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ALICE Papers

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2022-11-07
22:29
Measurement of the angle between jet axes in pp collisions at $\sqrt{s}=5.02$ TeV / ALICE Collaboration, CERN
This article reports measurements of the angle between differently defined jet axes in pp collisions at $\sqrt{s} = 5.02$ TeV carried out by the ALICE Collaboration. Charged particles at midrapidity are clustered into jets with resolution parameters $R=0.2$ and 0.4. [...]
CERN-EP-2022-242.- Geneva : CERN, 2022 Draft (restricted): PDF;

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2022-10-27
09:39
Two-particle transverse momentum correlations in pp and p-Pb collisions at LHC energies / ALICE Collaboration, CERN /ALICE
Two-particle transverse momentum differential correlators, recently measured in Pb-Pb collisions at LHC energies, provide an additional tool to gain insights into particle production mechanisms and infer transport properties, such as the ratio of shear viscosity to entropy density, of the medium created in Pb--Pb collisions. The longitudinal long-range correlations and the large azimuthal anisotropy measured at low transverse momenta in small collision systems, namely pp and p-Pb, at LHC energies resemble manifestations of collective behaviour. [...]
CERN-EP-2022-230.- Geneva : CERN, 2022 - 22. Draft (restricted): PDF;

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2022-10-25
16:27
The ALICE experiment - A journey through QCD / ALICE Collaboration, CERN /ALICE
The ALICE experiment was proposed in 1993, to study strongly interacting matter at extreme energy densities via a comprehensive investigation of nuclear collisions at the LHC. Its physics programme initially focused on the determination of the properties of the Quark-Gluon Plasma (QGP), a deconfined state of quarks and gluons and was extended along the years, covering a diverse ensemble of observables related to Quantum Chromodynamics (QCD), the theory of strong interactions. [...]
CERN-EP-2022-227; arXiv:2211.04384.- Geneva : CERN, 2022 - 328 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-10-24
10:33
Jet-like correlations with respect to ${\rm K}^{0}_{\rm{S}}$ and $\Lambda$($\overline{\Lambda}$) in pp and Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV} /ALICE Collaboration
Two-particle correlations with ${\rm K}^{0}_{\rm{S}}$, $\Lambda$/$\overline{\Lambda}$, and charged hadrons as trigger particles in the transverse momentum range $8 < p_\mathrm{T,trig}<16$ GeV/$c$, and associated charged particles within $1 < p_\mathrm{T,assoc}<8$ GeV/$c$, are studied at mid-rapidity in pp and central Pb-Pb collisions at a centre-of-mass energy per nucleon-nucleon collision $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV with the ALICE detector at the LHC. After subtracting the contributions of the flow background, the per-trigger yields are extracted on both the near and away sides, and the ratio in Pb-Pb collisions with respect to pp collisions ($I_{\mathrm {AA}}$) is computed. [...]
CERN-EP-2022-225; arXiv:2211.01197.- Geneva : CERN, 2022 - 19 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-10-19
22:54
Search for the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Xe-Xe collisions at $\sqrt{s_{\mathrm{NN}}} = 5.44$ TeV /ALICE Collaboration
Charge-dependent two- and three-particle correlations measured in Xe-Xe collisions at $\sqrt{s_{\mathrm{NN}}} = 5.44$ TeV are presented. Results are obtained for charged particles in the pseudorapidity range $|\eta|<0.8$ and transverse momentum interval $0.2 \le p_{\rm T}<5.0$ GeV/$c$ for different collision centralities. [...]
arXiv:2210.15383; CERN-EP-2022-220.- Geneva : CERN, 2022 - 16 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-10-17
17:40
Production of ${\rm K}^{0}_{\rm{S}}$, $\Lambda$ ($\overline{\Lambda}$), $\Xi^{\pm}$ and $\Omega^{\pm}$ in jets and in the underlying event in pp and p$-$Pb collisions / ALICE Collaboration, CERN
The production of strange hadrons (${\rm K}^{0}_{\rm{S}}$, ${\Lambda}$, $\Xi^{\pm}$, and $\Omega^{\pm}$), baryon-to-meson ratios (${\Lambda}/{\rm K}^{0}_{\rm{S}}$, $\Xi/{\rm K}^{0}_{\rm{S}}$, and $\Omega/{\rm K}^{0}_{\rm{S}}$), and baryon-to-baryon ratios ($\Xi/{\Lambda}$, $\Omega/{\Lambda}$, and $\Omega/\Xi$) associated with jets and the underlying event were measured as a function of transverse momentum ($p_{\rm T}$) in pp collisions at $\sqrt{s} = 13$~TeV and p$-$Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$~TeV with the ALICE detector at the LHC. The inclusive production of the same particle species and the corresponding ratios are also reported. [...]
CERN-EP-2022-218.- Geneva : CERN, 2022 Draft (restricted): PDF;

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2022-10-11
00:00
$\psi(2S)$ suppression in Pb–Pb collisions at the LHC / ALICE Collaboration, CERN /ALICE
The production of the $\psi(2S)$ charmonium state was measured with ALICE in Pb–Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV, in the dimuon decay channel. A significant signal was observed for the first time at LHC energies down to zero transverse momentum, at forward rapidity ($2.5<y<4$) [...]
CERN-EP-2022-210; arXiv:2210.08893.- Geneva : CERN, 2022 - 11 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-10-10
18:03
Measurements of azimuthal anisotropies at forward and backward rapidity with muons in high-multiplicity p-Pb collisions at $\sqrt{s_{\rm NN}} = 8.16$ TeV /ALICE Collaboration
The study of the azimuthal anisotropy of inclusive muons produced in p–Pb collisions at $\sqrt{s_{\rm NN}} = 8.16$ TeV, using the ALICE detector at the LHC is reported. The measurement of the second-order Fourier coefficient of the particle azimuthal distribution, $v_2$, is performed as a function of transverse momentum $p_{\rm T}$ in the 0–20\% high-multiplicity interval at both forward ($2.03 < y_{\rm cms} < 3.53$) and backward ($-4.46 < y_{\rm cms} < -2.96$) rapidities over a wide $p_{\rm T}$ range, $0.5 < p_{\rm T} < 10$ GeV/$c$, in which a dominant contribution of muons from heavy-flavour hadron decays is expected at $p_{\rm T} > 2$ GeV/$c$. [...]
CERN-EP-2022-209; arXiv:2210.08980.- Geneva : CERN, 2022 - 23 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-09-09
12:18
Measurement of the lifetime and $\Lambda$ separation energy of $^{3}_{\Lambda}\mathrm H$ / ALICE Collaboration, CERN
The most precise measurements to date of the $^{3}_{\Lambda}\mathrm H$ lifetime $\tau$ and $\Lambda$ separation energy ${\rm B}_{\Lambda}$ are obtained using the data sample of Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV collected by ALICE at the LHC. The $^{3}_{\Lambda}\mathrm H$ is reconstructed via its charged two-body mesonic decay channel ($^{3}_{\Lambda}\mathrm{H} \rightarrow$ $^3$He + $\pi^-$ and the charge-conjugate process). [...]
arXiv:2209.07360; CERN-EP-2022-188.- Geneva : CERN, 2022 - 10 p. Draft (restricted): PDF; Fulltext: PDF;

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2022-09-07
15:30
Neutron emission in ultraperipheral Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV / ALICE Collaboration, CERN /ALICE
In ultraperipheral collisions (UPCs) of relativistic nuclei without overlap of nuclear densities, the two nuclei are excited by the Lorentz-contracted Coulomb fields of their collision partners. In these UPCs, the typical nuclear excitation energy is below a few tens of MeV, and a small number of nucleons are emitted in electromagnetic dissociation (EMD) of primary nuclei, in contrast to complete nuclear fragmentation in hadronic interactions. [...]
arXiv:2209.04250; CERN-EP-2022-186.- Geneva : CERN, 2022 - 18 p. Draft (restricted): PDF; Fulltext: PDF;

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