ALICE

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2022-01-17
14:35
OpenAccess [GSI-2022-00112] Journal Article
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Coherent $J/ \psi$ and $\phi$' photoproduction at midrapidity in ultra-peripheral Pb–Pb  collisions at $\sqrt {s_{NN}}$ = 5.02 TeV
[CERN-EP-2021-002; arXiv:2101.04577]
The coherent photoproduction of $\rm{J/\psi}$ and $\rm{\psi'}$ mesons was measured in ultra-peripheral Pb-Pb collisions at a center-of-mass energy $\sqrt{s_{\mathrm{NN}}}~=~5.02$ TeV with the ALICE detector. Charmonia are detected in the central rapidity region for events where the hadronic interactions are strongly suppressed. [...]
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2022-01-17
14:31
OpenAccess [GSI-2022-00111] Journal Article
; ; ; et al
First measurement of coherent ρ$^0$ photoproduction in ultra-peripheral Xe–Xe collisions at $\sqrt{s_{\rm NN}}$ = 5.44 TeV
[CERN-EP-2020-252; arXiv:2101.02581]
The first measurement of the coherent photoproduction of ρ$^0$ vector mesons in ultra-peripheral Xe–Xe collisions at $\sqrt{s_{\rm NN}}$ = 5.44 TeV is presented. This result, together with previous HERA γp data and γ–Pb measurements from ALICE, describes the atomic number (A) dependence of this process, which is particularly sensitive to nuclear shadowing effects and to the approach to the black-disc limit of QCD at a semi-hard scale. [...]
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2022-01-17
14:26
OpenAccess [GSI-2022-00110] Journal Article
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Production of pions, kaons, (anti-)protons and $\phi $ mesons in Xe–Xe collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.44 TeV
[CERN-EP-2020-249; arXiv:2101.03100]
The first measurement of the production of pions, kaons, (anti-)protons and $\phi $ mesons at midrapidity in Xe–Xe collisions at $\sqrt{s_{\mathrm{NN}}} = 5.44~\text {TeV}$ is presented. Transverse momentum ($p_{\mathrm{T}}$) spectra and $p_{\mathrm{T}}$-integrated yields are extracted in several centrality intervals bridging from p–Pb to mid-central Pb–Pb collisions in terms of final-state multiplicity. [...]
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2022-01-17
14:23
OpenAccess [GSI-2022-00109] Journal Article
; ; ; et al
Pseudorapidity distributions of charged particles as a function of mid- and forward rapidity multiplicities in pp collisions at $\sqrt{s}$ = 5.02, 7 and 13 TeV
[CERN-EP-2020-170; arXiv:2009.09434]
The multiplicity dependence of the pseudorapidity density of charged particles in proton–proton (pp) collisions at centre-of-mass energies $\sqrt{s}~=~5.02$, 7 and 13 TeV measured by ALICE is reported. The analysis relies on track segments measured in the midrapidity range ($|\eta | < 1.5$). [...]
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2022-01-17
14:20
OpenAccess [GSI-2022-00108] Journal Article
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Soft-Dielectron Excess in Proton-Proton Collisions at $\sqrt{s}$ = 13 TeV
[CERN-EP-2020-095; arXiv:2005.14522]
A measurement of dielectron production in proton-proton (pp) collisions at $\sqrt{s} = 13$ TeV, recorded with the ALICE detector at the CERN LHC, is presented in this Letter. The data set was recorded with a reduced magnetic solenoid field. [...]
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2022-01-17
14:12
OpenAccess [GSI-2022-00107] Journal Article
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Production of muons from heavy-flavour hadron decays at high transverse momentum in Pb–Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 and 2.76 TeV
[CERN-EP-2020-186; arXiv:2011.05718]
Measurements of the production of muons from heavy-flavour hadron decays in Pb–Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 and 2.76 TeV using the ALICE detector at the LHC are reported. The nuclear modification factor $R_{AA}$ at $\sqrt{s_{\rm NN}}$ = 5.02 TeV is measured at forward rapidity (2.5 < y < 4) as a function of transverse momentum $p_T$ in central, semi-central, and peripheral collisions over a wide $p_T$ interval, 3 < $p_T$ <20 GeV/c, in which muons from beauty-hadron decays are expected to take over from charm as the dominant source at high $p_T$ ($p_T$ > 7 GeV/c). [...]
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2022-01-17
14:07
OpenAccess [GSI-2022-00106] Journal Article
; ; ; et al
Energy dependence of $\phi $ meson production at forward rapidity in pp collisions at the LHC
[CERN-EP-2021-057; arXiv:2105.00713]
The production of $\phi $ mesons has been studied in pp collisions at LHC energies with the ALICE detector via the dimuon decay channel in the rapidity region $2.5< y < 4$. Measurements of the differential cross section $\mathrm{d}^2\sigma /\mathrm{d}y \mathrm{d}p_{\mathrm {T}}$ are presented as a function of the transverse momentum ($p_{\mathrm {T}}$) at the center-of-mass energies $\sqrt{s}=5.02$, 8 and 13 TeV and compared with the ALICE results at midrapidity. [...]
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2022-01-17
14:03
OpenAccess [GSI-2022-00105] Journal Article
; ; ; et al
Inclusive heavy-flavour production at central and forward rapidity in Xe–Xe collisions at $\sqrt{s_{\rm NN}}$ = 5.44 TeV
[CERN-EP-2020-208; arXiv:2011.06970]
The first measurements of the production of muons and electrons from heavy-flavour hadron decays in Xe–Xe collisions at $\sqrt{s_{\rm NN}}$ = 5.44 TeV, using the ALICE detector at the LHC, are reported. The measurement of the nuclear modification factor $R_{AA}$ is performed as a function of transverse momentum $p_T$ in several centrality classes at forward rapidity (2.5 < y < 4) and midrapidity (|y| < 0.8) for muons and electrons from heavy-flavour hadron decays, respectively. [...]
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2022-01-17
13:58
OpenAccess [GSI-2022-00104] Journal Article
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Jet-associated deuteron production in pp collisions at $\sqrt{s}$ = 13 TeV
[CERN-EP-2020-210; arXiv:2011.05898]
Deuteron production in high-energy collisions is sensitive to the space–time evolution of the collision system, and is typically described by a coalescence mechanism. For the first time, we present results on jet-associated deuteron production in pp collisions at $\sqrt{s}$ = 13 TeV, providing an opportunity to test the established picture for deuteron production in events with a hard scattering. [...]
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2022-01-17
13:54
OpenAccess [GSI-2022-00103] Journal Article
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Multiharmonic Correlations of Different Flow Amplitudes in Pb-Pb Collisions at $\sqrt{s_{_{NN}}}=2.76$ TeV
[CERN-EP-2021-005; arXiv:2101.02579]
The event-by-event correlations between three flow amplitudes are measured for the first time in Pb-Pb collisions, using higher-order symmetric cumulants. We find that different three-harmonic correlations develop during the collective evolution of the medium when compared to correlations that exist in the initial state. [...]
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