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Now showing items 201-300 of 429
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Event-by-event fluctuations of conserved charges – such as electric charge, strangeness, and baryon number – in ultrarelativistic heavy-ion collisions provide insight into the properties of the quark-gluon plasma and the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
ALICE is the experiment specifically designed to study the Quark-Gluon Plasma (QGP) in heavy-ion collisions at the CERN LHC. The ALICE detector will be upgraded during the Long Shutdown 2, planned for 2019-2020, in order ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Femtoscopic correlations between charged pions and kaons for different charge combinations are measured in Pb−Pb collisions at √ sNN = 2.76 TeV with ALICE at the LHC. The three-dimensional pion-kaon (π − K) correlation ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
We present recent results on strange and non-strange D-meson production measured with ALICE in Pb–Pb collisions at the LHC. In addition, the measurements of the Λ+ c -baryon production and of the Λ+ c /D0 ratio in pp, p–Pb, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
The measurement of the production of prompt D0 , D+, D∗+, and D+ s mesons in proton–lead (p–Pb) collisions at the centre-of-mass energy per nucleon pair of √ sNN = 5.02 TeV, with an integrated luminosity of 292 ± 11 µb −1 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
We present new results on transverse momentum spectra, integrated yields, and mean transverse momenta of pions, kaons, and protons, as well as of ϕ-mesons for various centrality classes measured in Pb–Pb and Xe–Xe collisions ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
ALICE has measured quarkonium production in p-Pb collisions at backward (−4.46 < ycms < −2.96), mid (−1.37 < ycms < 0.43) and forward (2.03 < ycms < 3.53) rapidity (y) regions down to zero transverse momentum (pT). The ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
We present new measurements related to spin alignment of K∗0 vector mesons at mid-rapidity for Pb–Pb collisions at √sNN = 2.76 and 5.02 TeV. The spin alignment measurements are carried out with respect to production plane ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Results on the production of stable light nuclei, including deuterons,3He,4He and the corresponding anti-nuclei, inPb–Pb collisions at√sNN=2.76 TeV and√sNN=5.02 TeV are presented and compared with theoretical predictionsand ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
In this work, the latest heavy-flavour correlation and jet measurements at mid-rapidity with the ALICE detector in pp, p–Pb and Pb–Pb collisions from the LHC Run 2 are reported. In particular, the results of azimuthal ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Heavy quarks, i.e. charm and beauty, are sensitive probes of the medium produced in high-energy heavy-ion collisions. They are produced in the early stage of the collision, mainly in hard partonic scattering processes, and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Inclusive J/ψ production is studied in minimum-bias proton-proton collisions at a centre-of-mass energy of s√ = 5.02 TeV by ALICE at the CERN LHC. The measurement is performed at mid-rapidity (|y| < 0.9) in the dielectron ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Hadronic resonances are unique tools to investigate the interplay of re-scattering and regeneration effects during the hadronization phase in heavy-ion collisions. Measurements in small collision systems provide a necessary ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
Particle production at LHC energies involves the interplay of hard (perturbative) and soft (non-perturbative) QCD processes. Global observables, such as the charged-particle multiplicity, are related to the initial geometry ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
An invariant differential cross section measurement of inclusive π0 and η meson production at mid-rapidity in pp collisions at √s = 8 TeV was carried out by the ALICE experiment at the LHC. The spectra of π0 and η mesons ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
First results on the longitudinal asymmetry and its effect on the pseudorapidity distributions in Pb–Pb collisions at √sNN = 2.76 TeV at the Large Hadron Collider are obtained with the ALICE detector. The longitudinal ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
In ultrarelativistic heavy-ion collisions, the event-by-event variation of the elliptic flow v2 reflects fluctuations in the shape of the initial state of the system. This allows to select events with the same centrality ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Invariant differential yields of deuterons and antideuterons in pp collisions at √ s = 0.9, 2.76 and 7 TeV and the yields of tritons, 3He nuclei, and their antinuclei at √ s = 7 TeV have been measured with the ALICE ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
We report measurements of the inclusive J/ψ yield and average transverse momentum as a function of charged-particle pseudorapidity density dNch/dη in p–Pb collisions at √sNN = 5.02 TeV with ALICE at the LHC. The observables ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The production of Z0 bosons at large rapidities in Pb–Pb collisions at √sNN = 5.02 TeV is reported. Z0 candidates are reconstructed in the dimuon decay channel (Z0 → μ+ μ−), based on muons selected with pseudo-rapidity ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The pT-differential production cross section of prompt Λ+ c charmed baryons was measured with the ALICE detector at the Large Hadron Collider (LHC) in pp collisions at √ s = 7 TeV and in p-Pb collisions at √ sNN = 5.02 TeV ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The first measurements of anisotropic flow coefficients vn for mid-rapidity charged particles in Xe– Xe collisions at √sNN = 5.44 TeV are presented. Comparing these measurements to those from Pb–Pb collisions at √sNN = ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high-transverse momentum trigger hadron in p–Pb collisions at √sNN = 5.02 TeV. Jets are reconstructed ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
A measurement of beauty hadron production at mid-rapidity in proton-lead collisions at a nucleon–nucleon centre-of-mass energy √sNN = 5.02 TeV is presented. The semi-inclusive decay channel of beauty hadrons into J/ψ is ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The correlations between event-by-event fluctuations of anisotropic flow harmonic amplitudes have been measured in Pb-Pb collisions at √ s NN = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The results ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The elliptic (v2), triangular (v3), and quadrangular (v4) flow coefficients of π ±, K±, p + p, Λ + Λ, K0 S , and the φ-meson are measured in Pb-Pb collisions at √ sNN = 5.02 TeV. Results obtained with the scalar product ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
We present a measurement of azimuthal correlations between inclusive J/ψ and charged hadrons in p–Pb collisions recorded with the ALICE detector at the CERN LHC. The J/ψ are reconstructed at forward (pgoing, 2.03 < y < ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
This letter presents the first measurement of jet mass in Pb–Pb and p–Pb collisions at √sNN = 2.76 TeV and √sNN = 5.02 TeV, respectively. Both the jet energy and the jet mass are expected to be sensitive to jet quenching ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Inclusive J/ψ production is studied in Xe–Xe interactions at a centre-of-mass energy per nucleon pair of √sNN = 5.44 TeV, using the ALICE detector at the CERN LHC. The J/ψ meson is reconstructed via its decay into a muon ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Azimuthally-differential femtoscopic measurements, being sensitive to spatio-temporal characteristics of the source as well as to the collective velocity fields at freeze out, provide very important information on the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The first measurement of e+e− pair production at mid-rapidity (|ηe| < 0.8) in pp collisions at s√=7 TeV with ALICE at the LHC is presented. The dielectron production is studied as a function of the invariant mass (mee < ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Results on the production of 4He and 4He nuclei in Pb–Pb collisions at √sNN = 2.76 TeV in the rapidity range | y |< 1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0–10% ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Medium modification of the shape of small-radius jets in central Pb-Pb collisions at √sN-N-=2.76 TeV
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
φ meson measurements provide insight into strangeness production, which is one of the key observables for the hot medium formed in high-energy heavy-ion collisions. ALICE measured φ production through its decay in muon ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Neutral pion and η meson invariant differential yields were measured in non-single diffractive p–Pb collisions at √sNN = 5.02 TeV with the ALICE experiment at the CERN LHC. The analysis combines results from three complementary ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Inclusive J/ψ production is studied in p–Pb interactions at a centre-of-mass energy per nucleon-nucleon collision √ sNN = 8.16 TeV, using the ALICE detector at the CERN LHC. The J/ψ meson is reconstructed, via its decay ...
Energy dependence and fluctuations of anisotropic flow in Pb-Pb collisions at √sNN=5.02 and 2.76 TeV
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
Measurements of anisotropic flow coefficients with two- and multi-particle cumulants for inclusive charged particles in Pb–Pb collisions at √ sNN = 5.02 and 2.76 TeV are reported in the pseudorapidity range |η| < 0.8 and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
We report on the measurement of the inclusive J/ψ polarization parameters in pp collisions at a center of mass energy √s = 8 TeV with the ALICE detector at the LHC. The analysis is based on a data sample corresponding to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The production of the charm-strange baryon 0 c is measured for the first time at the LHC via its semileptonic decay into e+−νe in pp collisions at √s = 7 TeV with the ALICE detector. The transverse momentum (pT) differential ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The Transition Radiation Detector (TRD) was designed and built to enhance the capabilities of the ALICE detector at the Large Hadron Collider (LHC). While aimed at providing electron identification and triggering, the TRD ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Ultra-peripheral Pb-Pb collisions, in which the two nuclei pass close to each other, but at an impact parameter greater than the sum of their radii, provide information about the initial state of nuclei. In particular, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The ALICE Collaboration and the ALICE O2 project have carried out detailed studies for a new online computing facility planned to be deployed for Run 3 of the Large Hadron Collider (LHC) at CERN. Some of the main aspects ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
A detailed study of pseudorapidity densities and multiplicity distributions of primary charged particles produced in proton–proton collisions, at s√= 0.9, 2.36, 2.76, 7 and 8 TeV, in the pseudorapidity range |η|<2, was ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
We present the results of three-dimensional femtoscopic analyses for charged and neutral kaons recorded by ALICE in Pb-Pb collisions at √ s NN = 2.76 TeV. Femtoscopy is used to measure the space-time characteristics of ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Highlights of recent results from the ALICE collaboration are presented. The collision systems investigated are Pb–Pb, p–Pb, and pp, and results from studies of bulk particle production, azimuthal correlations, open and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
ALICE measured the nuclear modification factor (RAA) and elliptic flow (v2) of D mesons (D0, D+, D∗+ and D+ s ) in semi-central Pb–Pb collisions at √sNN = 5.02 TeV. The increased amount of data in semi-central Pb–Pb events ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The transverse momentum ( pT ) spectra and elliptic flow coefficient ( v2 ) of deuterons and anti-deuterons at mid-rapidity ( |y|<0.5 ) are measured with the ALICE detector at the LHC in Pb–Pb collisions at sNN−−−√ ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The production cross sections for prompt charmed mesons D0, D+, D∗+ and D+s were measured at mid-rapidity in proton–proton collisions at a centre-of-mass energy s√=7 TeV with the ALICE detector at the Large Hadron Collider ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The production of K∗ ( 892 ) 0 and ϕ ( 1020 ) mesons in proton-proton ( p p ) and lead-lead (Pb-Pb) collisions at √ s NN = 2.76 TeV has been analyzed using a high luminosity data sample accumulated in 2011 with the ALICE ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Two-particle angular correlations were measured in pp collisions at s√=7 TeV for pions, kaons, protons, and lambdas, for all particle/anti-particle combinations in the pair. Data for mesons exhibit an expected peak ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Azimuthally differential femtoscopic measurements, being sensitive to spatio-temporal characteristics of the source as well as to the collective velocity fields at freeze-out, provide very important information on the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The measurement of azimuthal correlations of charged particles is presented for Pb-Pb collisions at sNN−−−√=2.76 TeV and p-Pb collisions at sNN−−−√=5.02 TeV with the ALICE detector at the CERN Large Hadron Collider. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
In ultra relativistic heavy-ion collisions at the Large Hadron Collider (LHC), conditions are met to produce a hot, denseand strongly interacting medium known as the Quark Gluon Plasma (QGP). Quarks and gluons from incoming ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
We present the first ever measurements of femtoscopic correlations between the K0 S and K± particles. The analysis was performed on the data from Pb–Pb collisions at √sNN = 2.76 TeV measured by the ALICE experiment. The ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The production of muons from heavy-flavour hadron decays in p–Pb collisions at was studied for GeV/c with the ALICE detector at the CERN LHC. The measurement was performed at forward (p-going direction) and backward ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
We present the charged-particle pseudorapidity density in Pb–Pb collisions at sNN=5.02TeV in centrality classes measured by ALICE. The measurement covers a wide pseudorapidity range from −3.5 to 5, which is sufficient for ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The transverse momentum distributions of the strange and double-strange hyperon resonances ((1385)±, (1530)0) produced in p–Pb collisions at √sNN = 5.02 TeV were measured in the rapidity range −0.5 < yCMS < 0 for event ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The azimuthal correlations of D mesons with charged particles were measured with the ALICE apparatus in pp collisions at s√=7 TeVs=7 TeV and p–Pb collisions at sNN−−−√=5.02 TeVsNN=5.02 TeV at the Large Hadron Collider. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
We present the first measurement of the two-particle transverse momentum differential correlation function, P2≡ ⟨ Δ p T Δ p T ⟩ / ⟨ p T ⟩ 2 , in Pb-Pb collisions at √ s N N = 2.76 TeV . Results for P2 are reported as ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark–gluon plasma (QGP)1. Such an exotic state of strongly interacting ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Among the probes used to investigate the properties of the Quark-Gluon Plasma, the measurement of the energy loss of high-energy partons can be used to put constraints on energy-loss models and to ultimately access medium ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The second and the third order anisotropic flow, V2 and V3, are determined by the corresponding initial spatial anisotropy coefficients, ε2 and ε3, in the initial density distribution. On the contrary, the higher order ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
We present the ALICE results on the nuclear modification factor and elliptic flow of electrons and muons from open heavy-flavour hadron decays at mid-rapidity and forward rapidity in Pb–Pb collisions at √sNN = 2.76 and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Particle identification is an important feature of the ALICE detector at the LHC. In particular, for particle identification via the time-of-flight technique, the precise determination of the event collision time represents ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
We present the charged-particle pseudorapidity density in pp, p–Pb, and Pb–Pb collisions at √sNN = 5.02 TeV over a broad pseudorapidity range. The distributions are determined using the same experimental apparatus and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The availability at the LHC of the largest collision energy in pp collisions allows a significant advance in the measurement of J/ψ production as function of event multiplicity. The interesting relative increase observed ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
We present the charged-particle multiplicity distributions over a wide pseudorapidity range ( −3.4<η<5.0 ) for pp collisions at s√=0.9,7 , and 8 TeV at the LHC. Results are based on information from the Silicon Pixel ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
Direct photon production in heavy-ion collisions provides a valuable set of observables to study the hot QCD medium. The direct photons are produced at different stages of the collision and escape the medium unaffected. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The study of identified particle production as a function of transverse momentum (pT) and event multiplicity in protonproton (pp) collisions at different center-of-mass energies (√s) is a key tool for understanding ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The characterisation of the jet substructure can give insight into the microscopic nature of the modification inducedon high-momentum partons by the Quark-Gluon Plasma that is formed in ultra-relativistic heavy-ion collisions. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
The W and Z boson production was measured via the muonic decay channel in proton-lead collisions at sNN−−−√=5.02 TeV at the Large Hadron Collider with the ALICE detector. The measurement covers backward (−4.46 < y cms ...