Tag Archives: Evento scientifico

  We present the extraction of heavy mesons fragmentation functions using a phenomenological approach. For the first time, we calculate non-perturbative fragmentation functions for B and D mesons at NNLO in the so-called zero-mass variable-flavour-number scheme in QCD. We will also incorporate the effect of charmed-meson mass corrections and determine D-meson fragmentation functions by fitting LEP and SLD data. We present NNLO single-inclusive production cross sections in electron-positron annihilation and estimate the uncertainties by means of the Hessian approach. The comparison with other calculations is discussed as well.              

For any information send an email to antonella.antonelli@lnf.infn.it paolo.branchini@roma3.infn.it vincenzo.vagnoni@bo.infn.it https://cern.zoom.us/j/63632824074?pwd=WUZ0NFpxTng0TFFyZTRrMFE1bm9aUT09

Il meeting annuale della collaborazione DUNE-ITALIA si svolgerà quest’anno presso i Laboratori Nazionali di Frascati dell’INFN e passerà in rassegna tutte le attività in cui sono coinvolti i vari istituti, sezioni e laboratori partecipanti all’esperimento DUNE.

                                                                                                 Image Credit: local_doctor/Shutterstock.com The aim of the workshop is to bring together theoreticians and experimentalists to discuss the present status of the collapse models, which were proposed as a solution of the measurement problem in quantum physics. We witnessed lot of progress recently in the studies of the collapse models. On the theoretical side new realistic dissipative and non-Markovian collapse models are being developed, in order to provide a glimpse on the physical mechanism driving the collapse. At the same time, experimentalists search for signatures of the proposed models with various and very different physical systems. Searches of anomalous heating, or of spontaneous radiation are performed in atomic, nuclear, and mesoscopic/macroscopic systems from underground laboratories to (planned) space-based experiments, together with interference-based experiments. The Hitchhiker’s Advanced Guide to Quantum Collapse Models workshop is targeted both for experts and, especially, for the young participants. It will bring together the communities working in quantum collapse with the aim to set up a synergetic effort towards progress in the field. Discussions of the impact of the collapse models in philosophy, technology and in biology, in particular the consciousness Orch OR model, will be stimulated. The workshop is organized with the support of the INFN-LNF, of the Foundational Questions Institute (Grants No. FQXi-RFP-CPW-2008 and FQXi-MGA-2102), of the John Templeton Foundation (Grant 62099) and of Comune di Frascati. The workshop will be organized if necessary in mixed modality (in presence and online) with a strong …

The Joint Eurogammas – IFIN Meeting will be held at the INFN-LNF, Aula Salvini (Bldg. 36 – ground floor), both in person and remotely. The remote connection will be provided by the Zoom platform. The Zoom link to join remotely will be sent by email to registered participants only. Participants in the Meeting are invited to register via web using the online registration form.                            ~*~ —————–~*~—————–~*~—————–~*~   Local Organizing Committee: F. Casarin, INFN-LNF M. Giabbai, INFN-LNF M. G. Iungo, Scientific Secretary, INFN-LNF

  Determining the nature of Dark Matter (DM) is among the main goals of multiple current and future experiments. An intriguing possibility is that Dark Matter arises as the massive mediator of a new force.  I will present a new class of renormalizable models consisting of a dark SU(2) gauge sector, in which a massive vector boson is the DM candidate. The dark sector is connected to the Standard Model through a Vector-Like fermion mediator, and thus does not necessarily require a Higgs portal. These models have a large number of applications with significant implications for cosmology, collider physics and flavour observables, including potential roles in the explanation of current anomalies, such as the muon g-2 or the mass of the W boson.              

The morphological method – based on the topology and singularity theory and originally developed for the analysis of the scattering experiments – was extended to be applicable for the analysis of biological data. The usefulness of the topological viewpoint was demonstrated by quantification of the changes of collagen fiber straightness in the human colon mucosa (healthy mucosa, colorectal cancer, and uninvolved mucosa far from cancer). This has been done by modeling the distribution of collagen segment angles by the polymorphic beta-distribution. Its shapes were classified according to the number and type of critical points. We found that biologically relevant shapes could be classified as shapes without any preferable orientation (i.e. shapes without local extrema), transitional forms (i.e. forms with one broad local maximum), and highly oriented forms (i.e. forms with two minima at both ends and one very narrow maximum between them). Thus, changes in the fiber organization were linked to the metamorphoses of the beta-distribution forms. The obtained classification was used to define a new, shape-aware/based, measure of the collagen straightness, which revealed a slight, and moderate increase of the straightness in mucosa samples taken 20 cm and 10 cm away from the tumor. The largest increase of collagen straightness was found in samples of cancer tissue. Samples of the healthy individuals have a uniform distribution of beta-distribution forms. We found that this distribution has the maximal information entropy. At 20 cm and 10 cm away from cancer, the transition forms redistribute into unoriented and highly oriented forms. Closer …

Changes in morphology and organization of collagen fibers contribute to the formation of a microenvironment which facilitate tumor progression through the impact on migration and polarization of the cells [1]. Changes in morphology and organization of collagen fibers in cancer, itself, are the subject of numerous studies, while it is far less known about the changes in collagen fibers in the uninvolved mucosa away from cancer The main histochemical staining for detection of collagen fibers under light micrsocpy is Masson trichrome staining. Recently, second harmonic generation (SHG) imaging of collagen fibers using nonlinear laser scanning micrscopy emerged as a poweful tool enabeling imaging of collagen fibers in unstained and unfixed tissue [2]. Due to growing interest in role of collagen fibers in cancer progression, the number of methods for quantification of different parameters of collagen fibers is increasing. Currently available methods are based on the intensity derivates, intensity variation, Fourier transform, Hough transform, directional filters and fiber tracking algorithm [3]. The aim of our study was to analyse changes in morphology and organization of collagen fibers in the uninvolved colonic mucosa 10 cm and 20 cm away from the cancer, in comparison with healthy subjects, using Masson trichrome staining, SHG imaging and multiple complementary methods for quantification.

The Forward Physics Facility (FPF) is a cavern with the space and infrastructure to support a suite of far-forward experiments at the Large Hadron Collider during the High Luminosity era. Located along the beam collision axis and shielded from the interaction point by at least 100 m of concrete and rock, the FPF will house experiments that will detect particles outside the acceptance of the existing large LHC experiments and will observe rare and exotic processes in a low-background environment. We will talk about the current status of plans for the FPF, including recent progress in civil engineering in identifying promising sites for the FPF and the experiments currently envisioned. We briefly review the physics topics that will be advanced by the FPF, including searches for long-lived particles, probes of dark matter and dark sectors, high-statistics studies of TeV neutrinos of all three flavors, aspects of perturbative and non-perturbative QCD, and high-energy astroparticle physics. And then discuss the nature of detectors that are needed for this adventure including a liquid argon TPC which will push the state of the art for such detectors.     Join Zoom Meeting https://infn-it.zoom.us/j/87005285608?pwd=MFRTNkZtelIvVXpQeTVuTlBFekxCUT09 Meeting ID: 870 0528 5608 Passcode: 735455