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Nuclear equation of state from nuclear collective excited state properties
Get PDFAn overview on some selected investigations of the excitation energy and sum rules in Giant Resonances and its impact on the nuclear equation of state around saturation density is presented
New particle identification system for MAGNEX: The ΔE SiC stage
Get PDFIn the view of the NUMEN experiments with high beam intensity, the MAGNEX magnetic spectrometer focal plane detector will be equipped with a new particle identification system based on telescopes. The new energy-loss stage of it consists on large area silicon carbide detectors. The devices and first characterisation tests are presented
Risorse e servizi per la rigenerazione dei territori a bassa densità: gli esiti di un confronto interdisciplinare
Get PDFIl volume è dedicato al tema delle “Risorse e servizi per la rigenerazione dei territori a bassa densità” e raccoglie gli esiti di un confronto interdisciplinare su un tema centrale nel dibattito istituzionale e scientifico: la vita in aree marginalizzate, siano esse frange di città metropolitane, aree interne o insediamenti “in between” rispetto alle traiettorie di sviluppo e alle polarizzazioni urbane. Marginalità spaziale, sociale, economica e culturale formano oggetto di una riflessione corale sviluppata da un gruppo multidisciplinare di ricercatori che si interrogano sulle concause che hanno reso marginali alcune formazioni insediative e sulle traiettorie di policy design place-based e place-sensitive, in grado di rigenerare risorse endogene e riequilibrare relazioni tra territori periferici e centrali.
Particolare attenzione è rivolta al tema dell’accessibilità alle risorse e ai servizi quale driver di sviluppo e riequilibrio territoriale
Study of central exclusive production processes by proton-proton collisions at s√=13 TeV with the CMS experiment
Get PDFIn this paper the reader is introduced to the physics of central
exclusive production (CEP) processes. Furthermore, an overview of many CEP
processes studied with the CMS experiment during Run2 will be given, including
tt- , e-e+, u-u+ and TT central exclusive production
DarkSide-20k: Direct Dark Matter search
Get PDFDarkSide-20k, currently under construction at INFN, Laboratori Nazionali del Gran Sasso, is a direct detection Dark Matter experiment; it aims to directly detect WIMP Dark Matter particles scattering with liquid Argon nuclei in a 20 t fiducial volume dual-phase Time Projection Chamber (TPC), exploiting the subsequent scintillation signal and specific cryogenic photodetectors to detect it. The experiment is expected to obtain a sensitivity to WIMP-nucleon cross section of 7.4 × 10−48 cm2 for the 90% C.L. exclusion considering 1 TeV/c2 mass WIMPs over a 200 t yr exposure, while maintaining an instrumental background level in the
WIMP search region lower than 0.1 events for the whole exposure. To achieve that result, an innovative Gadolinium-doped veto system mechanically integrated with the TPC itself is exploited, useful to identify neutron interactions in the detector
Search for supersymmetric higgsinos in compressed mass scenarios using soft displaced tracks with the ATLAS Detector
Get PDFProgress of a novel search for the direct electroweak production of supersymmetric higgsinos with very compressed mass spectra in final states with large missing transverse energy and soft displaced tracks is reported. Exploiting
such a topology aims to bridge the existing sensitivity gap where the mass splitting is too large to produce a disappearing track signature and too small for efficient
lepton reconstruction. The search uses pp collision data recorded by the ATLAS Detector during the Run-2 of the LHC (2015–2018), corresponding to a total integrated luminosity of 140 fb−1 at a center-of-mass energy of √s =13TeV
An update view on the X17 hypothesis
Get PDFIn view of the latest experimental results recently released by the ATOMKI collaboration, we critically re-examine the possible theoretical interpretation of the observed anomalies in terms of a new BSM boson X with mass ∼ 17 MeV. To this end we employ a multipole expansion method and give an estimate for the range of values of the nucleon couplings to the new light state in order to match the experimental observations. Our conclusions identify the axial vector state as the most promising candidate, while other spin/parity assignments seems disfavored for a combined explanation
Amplitude analysis of vector-pseudoscalar final states at GlueX
Get PDFExcited vector mesons, some of which are predicted to include gluonic excitation in their wave functions, and certain classes of axial vector mesons, some of which are implicated in the decay of spin-exotic mesons, decay dominantly to vector-pseudoscalar final states. In particular, the axial vector b1(1235) decays dominantly to ωπ, and is produced copiously at the GlueX experiment. It provides a testing ground to explore strategies for amplitude analysis of further vectorpseudoscalar channels where the intermediate resonances may be harder to isolate.
The formalism for amplitude analysis of b−1 production via charge exchange with a recoiling Δ++ is presented here, and compared with the proton recoil case. A strategy for a systematic analysis of reactions involving Δ++ recoil is outlined
Quark mass dependence of Ds0∗(2317) and states
Get PDFWe study the light and heavy quark mass dependence of the low-lying charmed mesons in the framework of one-loop HHχ PT. The low-energy constants are determined by analyzing the available lattice data from different LQCD simulations. Model selection tools are implemented to determine the relevant parameters as required by data with a higher precision. We analyze the HSC energy levels for DK scattering in I = 0 for different boosts and two pion masses and perform a global fit with these levels in addition to DK and D∗K scattering energy levels from RQCD and Prelovsek et al. Finally we extract the pion mass dependence of D∗
s0(2317) and Ds1(2460) resonances
Charm meson and charm-meson molecule in an expanding hadron gas
Get PDFWe present our studies on the evolution of charm mesons after the kinetic freeze-out of the expanding hadron gas produced in a heavy-ion collision and the thermal correction to a loosely bound charm-meson molecule in a pion gas. The πD∗ → πD∗ reaction rates have t-channel singularities that give contributions inversely proportional to the thermal width of the D. The ratio of the D0 and D+ production rate can differ significantly from those predicted using the measured D∗ branching fractions. The thermal correction to a loosely bound charm-meson molecule in a pion gas comes primarily from the complex thermal energy shift of the charm-meson constituents