CERN Accelerating science

ALICE Papers

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2023-01-30
18:45
Symmetry plane correlations in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV / ALICE Collaboration, CERN /ALICE
A newly developed observable for correlations between symmetry planes, which characterize the direction of the anisotropic emission of produced particles, is measured in Pb--Pb collisions at $\sqrt{s_\text{NN}}$~=~2.76~TeV with ALICE. This so-called Gaussian Estimator allows for the first time the study of these quantities without the influence of correlations between different flow amplitudes. [...]
CERN-EP-2023-012.- Geneva : CERN, 2023 Draft (restricted): PDF;

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2023-01-26
11:16
ALICE upgrades during the LHC Long Shutdown 2 / ALICE Collaboration, CERN /ALICE
A Large Ion Collider Experiment (ALICE) has been conceived and constructed as a heavy-ion experiment at the LHC. During LHC Runs 1 and 2, it has produced a wide range of physics results using all collision systems available at the LHC. [...]
CERN-EP-2023-009.- Geneva : CERN, 2023 Draft (restricted): PDF;

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2023-01-23
12:50
Exploring the non-universality of charm hadronisation through the measurement of the fraction of jet longitudinal momentum carried by $\Lambda_{\rm c}^{+}$ baryons in pp collisions / ALICE Collaboration, CERN
Recent measurements of charm-baryon production in hadronic collisions have questioned the universality of charm-quark fragmentation across different collision systems. In this work the fragmentation of charm quarks into charm baryons is probed, by presenting the first measurement of the longitudinal jet momentum fraction carried by $\Lambda_{\rm c}^{+}$ baryons, $z^{\mathrm{ch}}_\mathrm{||}$, in hadronic collisions. [...]
CERN-EP-2023-005.- Geneva : CERN, 2023 Draft (restricted): PDF;

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2022-12-20
14:34
Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV /ALICE Collaboration
The azimuthal anisotropy of particles associated with jets (jet particles) at midrapidity is measured for the first time in p-Pb and Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV down to transverse momentum ($p_{\rm T}$) of 0.5 GeV/$c$ and 2 GeV/$c$, respectively, with ALICE. The second-order Fourier coefficient of the jet-particle azimuthal distribution ($v_2$) in high-multiplicity p-Pb collisions is positive, with a significance reaching 6.8$\sigma$ at low $p_{\rm T}$. [...]
arXiv:2212.12609; CERN-EP-2022-290.- Geneva : CERN, 2022 - 12 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-12-09
16:41
First measurement of prompt and non-prompt ${\rm D^{*+}}$ vector meson spin alignment in pp collisions at $\sqrt{s} = 13$ TeV
This letter reports the first measurement of spin alignment, with respect to the helicity axis, for ${\rm D^{*+}}$ vector mesons and their charge conjugates from charm-quark hadronisation (prompt) and from beauty-meson decays (non-prompt) in hadron collisions. [...]
arXiv:2212.06588 ; CERN-EP-2022-283.
- 2022. - 16 p.
Draft (restricted) - Fulltext

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2022-11-29
18:50
Measurement of (anti)nuclei production in p-Pb collisions at $\sqrt{s_{\rm NN}} = 8.16$ TeV
Measurements of (anti)proton, (anti)deuteron, and (anti)$^3$He production in the rapidity range $-1<y< 0$ as a function of the transverse momentum and event multiplicity in p-Pb collisions at a center-of-mass energy per nucleon-nucleon pair $\sqrt{s_{\rm NN}} = 8.16$ TeV are presented. [...]
arXiv:2212.04777 ; CERN-EP-2022-275.
- 2022. - 20 p.
Draft (restricted) - Fulltext

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2022-11-24
14:42
Production of pions, kaons and protons as a function of the transverse event activity in pp collisions at $\sqrt{s}$ = 13 TeV /ALICE Collaboration
The production of $\pi^\pm$, K$^\pm$, and ($\overline{\mathrm{p}}$)p is measured in pp collisions at $\sqrt{s}$ = 13 TeV in different topological regions of the events. Particle transverse momentum ($p_{\rm T}$) spectra are measured in the ``toward'', ``transverse'', and ``away'' angular regions defined with respect to the direction of the leading particle in the event. [...]
arXiv:2301.10120; CERN-EP-2022-286.- Geneva : CERN, 2022 - 25 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-11-23
19:35
Multiplicity dependence of charged-particle production in pp, p-Pb, Xe-Xe and Pb-Pb collisions at the LHC /ALICE Collaboration
Multiplicity ($N_{\mathrm {ch}}$) distributions and transverse momentum ($p_{\mathrm T}$) spectra of inclusive primary charged particles in the kinematic range of $|\eta| < 0.8$ and 0.15 GeV/$c$ $< p_{\mathrm T} < 10$ GeV/$c$ are reported for pp, p-Pb, Xe-Xe and Pb-Pb collisions at centre-of-mass energies per nucleon pair ranging from $\sqrt{s_\mathrm{NN}} = 2.76$ TeV up to 13 TeV. A sequential two-dimensional unfolding procedure is used to extract the correlation between the transverse momentum of primary charged particles and the charged-particle multiplicity of the corresponding collision. [...]
arXiv:2211.15326; CERN-EP-2022-266.- Geneva : CERN, 2022 - 24 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-11-18
22:59
Enhanced deuteron coalescence probability in jets /ALICE Collaboration
The transverse-momentum ($p_{\rm T}$) spectra and coalescence parameters $B_2$ of (anti)deuterons are measured in pp collisions at $\sqrt{s} = 13$ TeV in and out of jets. In this measurement, the direction of the leading particle with the highest $p_{\rm T}$ in the event ($p_{\rm T}^{\rm{ lead}} > 5$ GeV/$c$) is used as an approximation for the jet axis [...]
arXiv:2211.15204; CERN-EP-2022-264.- Geneva : CERN, 2022 - 11 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-11-18
19:07
Light (anti)nuclei production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV /ALICE Collaboration
The measurement of the production of deuterons, tritons and ${^{3}\mathrm{He}}$ and their antiparticles in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV is presented in this article. The measurements are carried out at midrapidity ($|y| < 0.5$) as a function of collision centrality using the ALICE detector. [...]
arXiv:2211.14015; CERN-EP-2022-263.- Geneva : CERN, 2022 - 16 p. Draft (restricted): PDF; Fulltext: PDF;

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