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The ubiquitous top quark

The top quark plays a central role in many LHC analyses that test the Standard Model and that search for new physics. I will review why this is so, and discuss in particular recent advances in how to describe the top quark production and decay processes precisely, including the spin of the top quark, and with possible new physics influences. Recent experimental results and theoretical advances will be reviewed, and an outlook given.

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Selected puzzles in particle physics

Aim of the workshop: In spite of its consolidated experimental success, the standard model of particle physics falls short of describing all observed phenomena. For instance, the cosmological matter/antimatter asymmetry, dark matter, neutrino masses, all require some extension of the standard model. Well motivated theoretical considerations also support the expectation that physics beyond the standard model should sooner or later show up. Presently, it is far from clear which directions should be taken to extend the theory, and while the high energy frontiers keep being explored at the LHC, it is important to maintain under attentive scrutiny any discrepancy between theory predictions and experimental results. In this 3-day workshop we plan to review the status of a few particle physics puzzles of different typologies: long-standing unresolved issues awaiting for further experimental clarification (muon g-2, neutrino physics anomalies), recent hints of anomalies in specific measurements where signals of new physics might preferentially show up (bottom and top physics), and discrepancies particularly robust, which cannot be ascribed to statistical fluctuations (internal e+e- production in 8Be nuclear transitions, proton charge radius). We plan to have only two or three talks each day, and plenty of time to jointly reanalyse the status of the various issues, confront and discuss strategies and ideas. The general approach and format of the talks (on invitation only) will be pedagogical, and should favor extended interaction among participants. Scientific Program and Speakers:  Javier Virto  (Bern) "Flavor anomalies in B physics" Andrea Giammanco (Louvain, CP3) "Who ordered that? Investigations of the ...

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Training school for graduating students, PhD students and young researchers. Are spin-statistics connection and quantum theory exact? The endeavor for the theory beyond the standard quantum mechanics. FQT2016

Pauli and Bohr watch a spinning top. Photograph by Erik Gustafson, courtesy of AIP Emilio Segrè Visual Archives, Margrethe Bohr Collection This training school 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” and is sponsored by the Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Roma and by INFN. The main aim of the school is to train the young generation in hot issues of modern physics, such as the theoretical, philosophical and experimental aspects of the spin-statistics connection & quantum mechanics tests. 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. Experiments testing spin-statistics (as VIP) and quantum mechanics and related philosophical issues will be introduced. Young female students and researchers are strongly encouraged to participate. Assessment of knowledge before and after the event will be realised (questionnaire).   Organizers Angelo Bassi, Univ. and INFN Trieste, Italy Catalina Curceanu, LNF-INFN, Italy Johann Marton, SMI-Vienna, Austria Matteo Morganti, Univ. Roma Tre, Italy  

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The window for preferred axion models

A major goal of axion searches is to reach inside the parameter space region of realistic axion models. Currently, the boundaries of this region depend on somewhat arbitrary criteria, and it would be desirable to specify them in terms of precise phenomenological requirements. I will start with a brief description of the strong CP problem, of the Peccei-Quinn solution predicting the existence of the axion, and of axions as cold Dark Matter. I will then consider the hadronic axion models which involve new heavy quarks Q. By requiring that i) the Q are sufficiently short lived to avoid issues with long lived strongly interacting relics, ii) no Landau poles are induced below the Planck scale, fifteen cases are selected, which define a phenomenologically preferred axion window.

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Low secondary emission surfaces for multipactor suppression in space

Multipactor is an undesirable effect produced when high power RF electric fields are used in vacuum. In space, this effect is very important since affects the wave-guides for communications limiting the power of the transmissions. Any electron present near the electric field is accelerated impinging the wave-guide walls and producing more electrons by secondary emission which are also accelerated. The final result is an electron cloud which can even destroy the wave-guide. In this talk I will first present the main characteristics of the multipactor effect in space, its relation with secondary emission and how this effect could be mitigated. Then I will present a brief summary of the late anti-multipactor coatings developed in our laboratory during the last years in cooperation with the ESA. Since the problem is still far away from being solved, I will present new ideas for antimultipactor coatings to be developed under an European ERA.Net Project.

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Signatures from simple scalar WIMP candidates

Scalar WIMP are somewhat less popular than their fermionic counterparts. Yet, they have specific and interesting phenomenology and are rather well-motivated, at least from a bottom-up perspective to the dark matter particle problem. In this talk, after a personal perspective on some dark matter model building aspects, I will discuss in details the phenomenology of some very simple scalar WIMP candidates (i.e. the scalar 7-plet minimal dark matter candidate and a real scalar through the so-called vector-like portal), with a focus on their possible indirect detection through searches for gamma-ray spectral features

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