Tag Archives: Evento scientifico

Observations of astrophysical objects which cannot exist.

Recently astronomical data are accumulated, reporting discoveries of very early formed objects, such as supermassiveblack holes (quasars), gamma bursters, supernovae, and very bright galaxies at high redshifts. Moreover, there is an evidence to existence of starts in our Galaxy which are too old, even older than the universe. All such objects cannot be created in the frameworks of accepted scenarios of their formation. An origin of supermassive black holes observed in the centers of many (maybe all) large and some small galaxies also remains mysterious. After a review of the observations a model is presented that can explain the unusual features of the data. The model is based on a slightly modified scenario of baryogenesis motivated by supersymmetry. As a byproduct the model can predict abundant cosmological antimatter, in particular almost at hand, in the Galaxy. Though the model may be rather speculative, the observed objects present serious challenge to the theory and possibly indicate that “there is something rotten in the state of the universe”

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Precision LHC phenomenology from Resummation

Precision is the new frontier of LHC phenomenology. Accurate theoretical predictions are essential for exploiting the full potential of the machine. I will discuss the role of all-order resummations in providing high-precision predictions for a number of observables at the LHC. I will cover different resummations in QCD, such as soft resummation, collinear resummation and high-energy resummation, and discuss alternative resummation techniques. I will finally present implications of improved theoretical predictions on New Physics searches.

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FERMI – The first X-UV Ray externally seeded FEL facility

A significant progress has been made in controlling the properties of the radiation emitted by a FEL amplifier. Experiments have demonstrated both the possibility to increase the temporal coherence and to reduce the amplifier length to reach saturation, by seeding it with an external source. The FERMI seeded Free Electron Laser (FEL) is based on two complementary FEL lines, FEL-1 and FEL-2. FEL-1 is a single stage cascaded FEL delivering light in the 65-20nm wavelength range, while FEL-2 is a double stage cascaded FEL where the additional stage extends the frequency up-conversion to the spectral range of 20-4nm. The main aspects and results achieved with these two beam lines will be briefly reviewed, together with the future possibilities opened by the increased control on the FEL process allowed by the interaction with the external seed.

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EDIT 2015

Excellence in Detectors and Instrumentation Technologies

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Workshop on Muon Identification at LHCb

The workshop on Muon Identification at LHCb will be held at the Frascati National Laboratory of INFN, in the B. Touschek Auditorium. The meeting will focus on the ongoing developments for maximising the performances on the Muon Identification, in the present phase and for LHCb upgrade. The goal is to gather consolidated experiences and new ideas from  detector, trigger and software experts and to create a forum of discussion where to address the main challenges and the best solutions for the future. The agenda and the link to Vidyo are here

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The Cosmic Zoo: (sterile) neutrinos, axions and majorons after Planck

The nature of dark matter (DM) is one of the most puzzling open problems of cosmology and particle physics. Succesfull structure formation requires the thermal velocity of the DM particles to be small, i.e., the DM to be “cold” or “warm”, albeit a subdominant “hot” component could be present. Several candidates for the role of dark matter have been proposed: among them sterile neutrinos, axions (and axion-like particles) and majorons. These candidates could costitute the dominant cold/warm DM or provide a small hot component, in different regions of the respective parameter spaces. In my talk I will review present constraints on these candidates, also in light of the recent observations of the Planck satellite.

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Nanoscience and Nanotechnology

The conference in 2015 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.

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Adjoint $SU(5)$ GUT model with $T_{7}$ flavor symmetry

We propose an adjoint $SU(5)$ GUT model with a $T_{7}$ family symmetry and an extra $Z_{2}\otimes Z_{2}^{\prime} \otimes Z_{3}\otimes Z_{4}\otimes Z_{12}$ discrete group, that successfully describes the prevailing Standard Model (SM) fermion mass and mixing pattern. The observed hierarchy of the charged fermion masses and the quark mixing angles arises from the $Z_{3}\otimes Z_{4}\otimes Z_{12}$ symmetry breaking, which occurs near to the GUT scale. The light active neutrino masses are generated by type I and type III seesaw mechanisms mediated by the fermionic $SU(5)$ singlet and the adjoint $\mathbf{24}$-plet. We construct several benchmark scenarios, which lead to $SU(5)$ gauge coupling unification and are compatible with the known phenomenological constraints originating from the lightness of neutrinos, proton decay, dark matter, etc. These scenarios contain TEV scale colored fields, which could give rise to a visible signal or be stringently constrained at the LHC.

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