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A Cylindrical GEM Inner Tracker for the BESIII experiment at IHEP
/ Farinelli, R. (INFN, Ferrara ; Ferrara U.) ; Alexeev, M. (INFN, Turin) ; Amoroso, A. (INFN, Turin) ; Bianchi, F. (INFN, Turin) ; Bertani, M. (INFN, Rome) ; Bettoni, D. (INFN, Ferrara) ; Canale, N. (INFN, Ferrara ; Ferrara U.) ; Calcaterra, A. (INFN, Rome) ; Carassiti, V. (INFN, Ferrara) ; Cerioni, S. (INFN, Rome) et al.
The Beijing Electron Spectrometer III (BESIII) is a multipurpose detector that collects data provided by the collision in the Beijing Electron Positron Collider II (BEPCII), hosted at the Institute of High Energy Physics of Beijing. [...]
arXiv:1807.00500.
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2018.
Fulltext
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2.
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The new cylindrical GEM inner tracker of BESIII
/ Lavezzi, L. (Beijing, Inst. High Energy Phys. ; INFN, Turin) ; Alexeev, M. (INFN, Turin) ; Amoroso, A. (INFN, Turin ; Turin U.) ; Baldini Ferroli, R. (Beijing, Inst. High Energy Phys. ; Frascati) ; Bertani, M. (Frascati) ; Bettoni, D. (INFN, Ferrara) ; Bianchi, F. (INFN, Turin ; Turin U.) ; Calcaterra, A. (Frascati) ; Canale, N. (INFN, Ferrara) ; Capodiferro, M. (Frascati ; INFN, Rome) et al.
The Cylindrical GEM-Inner Tracker (CGEM-IT) is the upgrade of the internal tracking system of the BESIII experiment. It consists of three layers of cylindrically-shaped triple GEMs, with important innovations with respect to the existing GEM detectors, in order to achieve the best performance with the lowest material budget. [...]
arXiv:1803.07258.-
2018-05-03 - 6 p.
- Published in : Int. J. Mod. Phys. Conf. Ser. 46 (2018) 1860077
Fulltext: PDF; Fulltext from Publisher: PDF; External link: Fulltext
In : The 21st Particles & Nuclei International Conference, Beijing, China, 1 - 5 Sep 2017, pp.1860077
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3.
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Test beam results of a Cylindrical GEM detector for the BESIII experiment
/ Mezzadri, Giulio (INFN, Ferrara ; Ferrara U.) ; Alexeev, Maxim (INFN, Turin) ; Amoroso, Antonio (INFN, Turin ; Turin U.) ; Baldini Ferroli, Rinaldo (Beijing, Inst. High Energy Phys. ; Frascati) ; Bertani, Monica (Frascati) ; Bettoni, Diego (INFN, Ferrara) ; Bianchi, Fabrizio (INFN, Turin ; Turin U.) ; Calcaterra, Alessandro (Frascati) ; Canale, Nicola (INFN, Ferrara) ; Capodiferro, Manlio (Frascati ; INFN, Rome) et al.
Gas detector are very light instrument used in high energy physics to measure the particle properties: position and momentum. Through high electric field is possible to use the Gas Electron Multiplier (GEM) technology to detect the charged particles and to exploit their properties to construct a large area detector, such as the new IT for BESIII. [...]
arXiv:1803.07489.-
SISSA, 2019 - 8 p.
- Published in : PoS MPGD2017 (2019) 048
Fulltext: 1803.07489 - PDF; PoS(MPGD2017)048 - PDF;
In : 5th International Conference on Micro-Pattern Gas Detectors, Philadelphia, Pennsylvania, Pa, Usa, 22 - 26 May 2017, pp.048
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4.
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The Cylindrical GEM Inner Tracker of the BESIII experiment: prototype test beam results
/ Lavezzi, L. (Beijing, Inst. High Energy Phys. ; INFN, Turin) ; Alexeev, M. (INFN, Turin) ; Amoroso, A. (INFN, Turin ; Turin U.) ; Baldini Ferroli, R. (Beijing, Inst. High Energy Phys. ; Frascati) ; Bertani, M. (Frascati) ; Bettoni, D. (INFN, Ferrara) ; Bianchi, F. (INFN, Turin ; Turin U.) ; Calcaterra, A. (Frascati) ; Canale, N. (INFN, Ferrara) ; Capodiferro, M. (Frascati ; INFN, Rome ; Rome U.) et al.
A cylindrical GEM detector is under development, to serve as an upgraded inner tracker at the BESIII spectrometer. It will consist of three layers of cylindrically-shaped triple GEMs surrounding the interaction point. [...]
arXiv:1706.02428.-
2017-07-27 - 6 p.
- Published in : JINST 12 (2017) C07038
Preprint: PDF;
In : Instrumentation for Colliding Beam Physics, Novosibirsk, Russia, 27 Feb - 3 Mar 2017, pp.C07038
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Development and Test of a $\mu$TPC Cluster Reconstruction for a Triple GEM Detector in Strong Magnetic Field
/ Farinelli, R. (INFN, Ferrara ; Ferrara U.) ; Alexeev, M. (INFN, Turin) ; Amoroso, A. (INFN, Turin) ; Bianchi, F. (INFN, Turin) ; Bertani, M. (Beijing, Inst. High Energy Phys.) ; Bettoni, D. (INFN, Ferrara) ; Canale, N. (INFN, Ferrara ; Ferrara U.) ; Calcaterra, A. (Beijing, Inst. High Energy Phys.) ; Carassiti, V. (INFN, Ferrara) ; Cerioni, S. (Beijing, Inst. High Energy Phys.) et al.
Performance of triple GEM prototypes has been evaluated by means of a muon beam at the H4 line of the SPS test area at CERN. The data from two planar prototypes have been reconstructed and analyzed offline with two clusterization methods: the enter of gravity of the charge distribution and the micro Time Projection Chamber (\muTPC). [...]
arXiv:1707.04456.-
Oct. 2016 - 4 p.
- Published in : 10.1109/NSSMIC.2016.8069914
Preprint: PDF;
In : IEEE Nuclear Science Symposium and Medical Imaging Conference, Strasbourg, France, 29 Oct - 6 Nov 2016, pp.8069914
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7.
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A new $G$-parity violating amplitude in the $J/\psi$ decay?
/ Ferroli, R. Baldini (Frascati) ; De Mori, F. (INFN, Turin ; Turin U.) ; Destefanis, M. (INFN, Turin ; Turin U.) ; Maggiora, M. (INFN, Turin ; Turin U.) ; Pacetti, S. (INFN, Perugia ; Perugia U.) ; Yan, L. (Hefei, CUST) ; Bertani, M. (Frascati) ; Calcaterra, A. (Frascati) ; Felici, G. (Frascati) ; Patteri, P. (Frascati) et al.
The $J/\psi$ meson has negative $G$-parity so that, in the limit of isospin conservation, its decay into $\pi^+\pi^-$ should be purely electromagnetic. However, the measured branching fraction $\mathcal{B}(J/\psi\to\pi^+\pi^-)$ exceeds by more than 3.9 standard deviations the expectation computed according to BaBar data on the $e^+e^-\to\pi^+\pi^-$ cross section. [...]
arXiv:1608.07191.-
2017-02-27 - 11 p.
- Published in : Phys. Rev. D 95 (2017) 034038
Preprint: PDF; External link: Preprint
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8.
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Search for heavy neutral lepton production in $K^+$ decays
/ NA62 Collaboration
A search for heavy neutral lepton production in $K^+$ decays using a data sample collected with a minimum bias trigger by the NA62 experiment at CERN in 2015 is reported. Upper limits at the $10^{-7}$ to $10^{-6}$ level are established on the elements of the extended neutrino mixing matrix $|U_{\ell 4}|^2$ ($\ell=e,\mu$) for heavy neutral lepton mass in the range $170-448~{\rm MeV}/c^2$. [...]
arXiv:1712.00297; CERN-EP-2017-311.-
Geneva : CERN, 2018-03-10 - 9 p.
- Published in : Phys. Lett. B 778 (2018) 137-145
Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: arXiv:1712.00297 - PDF; CERN-EP-2017-311 - PDF;
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9.
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Search for $K^+$ decays to a muon and invisible particles
/ NA62 Collaboration
The NA62 experiment at CERN reports searches for $K^+\to\mu^+N$ and $K^+\to\mu^+\nu X$ decays, where $N$ and $X$ are massive invisible particles, using the 2016-2018 data set. The $N$ particle is assumed to be a heavy neutral lepton, and the results are expressed as upper limits of ${\cal O}(10^{-8})$ of the neutrino mixing parameter $|U_{\mu4}|^2$ for $N$ masses in the range 200-384 MeV/$c^2$ and lifetime exceeding 50 ns. [...]
arXiv:2101.12304; CERN-EP-2021-018.-
Geneva : CERN, 2021-05-10 - 10 p.
- Published in : Phys. Lett. B 816 (2021) 136259
Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 2101.12304 - PDF; CERN-EP-2021-018 - PDF;
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10.
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Improved calorimetric particle identification in NA62 using machine learning techniques
/ NA62 Collaboration
Measurement of the ultra-rare $K^+\to\pi^+\nu\bar\nu$ decay at the NA62 experiment at CERN requires high-performance particle identification to distinguish muons from pions. Calorimetric identification currently in use, based on a boosted decision tree algorithm, achieves a muon misidentification probability of $1.2\times 10^{-5}$ for a pion identification efficiency of 75% in the momentum range of 15$-$40 GeV/$c$. [...]
arXiv:2304.10580; CERN-EP-2023-066.-
Geneva : CERN, 2023-11-21 - 13 p.
- Published in : JHEP 2311 (2023) 138
Draft (restricted): PDF; Fulltext: 2304.10580 - PDF; document - PDF; CERN-EP-2023-066 - PDF;
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