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1.
Development of the new large area Micromegas detector and its readout electronics for the AMBER experiment at CERN / Alice, C (INFN, Turin ; Turin U.) ; Alexeev, M (INFN, Turin ; Turin U.) ; Amoroso, A (INFN, Turin ; Turin U.) ; Chiosso, M (INFN, Turin ; Turin U.) ; Chubinidze, Z (Frascati) ; Denisov, O (INFN, Turin) ; Giordano, D (INFN, Turin) ; Gongadze, A (Ilia State U. ; Dubna, JINR) ; Kovyazina, N A (Dubna, JINR) ; Panzieri, D (Piemonte Orientale U., Novara ; INFN, Turin)
For the AMBER (NA66) experiment several upgrades of the COMPASS (NA58) spectrometer are foreseen for the medium and long-term AMBER program. Among this R&D; program the replacement of a part of the Multi-Wire Proportional Chambers (MWPCs) is planned, to face up the aging of some of the structural elements of the MWPC chambers. [...]
2025 - 3 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1079 (2025) 170611 Fulltext: PDF;
2.
Spectroscopy of Strange Mesons and First Observation of a Strange Crypto-Exotic State with $J^P=0^-$ / COMPASS Collaboration
We measured the strange-meson spectrum in the scattering reaction $K^{-}+p \rightarrow K^{-}\pi^{-}\pi^{-}+p$ with the COMPASS spectrometer at CERN. [...]
arXiv:2504.09470 ; CERN-EP-2025-086.
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Fulltext
3.
Summary Report of the Physics Beyond Colliders Study at CERN / PBC Collaboration
The Physics Beyond Collider Study Group was initially mandated by the CERN Management to prepare the previous European Particle Physics Strategy Update for CERN projects other than the high-energy frontier colliders. The main findings were summarized in~\cite{PBC_summary_2020}. [...]
CERN-PBC-REPORT-2025-003; arXiv:2505.00947.- Geneva : CERN, 2025 - 121 p. Final report: PDF; Fulltext: PDF;
4.
Measurement of the hard exclusive $\pi^{0}$ muoproduction cross section at COMPASS / COMPASS Collaboration
A new and detailed measurement of the cross section for hard exclusive neutral-pion muoproduction on the proton was performed in a wide kinematic region, with the photon virtuality $Q^2$ ranging from 1 to 8 (GeV/$c$)$^{\rm\, 2}$ and the Bjorken variable $x_{\rm Bj}$ ranging from 0.02 to 0.45. [...]
arXiv:2412.19923 ; CERN-EP-2024-346.
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Fulltext
5.
Multiplicities of positive and negative pions, kaons, and unidentified hadrons from deep-inelastic scattering of muons off a liquid hydrogen target / COMPASS Collaboration
The multiplicities of positive and negative pions, kaons and unidentified hadrons produced in deep-inelastic scattering are measured in bins of the Bjorken scaling variable $x$, the relative virtual-photon energy $y$ and the fraction of the virtual-photon energy transferred to the final-state hadron $z$. Data were obtained by the COMPASS Collaboration using a 160 GeV muon beam of both electric charges and a liquid hydrogen target. [...]
arXiv:2410.12005; CERN-EP-2024-270.- 2025-07-01 - 16 p. - Published in : Phys. Rev. D 112 (2025) 012002 Fulltext: 2410.12005 - PDF; document - PDF;
6.
Design and Testing of a new Tracking System for the Proton Charge Radius Measurement with the AMBER Experiment at CERN / Alexeev, M G (Turin U. ; INFN, Turin) ; Alice, C (Turin U. ; INFN, Turin) ; Amoroso, A (Turin U. ; INFN, Turin) ; Bajzek, M (Darmstadt, GSI) ; Chiosso, M (Turin U. ; INFN, Turin) ; Denisov, O (INFN, Turin ; CERN) ; Dreisbach, C (Munich, Tech. U.) ; Eichhorn, K (Munich, Tech. U.) ; Fischer, H (Freiburg U.) ; Friedrich, J M (Munich, Tech. U. ; ORIGINS, Garching) et al.
The concept of the unified tracking station designed for the proton charge-radius measurement planned at the AMBER (NA66) fixed-target experiment at CERN is presented. Composed of scintillating-fiber hodoscope and silicon-pixel detectors, it aims to provide 30 μrad angular resolution for the measurement of muons at momenta of 100 GeV with a time resolution of 1 ns at a nominal beam rate of 2×10$^6$ particles per second. [...]
2024 - 7 p. - Published in : PoS VERTEX2023 (2024) 049 Fulltext: PDF;
In : 32nd International Workshop on Vertex Detectors (VERTEX 2023), Sestri Levante, Italy, 16 - 20 Oct 2023, pp.049
7.
High-Statistics Measurement of Collins and Sivers Asymmetries for Transversely Polarized Deuterons / COMPASS Collaboration
New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarised $^6$LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 \gevv muon beam at CERN, balancing the existing data on transversely polarised proton targets. [...]
arXiv:2401.00309; CERN-EP-2023-308.- 2024-09-05 - 10 p. - Published in : Phys. Rev. Lett. 133 (2024) 101903 Fulltext: 2401.00309 - PDF; Publication - PDF;
8.
Final COMPASS results on the transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan process / COMPASS Collaboration
The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c $\pi^{-}$ beam impinging on a transversely polarised ammonia target. Combining the data of both years, we present final results on the amplitudes of the five azimuthal modulations in the dimuon production cross section. [...]
arXiv:2312.17379; CERN-EP-2023-307.- 2024-08-14 - 8 p. - Published in : Phys. Rev. Lett. 133 (2024) 071902 Fulltext: 2312.17379 - PDF; Publication - PDF;
9.
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
10.
Development of a Micromegas prototype for the AMBER experiment at CERN / Alexeev, M G (INFN, Turin ; Turin U.) ; Alice, C (INFN, Turin ; Turin U.) ; Amoroso, A (INFN, Turin ; Turin U.) ; Chiosso, M (INFN, Turin ; Turin U.) ; Chubinidze, Z (Frascati) ; Denisov, O (INFN, Turin) ; Giordano, D (INFN, Turin ; Turin U.) ; Gongadze, A (Tbilisi, Inst. Phys. ; Dubna, JINR) ; Kovyazina, N A (Dubna, JINR) ; Panzieri, D (INFN, Turin ; Piemonte Orientale U., Novara)
We present the development and testing of a Micromegas detector prototype and its front end intended to be a candidate for the substitutions of some of the Multiwire Proportional Chambers in the future AMBER (NA66) experiment at CERN. Results of the test of the first small size prototype are discussed..
2023 - 3 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1049 (2023) 168043
In : 15th Pisa Meeting on Advanced Detectors, La Biodola - Isola D'elba, Italy, 22 - 28 May 2022, pp.168043

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