BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Invited talk: Kaonic atoms at DANE: where we are and where we go? DTSTART;VALUE=DATE-TIME:20220712T130000Z DTEND;VALUE=DATE-TIME:20220712T132000Z DTSTAMP;VALUE=DATE-TIME:20260720T184301Z UID:indico-contribution-44-673@indico.koza.if.uj.edu.pl DESCRIPTION:Speakers: Catalina Curceanu on behalf of Dr Alessandro Scordo\ ; National Laboratory of Frascati (LNF)\, Italy ()\nThe DAΦNE machine at the INFN Laboratories of Frascati is still the most suitable facility in t he world\, in terms of purity of the kaon beam\, luminosity\, and kinemati c conditions\, to perform measurements of kaonic atoms.\nRecent progress i n the field of X-ray detectors and their readout electronics contributed\, in these last years\, to a renewed interest in new and more precise measu rements.\nBeyond the SIDDHARTA-2 experiment\, presently installed on the D AΦNE Interaction Point exploiting 450 mm thick Silicon Drift Detectors (S DD) to measure for the first time X-rays from kaonic transitions in deuter ium\, several other important measurements are still planned or proposed.\ nThese new measurements\, among which transitions in kaonic helium\, carbo n\, sulfur\, lead\, wolfram\, nitrogen\, and molybdenum\, are now feasible thanks to new technologies: 1 mm thick SDDs\, CdZnTe\, and HPGe detectors as well as crystal spectrometers and TES microcalorimeters.\nIn this talk \, an overview of the already planned and foreseen measurements\, together with others proposed for future campaigns\, will be presented together wi th their physics case\, possible impacts\, and details of the experimental setups.\n\nhttps://indico.koza.if.uj.edu.pl/event/7/contributions/673/ LOCATION:Collegium Maius URL:https://indico.koza.if.uj.edu.pl/event/7/contributions/673/ END:VEVENT BEGIN:VEVENT SUMMARY:Invited talk: Search for η’-mesic nuclei in (p\,dp) reaction at GSI/FAIR DTSTART;VALUE=DATE-TIME:20220712T124000Z DTEND;VALUE=DATE-TIME:20220712T130000Z DTSTAMP;VALUE=DATE-TIME:20260720T184301Z UID:indico-contribution-44-672@indico.koza.if.uj.edu.pl DESCRIPTION:Speakers: Yoshiki Tanaka\; RIKEN\, Japan ()\nPossible existenc e of η′ meson nucleus bound states (η′-mesic nuclei) has been attrac ting both theoretical and experimental interests due to their relation to axial U(1) anomaly and chiral symmetry breaking in QCD. Experiments to sea rch for η′-mesic nuclei were recently performed by using the (p\,d) rea ction at GSI and by the (γ\, p) reaction at SPring-8. However\, no signif icant peak structure of the bound mesic states was so far observed\, which lead to upper limits of the formation cross sections as well as constrain ts on the η′-nucleus potential. In order to further investigate η′-m esic nuclei\, new experiments with an increased experimental sensitivity a re necessary.\n\nAt GSI/FAIR\, we have performed a new experiment in 2022 by combining the large-acceptance detector system WASA with the forward hi gh-resolution spectrometer FRS to search for η′-mesic nuclei with an im proved sensitivity. We employed a 2.5 GeV proton beam from the SIS-18 sync hrotron and used the FRS for high-resolution missing-mass spectroscopy of the 12C(p\,d) reaction near the η′-meson production threshold. Simultan eously\, possible decay particles from the produced η′-mesic nuclei\, p articularly high-energy protons\, were detected and identified by the WASA detector system surrounding the reaction target to enhance the signal-to- background ratio of the missing-mass spectrum.\n\nIn this contribution\, w e will report on this recent experiment including the status of the data a nalysis.\n\nhttps://indico.koza.if.uj.edu.pl/event/7/contributions/672/ LOCATION:Collegium Maius URL:https://indico.koza.if.uj.edu.pl/event/7/contributions/672/ END:VEVENT BEGIN:VEVENT SUMMARY:Invited talk: A bound diproton: is it “illusive” particle or e xotic nucleus? DTSTART;VALUE=DATE-TIME:20220712T122000Z DTEND;VALUE=DATE-TIME:20220712T124000Z DTSTAMP;VALUE=DATE-TIME:20260720T184301Z UID:indico-contribution-44-671@indico.koza.if.uj.edu.pl DESCRIPTION:Speakers: Ihor Kadenko\; International Nuclear Safety Center o f Taras Shevchenko National University of Kyiv\, Ukraine ()\nWe report on a search for a bound diproton\, or 2He nucleus\, by analyzing the results of irradiation of Tb and Ta samples with protons of 5.8 and 6.9 MeV energy \, correspondingly. These proton energies are about threshold energies for corresponding (p\,2p) nuclear reaction channel. The irradiated Tb and Ta samples were then counted with application of HPGe gamma-spectrometer. The peaks of 511 keV energy and of high intensities were detected in the inst rumental gamma-ray spectra. We measured its intensity vs time and derived the corresponding values for half-lives. These values are the following:\n - for Tb sample: 5\,603 ± 385 s after extended cooling of irradiated\nsam ple\;\n- for Ta sample: 1\,224 ± 56 s and 6\,307 ± 340 s.\nIn order to a ssign these half-lives to any reaction products on (p\,x) nuclear reaction s on Ta and Tb as well as impurities in these samples\, we could not ident ify any significant contributors to the 511 keV peak intensity of certain half-lives.\nThen we make an assumption about the formation of the diproto n\, or 2He bound and proton-excess nucleus\, to be a source of positrons w ith subsequent annihilation of them in a sample volume. The idea for the d iproton to exist is based on the prediction of A. Migdal in 1973 for two i dentical particles to become bound in the potential well of a heavy nucleu s but outside of its volume. This prediction was experimentally proved by us for two neutrons\, bound together in one nucleus – the dineutron and does not exclude the existence of a similar bound system\, but comprised o f two protons.\nIn the same time\, theoretical estimates for a positron de cay mode of the diproton were obtained as follows:\n- for a diproton decay into a triplet deuteron state: 1140 ± 216 s\;\n- for a diproton decay in to a singlet deuteron state: 5516 ± 1031 s.\nPossible algorithms to calcu late diproton binding energy and radius as well as mutual space arrangemen ts between a heavy nucleus and the diproton are also considered.\nBased on our preliminary results and estimates one can assume that such an approac h to generate and study diprotons in detail may result in discovery of the very unusual system “the heavy nucleus-diproton” to confirm for the d iproton the status of being the unique nucleus rather than an “illusive ” particle.\nIn addition\, the existence of such out-and-outer 2He nucle us may have far-reaching consequences on our understanding of nucleon-nucl eon and nucleon-nucleus interactions as well as practical app\n\nhttps://i ndico.koza.if.uj.edu.pl/event/7/contributions/671/ LOCATION:Collegium Maius URL:https://indico.koza.if.uj.edu.pl/event/7/contributions/671/ END:VEVENT BEGIN:VEVENT SUMMARY:Invited talk: Testing Quantum Foundations in the Cosmic Silence DTSTART;VALUE=DATE-TIME:20220712T120000Z DTEND;VALUE=DATE-TIME:20220712T122000Z DTSTAMP;VALUE=DATE-TIME:20260720T184301Z UID:indico-contribution-44-670@indico.koza.if.uj.edu.pl DESCRIPTION:Speakers: Kristian Piscicchia\; Centro Ricerche Enrico Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi"\, It aly ()\nThe VIP experiment\, operated at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN\, aims to perform high sensitivity tests of the Paul i Exclusion Principle (PEP) for electrons. In the context of Local Quantum Field Theories\, deviations from PEP are strongly constrained by the Mess iah Greenberg Superselection (MGS) rule\, which forbids superpositions of states with different symmetry. Such models can then be only tested with o pen systems. Such a condition is fulfilled in VIP-2 by introducing new ele ctrons in a pre-existing system of electrons\, and testing the resulting s ymmetry state. An overview of the latest VIP-2 Open Systems result will be presented.\n\nPEP violations\, transgressing MGS\, were recently shown to be induced by space-time non-commutativity\, a class of universality for several models of Quantum Gravity. High sensitivity tests of PEP violation in closed systems represent the better candidates to test the non-commuta tivity emergence in Quantum Gravity\, at unexpectedly high energy scales. The results of exploratory studies will be shown.\n\nThe extremely low bac kground environment of LNGS is also suitable for investigating the measure ment conundrum\, one of the main mysteries of Quantum Mechanics Foundation s. Dynamical models of wave function collapse explain the quantum-to-class ical transition by a progressive reduction of the superposition\, proporti onal to the increase of the mass of the system. The results of our analyse s\, setting the strongest bounds on the collapse models\, will be presente d.\n\nhttps://indico.koza.if.uj.edu.pl/event/7/contributions/670/ LOCATION:Collegium Maius URL:https://indico.koza.if.uj.edu.pl/event/7/contributions/670/ END:VEVENT BEGIN:VEVENT SUMMARY:Invited talk: Sensitivity of the deeply bound pionic atoms to the pion-nucleon sigma term DTSTART;VALUE=DATE-TIME:20220712T132000Z DTEND;VALUE=DATE-TIME:20220712T134000Z DTSTAMP;VALUE=DATE-TIME:20260720T184301Z UID:indico-contribution-44-674@indico.koza.if.uj.edu.pl DESCRIPTION:Speakers: Natsumi Ikeno\; Tottori University\, Japan ()\nThe d eeply bound pionic atom is known to be a very useful system to investigate the pion properties and the aspects of chiral symmetry at finite density. The pion-nucleon sigma term σπN is one of the essential quantities to i nvestigate the value of the chiral condensate in the nuclear medium. Howev er\, the σπN value has not been determined accurately enough. Therefore\ , it seems to be very interesting to determine the σπN value by the deep ly bound pionic atoms.\n\nWe have theoretically studied the sensitivity of the observables of the deeply bound pionic atoms to the pion-nucleon sigm a term σπN to investigate the possibility of the precise determination o f the value of σπN by the accurate data of the deeply bound pionic atoms expected to be obtained at RIBF/RIKEN. I will give a presentation based o n the paper of Ref. [1].\n\n[1] N. Ikeno\, T. Nishi\, K. Itahashi\, N. Nos e-Togawa\, A. Tani and S. Hirenzaki\, arXiv:2204.09211 [nucl-th].\n\nhttps ://indico.koza.if.uj.edu.pl/event/7/contributions/674/ LOCATION:Collegium Maius URL:https://indico.koza.if.uj.edu.pl/event/7/contributions/674/ END:VEVENT END:VCALENDAR