# ALICE Conference Contributions

უკანასკნელი დამატებები:
2019-04-18
06:26
 Characterization of ALPIDE Monolithic Active Pixel Sensor for the ALICE Inner Tracking System Upgrade Using the PS Facility at CERN / Kushpil, S (Rez, Nucl. Phys. Inst.) /ALICE The upgrade of the Inner Tracking System (ITS), which is currently being developed by the ALICE Collaboration, aims at significantly improving the vertex and tracking resolution as well as the readout rate capabilities of the ALICE experiment at CERN. The new ITS detector will be installed during the second long LHC shutdown (LS2) in 2019-2020. [...] 2018 - 4 p. - Published in : 10.1109/NSSMIC.2017.8532940 In : 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2017), Atlanta, Georgia, USA, 21 - 28 Oct 2017, pp.8532940

2019-04-18
06:26
 Nuclear modification factor and elliptic flow of open heavy flavours in Pb--Pb collisions with ALICE at the LHC / Zhang, Xiaoming (Hua-Zhong Normal U.) /ALICE The latest results on the nuclear modification factor ($R_{\rm AA}$) and the elliptic flow ($v_{2}$) of D mesons and heavy-flavour hadron decay leptons in Pb--Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ and $2.76$ TeV measured with ALICE are presented for different centrality classes. The results, obtained in a wide transverse momentum ($p_{\rm T}$) range and in different rapidity regions, provide further information on the properties of the medium.A suppression of a factor of about $3$--$4$ of production yields relative to pp collisions and a positive $v_{2}$ for open heavy-flavour particles are observed in $p_{\rm T}>5$ GeV/$c$ in most central collisions and in intermediate $p_{\rm T}$ region in semi-central collisions, respectively. [...] SISSA, 2018 - 8 p. - Published in : PoS EPS-HEP2017 (2017) 203 Fulltext: PDF; External link: PoS server In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.203

2019-04-18
06:26
 Measurements of jets in ALICE / Nattrass, Christine (Tennessee U.) /ALICE High energy collisions of heavy nuclei permit the study of nuclear matter at high temperatures and energy densities. Under these conditions the fundamental theory for strong interactions, QCD, predicts a phase transition to a plasma of quarks and gluons. [...] SISSA, 2018 - 5 p. - Published in : PoS EPS-HEP2017 (2017) 177 Fulltext: PDF; External link: PoS server In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.177

2019-04-16
09:15
 Recent results on (anti-)(hyper-)nuclei production in pp, p-Pb and Pb-Pb collisions with ALICE / Trogolo, Stefano (INFN, Turin ; Turin U.) /ALICE The ALICE Collaboration has collected a large data sample of Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV in 2015 at the Large Hadron Collider (LHC), which is complementary to that at $\sqrt{s_{\rm{NN}}}$ = 2.76 TeV from Run 1. In these collisions, a great variety of (anti-)(hyper-)nuclei is produced, namely deuteron, triton, $^3$He, $^4$He, hypertriton ($^3_{\Lambda}$H) and their antiparticles. [...] SISSA, 2018 - 6 p. - Published in : PoS EPS-HEP2017 (2017) 200 Fulltext: PDF; External link: PoS server In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.200

2019-04-16
09:15
 Open heavy-flavour production in p-Pb collisions measured with ALICE at the LHC / Terrevoli, Cristina (INFN, Padua ; Padua U.) /ALICE Heavy flavours are sensitive probes of the hot and dense quark-gluon plasma formed in high-energy nucleus-nucleus collisions. Measurements of their production in p--Pb collisions are crucial for the interpretation of heavy-ion results, because they allow to investigate the cold nuclear matter effects.In addition, the study of heavy-flavour $p_{\rm T}$ modification in high-multiplicity p--Pb collisions could give insight into the possible presence of collective effects.The measurements of open heavy-flavour production performed with ALICE at the LHC in p--Pb collisions at$\sqrt{s_{\rm{NN}}}$= 5.02 TeV are presented [...] SISSA, 2018 - 6 p. - Published in : PoS EPS-HEP2017 (2017) 199 Fulltext: PDF; External link: PoS server In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.199

2019-04-16
09:15
 Strangeness production in Pb-Pb collisions with ALICE at the LHC / Kalinak, Peter (Kosice, IEF) /ALICE We present new ALICE results on the production of strange and multi-strange hadrons in Pb--Pb collisions at the top LHC energy of $\sqrt{s_{\rm NN}}$ = 5.02 TeV.Strangeness production measurements are powerful tools for the study of the thermal properties of the deconfined state of QCD matter, the Quark-Gluon Plasma.Thanks to its unique tracking and PID capabilities, ALICE is able to measure weakly decaying particles through the topological reconstruction of the identified hadron decay products.Transverse momentum spectra of $\mathrm{K}^{0}_{S}$, $\Lambda$, $\Xi$ and $\Omega$ at central rapidity are presented as function of the collision centrality.The so-called baryon anomaly in the ratio $\Lambda$/$\mathrm{K}^{0}_{S}$ is examined to probe particle production mechanisms: the position of the peak is sensitive to recombination proces ses, the high-$p_{\rm T}$ part can provide revealing insights on fragmentation and, finally, the steepness of the rising trend featuring for $p_{\rm T} \lesssim$ 2 GeV/$c$ can be connected to the hydrodynamic expansion of the system.In order to study strangeness enhancement, hyperon yields are normalised to the measurements of pion production in the corresponding centrality classes.Comparisons to lower energy results as well as to different collision systems will be shown. This offers a complete experimental picture that is used as a benchmark for commonly adopted phenomenological models, such as the thermal statistical hadronisation approach.. SISSA, 2018 - 7 p. - Published in : PoS EPS-HEP2017 (2017) 168 Fulltext: PDF; External link: PoS server In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.168

2019-04-16
09:15
 Quarkonium production in nucleus-nucleus collisions with ALICE at the LHC / Das, Indranil (Saha Inst.) /ALICE Quarkonium studies provide an important insight about theproperties of the medium created in high-energy heavy-ion collisions. The ALICE charmonium and bottomonium measurements in nucleus-nucleus collisions, from the LHC Run II data collection, are discussed.. SISSA, 2018 - 6 p. - Published in : PoS EPS-HEP2017 (2017) 160 Fulltext: PDF; External link: PoS server In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.160

2019-04-13
06:00
 Low mass dielectron measurements in pp, p-Pb, and Pb-Pb collisions with ALICE at the LHC / Bailhache, Raphaelle (Frankfurt U.) /ALICE In ultra-relativistic heavy-ion collisions, correlated dielectron pairs are of particular interest since they are produced at all stages of the reaction and leave the dense medium without final state interactions. Therefore, the measurement of low mass dielectrons provides information on the properties of the hot and dense medium created in such collisions. [...] SISSA, 2018 - 6 p. - Published in : PoS EPS-HEP2017 (2017) 153 Fulltext: PDF; External link: PoS server In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.153

2019-04-09
06:05
 ALICE forward rapidity upgrades / Slupecki, Maciej (Jyvaskyla U.) /ALICE Two forward rapidity upgrades of ALICE apparatus at the LHC are presented: the Muon Forward Tracker and the Fast Interaction Trigger. Their designs are driven by physics performance studies, which have been done using MC simulations. [...] SISSA, 2018 - 6 p. - Published in : PoS EPS-HEP2017 (2017) 519 Fulltext: PDF; External link: PoS server In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.519

2019-04-09
06:05
 The ALICE ITS upgrade / Camerini, Paolo (INFN, Trieste ; Trieste U.) /ALICE A major upgrade of the Inner Tracking System (ITS) of the ALICE experiment at LHC is currently under preparation with the aim of exploiting the increased Pb-Pb luminosity expected during Run 3 and Run 4 after 2020, which will enable to make a detailed study of the properties of the Quark-Gluon Plasma. The new ITS, which will be installed during the Long Shutdown 2 (2019-2020), will increase the readout rate capability by more than two orders of magnitude while, at the same time, improving the tracking capability and the impact parameter resolution, especially at low transverse momentum.The new ultra-light tracker will be constructed with Monolithic Active Pixel Sensors to instrument the ~10 m2 ITS active surface, arranged on seven layers, with the inner layer as close as 23 mm from the interaction point.The CMOS chip (ALPIDE) which will equip the ITS is built in the TowerJazz 180 nm -CMOS imaging sensor process and has been custom designed to fulfil the stringent requirements of the new tracker.The chip R&D; phase finished in 2016 with the development of a chip whose performances fulfil and often exceed the project requirements. [...] SISSA, 2018 - 5 p. - Published in : PoS EPS-HEP2017 (2017) 487 Fulltext: PDF; External link: PoS server In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.487