Tag Archives: Evento scientifico

The SESAME Proposal Review Committee (PRC) is an international advisory body, established by the SESAME Director to provide counsel regarding the allocation of user beam time. The PRC undertakes this responsibility by thoroughly assessing the scientific and technological merit of proposals submitted by the General Users (GUs) and ascertaining their priority. This assessment is guided by criteria aligned with IUPAP’s Recommendations for the Use of Major Physics Users Facilities. The forthcoming PRC meeting is scheduled to convene in Frascati.

SciCom

The interpretation of LHC data, and the assessment of possible hints of new physics, requires the precise knowledge of the proton subnuclear structure in terms of parton distribution functions (PDFs). In this talk, I present a systematic methodology designed to determine whether and how global PDF fits might inadvertently ‘fit away’ signs of new physics in the high-energy tails of the distributions.I showcase a scenario, in which the PDFs may completely absorb such signs of new physics, thus biasing theoretical predictions and their interpretation. I discuss strategies to single out the effects in this scenario and disentangle the inconsistencies that stem from them. Finally, I will present a new tool that is able to perform simultaneous fits of PDFs and SMEFT Wilson coefficients that might help disentangling the effects highlighted in this talk.    

The nuclear equation of state is well known at the low-density from the study of finite nuclear. Conversely, perturbative QCD describes nuclear matter existing as deconfined quark-gluon plasma when the densities become extremely high. However, the intermediate range is yet to be determined. To nuclear theorist neutron stars are interesting because their core densities sit precisely in this region. Measurements of their mass, radii and now the tidal deformability help constrain the nuclear equation of state. The highest mass stars are now observed to be over 2 solar masses with the possibility of reaching 2.3. What is interesting is that hadronic models, subjected to beta equilibrium, should not predict the existence of heavy neutron stars due to the appearance of hyperons. Hyperons are thought to appear around 3-4 times saturation density and rob pressure generated via neutron degeneracy. This in turn lowers the maximum mass in which the theory can predict. The observation of heavy neutron stars suggest that additional repulsion must be present if one is to reasonably presume strange baryons in the cores of heavy neutron stars.  In this presentation I will describe in more detail the hyperon crisis and the relevant physics for high density repulsion within the framework of the quark-meson-coupling model (QMC).

We are pleased to announce the 15th workshop on breakdown science and high gradient technology, HG2023, that will be held in person in Italy at the Frascati National Labs of INFN – Via Enrico Fermi, 60 – Frascati (Rome) from 16 to 20 October 2023.In order to allow a remote participation to the event a zoom link has been set up. Look for the new item on the left (Videoconference). An INFN indico account is requested to login in and join the meeting (all instructions are available), if you haven’t it please create a new one. Without the log in, the incomplete zoom link will ask for a pass code.In case of problems send an e-mail to: hg2023@lists.lnf.infn.it The demand for pushing the RF structures operation to higher and higher accelerating gradients has been historically driven by the High Energy Physics community need of expanding the energy frontier of the discovery machines. This demand is still far to be exhausted, as clearly stated in the Accelerator R&D Roadmap for the European HEP Strategy released in late 2021. But high gradients are also extremely beneficial for accelerators destinated to different fields, such as compact light sources, medical and industrial applications, that are growing more and more as new drivers of the HG technology.The HG workshop covers revisitations of basics and fundamentals concepts, recent theoretical and experimental achievements, advancements in modelling and understanding of the breakdown phenomena, new design concepts and innovation in manufacturing techniques, ideas and experimental activities towards more powerful and …

In my talk I discuss on what is currently known on the theoretical interpretation of the top-quark mass parameter in Monte-Carlo event generators (MCs), as measured in the direct top-mass measurements. The interpretation is associated to the perturbative part of the MCs, namely the parton shower, as well as on the way howthe infrared evolution of the parton shower is terminated through thecutoff parameter. Nevertheless, also the hadronization modelplays an important role. This implies that, in order to solve the top-mass interpretation problem, the shower cutoff should be treated like a factorization scale and not like a tuned parameter. I explain the conceptual and practical implications of this rather novel view, and its interplay with the top-mass calibration method, which I have developed some time ago.    

The Stawell Underground Physics Laboratory (SUPL) is a newly built underground facility in regional Victoria, Australia. The laboratory is be located 1024 m underground (~2900 m water equivalent) within the Stawell Gold Mine and its construction has been completed in 2022/2023. The laboratory will house rare event physics searches, including the upcoming SABRE South dark matter experiment, as well as measurement facilities to support low background physics experiments and applications such as radiobiology and quantum computing. SABRE South will be the first experiment assembled in SUPL and its commissioning is expected to occur in 2023/2024. SABRE South is part of the SABRE experiment which aims to detect an annual rate modulation from dark matter interactions in ultra-high purity NaI(Tl) crystals in order to provide a model independent test of the signal observed by DAMA/LIBRA. SABRE South has different shielding design than SABRE North and it is designed to disentangle seasonal or site-related effects from the dark matter-like modulated signal by using an active veto and muon detection system.  Ultra-high purity NaI(Tl) crystals are immersed in a linear alkyl benzene (LAB) based liquid scintillator veto, further surrounded by passive steel and polyethylene shielding and a plastic scintillator muon veto. Significant work has been undertaken to understand and mitigate the background processes, that take into account radiation from the detector materials, from both intrinsic and cosmogenic activated processes, and to understand the performance of both the crystal and veto systems. This talk will report on the design of SUPL and on the status of the SABRE South assembly.

The Dark Energy from Fundamental Theories to Observations Conference will be held in the Bruno Touschek Auditorium (Bldg. 36, access from LNF secondary entrance in Via E. Fermi, 60 – see map).        (Talks by invitation only)You are welcome to download the conference poster here.Aim of the meeting:The problem of dark energy has unprecedentedly taken a central stage in the gravitation and cosmology research field, also in the view of the discrepancies found in the current expansion of the Universe as derived from Planck data and from local direct measurements. In this regard, we aim at organising an international workshop to discuss dark energy both from the theoretical and observational points of view. The workshop will be a precursor to the growing interest that this topic will gain in the near future due to the Euclid satellite, whose launch is planned for later this year, complementary ground-based observatories and Cosmic Microwave Background data. We would like to gather experts (both from the theory and observational sides) to understand together, through talks and discussion sessions, which predictions of fundamental theories can be tested by observations and, conversely, which new roads in fundamental physics may be opened by the future data. Important dates: May    1, 2023 –  Program announcement July    10, 2023 –  Deadline to apply for participation and poster presentationJuly    14, 2023 – Notification of acceptance of participation and postersOrganising Committee:Luca Buoninfante (Nordita) Alexey Koshelev (ShanghaiTech University, Shanghai & University of Beira Interior, Covilha) K. Sravan Kumar (ICG, U. of Portsmouth) Gaetano …

The mini-workshop has the aim to gather experimentalists and theorists working in the field of exotic atoms, with particular application to kaonic atoms, to discuss the outcome of the ongoing experiments at DAFNE and plan future activities. The impact of kaonic atoms studies in particle and nuclear physics, as well as in astrophysics and foundation of physics will be addressed.The mini-workshop is organized with the support of the INFN-LNF, the Foundational Questions Institute (Grant No. FQXi-RFP-CPW-2008), the John Templeton Foundation (Grant 62099), the STRONG-2020 EU project (grant agreement No 824093), the MITIQO project n. A0375-2020-36647,“Gruppi di ricerca 2020” – POR FESR Lazio 2014-2020 and FWF Austria.ZOOM link for remote participation:https://infn-it.zoom.us/j/83563123117   Chairs:Catalina Oana Curceanu, INFN-LNF, Frascati, ItalyMihail Iliescu, INFN-LNF, Frascati, Italy Alessandro Scordo, INFN-LNF, Frascati, ItalyFlorin Sirghi, INFN-LNF, Frascati, ItalyJohann Zmeskal, SMI-Vienna, Austria Local Organizers:Simone Manti, INFN-LNF, Frascati, ItalyFabrizio Napolitano, INFN-LNF, Frascati, ItalyDiana Laura Sirghi,  INFN-LNF, Frascati, ItalyFrancesco Sgaramella,  INFN-LNF, Frascati, Italy Secretariat:Alessandra Tamborrino Orsini, INFN-LNF, Frascati, Italy   

The mini-workshop has the aim to gather experimentalists and theorists working in the field of exotic atoms, with particular application to kaonic atoms, to discuss the outcome of the ongoing experiments at DAFNE and plan future activities. The impact of kaonic atoms studies in particle and nuclear physics, as well as in astrophysics and foundation of physics will be addressed.The mini-workshop is organized with the support of the INFN-LNF, the Foundational Questions Institute (Grant No. FQXi-RFP-CPW-2008), the John Templeton Foundation (Grant 62099), the STRONG-2020 EU project (grant agreement No 824093), the MITIQO project n. A0375-2020-36647,“Gruppi di ricerca 2020” – POR FESR Lazio 2014-2020 and FWF Austria.ZOOM link for remote participation:https://infn-it.zoom.us/j/83563123117   Chairs:Catalina Oana Curceanu, INFN-LNF, Frascati, ItalyMihail Iliescu, INFN-LNF, Frascati, Italy Alessandro Scordo, INFN-LNF, Frascati, ItalyFlorin Sirghi, INFN-LNF, Frascati, ItalyJohann Zmeskal, SMI-Vienna, Austria Local Organizers:Simone Manti, INFN-LNF, Frascati, ItalyFabrizio Napolitano, INFN-LNF, Frascati, ItalyDiana Laura Sirghi,  INFN-LNF, Frascati, ItalyFrancesco Sgaramella,  INFN-LNF, Frascati, Italy Secretariat:Alessandra Tamborrino Orsini, INFN-LNF, Frascati, Italy