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ATLAS Open Data to engage the public in Education and Research
Full text linkATLAS Open Data is an initiative aimed at making the data, simulations, and documentary resources of the experiment accessible to a wide audience, in accordance with the CERN Open Data policy. The project has seen the release of numerous datasets of proton-proton collisions at center-of-mass energies of 8 TeV and 13 TeV collected at the LHC during Run-1 and Run-2, allowing for the investigation of typical phenomena in high-energy physics. To facilitate their dissemination, the data are shared in accessible and commonly used formats. Additionally, they are accompanied by software and web interfaces designed for easy use, without the need for installation or coding by the user. The objective is twofold. On the one hand, the goal is to promote these activities in outreach and educational contexts, such as Summer Schools, Masterclasses, university projects, as well as various initiatives within the ATLAS Collaboration itself. On the other hand, high-energy physics
research becomes accessible to an interdisciplinary audience, involving experts from other fields to benefit from their expertise, such as machine learning and computer
science. This work provides an overview of the ATLAS Open Data resources, with concrete examples of how they can be used to promote scientific education and research in the field of particle physics
Higgs boson cross section and mass measurements in the H→γγ channel with the CMS experiment
Full text linkThis report presents a review of the measurements of the Higgs boson’s mass and production cross-section in the diphoton decay channel using data collected by the CMS experiment at the LHC. The cross-section in a fiducial phase
space was measured in Run 2 with 137 fb−1, obtaining 73.40+6.1−5.9fb, in agreement with the Standard Model theoretical value. The Higgs boson mass was measured with Run1 and Run 2 2016 data, obtaining 125.78±0.26 GeV. Due to the increased radiation damage in the calorimeters, a finer treatment of systematic uncertainties arising from longitudinal inhomogeneity in the ECAL light collection is necessary for ongoing full Run 2 analyses. Future analyses with data from Run3 are expected to improve precision both on production cross-section and on the Higgs boson’s mass
Femtoscopy in heavy-ion collision experiments at various μB
Full text linkGeometry and dynamics of the particle-emitting source in heavy-ion collisions can be inferred via the femtoscopy method. Two-particle correlations at small relative momentum exploit Quantum Statistics (QS) and the Final State Inter
actions (FSI), which allow one to study the space-time characteristics of the source of the order of 10−15 mand10−23 s. Femtoscopic measurements allow one to study FSI, especially the Strong one, which is not studied for many two-particle systems. Various experiments at LHC, RHIC, and SIS-18 facilities cover a significant part of the QCD Phase Diagram using collisions of heavy ions for several beam energies, in which regions with different μB are studied via femtoscopy. Strange hadron measurements and non-strange ones provide complementary information about source
characteristics. These proceedings exhibit the femtoscopic measurements of various particle combinations at different collision energies
Innovazione ed evoluzione regionale. Svelare le reti in conoscenza per riconoscere il potenziale innovativo localizzato
Full text linkLe reti in conoscenza possono essere considerate come nuove istituzioni economiche per l’analisi dei contesti innovativi. Tali istituzioni avrebbero il ruolo di organizzare i processi di creazione e diffusione dei flussi di informazioni e conoscenze tra gli attori di un contesto produttivo. A partire da questo riconoscimento, una maggiore
attenzione è stata rivolta alle tecniche per il disvelamento di queste reti, alle modalità per riconoscere, al loro interno, le densità corrispondenti ai poli più dinamici nel
circuito di creazione e diffusione delle conoscenze.
Focalizzando l’attenzione sul contesto industriale della regione Campania, si può osservare quanto esso sia severamente esposto alle contraddizioni evidenziate dal
cosiddetto paradosso dell’innovazione, ovvero da situazioni in cui al forte bisogno di innovazione, non corrisponde la pari capacità di assorbire le risorse pubbliche stanziate per ottenerla. Allo scopo di dimostrare l’importanza strategica di una diagnostica effettuata con l’analisi di rete, in questo contesto, forniremo le evidenze emerse da alcune ricerche condotte tra il 2014 e il 2024 ed indirizzate ad effettuare analisi esplorative del potenziale innovativo della regione Campania. Si vedrà che, nei settori ad alta intensità di conoscenze, come il biotecnologico o anche nelle produzioni culturali e creative, le linee di dialogo tra gli attori disegneranno griglie di rete entro le quali sarà più agevole individuare il bisogno di innovazione. Il presente policy brief intende segnalare l’importanza dell’analisi di rete con approccio strategico-evolutivo, per la definizione di politiche per l’innovazione
efficaci, essendo capace di fornire uno sguardo completo sulle capacità innovative localizzate
Possible signatures of short range correlations in intermediate energy heavy ion collisions
Full text linkForward angle proton spectra from min-bias collisions in the reactions of various 47 MeV/u projectiles on Sn targets are analyzed. Energy Spectra transformed to momentum space in the projectile frame reveal a 1/k4 dependence indicating a possible signature that short range correlations are observed
Recent highlights from INDRA and FAZIA
Full text linkIn this contribution, we review the recent results from the INDRA and FAZIA Collaborations. It will cover the results from INDRA-VAMOS experiments at GANIL, the first two INDRA-FAZIA campaigns at GANIL and FAZIA experiments at LNS Catania. Recent detector upgrades and developpements will
also be discussed. Those results are better explained and more detailed in the following report presentations of this issue and just a brief overview will be mentionned here, with mostly the main conclusions addressed
Latest results of data analysis related to FARCOS correlator in the CHIFAR experiment
Full text linkThe CHIFAR experiment, carried out at Laboratori Nazionali
del Sud-INFN, aims to study the reaction mechanisms and Intermediate Mass Fragments (IMFs) emission probability in non-central Heavy-Ion collisions. These phenomena are linked to the features of the Equation of State of the nuclear matter, and shine light also on the role of the isospin degree of freedom of the colliding nuclei. In the CHIFAR experiment, nuclear reactions at incident beam energy of 20 AMeV were investigated using different combinations of beams: 124Sn, 112Sn and 124Xe, and targets: 64Ni, 58Ni and 64Zn, in order to study combinations of neutron-rich and
neutron-poor systems. The experimental setup was equipped with ten telescopes of the FARCOS correlator, coupled with the 4π CHIMERA multi-detector. This coupling allowed the study of the correlations between IMFs and light charged particles emitted in a nuclear reaction. The results on the energy calibration, on the energy resolution and on the identification of the detected particles by FARCOS correlator used in the CHIFAR experiment are explained. Some preliminary results regarding the physics cases studied in the experiment are also reported
Study of the in medium cross-section and of the clustering process by means of the Bayesian technique applied to a nuclear reaction at Fermi energy
Full text linkA Bayesian analysis aimed at tuning two parameters of the AMD
model, one of them related to the in medium nucleon nucleon cross-section and the other to the clustering, has been performed. Experimental data collected with four blocks of the FAZIA setup have been compared with simulated data built with different values of the investigated parameters
Transient di-cluster systems: The Transient Rotational Model
Full text linkExotic clustering configurations are predicted to appear in the excited states of neutron-rich nuclei. These clusters are typically di-nuclear formations where one or both components consist of exotic neutron-rich nuclei. Here we discuss the results of 9Li+4He elastic scattering excitation function which shows very broad resonances at relatively high excitation energies that could be linked to this
cluster formation. To better understand the nature of these broad resonances, the Transient Rotational Model has been developed. The main features of the model will be presented
Nuclear equation of state and multi-messenger astronomy: Contribution of heavy-ion collisions
Full text linkIn the past decade, new instruments in the field of multi-messenger astronomy like LIGO, VIRGO and NICER have provided great measurements. In the meanwhile, an increasing precision in the determination of the nuclear equation of state has been reached in the field of nuclear experiments. Altogether, they allowed breakthroughs in the knowledge of neutron star properties, and in bridging nuclear experimental constraints for symmetric matter and asymmetric nuclear matter to neutron stars. In particular, we demonstrate how constraints from heavy-ion collisions play a crucial role in neutron star studies. In the near future, improvements in transport models and nuclear theories, new accelerator facilities, new experiments, in conjunction with new neutron star measurements with enhanced precision should
allow exploring the golden era of neutron star physics with heavy-ions collisions, by bridging further micro- and macroscopic collisions