iten
Home » Evento (page 29)

Tag Archives: Evento scientifico

Pseudo-observables in Higgs Physics

In view of future high-statistics data, it is useful to define a framework for precise determinations of the properties of the Higgs particle valid in generic extensions of the Standard Model. As I will discuss, this goal can be achieved with a limited set of so-called “Pseudo-Observables” (PO). The PO provides a systematic generalization of the “kappa-framework” so far adopted by the LHC experiments and provide a useful bridge between data and theory predictions. I discuss how the PO are defined and how they can be used to test various dynamical and symmetry hypotheses about the Higgs sector. The relation between PO and EFT couplings is also briefly discussed.

Scopri di più »

Low scale leptonic unitarity violation in neutrino oscillation phenomena

In this talk, I will discuss leptonic unitarity violation at energy scale much lower than the electroweak scale in neutrino oscillation phenomena. The main features which distinguish it from high scale unitarity violation are preservation of lepton flavor universality and absence of zero-distance neutrino flavor transition. For concreteness, we work in the framework of 3 active plus N sterile neutrino model and restrict the active-sterile and sterile-sterile neutrino mass squared differences to be in between 0.1 eV^2 and 1 MeV^2. The upper bound is such that the sterile states are kinematically allowed to participate in neutrino oscillation while the lower bound is such that our model becomes insensitive to details of the sterile sectors (mass spectra and mixing) due to partial decoherence effects.

Scopri di più »

Development of CdZnTe X- and gamma-ray detectors for security, environmental monitoring, and medical applications.

CdZnTe-based X- and gamma-ray detectors operate at room temperature, in a wide energy range (10keV- 1MeV), and show good energy resolution. Thanks to these unique characteristics, they have found applications in may fields, such as security, environmental monitoring, medical diagnostics. In the last years, IMEM-CNR developed technology to growth CdZnTe crystals and realize CdZnTe-based X- and gamma-ray detectors. In this talk, the main results will be summarized concerning the following projects: realization of an unmanned aerial vehicle (UAV) equipped with a CdZnTe-based gamma ray spectrometer for the localization and identification of nuclear sources dispersed in the environment (funded by the Flagship Fabbrica del Futuro) development of instrumentation for high flux x-ray spectroscopy (funded by “Futuro in Ricerca”) realization of a gamma-ray detector for in situ monitoring of the 470 keV dis-excitation photons during BNCT development of high density pixel detectors for x-ray imaging (funded by private contracts).

Scopri di più »

ACSIN 2016

The 13th Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures ACSIN 2016 (called also ACSIN-2016 ACSIN-13) The year 2016 will mark the 27th anniversary of the ACSIN series and it will happen in Rome at the Bruno Touschek Congress Center of Laboratori Nazionali di Frascati – Istituto Nazionale di Fisica Nucleare. The first International Symposium on Atomically Controlled Surfaces and Interfaces was held in 1991 – Tokyo, supported by the Thin Film and Surface Physics Division in The Japan Society of Applied Physics in commemoration of its 20th anniversary. Bearing in mind the developments in nanoscience and nanotechnology, the word “Nanostructures” has been added to the name of the conference since the fifth International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-5) was held in Aix-en Provence in 1999. Following the successful series of ACSIN conferences in Tokyo (ACSIN-9, 2007), Granada (ACSIN-10, 2009), Saint Petersburg (ACSIN-11, 2011), and Tsukuba (ACSIN-12, 2013).

Scopri di più »

Phase I commissioning of the SuperKEKB rings

The Super-B-Factory SuperKEKB at KEK, Japan, aiming at a luminosity of 8×1035 cm-2 s-1, is a state-of-the-art upgrade of the highly successful KEKB accelerators, which holds the peak and integrated luminosity records worldwide. The Phase 1 commissioning of the SuperKEKB rings without final focus system and Belle II detector started in February, and continued for 5 months until the end of June 2016. The main tasks of Phase 1 were to fine-tune the rings to achieve low emittances and to make it ready for future commissioning with detector. The commissioning has been carried out smoothly and according to the planned schedule as a result of effective cooperation in the SuperKEKB team. This talk reports on the experiences of commissioning, concerning mainly low emittance tuning and observations on collective effects at high beam currents, and a review of the Phase 2 and 3 status and plans.

Scopri di più »

Nanoscience and Nanotechnology

The Nanotechnology group at INFN – LNF organizes since 2000 a series of international meetings in the area of nanotechnology. The Nanotechnology group at INFN – LNF organizes since 2000 a series of international meetings in the area of nanotechnology. The conference in 2016 is devoted to recent developments in nanoscience and its manifold technological applications. It consists of a number of tutorial/keynote lectures, as well as research talks presenting frontier nanoscience research developments and innovative nanotechnologies in the areas of biology, medicine, aerospace, optoelectronics, energy, materials and characterizations, low-dimensional nanostructures and devices. We plan to submit selected papers, based on conference talks and related discussions, for publication on a dedicated issue of a peer reviewed international journal we are . There will be Invited Lecturers and selected talks from the call for papers below, as well as a poster session. CALL FOR CONTRIBUTIONS Authors wishing to submit their work for presentation at the conference can send an abstract as a doc file (max 2 pages, including figures) to bellucci@lnf.infn.it (or federico.micciulla@lnf.infn.it antonino.cataldo@lnf.infn.it) by 31st July 2016, specifying whether it is meant for oral or poster presentation. Authors will be notified of the acceptance of their submission by 1st September 2016. POSTER SESSION We wish inform authors that a BEST POSTER PRICE will be won, provide by a sponsor of conference. Additional detailed information can be found in the web site: https://agenda.infn.it/conferenceDisplay.py?ovw=True&confId=11337, or by e-mailing: bellucci@lnf.infn.it federico.micciulla@lnf.infn.it antonino.cataldo@lnf.infn.it silvia.bistarelli@lnf.infn.it Registration – There is no fee for attendance, however registration is ...

Scopri di più »

Extended Higgs Sector in Supersymmetry

We investigate an extension of the MSSM containing a SU(2) Higgs triplet of zero hypercharge and a gauge singlet. We show that in this model the allowed data for the Higgs boson interaction eigenstates tend to group into separate blocks for SU(2) triplet, doublet and singlet. The triplet sector has two degenerate paired states, each pair composed of a mostly-triplet charged Higgs and a mostly-triplet scalar or pseudoscalar state. The mostly-doublet sector involves instead a SM-like Higgs of 125 GeV and extra mass-degenerate states, composed of a charged, a scalar and a pseudoscalar state. We analyze the exotic decay of the SM-like Higgs into two light (hidden) pseudoscalars, as well as decays into final states containing taus, muons and bottom quarks, and explore the parameter space at the LHC. We also investigate the phenomenology of triplet-Like charged Higgs-boson pairs, decaying into multilepton final states, in different phases of energy and luminosity of the LHC.

Scopri di più »

Lower bounds for the energy density in quantum integrable models

The energy density is classically positive, a property that fails to be true in quantum theory. However, if it were indefinitely negative, it might produce macroscopic violations of the second law of Thermodynamics or allow the existence of exotic spacetimes configurations (such as wormholes, time machines and warp drives). Fortunately, lower bounds exist and have been proved for linear fields (free quantum field theory), with few results for interacting models of QFT. In a class of quantum integrable models, on the level of one-particle states, we prove the existence of lower bounds for local averages of the energy density, establishing a first result for QFTs with interaction.

Scopri di più »