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Status of COMPASS RICH-1 Upgrade with MPGD-based Photon Detectors
/ Tessarotto, F. (INFN, Trieste) ; Alexeev, M. (INFN, Turin) ; Birsa, R. (INFN, Trieste) ; Bradamante, F. (INFN, Trieste ; U. Trieste (main)) ; Bressan, A. (INFN, Trieste ; U. Trieste (main)) ; Chiosso, M. (INFN, Turin ; U. Turin (main)) ; Ciliberti, P. (INFN, Trieste ; U. Trieste (main)) ; Dalla Torre, S. (INFN, Trieste) ; Dasgupta, S. (INFN, Trieste ; U. Trieste (main)) ; Denisov, O. (INFN, Turin) et al.
A Set of new MPGD-based Photon Detectors is being built for the upgrade of COMPASS RICH-1. The detectors cover a total active area of 1.4 m$^2$ and are based on a hybrid architecture consisting of two THGEM layers and a Micromegas. [...]
arXiv:1710.09274.-
2018 - 5 p.
- Published in : EPJ Web Conf. 174 (2018) 01004
Fulltext: epjconf_mpgd2018_01004 - PDF; arXiv:1710.09274 - PDF; External links: 00003 Rate of discharges in THGEMs as function of the bias voltage in Ar/CO$_2$ 70/30 gas mixture.; 00000 Artistic view of the COMPASS RICH-1 detector (left) and exploded view of the new PDs (right); 00002 Schematic section of the hybrid module (not in scale).; 00004 A THGEM in its handling frame (left) and inside the CsI deposition plant (right).; 00005 A THGEM in its handling frame (left) and inside the CsI deposition plant (right).; 00001 Artistic view of the COMPASS RICH-1 detector (left) and exploded view of the new PDs (right)
In : 4th International Conference on Micro Pattern Gaseous Detectors - MPGD2015, Trieste, Italy, 12 - 15 Oct 2015, pp.01004
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The MPGD-Based Photon Detectors for the upgrade of COMPASS RICH-1 and beyond
/ Agarwala, J. (INFN, Trieste) ; Alexeev, M. (INFN, Turin) ; Azevedo, C.D.R. (Aveiro U.) ; Bradamante, F. (INFN, Trieste ; Trieste U.) ; Bressan, A. (INFN, Trieste ; Trieste U.) ; Büchele, M. (Freiburg U.) ; Chiosso, M. (INFN, Turin ; Turin U.) ; Chatterjee, C. (INFN, Trieste ; Trieste U.) ; Cicuttin, A. (INFN, Trieste) ; Ciliberti, P. (INFN, Trieste ; Trieste U.) et al.
After pioneering gaseous detectors of single photon for RICH applications using CsI solid state photocathodes in MWPCs within the RD26 collaboration and by the constructions for the RICH detector of the COMPASS experiment at CERN SPS, in 2016 we have upgraded COMPASS RICH by novel gaseous photon detectors based on MPGD technology. Four novel photon detectors, covering a total active area of 1.5~m$^2$, have been installed in order to cope with the challenging efficiency and stability requirements of the COMPASS physics programme. [...]
arXiv:1807.00816.-
2019-08-21 - 4 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 936 (2019) 416-419
Fulltext: PDF;
In : Frontier Detectors for Frontier Physics: XIV Pisa Meeting on Advanced Detectors, La Biodola, Isola D'elba, Italy, 27 May - 2 Jun 2018, pp.416-419
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Development of THGEM-based Photon Detectors for COMPASS RICH-1
/ Alexeev, M (INFN, Turin ; Piemonte Orientale U., Alessandria) ; Birsa, R (INFN, Trieste) ; Bradamante, F (INFN, Trieste ; Trieste U.) ; Bressan, A (INFN, Trieste ; Trieste U.) ; Chiosso, M (INFN, Turin ; Turin U.) ; Ciliberti, P (INFN, Trieste ; Trieste U.) ; Torre, S Dalla (INFN, Trieste) ; Denisov, O (INFN, Turin) ; Duic, V (INFN, Trieste ; Trieste U.) ; Finger, M (Charles U. ; Dubna, JINR) et al.
An R&D; project is presented, aimed to develop a high performance gaseous detector of single photons, for the upgrade of the Ring Imaging Cherenkov Counter RICH-1 of the COMPASS Experiment at CERN SPS. The detector has to stably operate at high gain and high rate, to provide good time resolution and insensitivity to magnetic field, and to offer the possibility to cover very large areas at affordable cost. [...]
2012 - 7 p.
- Published in : Phys. Procedia 37 (2012) 781-788
Elsevier Open Access article: PDF; Fulltext: PDF;
In : 2nd International Conference on Technology and Instrumentation in Particle Physics, Chicago, IL, USA, 9 - 14 Jun 2011, pp.781-788
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Exotic meson $\pi_1(1600)$ with $J^{PC} = 1^{-+}$ and its decay into $\rho(770)\pi$
/ COMPASS Collaboration
We study the spin-exotic $J^{PC} = 1^{-+}$ amplitude in single-diffractive dissociation of 190 GeV$/c$ pions into $\pi^-\pi^-\pi^+$ using a hydrogen target and confirm the $\pi_1(1600) \to \rho(770) \pi$ amplitude, which interferes with a nonresonant $1^{-+}$ amplitude. We demonstrate that conflicting conclusions from previous studies on these amplitudes can be attributed to different analysis models and different treatment of the dependence of the amplitudes on the squared four-momentum transfer and we thus reconcile their experimental findings. [...]
arXiv:2108.01744; CERN-EP-2021–162.-
2022-01-01 - 30 p.
- Published in : Phys. Rev. D 105 (2022) 012005
Fulltext: 2108.01744 - PDF; PhysRevD.105.012005 - PDF;
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5.
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A Triangle Singularity as the Origin of the $a_1(1420)$
/ Alexeev, G.D. (Dubna, JINR) ; Alexeev, M.G. (Turin U. ; INFN, Turin) ; Amoroso, A. (Turin U. ; INFN, Turin) ; Andrieux, V. (CERN ; Illinois U., Urbana) ; Anosov, V. (Dubna, JINR) ; Antoshkin, A. (Dubna, JINR) ; Augsten, K. (Dubna, JINR ; CTU, Prague) ; Augustyniak, W. (NCBJ, Warsaw) ; Azevedo, C.D.R. (Aveiro U.) ; Badełek, B. (Warsaw U.) et al.
The COMPASS experiment recently discovered a new isovector resonance-like signal with axial-vector quantum numbers, the $a_1(1420)$, decaying to $f_0(980)\pi$. With a mass too close to and a width smaller than the axial-vector ground state $a_1(1260)$, it was immediately interpreted as a new light exotic meson, similar to the $X$, $Y$, $Z$ states in the hidden-charm sector. [...]
arXiv:2006.05342; CERN-EP-2020-104.-
Geneva : CERN, 2021-08-18 - 21 p.
- Published in : Phys. Rev. Lett.
Draft (restricted): PDF; Fulltext: CERN-EP-2020-104 - PDF; 2006.05342 - PDF;
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Double J/ψ production in pion-nucleon scattering at COMPASS
/ COMPASS Collaboration
We present the study of the production of double $J/\psi$ mesons using COMPASS data collected with a 190 $\GeV/c$ $\pi^-$ beam scattering off NH$_{3}$, Al and W targets. Kinematic distributions of the collected double $J/\psi$ events are analysed, and the double $J/\psi$ production cross section is estimated for each of the COMPASS targets. [...]
arXiv:2204.01817; CERN-EP-2022-073.-
Geneva : CERN, 2023-03-10 - 8 p.
- Published in : Phys. Lett. B 838 (2023) 137702
Fulltext: Publication - PDF; CERN-EP-DRAFT-COMPASS-2022-001 - PDF; 2204.01817 - PDF;
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The COMPASS RICH-1 MPGD based photon detector performance
/ Agarwala, J (ICTP, Trieste ; INFN, Pavia ; Pavia U.) ; Alexeev, M (INFN, Turin) ; Azevedo, C D R (Aveiro U.) ; Bradamante, F (Trieste U. ; INFN, Trieste) ; Bressan, A (Trieste U. ; INFN, Trieste) ; Büchele, M (Freiburg U.) ; Chatterjee, C (Trieste U. ; INFN, Trieste) ; Chiosso, M (INFN, Turin ; Turin U.) ; Cicuttin, A (ICTP, Trieste) ; Ciliberti, P (INFN, Trieste) et al.
In 2016 we have upgraded the COMPASS RICH by novel gaseous photon detectors based on MPGD technology. Four new photon detectors, covering a total active area of 1.5 m
$^{2}$, have been installed in order to cope with the challenging efficiency and stability requirements of the COMPASS physics programme. [...]
2022 - 5 p.
- Published in : J. Phys. : Conf. Ser. 2374 (2022) 012126
Fulltext: PDF;
In : International Conference on Technology and Instrumentation in Particle Physics (TIPP 2021), Online, Canada, 24 - 29 May 2021, pp.012126
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