CERN Accelerating science

CERN Document Server Sök i 548 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.64 sekunder. 
1.
Development of a novel compact and fast SiPM-based RICH detector for the future ALICE 3 PID system at LHC / Mazziotta, M N (INFN, Bari) ; Altamura, A R (INFN, Bari) ; Congedo, L (INFN, Bari) ; De Robertis, G (INFN, Bari) ; Di Mauro, A (CERN) ; Guerra-Pulido, J O (Mexico U., ICN) ; Licciulli, F (INFN, Bari) ; Lorusso, L (INFN, Bari ; Bari Polytechnic) ; Martinengo, P (CERN) ; Nappi, E (INFN, Bari) et al.
A dedicated R&D; is ongoing for the charged particle identification system of the ALICE 3 experiment proposed for the LHC Run 5 and beyond.One of the subsystems for the high-energy charged particle identification will be a Ring-Imaging Cherenkov (RICH) detector.The possibility of integrating Cherenkov-based charged particle timing measurements is currently under study.The proposed system is based on a proximity-focusing RICH configuration including an aerogel radiator separated from a SiPM array layer by an expansion gap. A thin high-refractive index window of transparent material, acting as a second Cherenkov radiator, is glued on the SiPM array to enable time-of-flight measurements of charged particles by exploiting the yield of Cherenkov photons in the thin window.We assembled a small-scale prototype instrumented with different Hamamatsu SiPM array sensors with pitches ranging from 1 to 3 mm, readout by custom boards equipped with the front-end Petiroc 2A ASICs to measure charges and times.The primary Cherenkov radiator consisted of a 2 cm thick aerogel tile, while various window materials, including SiO2 and MgF2, were used as secondary Cherenkov radiators.The prototype was successfully tested in a campaign at the CERN PS T10 beam line with pions and protons. [...]
2025 - 8 p. - Published in : JINST
Fulltext: PDF;
In : 25th international Workshop on Radiation Imaging Detectors (iWoRiD2024), Lisbon, Portugal, 30 Jun - 4 Jul 2024, pp.C01001
2.
First measurement of symmetric cumulants of hexagonal flow harmonics in Pb-Pb collisions at sNN = 5.02 TeV / Acharya, Shreyasi (INFN, Bari) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) et al.
Correlations between event-by-event fluctuations of anisotropic flow harmonics are measured in Pb-Pb collisions at a center-of-mass energy per nucleon pair of 5.02~TeV, as recorded by the ALICE detector at the LHC. This study presents correlations up to the hexagonal flow harmonic, v6, which was measured for the first time. [...]
arXiv:2412.15873; CERN-EP-2024-344.- Geneva : CERN, 2024 - 21 p. Draft (restricted): PDF; Fulltext: PDF;
3.
Light neutral-meson production in pp collisions at s = 13 TeV / Acharya, Shreyasi (Clermont-Ferrand U.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) et al.
The momentum-differential invariant cross~sections of π0 and η mesons are reported for pp collisions at s=13 TeV at midrapidity (|y|<0.8). The measurement is performed in a broad transverse-momentum range of 0.2<pT<200 GeV/c and 0.4<pT<60 GeV/c for the π0 and η, respectively, extending the pT coverage of previous measurements. [...]
arXiv:2411.09560; CERN-EP-2024-304.- Geneva : CERN, 2024 - 39 p. Draft (restricted): PDF; Fulltext: PDF;
4.
Measurement of ω meson production in pp collisions at s = 13 TeV / Acharya, Shreyasi (Clermont-Ferrand U.) ; Adamova, Dagmar (Rez, Nucl. Phys. Inst.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) et al.
The pT-differential cross section of ω meson production in pp collisions at s = 13 TeV at midrapidity (|y|<0.5) was measured with the ALICE detector at the LHC, covering an unprecedented transverse-momentum range of 1.6<pT<50 GeV/c. The meson is reconstructed via the ωπ+ππ0 decay channel. [...]
arXiv:2411.09432; CERN-EP-2024-303.- Geneva : CERN, 2024 - 26 p. Draft (restricted): PDF; Fulltext: PDF;
5.
Studying charm hadronisation into baryons with azimuthal correlations of Λ+c with charged particles in pp collisions at s = 13 TeV / Acharya, Shreyasi (Clermont-Ferrand U.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) et al.
The distribution of angular correlations between prompt charm hadrons and primary charged particles in pp collisions is sensitive to the charm-quark hadronisation process. In this letter, charm-baryon correlations are measured for the first time by studying the azimuthal-angle difference between charged particles and prompt Λ+c baryons produced in pp collisions at a centre-of-mass energy s=13 TeV, with the ALICE detector. [...]
arXiv:2411.10104; CERN-EP-2024-302.- Geneva : CERN, 2024 - 28 p. Draft (restricted): PDF; Fulltext: PDF;
6.
Observation of partonic flow in proton–proton and proton–nucleus collisions / Acharya, Shreyasi (Clermont-Ferrand U.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) et al. /ALICE
Quantum Chromodynamics predicts a phase transition from ordinary hadronic matter to the quark–gluon plasma (QGP) at high temperatures and energy densities, where quarks and gluons (partons) are not confined within hadrons. The QGP is generated in ultrarelativistic heavy-ion collisions. [...]
arXiv:2411.09323; CERN-EP-2024-299.- Geneva : CERN, 2024 - 22 p. Draft (restricted): PDF; Fulltext: PDF;
7.
System size and energy dependence of the mean transverse momentum fluctuations at the LHC / Acharya, Shreyasi (Clermont-Ferrand U.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) et al.
Event-by-event fluctuations of the event-wise mean transverse momentum, pT, of charged particles produced in proton-proton (pp) collisions at s = 5.02 TeV, Xe-Xe collisions at sNN = 5.44 TeV, and Pb-Pb collisions at sNN = 5.02 TeV are studied using the ALICE detector based on the integral correlator ΔpTΔpT. The correlator strength is found to decrease monotonically with increasing produced charged-particle multiplicity measured at mid-rapidity in all three systems. [...]
arXiv:2411.09334; CERN-EP-2024-297.- Geneva : CERN, 2024 - 28 p. Draft (restricted): PDF; Fulltext: PDF;
8.
Direct-photon production in inelastic and high-multiplicity proton-proton collisions at s= 13 TeV / Acharya, Shreyasi (Clermont-Ferrand U.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) et al. /ALICE
In this letter, we present the first measurement of direct photons at the transverse momentum of 1<pT<6 GeV/c at midrapidity |η|<0.8 in inelastic and high-multiplicity proton-proton collisions at a centre-of-mass energy of s = 13 TeV. The fraction of virtual direct photons in the inclusive virtual photon spectrum is obtained from a fit to the dielectron invariant mass spectrum. [...]
arXiv:2411.14366; CERN-EP-2024-295.- Geneva : CERN, 2024 - 27 p. Draft (restricted): PDF; Fulltext: PDF;
9.
Proton emission in ultraperipheral Pb-Pb collisions at sNN =5.02 TeV / Acharya, Shreyasi (Clermont-Ferrand U.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) et al. /ALICE
The first measurements of proton emission accompanied by neutron emission in the electromagnetic dissociation (EMD) of 208Pb nuclei in the ALICE experiment at the LHC are presented. The EMD protons and neutrons emitted at very forward rapidities are detected by the proton and neutron Zero Degree Calorimeters of the ALICE experiment. [...]
arXiv:2411.07058; CERN-EP-2024-288.- Geneva : CERN, 2024 - 25 p. Draft (restricted): PDF; Fulltext: PDF;
10.
Medium-induced modification of groomed and ungroomed jet mass and angularities in Pb-Pb collisions at sNN=5.02 TeV / Acharya, Shreyasi (Clermont-Ferrand U.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) et al. /ALICE
The ALICE Collaboration presents a new suite of jet substructure measurements in Pb-Pb and pp collisions at a center-of-mass energy per nucleon pair sNN=5.02 TeV. These measurements provide access to the internal structure of jets via the momentum and angle of their constituents, probing how the quark--gluon plasma modifies jets, an effect known as jet quenching. [...]
arXiv:2411.03106; CERN-EP-2024-283.- Geneva : CERN, 2024 - 20 p. Draft (restricted): PDF; Fulltext: PDF;

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