W. Eyrich
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View article: Corrigendum to “Odd and even partial waves of ηπ− and η′π− in π−p → η(′)π−p at 191 GeV/c” [Phys. Lett. B 740 (2015) 303–311]
Corrigendum to “Odd and even partial waves of ηπ− and η′π− in π−p → η(′)π−p at 191 GeV/c” [Phys. Lett. B 740 (2015) 303–311] Open
In Fig. 5 on p. 311 of our Phys. Lett. B 740 (2015) 303 an adjustment by 180∘ is required for the phases with respect to the L=2,M=1 wave, of the following waves: L=1,3,5 with M=1, and L=2 with M=2. After this correction (Fig. 5 (corrected…
View article: Search for the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>η</mml:mi></mml:math> mesic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>He</mml:mi><mml:mprescripts/><mml:none/><mml:mn>3</mml:mn></mml:mmultiscripts></mml:math> in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>p</mml:mi><mml:mi>d</mml:mi><mml:mo>→</mml:mo><mml:mi>d</mml:mi><mml:mi>p</mml:mi><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:mrow></mml:math> reaction with the WASA-at-COSY facility
Search for the mesic in the reaction with the WASA-at-COSY facility Open
The excitation function for the $pd\\rightarrow$ $d p \\pi^{0}$ reaction has\nbeen measured by WASA-at-COSY experiment with the aim of searching for\n$^{3}\\hspace{-0.03cm}\\mbox{He}$-$\\eta$ mesic nuclei. The measurement in the\nvicinity …
View article: Differential cross sections for neutron-proton scattering in the region of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>d</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:mrow><mml:mo>(</mml:mo><mml:mn>2380</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math> dibaryon resonance
Differential cross sections for neutron-proton scattering in the region of the dibaryon resonance Open
Differential cross sections have been extracted from exclusive and kinematically complete high-statistics measurements of quasifree polarized (n) over barp scattering performed in the energy region of the d* (2380) dibaryon resonance cover…
View article: Corrigendum to “Isoscalar single-pion production in the region of Roper and d⁎(2380) resonances” [Phys. Lett. B 774 (2017) 599]
Corrigendum to “Isoscalar single-pion production in the region of Roper and d⁎(2380) resonances” [Phys. Lett. B 774 (2017) 599] Open
Recently a two-step process has been proposed for the double-pionic fusion to deuterium pn(I=0)→dπ+π−. Its calculation is solely based on total cross section data for the two sequential single-pion production steps pn(I=0)→ppπ− followed by…
View article: Three-nucleon dynamics in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="italic">dp</mml:mi></mml:math> breakup collisions using the WASA detector at COSY-Jülich
Three-nucleon dynamics in breakup collisions using the WASA detector at COSY-Jülich Open
Differential cross section for the 1H(d,pp)n breakup reaction at deuteron beam energy of 340 MeV has been measured with the use of WASA detector at COSY-Juelich. The set of proton-proton coincidences registered at Forward Detector has been…
View article: Erratum to: Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons
Erratum to: Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons Open
View article: Search for η mesic 3He with the WASA-at-COSY facility in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:mi>p</mml:mi><mml:mi>d</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow/><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup><mml:mtext>He</mml:mtext><mml:mn>2</mml:mn><mml:mi>γ</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg"><mml:mi>p</mml:mi><mml:mi>d</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow/><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup><mml:mtext>He</mml:mtext><mml:mn>6</mml:mn><mml:mi>γ</mml:mi></mml:math> reactions
Search for η mesic 3He with the WASA-at-COSY facility in the and reactions Open
View article: Search for polarized antiproton production
Search for polarized antiproton production Open
View article: Examination of the production of an isotensor dibaryon in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>p</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:mi>p</mml:mi><mml:mi>p</mml:mi><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:math> reaction
Examination of the production of an isotensor dibaryon in the reaction Open
The quasifree pp -> pp pi(+)pi(-) reaction has been measured by means of pd collisions at T-p = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections…
View article: Drift chamber calibration and particle identification in the P-349 experiment
Drift chamber calibration and particle identification in the P-349 experiment Open
The goal of the P-349 experiment is to test whether 3.5 GeV/c antiprotons produced in high-energy proton-proton collisions are polarized in view of the preparation of a polarized antiproton beam. In this article, we present the details of …
View article: Polarization analysis of <i>p</i> produced in pA collisions
Polarization analysis of <i>p</i> produced in pA collisions Open
A quite simple procedure for the generation of a polarized antiproton beam could be worked out if antiprotons are produced with some polarization. In order to investigate this possibility measurements of the polarization of produced antipr…
View article: Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons
Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons Open
View article: Determination of N* amplitudes from associated strangeness production in p+p collisions
Determination of N* amplitudes from associated strangeness production in p+p collisions Open
View article: Isotensor Dibaryon in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>p</mml:mi><mml:mi>p</mml:mi><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> Reaction?
Isotensor Dibaryon in the Reaction? Open
Exclusive measurements of the quasifree pp→ppπ^{+}π^{-} reaction have been carried out at WASA@COSY by means of pd collisions at T_{p}=1.2 GeV. Total and differential cross sections have been extracted covering the energy region T_{p}=1.08…
View article: Search for C violation in the decay η → π0e+e− with WASA-at-COSY
Search for C violation in the decay η → π0e+e− with WASA-at-COSY Open
We report on the search for the rare decay eta -> pi(0)e(+)e(-) which is of interest to study C violation in the electromagnetic interaction which would indicate contributions from physics beyond the Standard Model, since the allowed de…
View article: Total and differential cross sections of η-production in proton–deuteron fusion for excess energies between Q = 13 MeV and Q = 81 MeV
Total and differential cross sections of η-production in proton–deuteron fusion for excess energies between Q = 13 MeV and Q = 81 MeV Open
New data on both total and differential cross sections of the production of\n$\\eta$ mesons in proton-deuteron fusion to ${}^3\\text{He}\\,\\eta$ in the excess\nenergy region $13.6\\;\\text{MeV}\\leq Q_\\eta \\leq 80.9\\;\\text{MeV}$ are\n…
View article: Importance of d-wave contributions in the charge symmetry breaking reaction <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>d</mml:mi><mml:mi>d</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow/><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msup><mml:mtext>He</mml:mtext><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:math>
Importance of d-wave contributions in the charge symmetry breaking reaction Open
View article: Spin Dependence of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi></mml:math> Meson Production in Proton-Proton Collisions Close to Threshold
Spin Dependence of Meson Production in Proton-Proton Collisions Close to Threshold Open
Taking advantage of the high acceptance and axial symmetry of the WASA-at-COSY detector, and the high polarization degree of the proton beam of COSY, the reaction p[over →]p→ppη has been measured close to threshold to explore the analyzing…
View article: Backward single-pion production in the $ pd\\rightarrow {}^{3}\\mathrm{He} \\pi^{0}$pd→ 3 He π 0 reaction with WASA-at-COSY
Backward single-pion production in the $ pd\\rightarrow {}^{3}\\mathrm{He} \\pi^{0}$pd→ 3 He π 0 reaction with WASA-at-COSY Open
View article: Isoscalar single-pion production in the region of Roper and d⁎(2380) resonances
Isoscalar single-pion production in the region of Roper and d⁎(2380) resonances Open
View article: Final COMPASS results on the deuteron spin-dependent structure function<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msubsup><mml:mrow><mml:mi>g</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow><mml:mi mathvariant="normal">d</mml:mi></mml:mrow></mml:msubsup></mml:math>and the Bjorken sum rule
Final COMPASS results on the deuteron spin-dependent structure functionand the Bjorken sum rule Open
View article: Isoscalar Single-Pion Production in the Region of Roper and $d^*(2380)$ Resonances
Isoscalar Single-Pion Production in the Region of Roper and $d^*(2380)$ Resonances Open
Exclusive measurements of the quasi-free $pn \to ppπ^-$ and $pp \to ppπ^0$ reactions have been performed by means of $pd$ collisions at $T_p$ = 1.2 GeV using the WASA detector setup at COSY. Total and differential cross sections have been …
View article: Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target
Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target Open
Search for η-mesic in the and reactions with the WASA-at-COSY facility Open
View article: Drift Chamber Calibration and Track Reconstruction in the P349 Antiproton Polarization Experiment
Drift Chamber Calibration and Track Reconstruction in the P349 Antiproton Polarization Experiment Open
The goal of the P349 experiment is to test whether the antiproton production process can be itself a source of antiproton polarization. In this article, we present the motivation and details of the performed measurement. We report on the s…
View article: Measurements of branching ratios for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>η</mml:mi></mml:math> decays into charged particles
Measurements of branching ratios for decays into charged particles Open
The WASA-at-COSY experiment has collected 3 x 10(7) events with eta mesons produced via the reaction pd -> He-3 eta at T = 1.0 GeV. Using this data set, we evaluate the branching ratios of the decays eta -> pi(+)pi(-)gamma, eta -> e(+)e(-)…
View article: Measurement of polarization observables of the associated strangeness production in proton proton interactions
Measurement of polarization observables of the associated strangeness production in proton proton interactions Open
View article: Search for an isospin I= 3 dibaryon
Search for an isospin I= 3 dibaryon Open
View article: Measurement of polarization observables of the associated strangeness production in proton proton interactions
Measurement of polarization observables of the associated strangeness production in proton proton interactions Open
The Lambda polarization, the analyzing power, and the Lambda spin transfer coefficient of the reaction pp -> p K+ Lambda were measured at beam momenta of 2.70 GeV/c and 2.95 GeV/c, corresponding to excess energies of 122 MeV and 204 MeV. W…
View article: Extracting the depolarization coefficient D from data measured with a full acceptance detector
Extracting the depolarization coefficient D from data measured with a full acceptance detector Open