CERN Accelerating science

ALICE Conference Contributions

Ostatnio dodane:
2023-09-16
07:14
Particle identification with machine learning in ALICE Run 3 / Karwowska, Maja (CERN ; Warsaw U. of Tech.) ; Jakubowska, Monika (Warsaw U. of Tech.) ; Graczykowski, Łukasz (Warsaw U. of Tech.) ; Deja, Kamil (Warsaw U. of Tech. ; IDE, Oslo) ; Kasak, Miłosz (Warsaw U. of Tech.)
The main focus of the ALICE experiment, quark--gluon plasma measurements, requires accurate particle identification (PID). [...]
arXiv:2309.07768.
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2023-09-13
06:04
Monolithic Stitched Sensor (MOSS) Development for the ALICE ITS3 Upgrade / Hong, Geun Hee (Yonsei U. ; CERN) /ALICE Collaboration
The Monolithic Stitched Sensor (MOSS) chip is the first stitched prototype developed for the upgrade of the Inner Tracking System 3 (ITS3) vertexing detector in the ALICE experiment at the LHC. This upgrade aims at reducing the material budget to 0.05$\%$ X$_{0}$ per layer, achievable with a large bendable single-die sensor by replacing the water-cooling system with air flow and minimizing other external circuit components. [...]
2023 - 8 p. - Published in : PoS Pixel2022 (2023) 028 Fulltext: PDF;
In : International Workshop on Semiconductor Pixel Detectors for Tracking and Imaging (PIXEL 2022), Santa Fe, USA, 11 - 16 Dec 2022, pp.028

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2023-09-07
06:25
Hadronic resonance production in small collision systems with ALICE at the LHC / Rosano, Antonina (U. Messina (main) ; INFN, Catania) /ALICE Collaboration
Short-lived hadronic resonances are good probes to investigate the late-stage evolution of ultra-relativistic heavy ion collisions. Since they have lifetimes comparable to that of the system created after the collision, the measured yields may be affected by the competing rescattering and regeneration processes during the hadronic phase, which modify the particle's momentum distributions after hadronization. [...]
2022 - 4 p. - Published in : PoS: ICHEP2022, pp. 1066
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In : 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.1066

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2023-09-06
06:06
Thermal Radiation and Direct Photon Production in Pb–Pb and \(pp\) Collisions with Dielectrons in ALICE / Jung, Jerome (Frankfurt U.) /ALICE Collaboration
Dielectrons are a unique tool to study the space-time evolution of the hot and dense matter created in ultrarelativistic heavy-ion collisions. They are produced by a variety of processes during all stages of the collision with negligible final-state interactions. [...]
2023 - 6 p. - Published in : Acta Phys. Pol. B Proc. Suppl.: 16 (2023) , no. 1, pp. 124
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In : 29th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions, Krakow, Poland, 4 - 10 Apr 2022, pp.124

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2023-09-06
06:06
Measurement of the Hypertriton Properties and Production with ALICE / Mazzaschi, Francesco (INFN, Turin) /ALICE Collaboration
The hypertriton (3 ΛH) is a bound state of a proton, a neutron, and a Λ baryon. Studying its internal structure is crucial to investigate the hyperon–nucleon (Y –N) strong interaction and offers insights into the inner core of neutron stars, where Λ production is favoured. [...]
2023 - 6 p. - Published in : Acta Phys. Pol. B Proc. Suppl.: 16 (2023) , no. 1, pp. 149
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In : 29th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions, Krakow, Poland, 4 - 10 Apr 2022, pp.149

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2023-09-06
06:06
Thermal radiation and direct photon production in Pb-Pb and pp collisions with dielectrons in ALICE / Sekihata, Daiki (Tokyo U., CNS) /ALICE Collaboration
Dielectrons are unique tools to study the space-time evolution of the hot and dense QCD matter created in ultra-relativistic heavy-ion collisions. They are produced by a variety of processes during all stages of the collision with negligible final-state interactions. Thermal radiation from the hadronic phase contributes to the spectrum at low invariant mass ($m_{\rm ee}$), while thermal radiation from the quark-gluon plasma (QGP) at larger $m_{\rm ee}$ carries information about the early temperature of the medium. The latter is dominated by a large background from semileptonic decays of correlated heavy-flavor hadrons affected by parton energy loss and flow in the medium. In the quasi-real virtual photon region where $m_{\rm ee} \ll p_{\rm T,ee}$, the direct photon fraction can be extracted from the $m_{\rm ee}$ spectrum as a function of transverse momentum ($p_{\rm T,ee}$). In pp collisions, such measurement serves as a fundamental test for perturbative QCD calculations and as a baseline for the studies in heavy-ion collisions. We discuss the latest ALICE results on dielectron production in Pb--Pb and pp collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV and $\sqrt{s}$ = 13 TeV, respectively. The results are compared with the expected dielectron yield from known hadronic sources and predictions for thermal radiation from the medium. The production of direct photons in the different colliding systems including high-multiplicity pp collisions is also reported..
2022 - 6 p. - Published in : PoS: ICHEP2022, pp. 452
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In : 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.452

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2023-09-06
06:06
$J/\psi$ Photoproduction Results from ALICE / Herman, T (CTU, Prague) /ALICE Collaboration
Diffractive photoproduction of J/ψ vector mesons is studied at the LHC with the ALICE detector in p–Pb and Pb–Pb ultra-peripheral collisions (UPCs), where the Pb ions act as powerful sources of quasi-real photons. In this contribution, the first measurement at the LHC of dissociative photoproduction of J/ψ off protons is presented; this process is sensitive to quantum fluctuations of the structure of the target at the subnucleon level. In addition, cross sections for the exclusive channel and for continuum dimuon production at small masses were obtained in the same kinematic region. This latter process probes our simultaneous understanding, in a new kinematic region, of the photon flux emitted by protons and by lead ions. [...]
2023 - 6 p. - Published in : Acta Phys. Pol. B Proc. Suppl.: 16 (2023) , no. 1, pp. 98
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In : 29th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions, Krakow, Poland, 4 - 10 Apr 2022, pp.98

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2023-09-06
06:06
Exploring the hadronic phase of relativistic heavy-ion collisions with resonances in ALICE / Das, Prottay (NISER, Jatni ; HBNI, Mumbai) /ALICE Collaboration
Short-lived resonances are a good tool to study the hadronic phase that characterizes the late-stage evolution of heavy-ion collisions. Regeneration and rescattering processes taking part for resonances in the hadronic phase modify their measured yields. [...]
2022 - 6 p. - Published in : PoS: ICHEP2022, pp. 456
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In : 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.456

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2023-09-06
06:06
Vector Mesons Polarization in Pb–Pb and $pp$ Collisions with ALICE / Micheletti, Luca (INFN, Turin ; CERN) /ALICE Collaboration
Polarization and spin-alignment measurements represent an important tool for the understanding of particle-production mechanisms occurring in proton–proton collisions. When considering heavy-ion collisions, quarkonium polarization could also be used to investigate the characteristics of the hot and dense medium (quark–gluon plasma) created at LHC energies. [...]
2023 - 6 p. - Published in : Acta Phys. Pol. B Proc. Suppl.: 16 (2023) , no. 1, pp. 35
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In : 29th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions, Krakow, Poland, 4 - 10 Apr 2022, pp.35

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2023-09-06
06:06
J/$\psi$ photoproduction and the production of dileptons via photon-photon interactions in hadronic Pb-Pb collisions measured with ALICE / Bailhache, Raphaelle (Frankfurt U.) /ALICE Collaboration
Photon-photon and photonuclear reactions are induced by the strong electromagnetic field generated in ultra-relativistic heavy-ion collisions. These processes have been extensively studied in ultra-peripheral collisions with impact parameters larger than twice the nuclear radius. [...]
2022 - 6 p. - Published in : PoS: ICHEP2022, pp. 453
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In : 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.453

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