803 research outputs found
Simulations of busy probabilities in the ALPIDE chip and the upgraded ALICE ITS detector
No full textFor the Long Shutdown 2 (LS2) upgrade of the ITS detector in the ALICE experiment at the LHC, a novel pixel detector chip, the ALPIDE chip, has been developed. In the event of busy ALPIDE chips in the ITS detector, the readout electronics may need to take appropriate action to minimize loss of data. This paper presents a lightweight, statistical simulation model for the ALPIDE chip and the up- graded ITS detector, developed using the SystemC framework. The purpose of the model is to quantify the probability of a busy condition and the data taking efficiency of the ALPIDE chips under various conditions, and to apply this knowledge during the development of the readout electronics and firmware
Strange baryon production in Pb-Pb collisions at 158 GeV/c
No full textDocument engineering considers content as a recorded resource on one hand and several dynamically computed views on the other. Since the resource as such is inaccessible and views are multiple and unordered, we argue that content objectivity is lost and document as such disappears. We propose to consider published views as a folder or a collection in which author and reader can navigate by the means of a particular and conventional view, the canonical form, that constitutes an objective reference for the content
Strange baryon production in Pb-Pb collisions at 158 GeV/c
No full textDocument engineering considers content as a recorded resource on one hand and several dynamically computed views on the other. Since the resource as such is inaccessible and views are multiple and unordered, we argue that content objectivity is lost and document as such disappears. We propose to consider published views as a folder or a collection in which author and reader can navigate by the means of a particular and conventional view, the canonical form, that constitutes an objective reference for the content
Strange baryon production in Pb-Pb collisions at 158 GeV/c
No full textDocument engineering considers content as a recorded resource on one hand and several dynamically computed views on the other. Since the resource as such is inaccessible and views are multiple and unordered, we argue that content objectivity is lost and document as such disappears. We propose to consider published views as a folder or a collection in which author and reader can navigate by the means of a particular and conventional view, the canonical form, that constitutes an objective reference for the content
Publisher Correction: Unveiling the strong interaction among hadrons at the LHC (Nature, (2020), 588, 7837, (232-238), 10.1038/s41586-020-3001-6)
No full textIn Fig. 1c of this Article, owing to an error during the production process, the equation incorrectly began ‘C(k*, r*) = …’ instead of ‘C(k*) = …’. In addition, in affiliation 71 ‘Dipartimento di Fisica dell’Università degli studi di Bari Aldo Moro’ has been corrected to read ‘Dipartimento di Fisica dell’Università degli studi di Cagliari’. The original Article has been corrected online. *A list of authors and their affiliations appears online. © 2021, The Author(s), under exclusive licence to Springer Nature Limited
Publisher Correction: Direct observation of the dead-cone effect in quantum chromodynamics (Nature, (2022), 605, 7910, (440-446), 10.1038/s41586-022-04572-w)
No full textIn the version of this article initially published, there was a typographical error in the first sentence following the “Exposing the dead cone” heading, now reading, “The measurements of R(θ), in the three radiator (charmquark) energy intervals 5 < ERadiator < 10 GeV, 10 < ERadiator < 20 GeV and 20 < ERadiator < 35 GeV…,” where “35 GeV” initially appeared as “3 GeV.” The error has been corrected in the HTML and PDF versions of the article. *A list of authors and their affiliations appears online. © The Author(s) 2022
Neutral pion production at midrapidity in pp and Pb–Pb collisions at √ sNN TeV
No full textInvariant yields of neutral pions at midrapidity in the transverse momentum range (Formula presented.)c measured in Pb–Pb collisions at (Formula presented.) TeV are presented for six centrality classes. The pp reference spectrum was measured in the range (Formula presented.)c at the same center-of-mass energy. The nuclear modification factor, (Formula presented.), shows a suppression of neutral pions in central Pb–Pb collisions by a factor of up to about (Formula presented.) for (Formula presented.) ≲(Formula presented.)c. The presented measurements are compared with results at lower center-of-mass energies and with theoretical calculations. © 2014, The Author(s)
H-3(Lambda) and (3)((Lambda)over-bar)(H)over-bar lifetime measurement in Pb-Pb collisions at root s(NN)=5.02 TeV via two-body decay
No full textAn improved value for the lifetime of the (anti-)hypertriton has been obtained using the data sample of Pb-Pb collisions at root s(NN) = 5.02 TeV collected by the ALICE experiment at the LHC. The (anti-)hypertriton has been reconstructed via its charged two-body mesonic decay channel and the lifetime has been determined from an exponential fit to the dN/d(ct) spectrum. The measured value, tau = 242(-38)(+34) (stat.) +/- 17 (syst.) ps, is compatible with representative theoretical predictions, thus contributing to the solution of the longstanding hypertriton lifetime puzzle. (C) 2019 The Author. Published by Elsevier B.V
Coherent ρ0 photoproduction in ultra-peripheral Pb-Pb collisions at √sNN=2.76 TeV
No full textWe report the first measurement at the LHC of coherent photoproduction of ρ0 mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for ρ0 production are studied in the π+π− decay channel at mid-rapidity. The production cross section in the rapidity range |y| < 0.5 is found to be dσ/dy = 425 ± 10(stat.)− 50 + 42 (sys.) mb. Coherent ρ0 production is studied with and without requirement of nuclear breakup, and the fractional yields for various breakup scenarios are presented. The results are compared with those from lower energies and with model predictions. © 2015, The Author(s)
Measuring (KSK +/-)-K-0 interactions using Pb-Pb collisions at root S-NN=2.76 TeV
No full textWe present the first ever measurements of femtoscopic correlations between the K-S(0) and K-+/- particles. The analysis was performed on the data from Pb-Pb collisions at root S-NN = 2.76 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding via the a(0)(980) resonance. The extracted kaon source radius and correlation strength parameters for (KSK-)-K-0 are found to be equal within the experimental uncertainties to those for (KSK+)-K-0. Comparing the results of the present study with those from published identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a(0) resonance are tested. Our results are also compatible with the interpretation of the a(0) having a tetraquark structure instead of that of a diquark. (c) 2017 The Author. Published by Elsevier B.V
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