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ALICE Preprints

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2024-05-08
06:49
K+K- photoproduction in ultra$-$peripheral Pb$--$Pb collisions / Kim, Minjung (UC, Berkeley ; SUNY, Stony Brook)
In ultra-peripheral collisions (UPCs) of relativistic heavy ions, photoproduction occurs when a photon emitted from one nucleus interacts with the other nucleus from the opposing beam, producing particles in the final state. [...]
arXiv:2405.02949. -
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2024-04-25
07:32
Dielectrons at the LHC -- Chances and challenges / Appelshäuser, Harald
Dielectrons are unique observables in ultra-relativistic heavy-ion collisions. [...]
arXiv:2404.15064. -
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2024-04-22
10:57
Measurement of $\Omega^{0}_{\rm c}$ baryon production and branching-fraction ratio ${\rm BR}(\Omega^0_{\rm c} \rightarrow \Omega^{-}{\rm e}^{+}\nu_{\rm e})/ {\rm BR}(\Omega^0_{\rm c} \rightarrow \Omega^{-}{\pi}^{+})$ in pp collisions at $\sqrt{s} =$ 13 TeV / 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 inclusive production of the charm-strange baryon $\Omega^0_{\rm c}$ is measured for the first time via its semileptonic decay into $\Omega^{-}\rm e^{+}\nu_{e}$ at midrapidity ($|y|<0.8$) in proton-proton (pp) collisions at the centre-of-mass energy $\sqrt{s}=13$ TeV with the ALICE detector at the LHC. The transverse momentum ($p_{\rm T}$) differential cross section multiplied by the branching ratio is presented in the interval $2<p_{\rm T}<12$ GeV/$c$. [...]
arXiv:2404.17272; CERN-EP-2024-112.- Geneva : CERN, 2024 - 21 p. Draft (restricted): PDF; Fulltext: PDF;

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2024-04-12
04:18
Two-particle angular correlations of identified particles in pp collisions at $\sqrt{s}$ = 13 TeV with ALICE / Ruggiano, Daniela (Warsaw U. of Tech.)
Two-particle angular correlation is one of the most powerful tools to study the mechanism of particle production in proton--proton (pp) collision systems by relating the difference between the azimuthal angle ($\Delta\varphi$) and the rapidity ($\Delta y$) of the particles from a pair. [...]
arXiv:2311.09833. - 7 p.
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2024-04-09
09:09
Exclusive four pion photoproduction in ultraperipheral Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV / 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 intense photon fluxes from relativistic nuclei provide an opportunity to study photonuclear interactions in ultraperipheral collisions. The measurement of coherently photoproduced $\pi^+\pi^-\pi^+\pi^-$ final states in ultraperipheral Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV is presented for the first time. [...]
arXiv:2404.07542; CERN-EP-2024-104.- Geneva : CERN, 2024 - 21 p. Draft (restricted): PDF; Fulltext: PDF;

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2024-04-09
04:57
Particle production and entropy measurement in ALICE / Hutson, Alek
One of the main goals in the study of hadronic interactions at LHC energies is the attempt to characterize the mechanisms involved in particle production in different regimes. [...]
arXiv:2404.03698. - 4 p.
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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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