Tag Archives: Evento scientifico

The aim of the “Exploring the Quantum Boundaries: an Odyssey into the gravity related collapse models” is to bring together theorists and experimentalists working in the field of quantum collapse models, in particular (but not limited to) gravity-related collapse, proposed as solution to the measurement problem in quantum physics, to discuss the present status of these models, both from theoretical and experimental points of view.On the theoretical side dissipative and non-Markovian collapse models are being developed and the interplay between gravity and collapse explored; at the same time, experimentalists search for signatures of the proposed models with various and very different physical systems. A discussion about the future in this field will be put forward involving experts and young researchers working in the field.The Workshop is organized with the support of the INFN-LNF, and of the John Templeton Foundation being the closing event for the QUBO JTF financed project (Grant 62099).Image Credit: Michal Bednarski for Quanta MagazineChairs:Catalina Curceanu, INFN-LNF, Frascati, ItalyLajos Diósi, Wigner Research Center for Physics and Eötvös Loránd University in Budapest, HungaryKristian Piscicchia, CREF, Rome, and INFN-LNF, Frascati, Italy Local Organizers:Simone Manti, INFN-LNF, Frascati, ItalyFabrizio Napolitano, INFN-LNF, Frascati, ItalyDiana Sirghi, CREF, Rome, and INFN-LNF, Frascati, ItalyFrancesco Sgaramella, INFN-LNF, Frascati, Italy Secretary:Alessandra Tamborrino Orsini, INFN-LNF, Frascati, Italy .     

Speaker: Alexander Lind (CNRS & Subatech Nantes) I will present recent work on an NLO study of the process pp -> ttbar in the 1-Higgs-singlet extension of the S with an additional heavy Higgs boson that mixes with the light Higgs boson.. This process is subject to large interference effects between loop-induced Higgs-mediated amplitudes and QCD continuum background. A reliable modelling of the resulting top-pair invariant-mass shapes requires the inclusion of higher-order QCD corrections. The computation of NLO corrections is exact in all contributions but in the class of non-factorisable two-loop diagrams, included in an approximate way which preserves all infrared singular limits. We present numerical results for several benchmark points with masses in the range 700-3000 GeV considering the production of stable top quarks. We find that the interference dominates the BSM signal yielding sharp dip structures instead of resonance peaks. The significance and excludability of the BSM effect is explored for the LHC Run 2, Run 3 and HL-LHC.

The Nanoscience & Nanotechnology Conference will be held in the Bruno Touschek Auditorium (Bldg. 36, access from LNF secondary entrance in Via E. Fermi, 60 – see map).The NEXT Nanotechnology group at INFN – LNF organizes since 2000 a series of International meetings in the area of nanotechnology. The conference in 2024 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. The event is co-sponsored by INFN and by Qi S.r.l., Via Monte d’Oro, 2/A, 00071 Pomezia-Roma, Italy, info@qitech.itWe plan to submit selected papers, based on conference talks and related discussions, for publication on a dedicated issue of a MDPI journal (Materials, IF=3,4), whose Chief Editor of the section “Carbon Materials” is Stefano Bellucci, https://www.mdpi.com/journal/materials/sectioneditors/carbonThere will be Invited Lecturers and selected talks from the call for papers below, as well as a poster session.CALL FOR CONTRIBUTIONSAuthors wishing to submit their work for presentation at the conference can send an abstract as a doc or pdf file (max. 3 pages) to bellucci@lnf.infn.it by 15th May 2024, specifying whether it is meant for oral or poster presentation. Authors will be notified of the acceptance of their submission.REGISTRATIONThere is no fee for attendance, however registration is mandatory and must be submitted by 21st May 2024.HOTEL ACCOMMODATIONHotel reservation is the responsibility of the participants. Additional information can …

Information about the Higgs potential from the self-couplings of the detected Higgs boson is crucial for a better understanding of the mechanism of electroweak symmetry breaking and of the electroweak phase transition in the early Universe. The latter is of particular importance in the quest for explaining the observed asymmetry between matter and anti-matter in the Universe. It will be shown that although the present bounds on the trilinear Higgs self-coupling from Higgs pair production at the LHC are still relatively weak, they already provide a new way for probing so far unconstrained parameter regions of extended Higgs sectors. The parameter region of extended Higgs sectors giving rise to a strong first-order electroweak phase transition in the early Universe and potentially detectable gravitational wave signals is typically correlated with a certain mass splitting among the additional Higgs bosons, giving rise both to to a significant enhancement of the trilinear Higgs-boson self-coupling compared to the SM value and to a characteristic “smoking gun’’ signature in the search for additional Higgs boson. The prospects for exploiting the process of triple Higgs-boson production at the LHC for constraining both the trilinear and quartic Higgs boson self-couplings are briefly discussed. Join Zoom Meetinghttps://infn-it.zoom.us/j/96342145853?pwd=NzlkbUhPOTR4MmVFTXQ4dDhDK09lQT09Meeting ID: 963 4214 5853Passcode: 667657 

The 16th workshop on Shielding aspects of Accelerators, Targets and Irradiation Facilities (SATIF-16) will take place on May 28-31, 2024 at the National Laboratories of Frascati of the Italian National Institute for Nuclear Physics.The SATIF workshop aim is to promote information exchange among experts in the fields of radiation physics and the application of ionizing radiations in different fields of science and technology. This series workshops are experts’ meetings addressing important aspects related to the modeling and design of accelerator shielding, including updates on new and emerging features of the computation tools including FLUKA, MARS, and PHITS, high resolution radiological assessments for large scale areas with automated run-time optimization for the simulation of deep penetration of radiation in shielding structures, machine learning driven design optimizations, and comprehensive benchmarking exercises. Main objectives of SATIF meetings are:promoting the information exchange among experts in the field of accelerator shielding and related topics;identifying areas where international cooperation can be fruitful;creating task forces in order to achieve progress in specific priority areas. SATIF workshops have been held once every two years since 1994, rotating between the US, Europe, and Asia. In addition to organizing these workshops the SATIF group also coordinates analysis and proposes action items.Following the SATIF tradition, there is no registration fee for this event.   A Zoom link will be provided for remote attendance of the workshop as a spectator only. The presentation of talks and posters will be reserved for in-person participation (special requests due to unexpected events will be reviewed by the Local Organizing Committee …

SciCom

Our leading model of the universe is known as Lambda CDM. It includes both a weakly interacting type of matter (cold dark matter, or CDM) and dark energy (Lambda). Both matter and dark energy shape how the universe expands – but in opposing ways. Matter and dark matter slow the expansion down, while dark energy speeds it up. The amount of each influences how our universe evolves. This model does a good job of describing results from previous experiments and how the universe looks throughout time.But, with just its first year of data, Dark Energy Spectroscopic Instrument (DESI) has been able to analyze the expansion history of the young universe with over 99% accuracy. The data from DESI has provided unprecedented measurements of the expanding universe, offering new insights into dark energy.  When results are combined with data from other studies, there are some subtle differences with what Lambda CDM would predict. There are some hints pointing at small temporal variations in the density of dark energy. As DESI gathers more information during its five-year survey, these early results will become more precise, shedding light on whether the data are pointing to different explanations for the results we observe or the need to update our model. 

Significant hints for new Higgses with masses around 95GeV and 152GeV have been accumulated. In this talk, I will discuss the relevant measurements as well as possible models which can explain these excesses. Furthermore, I show how the new Scalars could explain the deviations between the theory predictions and the measurements of differential top quark distributions.

A dynamical mechanism, based on a confining non-abelian dark symmetry, which generates Majorana masses for sterile fermions, is proposed. We apply it to the inverse seesaw scenario, which allows us to generate light neutrino masses from the interplay of TeV-scale Pseudo-Dirac mass terms and a small explicit breaking of lepton number. A single generation of vector-like dark quarks, transforming under a  SU(3) gauge symmetry, is coupled to a real singlet scalar, which serves as a portal between the dark quark condensate and three generations of heavy sterile neutrinos. In this framework the lightest dark baryon, which has spin  3/2 and is stabilized at the renormalizable level by an accidental dark baryon number symmetry, can account for the observed relic density via thermal freeze-out from annihilations into the lightest dark mesons.This model may be probed by next generation neutrino telescopes via neutrino lines produced from dark matter annihilations.

Dark matter implies that SM extrapolations through the renormalization group (RG) – that have worked very well so far upto LHC energies- must break down at some higher energy. Under the caveat of no physics beyond the SM, F.Jegerlehner extrapolated the two-loop RG results beyond the electro-weak scale and found that the quadratically divergentmass shift between the bare and renormalized Higgs mass has a zero at a mass three orders of magnitude lower than the Planck mass (used as a cut-off). This is truly remarkable because it implies an unexpected very high energy mass scale (that is close to the unificationmass scale in addition). From a completely different view, we have obtained a similar mass scale through the Trimble plot (J vs. M) ofastrophysical objects. We discuss the implied win-win situation for LHC/CERN for testing both the hypotheses of dark matter or no dark matter.