Accès ouvert
2025
article
OpenAlex
R. Abou Yassine, J. Adamczewski-Musch, O. Arnold, E. T. Atomssa et autres
Inclusive ${e}^{+}{e}^{\ensuremath{-}}$ production has been studied with HADES in ${\ensuremath{\pi}}^{\ensuremath{-}}+p, {\ensuremath{\pi}}^{\ensuremath{-}} +$ C, and ${\ensuremath{\pi}}^{\ensuremath{-}}+{\mathrm{CH}}_{2}$ reactions, using the GSI pion beam at $\sqrt{{s}_{\ensuremath{\pi}p}}=1.49$ GeV. Invariant mass and transverse momentum distributions have been measured and reveal contributions from Dalitz decays of ${\ensuremath{\pi}}^{0}, \ensuremath{\eta}$ …
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Accès ouvert
2024
article
OpenAlex
R. Abou Yassine, J. Adamczewski-Musch, O. Arnold, E. T. Atomssa et autres
Abstract Hadron production ( $$\pi ^\pm $$ π ± , proton, $$\Lambda $$ Λ , $$K_S^0$$ K S 0 , $$K^\pm $$ K ± ) in $$\pi ^- + \textrm{C}$$ π - + C and $$\pi ^- + \textrm{W}$$ π - + …
fr, de, pt, cz, pl, es, cy
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Accès ouvert
2024
article
OpenAlex
R. Abou Yassine, O. Arnold, M. Becker, P. Bergmann et autres
Abstract The production of $$\Sigma ^{0}$$ Σ 0 hyperons in proton proton collisions at a beam kinetic energy of 3.5 GeV impinging on a liquid hydrogen target was investigated using data collected with the HADES setup. The total production cross section is …
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Accès ouvert
2023
preprint
OpenAlex
R. Abou Yassine, J. Adamczewski-Musch, O. Arnold, E. T. Atomssa et autres
Inclusive e$^+$e$^-$ production has been studied with HADES in $π^-$ + p, $π^-$ + C and $π^- + \mathrm{CH}_2$ reactions, using the GSI pion beam at $\sqrt{s_{πp}}$ = 1.49 GeV. Invariant mass and transverse momentum distributions have been measured and reveal contributions …
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Accès ouvert
2023
article
OpenAlex
J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas et autres
Abstract High-precision measurements of flow coefficients $$v_{n}$$ v n ( $$n = 1 - 4$$ n = 1 - 4 ) for protons, deuterons and tritons relative to the first-order spectator plane have been performed in Au+Au collisions at $$\sqrt{s_{_{{\text {NN}}}}}= 2.4$$ …
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Accès ouvert
2023
preprint
OpenAlex
R. Abou Yassine, J. Adamczewski-Musch, O. Arnold, E. T. Atomssa et autres
Hadron production ($π^\pm$, proton, $Λ$, $K_S^0$, $K^\pm$) in $π^- + \mathrm{C}$ and $π^- + \mathrm{W}$ collisions is investigated at an incident pion beam momentum of $1.7~\mathrm{GeV}/c$. This comprehensive set of data measured with HADES at SIS18/GSI significantly extends the existing world data …
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Accès ouvert
2022
article
OpenAlex
J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas et autres
Abstract In nuclear collisions the incident protons generate a Coulomb field which acts on produced charged particles. The impact of these interactions on charged-pion transverse-mass and rapidity spectra, as well as on pion–pion momentum correlations is investigated in Au + Au collisions …
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Accès ouvert
2022
conference-paper
OpenAlex
R. Abou Yassine, J. Adamczewski-Musch, M. Becker, Philip J. Bergmann et autres
In March 2019 the HADES experiment recorded 14 billion Ag+Ag collisions at √sNN = 2.55 GeV as a part of the FAIR phase-0 physics program. In this contribution, we present and investigate our capabilities to reconstruct and analyze weakly decaying strange hadrons …
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Accès ouvert
2021
article
OpenAlex
J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas et autres
In this letter we report the first multi-differential measurement of correlated pion-proton pairs from 2 billion Au+Au collisions at sNN=2.42 GeV collected with HADES. In this energy regime the population of Δ(1232) resonances plays an important role in the way energy is …
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Accès ouvert
2020
article
OpenAlex
J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas et autres
Flow coefficients v_{n} of the orders n=1-6 are measured with the High-Acceptance DiElectron Spectrometer (HADES) at GSI for protons, deuterons, and tritons as a function of centrality, transverse momentum, and rapidity in Au+Au collisions at sqrt[s_{NN}]=2.4 GeV. Combining the information from the …
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Accès ouvert
2020
article
OpenAlex
J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas et autres
The QCD critical endpoint (CEP) is a very distinct feature of the phase diagram of nuclear matter, but it can presently not be located from first-principle calculations; experimental observations are needed to constrain its position. The HADES Collaboration at GSI measured cumulants …
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Accès ouvert
2020
article
OpenAlex
J. Adamczewski-Musch, O. Arnold, E. T. Atomssa, C. Behnke et autres
Pion-induced reactions provide unique opportunities for an unambiguous description of baryonic resonances and their coupling channels by means of a partial-wave analysis. Using the secondary pion beam at SIS18, the two-pion production in the second resonance region has been investigated to unravel …
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