CERN Accelerating science

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1.
ALICE HLT high speed tracking on GPU / for the ALICE Collaboration
The on-line event reconstruction in ALICE is performed by the High Level Trigger, which should process up to 2000 events per second in proton-proton collisions and up to 300 central events per second in heavy-ion collisions, corresponding to an inp ut data stream of 30 GB/s. In order to fulfill the time requirements, a fast on-line tracker has been developed. [...]
2011 - Published in : IEEE Trans. Nucl. Sci. 58 (2011) 1845-1851
In : 17th IEEE NPSS Real Time Conference, Lisbon, Portugal, 24 - 28 May 2010, pp.1845-1851
2.
Event reconstruction performance of the ALICE High Level Trigger for p + p collisions / for the ALICE collaboration
The ALICE High Level Trigger comprises a large computing cluster, dedicated interfaces and software applications. It allows on-line event reconstruction of the full data stream of the ALICE experiment at up to 25 GByte/s. [...]
2011 - Published in : IEEE Trans. Nucl. Sci. 58 (2011) 1706-1713

In : 17th IEEE NPSS Real Time Conference, Lisbon, Portugal, 24 - 28 May 2010, pp.1706-1713
3.
Inclusive J/$\psi$ production in pp collisions at $\sqrt{s}$ = 2.76 TeV / ALICE Collaboration
The ALICE Collaboration has measured inclusive J/psi production in pp collisions at a center of mass energy sqrt(s)=2.76 TeV at the LHC. The results presented in this Letter refer to the rapidity ranges |y|<0.9 and 2.5<y<4 and have been obtained by measuring the electron and muon pair decay channels, respectively. [...]
arXiv:1203.3641; CERN-PH-EP-2012-055; CERN-PH-EP-2012-055; CERN-PH-EP-2012-055.- Geneva : CERN, 2012-12-05 - 12 p. Article from SCOAP3: PDF; Draft (restricted): PDF; Elsevier Open Access article: PDF; Fulltext: 1203.3641 - PDF; arXiv:1203.3641 - PDF; External link: Preprint
4.
J/$\psi$ Production as a Function of Charged Particle Multiplicity in pp Collisions at $\sqrt{s}$ = 7 TeV / ALICE Collaboration
The ALICE collaboration reports the measurement of the inclusive J/psi yield as a function of charged particle pseudorapidity density dN_{ch}/deta in pp collisions at sqrt{s} = 7 TeV at the LHC. J/psi particles are detected for p_t > 0, in the rapidity interval |y| < 0.9 via decay into e+e-, and in the interval 2.5 < y < 4.0 via decay into mu+mu- pairs. [...]
arXiv:1202.2816; CERN-PH-EP-2012-021.- Geneva : CERN, 2013-07-16 - 11 p. - Published in : Phys. Lett. B 712 (2012) 165-175 Draft (restricted): PDF; Elsevier Open Access article : PDF; Fulltext: PDF; External link: Preprint
5.
Neutral pion and $\eta$ meson production in proton-proton collisions at $\sqrt{s}$=0.9 TeV and $\sqrt{s}$=7 TeV / ALICE Collaboration
The first measurements of the invariant differential cross sections of inclusive $\pi^0$ and $\eta$ meson production at mid-rapidity in proton-proton collisions at $\sqrt{s}=0.9$ TeV and $\sqrt{s}=7$ TeV are reported. The $\pi^0$ measurement covers the ranges $0.4<p_T<7$ GeV/$c$ and $0.3<p_T<25$ GeV/$c$ for these two energies, respectively. [...]
arXiv:1205.5724; CERN-PH-EP-2012-001; CERN-PH-EP-2012-001.- Geneva : CERN, 2013-07-16 - 11 p. - Published in : Phys. Lett. B 717 (2012) 162-172 Draft (restricted): PDF; Elsevier Open Access article : PDF; Fulltext: arXiv:1205.5724 - PDF; CERN-PH-EP-2012-001 - PDF; External link: Rivet analyses reference
6.
Light vector meson production in pp collisions at $\sqrt{s}$ = 7 TeV / ALICE Collaboration
The ALICE experiment has measured low-mass dimuon production in pp collisions at $\sqrt{s}$ = 7 TeV in the dimuon rapidity region 2.5 < y < 4. The observed dimuon mass spectrum is described as a superposition of resonance decays ($\eta, \rho, \omega, \eta^{'}, \phi$) into muons and semi-leptonic decays of charmed mesons. [...]
arXiv:1112.2222; CERN-PH-EP-2011-196; CERN-PH-EP-2011-196.- Geneva : CERN, 2013-07-16 - 12 p. - Published in : Phys. Lett. B 710 (2012) 557-568 Draft (restricted): PDF; Elsevier Open Access article: PDF; Fulltext: CERN-PH-EP-2011-196 - PDF; arXiv:1112.2222 - PDF; External link: DURHAM
7.
Measurement of charm production at central rapidity in proton-proton collisions at $\sqrt{s}$ = 7 TeV / ALICE Collaboration
The pt-differential inclusive production cross sections of the prompt charmed mesons D0, D+, and D*+ in the rapidity range |y|<0.5 were measured in proton-proton collisions at sqrt(s) = 7 TeV at the LHC using the ALICE detector. Reconstructing the decays D0->K-pi+, D+->K-pi+pi+, D*+->D0pi+, and their charge conjugates, about 8,400 D0, 2,900 D+, and 2,600 D*+ mesons with 1<pt<24 GeV/c were counted, after selection cuts, in a data sample of 3.14x10^8 events collected with a minimum-bias trigger (integrated luminosity L_int = 5/nb). [...]
arXiv:1111.1553; CERN-PH-EP-2011-181; CERN-PH-EP-2011-181.- Geneva : CERN, 2012 - 24 p. - Published in : JHEP 01 (2012) 128 Fulltext: PDF; Springer Open Access article: PDF; External link: DURHAM
8.
Particle-yield modification in jet-like azimuthal dihadron correlations in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV / ALICE Collaboration
The yield of charged particles associated with high-pT trigger particles (8 < pT < 15 GeV/c) is measured with the ALICE detector in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV relative to proton-proton collisions at the same energy. The conditional per-trigger yields are extracted from the narrow jet-like correlation peaks in azimuthal di-hadron correlations. [...]
arXiv:1110.0121; CERN-PH-EP-2011-161; CERN-PH-EP-2011-161.- Geneva : CERN, 2012 - 15 p. - Published in : Phys. Rev. Lett. 108 (2012) 092301 APS Open Access article: PDF; Draft (restricted): PDF; Fulltext: PDF; External link: Rivet analyses reference
9.
Harmonic decomposition of two-particle angular correlations in Pb-Pb collisions at $\mathbf{\sqrt{s_{\rm NN}} = 2.76}$ TeV / ALICE Collaboration
Angular correlations between unidentified charged trigger ($t$) and associated ($a$) particles are measured by the ALICE experiment in \PbPb\ collisions at $\sqrt{s_{nn}}$=2.76 TeV for transverse momenta $0.25 < p_{T}^{t,\, a} < 15$ GeV/$c$, where $p_{T}^t > p_{T}^a$. The shapes of the pair correlation distributions are studied in a variety of collision centrality classes between 0 and 50% of the total hadronic cross section for particles in the pseudorapidity interval $|\eta| < 1.0$. [...]
arXiv:1109.2501; CERN-PH-EP-2011-152; CERN-PH-EP-2011-152.- 2013-07-16 - 16 p. - Published in : Phys. Lett. B 708 (2012) 249-264 Elsevier Open Access article: PDF; Fulltext: PDF; External link: DURHAM
10.
Higher harmonic anisotropic flow measurements of charged particles in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV / ALICE Collaboration
We report on the first measurement of the triangular v3, quadrangular v4, and pentagonal v5 charged particle flow in Pb-Pb collisions at 2.76 TeV measured with the ALICE detector at the CERN Large Hadron Collider. We show that the triangular flow can be described in terms of the initial spatial anisotropy and its fluctuations, which provides strong constraints on its origin. [...]
arXiv:1105.3865; CERN-PH-EP-2011-073; CERN-PH-EP-2011-073.- 2011 - 10 p. - Published in : Phys. Rev. Lett. 107 (2011) 032301 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint

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