CERN Accelerating science

CERN Document Server 120 ჩანაწერია ნაპოვნი  1 - 10შემდეგიდასასრული  ჩანაწერთან გადასვლა: ძიებას დასჭირდა 0.91 წამი. 
1.
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;
2.
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;
3.
Triggerless data acquisition system for the AMBER experiment / Zemko, Martin (CERN ; Prague, Tech. U.) ; Ecker, Dominik (Munich, Tech. U.) ; Frolov, Vladimir (Munich, Tech. U.) ; Huber, Stefan (Munich, Tech. U.) ; Jarý, Vladimír (Prague, Tech. U.) ; Konorov, Igor (Munich, Tech. U.) ; Květoň, Antonín (Charles U.) ; Nový, Josef (Prague, Tech. U.) ; Veit, Benjamin Moritz (CERN ; Mainz U., Inst. Phys.) ; Virius, Miroslav (Prague, Tech. U.)
We developed a novel free-running data acquisition system for the AMBER experiment. The system features a hybrid architecture containing a scalable FPGA-based system for data collection and conventional distributed computing for data reduction. [...]
2022 - 6 p. - Published in : PoS ICHEP2022 (2022) 248 Fulltext: PDF;
In : 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.248
4.
Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering / COMPASS Collaboration
A set of measurements of azimuthal asymmetries in the production of pairs of identified hadrons in deep-inelastic scattering of muons on transversely polarised 6LiD (deuteron) and NH3 (proton) targets is presented. All available data collected in the years 2002–2004 and 2007/2010 with the COMPASS spectrometer using a muon beam of 160 GeV=c at the CERN SPS were analysed. [...]
arXiv:2301.02013; CERN-EP-2022-292.- Geneva : CERN, 2023-08-29 - 11 p. - Published in : Phys. Lett. B 845 (2023) 138155 Draft (restricted): PDF; Fulltext: CERN-EP-2022-292 - PDF; 2301.02013 - PDF; Publication - PDF;
5.
Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of $\rho^0$ mesons / COMPASS Collaboration
The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced $\rho^0$ mesons. [...]
arXiv:2211.00093; CERN-EP-2022-234; CERN-EP-2022--234.- Geneva : CERN, 2023-06-16 - 9 p. - Published in : Phys. Lett. B 843 (2023) 137950 Draft (restricted): PDF; Fulltext: CERN-EP-2022-234_2 - PDF; Publication - PDF; 2211.00093 - PDF;
6.
Spin density matrix elements in exclusive $\rho ^0$ meson muoproduction / COMPASS Collaboration
We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $\rho ^0$ meson muoproduction at COMPASS using 160~GeV/$c$ polarised $ \mu ^{+}$ and $ \mu ^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the kinematic range 5.0~GeV/$c^2$ $< W <$ 17.0~GeV/$c^2$, 1.0 (GeV/$c$)$^2$ $< Q^2 <$ 10.0 (GeV/$c$)$^2$ and 0.01 (GeV/$c$)$^2$ $< p_{\rm{T}}^2 <$ 0.5 (GeV/$c$)$^2$. [...]
arXiv:2210.16932; CERN-EP-2022-231.- Geneva : CERN, 2023-10-13 - 32 p. - Published in : Eur. Phys. J. C 83 (2023) 924 Draft (restricted): PDF; Fulltext: CERN-EP-2022-231 - PDF; Publication - PDF; 2210.16932 - PDF;
7.
Free-running data acquisition system for the AMBER experiment / Zemko, Martin (CERN ; Prague, Tech. U.) ; Frolov, Vladimir (Dubna, JINR) ; Huber, Stefan (Munich, Tech. U.) ; Jary, Vladimir (Prague, Tech. U.) ; Konorov, Igor (Munich, Tech. U.) ; Kveton, Antonin (Charles U.) ; Levit, Dmytro (Munich, Tech. U.) ; Novy, Josef (Prague, Tech. U.) ; Steffen, Dominik (Munich, Tech. U.) ; Veit, Benjamin Moritz (CERN ; Mainz U., Inst. Phys.) et al.
Triggered data acquisition systems provide only limited possibilities of triggering methods. In our paper, we propose a novel approach that completely removes the hardware trigger and its logic. [...]
2021 - 12 p. - Published in : EPJ Web Conf. 251 (2021) 04028 Fulltext: PDF;
In : 25th International Conference on Computing in High-Energy and Nuclear Physics (CHEP), Online, Online, 17 - 21 May 2021, pp.04028
8.
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;
9.
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;
10.
Data Acquisition System for the COMPASS++/ AMBER Experiment / Frolov, Vladimir (CERN ; Dubna, JINR) ; Huber, Stefan (Munich, Tech. U.) ; Konorov, Igor (Munich, Tech. U.) ; Kveton, Antonin (CTU, Prague) ; Levit, Dmytro (Munich, Tech. U.) ; Novy, Josef (CTU, Prague) ; Steffen, Dominik (Munich, Tech. U.) ; Veit, Benjamin Moritz (CERN ; Mainz U.) ; Virius, Miroslav (CTU, Prague) ; Zemko, Martin (CERN ; CTU, Prague) et al.
We present a new data acquisition system for the COMPASS++/AMBER experiment designed as a further development of the intelligent FPGA-based data acquisition framework. The system is designed to have a maximum throughput of 5 GB/s. [...]
2021 - 8 p. - Published in : IEEE Trans. Nucl. Sci. 68 (2021) 1891-1898 Fulltext: PDF;

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