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1.
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The $\pi^+\pi^-$ Coulomb interaction study and its use in the data processing
/ Adeva, B. (Santiago de Compostela U.) ; Afanasyev, L. (Dubna, JINR) ; Anania, A. (INFN, Messina) ; Aogaki, S. (Bucharest, IFIN-HH) ; Benelli, A. (Prague, Tech. U.) ; Brekhovskikh, V. (Serpukhov, IHEP) ; Cechak, T. (Prague, Tech. U.) ; Chiba, M. (Tokyo Metropolitan U.) ; Chliapnikov, P. (Serpukhov, IHEP) ; Drijard, D. (Prague, Tech. U. ; CERN) et al.
In this work the Coulomb effects (Coulomb correlations) were studied using experimental $\pi^+\pi^-$ pair distributions in $Q$, the relative momentum in the pair center of mass system (c.m.s), and its projections $Q_L$ (longitudinal component) and $Q_t$ (transverse component) relative to the pair direction in the laboratory system (l.s.). The major part of the pion pairs is produced by decay of $\rho, \omega$ and $\Delta$ and other short-lived sources (Coulomb pairs). [...]
arXiv:2409.12696; CERN-EP-2023-276.-
Geneva : CERN, 2024-11-01 - 11 p.
- Published in : Phys. Rev. D 110 (2024) 092005
Draft (restricted): PDF; Fulltext: DIRAC-Coulomb-correct - PDF; 2409.12696 - PDF;
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2.
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Investigation of $K^+K^-$ pairs in the effective mass region near $2m_K$
/ DIRAC Collaboration
The DIRAC experiment at CERN investigated in the reaction $\rm{p}(24~\rm{GeV}/c) + Ni$ the particle pairs $K^+K^-, \pi^+ \pi^-$ and $p \bar{p}$ with relative momentum $Q$ in the pair system less than 100 MeV/c. Because of background influence studies, DIRAC explored three subsamples of $K^+K^-$ pairs, obtained by subtracting -- using time-of-flight (TOF) technique -- background from initial $Q$ distributions with $K^+K^-$ sample fractions more than 70%, 50% and 30%. [...]
arXiv:2204.01857; CERN-EP-2022-058.-
2022-08-01 - 18 p.
- Published in : Phys. Rev. D 106 (2022) 032006
Fulltext: PhysRevD.106.032006 - PDF; 2204.01857 - PDF;
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3.
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Large area BM@N GEM detectors
/ Galavanov, A (Dubna, JINR ; Moscow Phys. Eng. Inst.) ; Kapishin, M (Dubna, JINR) ; Karjavine, V (Dubna, JINR) ; Khabarov, S (Dubna, JINR) ; Kulish, E (Dubna, JINR) ; Lenivenko, V (Dubna, JINR) ; Makankin, A (Dubna, JINR) ; Maksymchuk, A (Dubna, JINR) ; De Oliveira, R (CERN) ; Piyadin, S (Dubna, JINR) et al.
Baryonic Matter at Nuclotron (BM@N) is a fixed target experiment at the NICA accelerator complex in JINR aimed to study nuclear matter in relativistic heavy ion collisions. Detectors based on Gas Electron Multipliers (GEM) are used for the central tracking system of the BM@N experiment, which is located inside the BM@N analyzing magnet. [...]
2020 - 6 p.
- Published in : J. Phys.: Conf. Ser. 1498 (2020) 012043
Fulltext: PDF;
In : 6th International Conference on Micro Pattern Gaseous Detectors, La Rochelle, France, 5 - 10 May 2019, pp.012043
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4.
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Performance of the BM@N GEM/CSC tracking system at the Nuclotron beam
/ Galavanov, A (Dubna, JINR ; Moscow Phys. Eng. Inst.) ; Kapishin, M (Dubna, JINR) ; Kapusniak, K (CERN) ; Karjavine, V (Dubna, JINR) ; Khabarov, S (Dubna, JINR) ; Kirushin, Y (Dubna, JINR) ; Kolesnikov, A (Dubna, JINR) ; Kulish, E (Dubna, JINR) ; Lenivenko, V (Dubna, JINR) ; Makankin, A (Dubna, JINR) et al.
BM@N (Baryonic Matter at the Nuclotron) is a fixed target experiment aimed to study nuclear matter in the relativistic heavy-ion collisions at the Nuclotron accelerator in JINR. The BM@N tracking system is based on Gas Electron Multipliers (GEM) detectors mounted inside the BM@N analyzing magnet. [...]
2019 - 6 p.
- Published in : EPJ Web Conf. 204 (2019) 07009
Fulltext: PDF;
In : 24th International Baldin Seminar on High Energy Physics Problems : Relativistic Nuclear Physics and Quantum Chromodynamics, Dubna, Russia, 17 - 22 Sep 2018, pp.07009
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5.
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Study of the GEM detector performance in BM@N experiment
/ Bazylev, Sergei (Dubna, JINR) ; Kapishin, Mikhail (Dubna, JINR) ; Kapusniak, Kacper (CERN) ; Karjavine, Vladimir (Dubna, JINR) ; Khabarov, Sergei (Dubna, JINR) ; Kolesnikov, Alexander (Dubna, JINR) ; Kulish, Elena (Dubna, JINR) ; Lenivenko, Vasilisa (Dubna, JINR) ; Makankin, Alexander (Dubna, JINR) ; Maksymchuk, Anna (Dubna, JINR) et al.
BM@N is the fixed target experiment at the accelerator complex NICA-Nuclotron aimed to study nuclear matter in the relativistic heavy ion collisions. Triple-GEM detectors were identified as appropriate for the BM@N tracking system located inside the analyzing magnet. [...]
2018 - 5 p.
- Published in : EPJ Web Conf. 177 (2018) 04004
Fulltext: PDF;
In : The XXI International Scientific Conference of Young Scientists and Specialists, Dubna, Russia, 2 - 5 Oct 2017, pp.04004
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6.
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Triple GEM Tracking Detectors for the BM@N Experiment
/ Bazylev, S (Dubna, JINR) ; Kapishin, M (Dubna, JINR) ; Kapusniak, K (CERN) ; Karjavine, V (Dubna, JINR) ; Khabarov, S (Dubna, JINR) ; Kolesnikov, A (Dubna, JINR) ; Kulish, E (Dubna, JINR) ; Lenivenko, V (Dubna, JINR) ; Makankin, A (Dubna, JINR) ; Maksymchuk, A (Dubna, JINR) et al.
BM@N (Baryonic Matter at the Nuclotron) is the fixed target experiment aimed to study nuclear matter in the relativistic heavy ion collisions at the Nuclotron accelerator in JINR. The BM@N tracking system is based on Gas Electron Multipliers (GEM) detectors, mounted inside the BM@N analyzing magnet. [...]
2018 - 7 p.
- Published in : KnE Energ. Phys. 3 (2018) 268-274
Fulltext: PDF;
In : The 3rd International Conference on Particle Physics and Astrophysics, Moscow, Russia, 2 - 5 Oct 2017, pp.268-274
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7.
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First measurement of a long-lived $\pi^+ \pi^-$ atom lifetime
/ DIRAC Collaboration
The adapted DIRAC experiment at the CERN PS accelerator observed for the first time long-lived hydrogen-like $\pi^+\pi^-$ atoms, produced by protons hitting a beryllium target. A part of these atoms crossed the gap of 96~mm and got broken up in the 2.1~\textmu{}m thick platinum foil. [...]
arXiv:1811.08659; CERN-EP-2018-281; DIRAC-PUB-2019-01.-
Geneva : CERN, 2019-03-01 - 7 p.
- Published in : Phys. Rev. Lett. 122 (2019) 082003
Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 1811.08659 - PDF; CERN-EP-2018-281 - PDF;
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8.
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GEM tracking system of the BM@N experiment
/ Baranov, D (Dubna, JINR) ; Bazylev, S (Dubna, JINR) ; Kapishin, M (Dubna, JINR) ; Kapusniak, K (CERN) ; Karjavine, V (Dubna, JINR) ; Khabarov, S (Dubna, JINR) ; Kolesnikov, A (Dubna, JINR) ; Kulish, E (Dubna, JINR) ; Lenivenko, V (Dubna, JINR) ; Makankin, A (Dubna, JINR) et al.
BM@N (Baryonic Matter at the Nuclotron) is the fixed target experiment aimed to study nuclear matter in the relativistic heavy ion collisions at the Nuclotron accelerator in JINR. Detectors based on Gas Electron multipliers (GEM) have been identified as appropriate for the BM@N tracking system, which is located inside the BM@N analyzing magnet. [...]
2017 - 9 p.
- Published in : JINST 12 (2017) C06041
In : Instrumentation for Colliding Beam Physics, Novosibirsk, Russia, 27 Feb - 3 Mar 2017, pp.C06041
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9.
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Measurement of the $\pi K$ atom lifetime and the $\pi K$ scattering length
/ DIRAC Collaboration
After having announced the statistically significant observation (5.6~$\sigma$) of the new exotic $\pi K$ atom, the DIRAC experiment at the CERN proton synchrotron presents the measurement of the corresponding atom lifetime, based on the full $\pi K$ data sample: $\tau = (5.5^{+5.0}_{-2.8}) \cdot 10^{-15}s$. By means of a precise relation ($<1\%$) between atom lifetime and scattering length, the following value for the S-wave isospin-odd $\pi K$ scattering length $a_0^{-}~=~\frac{1}{3}(a_{1/2}-a_{3/2})$ has been derived: $\left|a_0^-\right| = (0.072^{+0.031}_{-0.020}) M_{\pi}^{-1}$..
arXiv:1707.02184; CERN-EP-2017-137; DIRAC-PUB-2017-01.-
Geneva : CERN, 2017-09-19 - 18 p.
- Published in : Phys. Rev. D 96 (2017) 052002
Draft (restricted): PDF; Fulltext: CERN-EP-2017-137 - PDF; arXiv:1707.02184 - PDF; Fulltext from publisher: PDF;
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10.
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Observation of $\pi^- K^+$ and $\pi^+ K^-$ atoms
/ DIRAC Collaboration
The observation of hydrogen-like $\pi K$ atoms, consisting of $\pi^- K^+$ or $\pi^+ K^-$ mesons, is presented. The atoms have been produced by 24 GeV/$c$ protons from the CERN PS accelerator, interacting with platinum or nickel foil targets. [...]
arXiv:1605.06103; CERN-EP-2016-128; DIRAC-PUB-2016-02.-
Geneva : CERN, 2016-09-08 - 6 p.
- Published in : Phys. Rev. Lett. 117 (2016) 112001
Draft (restricted): PDF; Fulltext: arXiv:1605.06103 - PDF; 10.1103_PhysRevLett.117.112001 - PDF; PhysRevLett.117.112001 - PDF; Preprint: PDF; External link: Fulltext
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