Witold Wojciech Przygoda
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View article: Hadron production and propagation in pion-induced reactions on nuclei
Hadron production and propagation in pion-induced reactions on nuclei Open
Hadron production ( $$\pi ^\pm $$ , proton, $$\Lambda $$ , $$K_S^0$$ , $$K^\pm $$ ) in $$\pi ^- + \textrm{C}$$ and $$\pi ^- + \textrm{W}$$ collisions is investigated at an incident pion beam momentum of $$1.7~\…
View article: Inclusive e$^+$e$^-$ production in collisions of pions with protons and nuclei in the second resonance region of baryons
Inclusive e$^+$e$^-$ production in collisions of pions with protons and nuclei in the second resonance region of baryons Open
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 …
View article: Hadron Production and Propagation in Pion-Induced Reactions on Nuclei
Hadron Production and Propagation in Pion-Induced Reactions on Nuclei Open
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 HADE…
View article: Technical design report for the endcap disc DIRC <sup>*</sup>
Technical design report for the endcap disc DIRC <sup>*</sup> Open
PANDA (anti-proton annihiliation at Darmstadt) is planned to be one of the four main experiments at the future international accelerator complex FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany. It is going to address …
View article: HADES and the QCD phase diagram
HADES and the QCD phase diagram Open
We discuss new experimental results on the mechanisms of light nuclei production, fluctuationsof conserved charges and the emissivity of matter, studied with HADES at SIS18. The multi-differential representations of hadron and dilepton spe…
View article: Proton, deuteron and triton flow measurements in Au+Au collisions at\n $\\sqrt{s_{NN}} = 2.4$ GeV
Proton, deuteron and triton flow measurements in Au+Au collisions at\n $\\sqrt{s_{NN}} = 2.4$ GeV Open
High precision measurements of flow coefficients $v_{n}$ ($n = 1 - 4$) for\nprotons, deuterons and tritons relative to the first-order spectator plane have\nbeen performed in Au+Au collisions at $\\sqrt{s_{NN}} = 2.4$ GeV with the\nHigh-Ac…
View article: First measurement of massive virtual photon emission from N* baryon resonances
First measurement of massive virtual photon emission from N* baryon resonances Open
First information on the time-like electromagnetic structure of baryons in the second resonance region has been obtained from measurements of dielectron (e+ e-) invariant-mass and angular distributions in the quasi-free reaction $π-$ p $\r…
View article: Technical design report for the endcap disc DIRC $^{*}$
Technical design report for the endcap disc DIRC $^{*}$ Open
PANDA (anti-proton annihiliation at Darmstadt) is planned to be one of the four main experiments at the future international accelerator complex FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany. It is going to address …
View article: New results on light nuclei, hyperons and hypernuclei from HADES (HADES collaboration)
New results on light nuclei, hyperons and hypernuclei from HADES (HADES collaboration) Open
In March 2019 the HADES experiment recorded 14 billion Ag+Ag collisions at √ s NN = 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…
View article: Exploring time like tranistions in <i>pp, πp</i> and <i>AA</i> reactions with HADES
Exploring time like tranistions in <i>pp, πp</i> and <i>AA</i> reactions with HADES Open
Radiative transition of an excited baryon to a nucleon with emission of a virtual massive photon converting to dielectron pair (Dalitz decays) provides important information about baryon-photon coupling at low q 2 in timelike region. A pro…
View article: Technical Design Report for the PANDA Endcap Disc DIRC
Technical Design Report for the PANDA Endcap Disc DIRC Open
PANDA (anti-Proton ANnihiliation at DArmstadt) is planned to be one of the four main experiments at the future international accelerator complex FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany. It is going to address …
View article: Strong Absorption of Hadrons with Hidden and Open Strangeness in Nuclear Matter
Strong Absorption of Hadrons with Hidden and Open Strangeness in Nuclear Matter Open
We present the first observation of K^{-} and ϕ absorption within nuclear matter by means of π^{-}-induced reactions on C and W targets at an incident beam momentum of 1.7 GeV/c studied with HADES at SIS18/GSI. The double ratio (K^{-}/K^{+…
View article: Partial wave analysis of HADES data for two-pion production in pion-nucleon reactions
Partial wave analysis of HADES data for two-pion production in pion-nucleon reactions Open
Pion beams are perfect tools to probe resonance excitations at a fixed energy, thus properties of baryonic resonances and their coupling channels can be studied. The HADES Collaboration performed a systematic scan around the second resonan…
View article: "Table 1 - Multiplicities and effective Temperatures" of "Sub-threshold production of K$^{0}_{s}$ mesons and ${\Lambda}$ hyperons in Au(1.23A GeV)$+$Au"
"Table 1 - Multiplicities and effective Temperatures" of "Sub-threshold production of K$^{0}_{s}$ mesons and ${\Lambda}$ hyperons in Au(1.23A GeV)$+$Au" Open
$K^{0}_{S}$ and $\Lambda$ multiplicities in full phase space and inverse slopes at mid-rapidity $T_{Eff}$ for a given centrality.
View article: Time-Like Baryon Transitions studies with HADES
Time-Like Baryon Transitions studies with HADES Open
The HADES collaboration uses the e + e − production as a probe of the resonance matter produced in collisions at incident energies of 1-3.5 GeV/nucleon at GSI. Elementary reactions provide useful references for these studies and give infor…
View article: Partial wave analysis of HADES data for two-pion production in pion-nucleon reactions
Partial wave analysis of HADES data for two-pion production in pion-nucleon reactions Open
Pion beams are perfect tools to probe resonance excitations at a fixed energy, thus properties of baryonic resonances and their coupling channels can be studied. The HADES Collaboration performed a systematic scan around the second resonan…
View article: Resonance production and decays in nucleon-nucleon collisions with HADES
Resonance production and decays in nucleon-nucleon collisions with HADES Open
The High Acceptance Di-Electron Spectrometer (HADES), installed at GSI, allows to study both hadron and rare dilepton production in a fixed target experiments in the beam energy range of a few GeV per nucleon, reaching up to 4.5 GeV for a …