Tag Archives: Evento scientifico

While the ATLAS/CMS experiments discovered a Standard Model-like Higgs boson, no compelling new physics signal has been seen yet. Lack of experimental evidence of sparticles has pushed the lower limit on their masses in the multi-TeV regime. LHC searches for weak scale supersymmetry (SUSY) show that gluinos should lie beyond 2.2 TeV and top squarks beyond 1.1 TeV. Such high mass limits are well beyond early upper limits from naturalness and gives rise to the question whether SUSY is now unnatural.  We critique the older notions of naturalness and suggest an update based on the more conservative electroweak measure.  In that case, SUSY with light higgsinos and highly mixed TeV-scale top squarks is still quite natural.The emergence of the string landscape within the setting of eternal inflation adds substance to the naturalness debate.  In this case, a statistical pull to large soft terms must be balanced by the requirement that the derived weak scale lie within the narrow anthropic window. Then the landscape predicts a Higgs mass around 125 GeV, with sparticles, except light higgsinos, generally beyond LHC reach. We outline the consequences of this “stringy naturalness” for future colliders and dark matter searches.              

Certain anomalies observed in the angular correlation spectra of electron/positron pairs produced in nuclear transitions of 8Be, 4He and 12C can be interpreted as the emission of a bosonic particle with a mass of 17 MeV, that promptly decays into e+e−. I review the current status of these anomalies, and some theoretical interpretation for the hypothetical new particle. I will also describe the experimental prospects for validating or disproving the X17 hypothesis, and I will stress the importance of verifying the nuclear physics experimental hint by means of a particle physics experiment.   Join Zoom Meeting https://infn-it.zoom.us/j/89444651263?pwd=dGNOckhpUDhibVlSRnJxOWNPellRUT09 Meeting ID: 894 4465 1263 Passcode: 625539      

  Chairs: Marco Mirazita, Laboratori Nazionali di Frascati, INFN, Italy Patrizia Rossi, Laboratori Nazionali di Frascati, INFN, Italy Organizing Committee: Harutyun Avagyan, Jefferson Lab, USA Fatiha Benmokhtar, Duquesne University, USA   Location The workshop will be held at the Frascati National Laboratories of INFN in the Conversi room (Bldg. 57, access from Via E. Fermi, 54 – see map).   Additional Information LNF Guest house booking How to reach the Lab Zoom link            

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 2022 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 MDPI journal (Materials, IF=2.972). 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 or pdf file (max. 3 pages) to bellucci@lnf.infn.it by 30th November 2022, specifying whether it is meant for oral or poster presentation. Authors will be notified of the acceptance of their submission. REGISTRATION There is no fee for attendance, however registration is mandatory and must be submitted by 30th November 2022. HOTEL ACCOMMODATION Hotel reservation is the responsibility of the participants. Additional information can be found in the web site. LOC: S. Bellucci (Chair), Y. Gnilitskyi, D. Mencarelli, F. Micciulla, L. Pierantoni, M. Regi, …

  We are glad to announce and welcome you to the LNF Session of the workshop:  “Nuclear Physics Mid Term Plan in Italy”. This workshop, divided on a series of four sessions, is dedicated to future nuclear physics research in Italy with particular emphasis on INFN laboratories that are preparing important upgrades for the accelerators complexes. Session  LNS (4-5 April 2022) Session  LNL (11-12 April 2022) Session  LNGS (11 October 2022) Session LNF (1-2 December 2022) The LNF Session will start on December, 1st at 9 am and will end on December, 2nd around 6.30 pm. During the two days, the conveners of the WG will report on their activities and will describe the future perspectives on Nuclear Physics detectors and the potentialities on Nuclear Physics measurements at LNF. The activities will be organized in the following Working Groups:   Organizing Committee of the workshop: Giovanna Benzoni      Diego Bettoni      Fabio Bossi      Gustavino Carlo Maria Colonna      Antonino di Leva      Enrico Fioretto      Alba Formicola Lorenzo Fortunato      Santo Gammino      Fabiana Gramegna      Matthias Junker Marco La Cognata      Ivano Lombardo      Rosario Nania      Ezio Previtali Stefano Romano      Paolo Russotto      Francesca Soramel      Jose Javier Valiente-Dobón   Scientific secretaries: Eugenia Naselli           Alessandro Oliva           Julgen Pellumaj           Marta Polettini Secretary: Alessandra Tamborrino Orsini      Sponsors This event is kindly supported by:

We are glad to announce and welcome you to the LNF Session of the workshop:  “Nuclear Physics Mid Term Plan in Italy”. The workshop will be held in the Bruno Touschek Auditorium (Bldg. 36, access from LNF secondary entrance in Via E. Fermi, 60 – see map). Since the workshop will be held in blended mode (online and in presence), online attendees can remotely join the Session via the following Zoom meeting link: https://cern.zoom.us/j/63753264983?pwd=a001L0pwbmpGdnVRMjF4Q1NpWDk3Zz09 This workshop, divided on a series of four sessions, is dedicated to future nuclear physics research in Italy with particular emphasis on INFN laboratories that are preparing important upgrades for the accelerators complexes. Session  LNS (4-5 April 2022) Session  LNL (11-12 April 2022) Session  LNGS (11 October 2022) Session LNF (1-2 December 2022) The LNF Session will start on December, 1st at 9 am and will end on December, 2nd around 6.30 pm. During the two days, the conveners of the WG will report on their activities and will describe the future perspectives on Nuclear Physics detectors and the potentialities on Nuclear Physics measurements at LNF. The activities will be organized in the following Working Groups:   Organizing Committee of the workshop: Giovanna Benzoni      Diego Bettoni      Fabio Bossi      Gustavino Carlo Maria Colonna      Antonino di Leva      Enrico Fioretto      Alba Formicola Lorenzo Fortunato      Santo Gammino      Fabiana Gramegna      Matthias Junker Marco La Cognata      Ivano Lombardo      Rosario Nania      Silvia Pisano Ezio Previtali      Stefano Romano      Paolo Russotto      Francesca Soramel Jose Javier Valiente Dobon     …

  In this talk I will present how the idea of energy-peak invariance, already applied at the jet-energy level, can be applied on the decay-length spectrum of B-hadrons produced at the LHC from top quarks to measure the top-quark mass without uncertainties from jet energy scale calibration and without any significant sensitivity to the precise dynamics governing top production at the LHC. These two uncertainties have played a major role in top-quark mass extraction so far, thus this method opens the way to new measurements with reduced uncertainty. I will also discuss in detail the possible theory uncertainties that affect this strategy and the necessary level of control on hadronization dynamics that is going to be needed to carry out this measurement.              

FOR THOSE WHO WILL PARTICIPATE ON SITE, PLEASE BRING WITH YOU THE HARD COPY OF YOUR TICKET (DOWNLOADABLE FROM YOUR REGISTRATION FORM). THE QR CODE ON IT WILL BE USED FOR THE CHECK IN.   The Eupraxia preparatory Phase Kick-off Meeting will be hybrid, for those who will participate remotely a zoom link will be provided (already sent on Nov. 21) for those who are in presence the meeting will be held in Aula Touschek – LNF Auditorium (Bldg. 36). All participants (on site and remote) have to register through the website. NO REGISTRATION FEE is required to attend the meeting. EuPRAXIA, the European Plasma Research Accelerator with eXcellence In Applications, is a distributed, compact and innovative accelerator facility based on plasma technology. Based on its Conceptual Design Report, published in 2020, and its government support the EuPRAXIA Research Infrastructure has been selected as only particle accelerator project for the 2021 Roadmap Update of the European Strategy Forum on Research Infrastructures (ESFRI). In its first phase, its consortium will construct an electron beam-driven plasma accelerator in the metropolitan area of Rome, thus bringing innovation, potential for spin-off companies, state-of-the art scientific applications and a vibrant international user community to the middle of Italy. In its second phase, EuPRAXIA will build a laser-driven plasma accelerator at a site to be chosen between several options in Europe.  EuPRAXIA will serve users in ultra-fast science, e.g. on high-resolution medical imaging, deeply penetrating positron annihilation spectroscopy for materials and with Europe’s most southern free-electron laser (FEL). It will offer fascinating …

  We present the extraction of heavy mesons fragmentation functions using a phenomenological approach. For the first time, we calculate non-perturbative fragmentation functions for B and D mesons at NNLO in the so-called zero-mass variable-flavour-number scheme in QCD. We will also incorporate the effect of charmed-meson mass corrections and determine D-meson fragmentation functions by fitting LEP and SLD data. We present NNLO single-inclusive production cross sections in electron-positron annihilation and estimate the uncertainties by means of the Hessian approach. The comparison with other calculations is discussed as well.