Cosmic-ray physics at CERN Rodríguez Cahuantzi, M.
Journal of physics. Conference series,
06/2017, Letnik:
866, Številka:
1
Journal Article
Recenzirano
Odprti dostop
Accelerator experiments located underground are suitable for the study of atmospheric muons. The use of high-energy collider detectors for cosmic-ray physics was pioneered during the era of the Large ...Electron-Positron (LEP) collider at CERN by ALEPH, DELPHI and L3 collaborations. A development of these programs is possible at the Large Hadron Collider (LHC), where experiments like ALICE and CMS will operate for many years, with the possibility of recording a large amount of cosmic-ray data. In this proceedings, a review of the results obtained by LEP and LHC experiments is presented. This material was discussed along two sessions during the VI School on Cosmic-ray Physics and Astrophysics held at the Mesoamerican Center for Theoretical Physics (MCTP) located in Tuxtla Gutierrez, Chiapas, Mexico.
A beam–beam monitoring detector for the MPD experiment at NICA Alvarado, Mauricio; Ayala, Alejandro; Ayala-Torres, Marco Alberto ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2020, Letnik:
953
Journal Article
Recenzirano
Odprti dostop
The Multi-Purpose Detector (MPD) is to be installed at the Nuclotron Ion Collider fAcility (NICA) of the Joint Institute for Nuclear Research (JINR). Its main goal is to study the phase diagram of ...the strongly interacting matter produced in heavy-ion collisions. These studies, while providing insight into the physics of heavy-ion collisions, are relevant for improving our understanding of the evolution of the early Universe and the formation of neutron stars. In order to extend the MPD trigger capabilities, we propose to include a high granularity beam–beam monitoring detector (BE–BE) to provide a level-0 trigger signal with an expected time resolution of 30 ps. This new detector will improve the determination of the reaction plane by the MPD experiment, a key measurement for flow studies that provides physics insight into the early stages of the reaction.
In this work, we use simulated Au+Au collisions at NICA energies to show the potential of such a detector to determine the event plane resolution, providing further redundancy to the detectors originally considered for this purpose namely, the Fast Forward Detector (FFD) and the Hadron Calorimeter (HCAL). We also show our results for the time resolution studies of two prototype cells carried out at the T10 beam line at the CERN PS complex.
ALICE is one of the four main experiments of the LHC at CERN. Located 40 meters underground, with 30 m of overburden rock, it can also operate to detect muons produced by cosmic-ray interactions in ...the atmosphere. An analysis of the data collected with cosmic-ray triggers from 2010 to 2013, corresponding to about 31 days of live time, is presented. Making use of the ability of the Time Projection Chamber (TPC) to track large numbers of charged particles, a special emphasis is given to the study of muon bundles, and in particular to events with high-muon density.
During the 2011 Pb-Pb run, dedicated triggers were used by the ALICE Collaboration to enrich ultra-peripheral collisions (UPC) to measure the J/ψ production cross section and its rapidity dependence ...at a centre of mass energy of 2.76 TeV per nucleon pair. In this article, the ongoing studies on J/ψ photoproduction in UPC events are presented.
The 31st Annual Meeting of the Division of Particles and Fields (DPyC) of the Mexican Physical Society was held at the José Ádem Auditorium in Cinvestav-IPN, Mexico City, Mexico, on 24-26 May 2017. ...We are extremely glad to have had a record of 180 participants attending the meeting, in which 82 presentations (39 posters and 53 talks including 40 contributed, 12 invited and a closing talk) were given. These numbers and the unquestionable scientific quality of the research work presented show the success of this meeting. In the days immediately before the meeting (22-23 May 2017) we organized a Tau Physics mini-Workshop, which can be considered the third edition of a series started in Krakow 1, 2, and where we had 12 invited seminars fostering discussions between the local Community working on Tau Physics and the invited foreign speakers, who participated in our national meeting as well. All presenters of both meetings were invited to contribute and roughly half of them accepted. We thank them for this effort, which made these proceedings possible.
Detection of atmospheric muons with ALICE detectors Alessandro, B.; Cortes Maldonado, I.; Cuautle, E. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
05/2010, Letnik:
617, Številka:
1
Journal Article
Recenzirano
The calibration, alignment and commissioning of most of the ALICE (A Large Ion Collider Experiment at the CERN LHC) detectors have required a large amount of cosmic events during 2008. In particular ...two types of cosmic triggers have been implemented to record the atmospheric muons passing through ALICE. The first trigger, called ACORDE trigger, is performed by 60 scintillators located on the top of three sides of the large L3 magnet surrounding the central detectors, and selects atmospheric muons. The Silicon Pixel Detector (SPD) installed on the first two layers of the Inner Tracking System (ITS) gives the second trigger, called SPD trigger. This trigger selects mainly events with a single atmospheric muon crossing the SPD. Some particular events, in which the atmospheric muon interacts with the iron of the L3 magnet and creates a shower of particles crossing the SPD, are also selected. In this work the reconstruction of events with these two triggers will be presented. In particular, the performance of the ACORDE detector will be discussed by the analysis of multi-muon events. Some physical distributions are also shown.
An important observable to understand the properties of the matter produced in heavy-ion collisions is its strangeness content. Recent experimental results show that in semi-central collisions, the Λ ...and
global polarization show differences that increase at low energies. This behaviour has been described using a model where these particles may be produced from two distinct density zones in the collision region: the core and the corona where QGP processes and
p
+
p
like reactions, respectively, are mainly at work. Using this idea, the polarization can be influenced by the relative abundance of these particles coming from either regions. In this work we show how to test this model in the MPD experiment.
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