Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)最新文献

{"title":"Precision Timing with the CMS MTD Barrel Timing Layer for HL-LHC","authors":"D. Del Re","doi":"10.22323/1.380.0116","DOIUrl":"https://doi.org/10.22323/1.380.0116","url":null,"abstract":"","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126848183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prospects of studying the production of hypernuclei in heavy-ion interactions at the NICA collider at JINR","authors":"V. Kireyeu, A. Mudrokh, V. Kolesnikov, A. Zinchenko, V. Vasendina, J. Aichelin, E. Bratkovskaya","doi":"10.22323/1.380.0220","DOIUrl":"https://doi.org/10.22323/1.380.0220","url":null,"abstract":"Viktar Kireyeu,a,b,g,∗ Alexander Mudrokh, Vadim Kolesnikov, Alexander Zinchenko, Veronica Vasendina, Jörg Aichelin and Elena Bratkovskaya f ,g Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna, Russia Helmholtz Forschungsakademie Hessen für FAIR (HFHF), Max-von-Laue-Str. 12, Frankfurt am Main, Germany SUBATECH, Université de Nantes, IMT Atlantique, IN2P3/CNRS 4 rue Alfred Kastler, 44307 Nantes cedex 3, France Frankfurt Institute for Advanced Studies, Ruth Moufang Str. 1, 60438 Frankfurt, Germany GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, Darmstadt, Germany f Institut für Theoretische Physik, Goethe Universität Frankfurt, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, Germany Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Center for Heavy Ion Physics, Campus Frankfurt, Max-von-Laue-Str. 12, 60438 Frankfurt, Germany","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126464276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geometrical scaling for light flavor hadrons","authors":"A. Lindner, M. Petrovici, A. Pop","doi":"10.22323/1.380.0197","DOIUrl":"https://doi.org/10.22323/1.380.0197","url":null,"abstract":"","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133960077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving spatial resolution in neutron detectors with submicrometric B4C layers","authors":"Nuno Duarte, J. Marcos, F. Amaro","doi":"10.22323/1.380.0108","DOIUrl":"https://doi.org/10.22323/1.380.0108","url":null,"abstract":"Due to their physical properties, neutrons are an excellent probe for the investigation of matter in different scientific fields, such as physics, chemistry and biology as well as for specific medical and industrial applications. Neutron detection is usually achieved via nuclear capture reactions, where the neutron is absorbed by the nucleus of an atom, which decays into two heavy charged particles. These reactions only occur with significant cross-section for a few isotopes and the ones of practical interest for detection applications are, by decreasing cross-section, He, B and Li. Until recent years, proportional counters filled with He gas were considered the golden standard for neutron detection. However, when a severe shortage of this gas was acknowledged, prices skyrocketed and heavy acquisition restrictions were implemented, which urged to pursue alternative technologies. Consequently, over the last decade, a lot of effort and investment was put into the development of He-free neutron detectors for a wide range of applications. Gaseous detectors equipped with boron layers, deposited on the inner walls of the detector or on substrates that are then inserted into it emerged as the most obvious alternative. Due to momentum and energy conservation, the reaction products of the B neutron capture are emitted along the same, in opposite directions. Consequently, in conventional boron coated detectors, for each neutron capture, only one of the reaction products can travel towards the gas to generate a signal in the detector, while the other is absorbed by the boron layer or the substrate. Furthermore, depending on the depth of the nuclear capture, the range of the α particles in typical gases used in gaseous detectors at atmospheric pressure can extend up to about 10 mm, which intrinsically limits their spatial resolution. In this work, we propose an alternative approach that aims at simultaneously detecting both secondary products of neutron capture reactions which can be achieved if thin enough converter and substrate layers are deployed. Monte Carlo simulations were developed to validate the detection concept and to optimize its geometry by computing the detection efficiency as a function of substrate and converter thicknesses. A 0.9 μm Mylar foil was stretched over an aluminium frame obtaining a smooth 100×100 mm effective surface, suitable for boron carbide (B4C) deposition. Considering this substrate, simulation results indicate that a 1.5% detection efficiency for thermal neutrons can be reached with a total 1 μm thick B4C (99% enriched) layer, equally distributed over both sides of the substrate surface. Although this value is inferior to that of conventional boron-based detectors employing a thick conversion layer (~4.5%), it offers the advantage of allowing a more precise estimation of the interaction site for each detected neutron, which leads to an improvement of spatial resolution.","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133736670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stability and causality of the relativistic third order hydrodynamics","authors":"Jobin Sebastian","doi":"10.22323/1.380.0250","DOIUrl":"https://doi.org/10.22323/1.380.0250","url":null,"abstract":"We present the analysis of linear stability and causality of the third order relativistic hydrodynamics derived in the PRC 88, 021903 [1]. Here a third order evolution equation for shear stress tensor is derived from relativistic Boltzmann equation using Chapman-Enskog expansion. We perturb the fluid system, which is initially in equilibrium and at rest, by slightly changing the energy density and fluid velocity to study its propagation. The dispersion relation for longitudinal and transverse modes of propagation is derived. It was found that there exists an acausal mode in theory around the static equilibrium. Our results match with the more detailed and elaborate analysis done in [3].","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114893925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Supernova constraints on dark flavoured sectors","authors":"Jorge Terol Calvo","doi":"10.22323/1.380.0319","DOIUrl":"https://doi.org/10.22323/1.380.0319","url":null,"abstract":"","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134523308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photo-disintegration of N=Z light nuclei using SRC-based approach","authors":"R. Dalal, Rajesh Beniwal","doi":"10.22323/1.380.0323","DOIUrl":"https://doi.org/10.22323/1.380.0323","url":null,"abstract":"The outcome of any possible nucleosynthesis scenario is strongly affected by the photodisintegration of nuclei through (γ, N) and (γ, np) channels for Eγ > 10 MeV to a few hundred MeV. Though there is a wide range of phenomenological models for the estimation of excitation functions in this energy region, the exact photodisintegration mechanism is not well understood. The shell-model based approaches have not been successful even for the light nuclei of astrophysical importance like Li. A simple SRC-based approach is employed to calculate the photo-disintegration of light nuclei in the quasideuteron region. Combining the Gunn-Irving photo-disintegration for α-cluster, the proposed approach is used to calculate the total photodisintegration cross-sections for Eγ between 10 to 140 MeV for many of the N=Z light nuclei from He to Ca. Contrary to general perception, the quasideuteron photo-disintegration contribution starts in the GDR region itself and dominates for Eγ > 50 MeV. Along with many interesting new insights, the derivation of the Levinger formula is obtained without any additional assumption. A significant fraction of the photo-disintegration cross-section in GDR region may be accounted by contribution of quasi-α degree of freedom which decreases for higher Eγ. The present work suggests an alternative and viable description of photodisintegration for N=Z nuclei.","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129014687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Searches for Chiral Magnetic Effect and Chiral Magnetic Wave in Xe-Xe and Pb-Pb collisions with ALICE","authors":"A. Danu","doi":"10.22323/1.380.0364","DOIUrl":"https://doi.org/10.22323/1.380.0364","url":null,"abstract":"An important property of the strong interaction which is potentially observable in heavy-ion collisions is local parity violation. It manifests as a charge separation along the direction of the magnetic field, a phenomenon called the Chiral Magnetic Effect (CME). A similar effect in which the presence of a vector charge (e.g., electric charge) causes a separation of chiralities is the Chiral Separation Effect (CSE). Their coupling leads to a wave propagation of the electric charge called the Chiral Magnetic Wave (CMW), causing a charge-dependent anisotropic flow. The charge dependence of the three-particle correlator γab, often employed as evidence for the CME, is measured in Xe–Xe collisions at sNN = 5.44 TeV. This correlator depends strongly on centrality and is similar to that in Pb–Pb collisions. This finding and the prediction of a significantly larger CME signal in Pb–Pb than Xe–Xe collisions from Monte Carlo calculations including amagnetic field due to spectators point to a large non-CME contribution to the correlator. Furthermore, it is reproduced by the Anomalous Viscous Fluid Dynamics model with values of the CME signal close to zero and by a blast wave model calculation that incorporates background effects. The charge dependence of elliptic (v2) and triangular (v3) flow coefficients of unidentified charged hadrons and pions are used to search for the CMW in Pb–Pb collisions atsNN = 5.02TeV. The v3 results are consistent with those of v2, which suggests a significant background contribution. *** Particles and Nuclei International Conference PANIC2021 *** *** 5 10 September, 2021 *** *** Online ***","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122009613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-differential studies to explore strangeness enhancement in pp collisions with ALICE at the LHC","authors":"C. De Martin","doi":"10.22323/1.380.0203","DOIUrl":"https://doi.org/10.22323/1.380.0203","url":null,"abstract":"The relative production rate of (multi-)strange hadrons in high multiplicity hadronic interactions is enhanced with respect to the one measured at lower multiplicities and reaches values observed in heavy-ion collisions. The microscopic origin of this striking phenomenon, historically interpreted as a signature of quark-gluon plasma (QGP) formation in heavy-ion collisions, is still unknown: is it related to soft particle production or to hard scattering events, such as jets? Is it related to final particle multiplicity only or does it also depend on initial state effects? The ALICE experiment has addressed these questions by performing dedicated measurements in pp collisions at √ B = 13 TeV. To separate strange hadrons produced in jets from those produced in soft processes, the angular correlation between high-?T charged particles and strange hadrons has been exploited. The nearside jet yield and the out-of-jet yield ofK0 S andΞ have been studied as a function of the multiplicity of charged particles produced in pp collisions. Moreover, a multi-differential analysis has been carried out to disentangle the contribution of final state multiplicity from the one of effective energy available for strange particle production. The effective energy has been estimated by subtracting the energy measured in the Zero Degree Calorimeters (ZDC) from the centre-of-mass energy. The results suggest that soft (i.e. out-of-jet) processes are the dominant contribution to strange particle production and that initial state properties do not play a significant role in strangeness production, which is mainly driven by final particle multiplicity.","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"385 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116491781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Status and perspectives for low energy kaon-nucleon interaction studies at DAFNE: from SIDDHARTA to SIDDHARTA-2","authors":"F. Sirghi","doi":"10.22323/1.380.0200","DOIUrl":"https://doi.org/10.22323/1.380.0200","url":null,"abstract":"","PeriodicalId":135659,"journal":{"name":"Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122957885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}