronisation of heavy quarks in small systems with ALICE at the LHC
Get PDFProduction measurements of charm hadrons, particularly the ratios of different hadron species as a function of the transverse momentum, are important to investigate charm-quark hadronisation. Recent observations of enhanced
baryon-to-meson production yield ratios in hadronic collisions, with respect to the same measurements performed in e+e− or e±p collisions, suggest that the charm
fragmentation fractions are not universal and depend on the collision system. Moreover, measurements of charm baryons in p–Pb collisions are performed to examine possible modifications of their production due to the presence of cold nuclear matter effects. In these proceedings, the most recent results on charm hadron production in pp and p–Pb collisions obtained by the ALICE Collaboration are discussed
Cure che costringono. Costrizioni che curano. Il ruolo della coercizione nella cura per i disturbi del comportamento alimentare
Get PDFL’idea del volume collettaneo interdisciplinare nasce dall’urgenza di esaminare il ruolo della
‘coercizione’ nella cura dei disturbi del comportamento alimentare, con particolare riguardo agli
aspetti pratici ed etici. Il volume intende andare oltre un’analisi della coercizione nella sua forma
più estrema – il Trattamento Sanitario Obbligatorio per i casi gravissimi di anoressia nervosa in
cui le cure vengono rifiutate dal/la paziente – e considerare anche tutte le forme più routinarie
che la coercizione assume nelle varie fasi della malattia e del trattamento, analizzando le rispettive
complesse relazioni tra coercizione e cura. Il fine ultimo è quello di offrire uno strumento per
rendere tale relazione meno onerosa per tutti i soggetti coinvolti: pazienti, familiari e professionisti
sanitari. Diversi aspetti e gradi di coercizione caratterizzano infatti i percorsi di cura per tutti i
disturbi dell’alimentazione, al di là dei casi più estremi e persino nei casi di ricovero ‘volontario’ in
strutture residenziali. Anche in tutti questi casi, la natura stessa del disturbo alimentare fa sì che il
trattamento richieda pratiche di cura quotidiane caratterizzate da aspetti che sono vissuti dai pazienti
come coercitivi.
L’auspicio della curatrice è che l’incontro tra la biomedicina, le scienze psy, l’antropologia socioculturale,
la filosofia, la bioetica e la biogiuridica aiuti a evidenziare le complessità del rapporto tra
cura e coercizione, non solo in quei momenti in cui si configurano decisioni immediate da prendere
su questioni di vita o di morte, ma anche nelle pratiche di cura quotidiane che hanno l’obiettivo di
prevenire quelle stesse situazioni estreme. Il volume vuole quindi offrire una prospettiva inter- e
transdisciplinare, come proprio della tradizione di ricerca del Centro Interdipartimentale per l’Etica
e l’Integrità nella Ricerca del CNR
Machine learning exotic hadrons
Get PDFWe show that a neural network trained with synthetic differential intensities calculated with scattering length approximated amplitudes classifies the Pc(4312)+ signal as a virtual state located at the 4th Riemann sheet with very high certainty. This is in line with the results of other analyses but surpasses them by providing a simultaneous evaluation of probabilities of competing scenarios, like,
e.g., the interpretation as a bound state. Using the Shapley Additive Explanations we identified the energy bins which are key for the physical interpretation
The compositeness and the role of the interaction range
Get PDFA new approach is discussed on how to obtain information on
the compositeness of molecular states from combined information of the scattering length of the hadronic components, the effective range, and the binding energy,
in which the range of the interaction is considered explicitly. This approach can improve the original formula of Weinberg, which was just obtained only in the limit of very small binding and zero range interaction. An application to three different cases, deuteron, D∗s0(2317) and D∗s1(2460), has been analyzed. The results show that we can determine simultaneously the value of the compositeness within a certain range, as well as get qualitative information on the range of the interaction
Initial physics performance and status of the MPD at NICA
Get PDFThe Multi-Purpose Detector (MPD) is one of the two heavy-ion
experiments under construction at the Nuclotron-based Ion Collider fAcility (NICA) at the Joint Institute for Nuclear Research (JINR) in Dubna, which is designed to run in the collider mode. In its initial stage of operation, the MPD will study collisions of heavy ions in the energy range √sNN = 4–11 GeV, starting with Bi+Bi collisions at √sNN = 9.2 GeV. The MPD is an international collaboration consisting
of 35 institutions from 11 countries with more than 500 participants. The MPD aims to study the phase diagram of QCD matter at maximum baryonic density, to determine the onset and the nature of the phase transition between the deconfined matter and to search for the conjectured critical end point. In this document, we describe the MPD detector and its physics program, with emphasis on the first
physics measurements with beams as well as the expected performance of all the detector subsystems
Review of background study in S2-only analysis in XENON1T experiment
Get PDFThe XENON1T experiment is a direct dark matter detection ex
periment in the form of weakly interacting particles (WIMPs) scattering off nuclei. Without requiring a scintillation signal, we can set constraints on light dark matter (DM) models using only the ionization signals. This paper reviews the background study done in S2-only analysis in XENON1T experiment. We developed a strong data selection to identify three background components: low-energy β decays on the cathode wires, coherent nuclear scattering of 8B solar neutrinos (CEvNS) and electron recoil (ER) from high Q-value β decays
Per una ricostruzione dei paesaggi funerari in Etruria settentrionale: i casi di Pisa e Volterra
Get PDFThe contribution aims to illustrate the potential of digital cartography in reconstructing the funerary landscape of Pisa and Volterra. These study cases represent different scenarios, albeit within the northern-Etruscan context. While in Pisa, the visible remains are almost non-existent, and the documentation is sparse and fragmented, the available information for Volterra is more complete and accurate. The research has resulted in two different databases integrating archaeological and cartographic information within a geographic information system produced by public administration. The two freely accessible GIS platforms offer an overview of the collected data and enable filtering, querying, and analyzing records to meet specific objectives. The article concludes with a methodological note on the importance of information systems in analyzing archaeological data and the requirement to create standard protocols for collecting and disseminating geographic data
Excitons at room temperature in a two-dimensional quantum spin Hall insulator
Get PDFBoth experimental techniques and theoretical methods based on density functional theory, ab-initio GW, and Bethe-Salpeter equation calculations have been employed to investigate optical resonances in the quantum spin Hall (QSH) insulator Bismuthene (a honeycomb layer of bismuth atoms) grown on a Silicon Carbide substrate. This material exhibits a direct gap of 1.3 eV at the K and K’ points, making it an excellent candidate for studying excitons in the visible and near-infrared range, even under room temperature conditions. The results, here focused on the theoretical aspects, confirm that the strong electron-hole interaction indeed has a significant impact on the optical excitations, and provide the first evidence of excitons in a 2D QSH insulator. Two main excitonic transitions are
observed, with the lowest peak embedded in the single-particle direct gap, featuring a binding energy of ∼ 0.15 eV. Furthermore it is noteworthy that, in this material,
both excitonic and topological features stem from the same electronic structure
One year of aerosol chemical composition and source apportionment in Milan
Get PDFEuropean policy efforts to address air quality issues have led to significant reductions in pollutants over time. Despite this progress, the decrease is not homogeneous across all pollutants, as certain pollutants still exceed the thresholds set for air quality and health standards. The RI-URBANS project takes advantage of the expertise of the research infrastructures to carry out a coordinated experiment using state-of-the-art technologies in 13 European cities, where chemical composition has been studied throughout 2023. Its goal is to enhance the understanding
and management of urban air quality providing a near real-time visualization and source apportionment online tool. This paper focuses on chemical characterization and source apportionment of organic aerosols, presenting data from the measurement campaign in Milan as part of the project. Innovative measurements of non refractory aerosols using the ToF-ACSM mass spectrometer, along with black carbon
concentration measurements derived from optical techniques (AE33, 7λ), enabled continuous monitoring of various emission sources with high temporal resolution. The coordinated analysis involved Positive Matrix Factorization (PMF) and the bi linear model for black carbon source attribution application in each city, which were then compared with the project’s new tool. Results provide insight into aerosol concentrations in the urban background of Milan throughout 2023, and an initial estimation of organic aerosol sources, highlighting significant seasonal variations. Detailed analysis will be deferred in forthcoming publications
Dissipative dynamics in the cavity-mediated energy transfer process between ultrastrong coupled devices
Get PDFWe analyze the coherent energy transfer process between a quantum charger and a quantum battery mediated by a photonic cavity. The analysis is brought up in the ultrastrong coupling regime, which allows faster transfer performances compared to the limiting weak-coupling scenario. In particular, exploiting higher coupling constant and more and more photons inside the cavity leads to improved energy transfer performances. Moreover, we consider dissipative effects due to interactions with environments and we show that in the ultrastrong regime, thanks to the mediator, it is still possible to achieve great transfer performances