Prototype tests for the ALICE TRD

Andronic, A.; Blume, C.; Braun‐Munzinger, P.; Daues, H.; Devismes, A.; Finck, C.; Schulze, R.; Sedykh, S.; Simon, R.S.; Stelzer, H.; Appelshäuser, H.; Herrmann, N.; Mahmoud, T.; Reischl, A.; Stachel, J.; Wessels, J. P.; Windelband, B.; Xu, C.; Cătănescu, V.; Ciobanu, M.; Petrovici, M.; Lister, Tim; Peitzmann, T.; Reygers, K.; Santo, R.; Winkelmann, Otto

doi:10.1109/23.958762

Cited by 17 publications

(15 citation statements)

References 20 publications

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“…The track-by-track electron identification is at the moment based on the simplest method of TRD particle identification -one-dimensional likelihood on the total integrated charge measured in a single TRD chamber (tracklet). Figure 3 shows the charge deposit per TRD chamber for pions and electrons at a momentum of 2 GeV/c from pp collisions at √ s = 7 TeV compared with the testbeam measurements taken in 2004 [6]. The distributions from pp collisions are in good agreement with the testbeam measurements.…”

Section: Electron Identificationmentioning

confidence: 55%

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Physics with the ALICE Transition Radiation Detector

Pachmayer

2013

Nuclear Instruments and Methods in Physics Research Section A:

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The ALICE Transition Radiation Detector (TRD) significantly enlarges the scope of physics observables studied in ALICE, because it allows due to its electron identification capability to measure open heavy-flavour production and quarkonium states, which are essential probes to characterize the Quark-Gluon-Plasma created in nucleus-nucleus collisions at LHC. In addition the TRD enables to enhance rare probes due to its trigger contributions. We report on the first results of the electron identification capability of the ALICE Transition Radiation Detector (TRD) in pp collisions at √ s = 7 TeV using a one-dimensional likelihood method on integrated charge measured in each TRD chamber. The analysis of heavy flavour production in pp collisions at √ s = 7 TeV with this particle identification method, which extends the p t range of the existing measurement from p t = 4 GeV/c to 10 GeV/c and reduces the systematic uncertainty due to particle identification, is presented. The performance of the application of the TRD electron identification in the context of J/ψ measurements in Pb-Pb collisions is also shown.

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Section: Electron Identificationmentioning

confidence: 55%

“…the recorded time evolution of the signal, where at large drift times the TR peak is measured. Studies show that for the two mentioned methods a pion rejection of better than 100 is expected for an electron efficiency of 90% in the momentum range 1-2 GeV/c (with 6 layers) [6,9,10].…”

Section: Electron Identificationmentioning

confidence: 99%

Physics with the ALICE Transition Radiation Detector

Pachmayer

2013

Nuclear Instruments and Methods in Physics Research Section A:

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“…When ultrarelativistic particles γ > 1000 intersect a boundary of two substances with different constants, X ray radi ation photons are emitted. In addition, the transition radiation detectors (TRDs) [115][116][117][118][119][120][121][122][123] are efficiently used not only for identification of particles, such as electrons and positrons, but also as tracking detectors, since the typical TRD includes the gas wire chamber.…”

Section: Transition Radiation Detectormentioning

confidence: 99%

“…In the experiments at the LHC, the TRDs are used at the ATLAS [115] and ALICE [116][117][118][119][120][121][122][123][124][125][126][127] setups. It is assumed that the quark-gluon plasma can appear at the LHC at Pb-Pb collisions in the center of masses with 5.4 TeV energy.…”

Section: Transition Radiation Detectormentioning

confidence: 99%

Special features of detectors, electronics, and trigger system of the ALICE setup

Nikityuk

Самойлов

2012

Phys. Part. Nuclei

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Special features and parameters of detectors, front end electronics, and trigger electronics of the ALICE setup, which is intended for investigations of ultrarelativistic nucleon-nucleon collisions at the LHC and for studies of heavy ion collisions, starting from protons to several types of ions, which have 5.5 TeV/nucleon energy in the center of mass, are described. One of the first collisions of lead ions was recorded by the ALICE detector

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“…5. The simulations were adjusted to test beam data [28] for well isolated tracks (dots in Fig. 5 left) and then performed for various track multiplicities.…”

Section: Dielectronmentioning

confidence: 99%

Heavy quark measurements with ALICE

Crochet

2002

EPJ direct

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IntroductionThe LHC heavy ion physics program aims at investigating the properties of strongly interacting matter at extreme energy density where the formation of the Quark Gluon Plasma (QGP) is expected [1]. Among the most promising observables, heavy quarkonium states are especially relevant since they provide, via their leptonic decays, an essential probe of the earliest and hottest stages of heavy ion collisions. From the early predictions of charmonium suppression by Debye screening in a deconfined medium [2] to the recent results from the NA50 collaboration [3], a lot of effort has been devoted to the subject (for reviews see [4,5]). The LHC energy is ideal for a spectroscopy of the whole set of resonances. In particular, because a much higher temperature than that expected to be reached at RHIC is needed to dissolve the Υ meson, the spectroscopy of the Υ family at LHC energies should reveal an unique set of information on the characteristics of the QGP [6]. On the other hand, the study of heavy quark resonances at the LHC is subject to significant differences with respect to the SPS energies. First of all the signals will be sitting on top of a complex combinatorial background, mainly coming from open charm and open bottom decay [7]. Then, in addition to prompt charmonia produced "directly" via hard scattering, secondary charmonia can be produced from bottom decay [8], DD annihilation [9, 10] and statistical hadronization [11,12,13]. Furthermore, the SPS results have demonstrated that the study of onium suppression must be closely joined to the study of open heavy flavours because both open and hidden quarkonia arise from the same underlying production mechanism. Although it is commonly admitted that, at the LHC, a large production rate of cc and bb pairs is expected 1 , the present estimations for heavy flavour production in nucleon-nucleon collisions are subject to some 1 Up to 115 cc and 5 bb should to be produced per central (5% of the total cross-section) PbPb collision [14].

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Prototype tests for the ALICE TRD

Cited by 17 publications

References 20 publications

Physics with the ALICE Transition Radiation Detector

Physics with the ALICE Transition Radiation Detector

Special features of detectors, electronics, and trigger system of the ALICE setup

Heavy quark measurements with ALICE

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