Tag Archives: Evento scientifico

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).

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.

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 …

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.

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.

High resolution gamma-ray spectrometry is a nuclear analytical technique widely used for a determination of radionuclides in wide range of their activities in various kind of samples, from nuclear waste samples to the environmental samples and foodstuffs. For the quantitative determination this technique requires a determination of a detector efficiency with a high accuracy. In the Laboratory for radioecology of the Ruder Boskovic Institute in Zagreb, we are using Canberra’s high purity germanium detectors for this type of measurements. As the detector efficiency depends on an energy of emitted gamma rays, physical properties of materials and a sample geometry, calibration standards with same characteristics should be used for the efficiency calibration. However due to a large variety of the materials that have to be analysed, it is hard to obtain standard materials of the same characteristics. Therefore, the possibility to determine the detection efficiency in a mathematical way by detector and sample setup modeling can significantly facilitate the procedure. The description of detector and its peformances, together with the comparison of accuracy and precision of the radionuclide determination by using mathematical calibrations and classically source-based ones in the measurements of specific environmental samples will be presented. As Canberra has developed Laboratory SOurceless Calibration Software (LabSOCS) for this aim, spectrometry setup, consisting of the Canberra broad energy germanium detector (BEGe) with the original lead shielding and Genie 2000, LabSOCS/ISOCS softwares are used for the quantitative determination of low-level activities in few specific matrices such as honey samples and borosilicate filters. Honey …

We present an approach to computing probabilities in quantum field theory for a wide class of source-detector models. The approach works directly with probabilities and not with squared matrix elements, and the resulting probabilities can be written in terms of expectation values of nested commutators and anticommutators. We present results that help in the evaluation of these, including an expression for the vacuum expectation values of general nestings of commutators and anticommutators in scalar field theory. This approach allows one to see clearly how faster-than-light signalling is prevented, because it leads to a diagrammatic expansion in which the retarded propagator plays a prominent role. We illustrate the formalism using the simple case of the much-studied Fermi two-atom problem.

The Silicon Tracking System (STS) is the main tracking detector of the upcoming fixed-target Compressed Baryonic Matter (CBM) experiment which aims to explore the phase diagram of the strongly interacting matter in a region of high net baryonic densities and moderate temperatures. The STS will be used for the reconstruction of tracks of charged particles and determination of their momenta. The system comprises 8 tracking stations located 30 cm downstream of the target. It will be mounted with approximately 1200 double-sided silicon microstrip sensors in three different sizes. A high level of radiation damage is expected to impact on the sensors. The maximum exposure of 1× 1014 in 1 MeV neutron equivalent will be reached after several years of running depending on the physics program. The Quality Assurance (QA) procedures for the STS sensors will be overviewed highlighting the automated QA testing procedure for a single strip defect identification. In addition to this, the radiation tolerance studies performed on STS sensor prototypes will be presented.

I will explain how traditional parton showers, as implemented in the major general purpose monte carlo codes, are fundamentally limited in their accuracy and how that situation can be improved via a new amplitude-level algorithm that includes, amongst other things, Coulomb gluon exchanges between incoming and outgoing partons. Coulomb gluons are responsible for the breaking of soft-collinear factorization and they are what generates the underlying event and diffraction.

In this talk I will show how the general framework of effective quantum gravity proposed by Brunetti, Fredenhagen and myself can be used to study problems in quantum cosmology. This formulation allows to derive some known results in (first order) cosmological perturbation theory from first principles and it provides a robust tool for computing higher order corrections. Conceptually, it works as a test ground for new ideas concerning construction of gauge invariant observables in effective quantum gravity. The non-local character of these observables leads to new interesting combinatorial structures arising in renormalization.