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CERN Document Server 2,042 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 0.19 секунд. 
1.
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
2.
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
3.
Measurement of $P_T$-weighted Sivers asymmetries in leptoproduction of hadrons / COMPASS Collaboration
The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum $P_T$, allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. [...]
arXiv:1809.02936; CERN-EP-2018-242.- Geneva : CERN, 2019-03 - 20 p. - Published in : Nucl. Phys. B 940 (2019) 34-53 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2018-242 - PDF; 1809.02936 - PDF;
4.
Leading-order determination of the gluon polarisation from semi-inclusive deep inelastic scattering data / COMPASS collaboration
Using a novel analysis technique, the gluon polarisation in the nucleon is re-evaluated using the longitudinal double-spin asymmetry measured in the cross section of semi-inclusive single-hadron muoproduction with photon virtuality $Q^2>1~({\rm GeV}/c)^2$. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/$c$ polarised muon beam impinging on a polarised $^6$LiD target. [...]
arXiv:1512.05053; CERN-PH-EP-2015-328.- Geneva : CERN, 2017-04-03 - 14 p. - Published in : Eur. Phys. J. C 77 (2017) 209 Article from SCOAP3: PDF; Fulltext: arXiv:1512.05053 - PDF; CERN-PH-EP-2015-328 - PDF; Springer Open Access article: PDF;
5.
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
6.
Study of hard and electromagnetic processes at CERN-SPS energies: an investigation of the high-$\mu_{\mathbf{B}}$ region of the QCD phase diagram with NA60+ / NA60+ Collaboration
The exploration of the phase diagram of Quantum ChromoDynamics (QCD) is carried out by studying ultrarelativistic heavy-ion collisions. The energy range covered by the CERN SPS ($\sqrt{s_{\rm \scriptscriptstyle{NN}}} \sim$ 6-17 GeV) is ideal for the investigation of the region of the phase diagram corresponding to finite baryochemical potential ($\mu_{\rm B}$), and has been little explored up to now. [...]
arXiv:1812.07948.- 2021 - 8 p. - Published in : JPS Conf. Proc. 33 (2021) 011113 Fulltext: 1812.07948 - PDF; fulltext1709998 - PDF; Fulltext forom publisher: PDF;
In : J-PARC Symposium 2019, Tsukuba, Japan, 23 - 26 Sep 2019, pp.011113
7.
First demonstration of 200, 100, and 50 um pitch Resistive AC-Coupled Silicon Detectors (RSD) with 100% fill-factor for 4D particle tracking / Mandurrino, M. (INFN, Turin) ; Arcidiacono, R. (INFN, Turin ; CERN ; Piemonte Orientale U., Novara) ; Boscardin, M. (Fond. Bruno Kessler, Trento ; TIFPA-INFN, Trento) ; Cartiglia, N. (INFN, Turin) ; Dalla Betta, G.F. (INFN, Trento ; TIFPA-INFN, Trento ; Trento U.) ; Ferrero, M. (INFN, Turin ; Turin U.) ; Ficorella, F. (Fond. Bruno Kessler, Trento ; TIFPA-INFN, Trento) ; Pancheri, L. (INFN, Trento ; TIFPA-INFN, Trento ; Trento U.) ; Paternoster, G. (Fond. Bruno Kessler, Trento ; TIFPA-INFN, Trento) ; Siviero, F. (INFN, Turin ; Turin U.) et al.
We designed, produced, and tested RSD (Resistive AC-Coupled Silicon Detectors) devices, an evolution of the standard LGAD (Low-Gain Avalanche Diode) technology where a resistive n-type implant and a coupling dielectric layer have been implemented. The first feature works as a resistive sheet, freezing the multiplied charges, while the second one acts as a capacitive coupling for readout pads. [...]
arXiv:1907.03314.- 2019-09-23 - 4 p. - Published in : IEEE Electron. Dev. Lett. 40 (2019) 1780 Fulltext: PDF;
8.
Search for muoproduction of $X (3872)$ at COMPASS and indication of a new state $\widetilde{X}(3872)$ / COMPASS Collaboration
We have observed exclusive production of the exotic $X(3872)$ hadron in the reaction $\mu^+~N \rightarrow \mu^+ (J\!/\!\psi\pi^+\pi^-)\pi^{\pm}~N'$ using COMPASS data collected with incoming muons of 160~GeV/$c$ and 200~GeV/$c$ momentum. The statistical significance of the $X(3872)$ signal is 6$\sigma$. [...]
arXiv:1707.01796; CERN-EP-2017-165.- Geneva : CERN, 2018-08-10 - 7 p. - Published in : Phys. Lett. B 783 (2018) 334-340 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2017-165 - PDF; SCOAP3 Fulltext - PDF; arXiv:1707.01796 - PDF;
9.
K$^{-}$ over K$^{+}$ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy / COMPASS Collaboration
The K$^{-}$ over K$^{+}$ multiplicity ratio is measured in deep-inelastic scattering, for the first time for kaons carrying a large fraction $z$ of the virtual-photon energy. The data were obtained by the COMPASS collaboration using a 160 GeV muon beam and an isoscalar $^6$LiD target. [...]
arXiv:1802.00584; CERN-EP-2018-012.- Geneva : CERN, 2018-11-10 - 9 p. - Published in : Phys. Lett. B 786 (2018) 390-398 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2018-012 - PDF; 1802.00584 - PDF; arXiv:1802.00584 - PDF;
10.
Longitudinal double-spin asymmetry $A_1^{\rm p}$ and spin-dependent structure function $g_1^{\rm p}$ of the proton at small values of $x$ and $Q^2$ / COMPASS Collaboration
We present a precise measurement of the proton longitudinal double-spin asymmetry $A_1^{\rm p}$ and the proton spin-dependent structure function $g_1^{\rm p}$ at photon virtualities $0.006~({\rm GeV}/c)^2<Q^2 < 1~({\rm GeV}/c)^2$ in the Bjorken $x$ range of $4 \times 10^{-5} < x < 4 \times 10^{-2}$. The results are based on data collected by the COMPASS Collaboration at CERN using muon beam energies of $160~{\rm GeV}$ and $200~{\rm GeV}$. [...]
arXiv:1710.01014; CERN-EP-2017-263.- Geneva : CERN, 2018-06-10 - 9 p. Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2017-263 - PDF; arXiv:1710.01014 - PDF;

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