Tag Archives: Evento scientifico

In the last two decades, the crucial role played by the high brightness electron beams in the frontier fields of radiation generation and advanced acceleration schemes has been largely established. The design and optimisation of high brightness RF linacs has shown to be essential for the coherent X-rays generation in the FELs as well for the realization of bright Inverse Scattering Compton (ICS) sources, depending the FELs on the electron beam peak brightness and the ICS sources on the electron beam maximum phase space density. These features for the electron beam are achieved thanks to a hybrid scheme consisting in an RF photo-injector followed by booster sections. At the INFN-LNF in Frascati both the ELI-NP Inverse Compton Scattering source, in its installation phase in Magurele (Romenia), and the EuPRAXIA@SPARC_LAB FEL facility are under study. The guidelines to design RF linac able to drive these sources and electron beam dynamics studies for these two machines are here presented.

The new Gamma Beam System (GBS) of the ELI-NP project, currently under installation in Magurele (RO) by INFN, as part of EuroGammaS consortium, can provide tunable gamma rays, with narrow bandwidth (0.3%) and a high spectral density (104 photons/sec/eV) by the Compton backscattering effect. A turn-key high level software has been designed to fully characterise the 6D beam phase space and the trajectory in order to help operator during commissioning with an easily scalable suite for any high brightness LINAC. Currently the high level software, interfaced with EPICS control system, manages automatically accelerator devices to allow electron beam diagnostic measurements (emittance, energy, spread, length, longitudinal profile). Next developments for preserving the beam quality of well-aligned bunch trains will include beam based alignment and dispersion free steering software.

                                                                                                                       Picture taken by Roy J. Glauber and published in nobel prize.org                                 This conference is organized in the framework of the John Templeton Foundation financed project: "Hunt for the "impossible atoms": the quest for a tiny violation of the Pauli Exclusion Principle. Implications for physics, cosmology and philosophy", being the concluding event, and is supported by the Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Roma and by INFN. The main aim of the conference is to discuss the theoretical, philosophical and experimental aspects of the spin-statistics connection and its possible violation & related items (CPT and Lorentz symmetry violation; cosmological implications; identity versus indistinguishable etc.). Expert scientists and philosophers will give lectures on spin-statistics and spin-statistics violation  and on theories beyond the "standard" quantum mechanics, with an overview of hottest topics in these sectors.   Organizers: Catalina Curceanu, LNF-INFN (Chair) Johann Marton, SMI-Vienna (Austria) Edoardo Milotti, Univ. and INFN Trieste (Italy) Kristian Piscicchia, Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Roma (Italy) Alessandro Scordo, LNF-INFN (Italy)    

The sub-GeV mass region of the dark matter is foreseeably to be explored intensively in the next generation of direct detection experiments. Essig and others recently discussed the feasibility of detecting the dark-matter electron recoil using low-noise semiconductor detectors as the active target. With a readout noise level below one electron RMS, the sensitivity allows us to test several theoretical models that account for dark matters with sub-GeV mass. One of the two silicon-based architectures that are capable of reaching such noise level is the DEPFET with Repetitive Non Destructive Readout (RNDR). The prototype of this detector has been developed by the Semiconductor Laboratory of the Max Planck Society, and the readout of a single pixel has successfully reached the expected sub-electron noise level . In this presentation, we will introduce the working concept of the DEPFET-RNDR. Then we will present the new project of DANAE under preparation that plans to apply this type of detector to the direct detection of dark-matter electron recoil.

Several aspects of flavour physics, including the recent experimental “anomalies” in leptonic decays, are critically reviewed. New ideas to improve the accuracy of the theoretical predictions and future developments are discussed.

After reviewing the status of the recent experimental discrepancies in B-physics data, I show how these phenomena can be coherently explained by an extended gauge dynamics which closely mimics the structure of the standard model. A key role is played by a generalisation of the Cabibbo mixing which allows for sizeable effects in charged current quark-lepton transitions, while sufficiently suppressing quark-quark and lepton-lepton FCNC. The model is also consistent with direct searches at high-pT and provides a fully calculable framework to guide the early phase of the B-anomalies and predict correlations with new observables.

I will present an update about the present status of the various anomalies observed in B physics.

The BTF of the DAΦNE accelerator complex, in the Frascati National Laboratory of the INFN, is in operation since 2004 with an average of 200 beam-days and 25 groups/year. The doubling of the beam-line will allow increasing the access capability, as well as hosting long-term experiments in parallel with the test-beam activities. The activities ongoing for the upgrade of the facility are described.

Aim of the meeting: This informal meeting is intended for extensive discussions on phenomenological issues of mutual interest  between the participants: mainly flavor physics, but also axion phenomenology and dark sectors. A certain number of more formal seminars will be open to the general audience. On Wednesday 27/6, 2:30pm in “Aula Salvini” Prof. G. Martinelli (U. La Sapienza) will deliver the General Seminar: “Flavor Physics for Non-Experts: (a Theory) Overview”.  Speakers: Tuesday 26/6, 2.30pm:  Giuliano Panico (IFAE Barcellona) “Flavor and Compositeness”  Wednesday 27/6, 10:00am:  Federico Mescia (Barcellona Univ.) “Present status of B anomalies”  Wednesday 27/6, 11:00am:  Luca Di Luzio (Durham Univ.) “From 321 to 4321: a Cabibbo mechanism for leptoquarks”                                   GENERAL SEMINAR Wednesday June 27, 2:30pm Guido Martinelli (Università di Roma `La Sapienza’) “Flavor Physics for Non-Experts: (a Theory) Overview”  Several aspects of flavour physics, including the recent experimental “anomalies” in leptonic decays, are critically reviewed. New ideas to improve the accuracy of the theoretical predictions and future developments are discussed.