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CERN Document Server 119 records found  1 - 10próximoend  jump to record: Search took 0.56 seconds. 
1.
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
2.
Hyperon signatures in the PANDA experiment at FAIR / PANDA Collaboration
We present a detailed simulation study of the signatures from the sequential decays of the triple-strange pbar p -> Ω+Ω- -> K+ΛbarK- Λ -> K+pbarπ+K-pπ- process in the PANDA central tracking system with focus on hit patterns and precise time measurement. [...]
arXiv:2304.11977.
- 29 p.
Fulltext
3.
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;
4.
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;
5.
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;
6.
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;
7.
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;
8.
Probing transversity by measuring $\Lambda$ polarisation in SIDIS / Alexeev, M.G. ; Alexeev, G.D. (Dubna, JINR) ; Amoroso, A. ; Andrieux, V. ; Anosov, V. (Dubna, JINR) ; Augsten, K. ; Augustyniak, W. (NCBJ, Warsaw) ; Azevedo, C.D.R. (Aveiro U.) ; Badełek, B. (Warsaw U.) ; Balestra, F. et al. /COMPASS
Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production in Semi-Inclusive measurements of Deep Inelastic Scattering (SIDIS), the chiral-odd transversity quark distribution functions $h_1^q$ are nowadays well established. Several possible channels to access these functions were originally proposed. [...]
arXiv:2104.13585; CERN-EP-2021-072.- Geneva : CERN, 2022-01-10 - 18 p. Draft (restricted): PDF; Fulltext: CERN-EP-2021-072 - PDF; 2104.13585 - PDF;
9.
Spin Density Matrix Elements in Exclusive $\omega$ Meson Muoproduction $^*$ / COMPASS Collaboration
We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $\omega$ meson muoproduction on the proton at COMPASS using 160 GeV/$c$ polarised $ \mu ^{+}$ and $ \mu ^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the range 5.0 GeV/$c^2$ $< W <$ 17.0 GeV/$c^2$, with the average kinematics $\langle Q^{2} \rangle=$ 2.1 (GeV/$c$)$^2$, $\langle W \rangle= 7.6$ GeV/$c^2$, and $\langle p^{2}_{\rm T} \rangle = 0.16$ (GeV/$c$)$^2$. [...]
arXiv:2009.03271; CERN-EP-2020-169.- Geneva : CERN, 2021-02-05 - 22 p. - Published in : Eur. Phys. J. C 81 (2021) 126 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 2009.03271 - PDF; CERN-EP-2020-169 - PDF;
10.
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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Veja também: nomes de autores similares
156 Slunecka, M
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