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ALICE Preprints

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2024-03-28
07:50
Particle identification with machine learning from incomplete data in the ALICE experiment / Karwowska, Maja ; Graczykowski, Łukasz ; Deja, Kamil ; Kasak, Miłosz ; Janik, Małgorzata
The ALICE experiment at the LHC measures properties of the strongly interacting matter formed in ultrarelativistic heavy-ion collisions. [...]
arXiv:2403.17436.
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2024-03-22
04:59
Experience gained about Resistive Plate Chambers ageing from the ALICE Muon TRigger/IDentifier detector / Ferretti, Alessandro
The ALICE Muon IDentifier is composed of 72 single-gap bakelite Resistive Plate Chambers, which have been operational since 2009 in maxi-avalanche mode (discrimination threshold:7 mV without amplification) with a Tetrafluoroethane/Isobutane/Sulfur Hexafluoride gas mixture, undergoing counting rates of the order of tens of Hz/cm^2. [...]
arXiv:2403.13618.
- 5 p.
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2024-03-19
12:58
Systematic study of flow vector decorrelation in $\mathbf{\sqrt{\textit{s}_{_{\bf NN}}}=5.02}$ TeV Pb--Pb collisions / Acharya, Shreyasi (Clermont-Ferrand U.) ; Adamova, Dagmar (Rez, Nucl. Phys. Inst.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) et al.
Measurements of the $p_{\rm T}$-dependent flow vector fluctuations in Pb--Pb collisions at $\sqrt{s_{_{\rm NN}}} = 5.02~\mathrm{TeV}$ using azimuthal correlations with the ALICE experiment at the LHC are presented. A four-particle correlation approach [1] is used to quantify the effects of flow angle and magnitude fluctuations separately. [...]
arXiv:2403.15213; CERN-EP-2024-084.- Geneva : CERN, 2024 - 29 p. Draft (restricted): PDF; Fulltext: PDF;

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2024-03-01
07:39
Coherent $J/\psi$ photoproduction and polarization in peripheral Pb$-$Pb collisions / Shatat, Afnan (IJCLab, Orsay)
Photonuclear reactions are induced by the strong electromagnetic field generated by ultrarelativistic heavy-ion collisions. [...]
arXiv:2402.12469.
- 4 p.
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2024-02-23
10:18
Measurement of beauty-quark production in pp collisions at $\mathbf{\sqrt{\textit{s}}=13}$ TeV via non-prompt D mesons / Acharya, Shreyasi (Clermont-Ferrand U.) ; Adamova, Dagmar (Rez, Nucl. Phys. Inst.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) et al.
The $p_{\rm T}$-differential production cross sections of non-prompt D$^{0}$, D$^{+}$, and D$^{+}_{\rm s}$ mesons originating from beauty-hadron decays are measured in proton--proton collisions at a centre-of-mass energy $\sqrt{s}$ of 13 TeV. The measurements are performed at midrapidity, $|y| < 0.5$, with the data sample collected by ALICE from 2016 to 2018. [...]
arXiv:2402.16417; CERN-EP-2024-055.- Geneva : CERN, 2024 - 30 p. Draft (restricted): PDF; Fulltext: PDF;

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2024-02-12
14:37
Jet measurements in small systems relevant for in-medium modifications / Radl, Attila Jozsef (Budapest, RMKI) /ALICE, ATLAS and CMS Collaborations
Ultrarelativistic heavy-ion collisions provide insights into the early stages of the expanding universe. The quark-gluon plasma (QGP) is a unique state of matter formed in such high-energy interactions. [...]
CMS-CR-2024-014.- Geneva : CERN, 2024 - 6 p. Fulltext: PDF;
In : 11th Large Hadron Collider Physics Conference 2023, Belgrade, Serbia, 22 - 26 May 2023

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2024-02-06
04:17
The O2 software framework and GPU usage in ALICE online and offline reconstruction in Run 3 / Eulisse, Giulio (CERN) ; Rohr, David (CERN)
ALICE has upgraded many of its detectors for LHC Run 3 to operate in continuous readout mode recording Pb--Pb collisions at 50 kHz interaction rate without trigger. [...]
arXiv:2402.01205.
- 11 p.
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2024-01-26
04:07
First study of the initial gluonic fluctuations using UPCs with ALICE / Matyja, Adam Tomasz (Cracow, INP)
Incoherent and dissociative J/$\psi$ photoproduction is sensitive to fluctuations of the gluonic structure of the target. [...]
arXiv:2401.13340.
- 4 p.
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2024-01-19
20:26
Studying the interaction between charm and light-flavor mesons / Acharya, Shreyasi (Clermont-Ferrand U.) ; Adamova, Dagmar (Rez, Nucl. Phys. Inst.) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) et al.
The two-particle momentum correlation functions between charm mesons ($\mathrm{D^{*\pm}}$ and $\mathrm{D}^\pm$) and charged light-flavor mesons ($\pi^{\pm}$ and K$^{\pm}$) in all charge-combinations are measured for the first time by the ALICE Collaboration in high-multiplicity proton-proton collisions at a center-of-mass energy of $\sqrt{s} =13$ TeV. For $\mathrm{DK}$ and $\mathrm{D^*}\mathrm{K}$ pairs, the experimental results are in agreement with theoretical predictions of the residual strong interaction based on quantum chromodynamics calculations on the lattice and chiral effective field theory. [...]
arXiv:2401.13541; CERN-EP-2024-013.- Geneva : CERN, 2024 - 33 p. Draft (restricted): PDF; Fulltext: PDF;

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2024-01-05
05:07
Direct photon $p_{\rm T}$ spectra and correlations measured with ALICE / Arata, Carolina (LPSC, Grenoble)
This contribution discusses the measurements of direct photons in pp and Pb--Pb collisions from the LHC Run 2, as recorded by the ALICE experiment. [...]
arXiv:2312.09644.
- 4 p.
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