H. Calén
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View article: Particle physics at the European Spallation Source
Particle physics at the European Spallation Source Open
View article: Design of an optimized nested-mirror neutron reflector for a NNBAR experiment
Design of an optimized nested-mirror neutron reflector for a NNBAR experiment Open
The NNBAR experiment for the European Spallation Source will search for free neutrons converting to antineutrons with an expected sensitivity improvement of three orders of magnitude compared to the last such search. This paper describes b…
View article: The development of the NNBAR experiment
The development of the NNBAR experiment Open
The NNBAR experiment for the European Spallation Source will search for free neutrons converting to antineutrons with a sensitivity improvement of three orders of magnitude compared to the last such search. This paper describes progress to…
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\nkinematically complete high-statistics measurements of quasifree polarized\n$\\vec{n}p$ scattering performed in the energy region of the $d^*(2380)$\ndibaryon resonance co…
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
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: 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: 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: 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
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
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: Measurement of the ω→π+π−π0 Dalitz plot distribution
Measurement of the ω→π+π−π0 Dalitz plot distribution Open
Using the production reactions pd -> He-3 omega and pp -> pp omega, the Dalitz plot distribution for the omega -> pi(+)pi(-)pi(0)decay is studied with the WASA detector at COSY, based on a combined data sample of (4.408 +/- 0.042)…
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 …
Search for η-mesic in the and reactions with the WASA-at-COSY facility Open
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: Search for an isospin I= 3 dibaryon
Search for an isospin I= 3 dibaryon Open
View article: Measurement of the np→npπ0π0 reaction in search for the recently observed d⁎(2380) resonance
Measurement of the np→npπ0π0 reaction in search for the recently observed d⁎(2380) resonance Open
View article: ABC effect and resonance structure in the double-pionic fusion to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>
ABC effect and resonance structure in the double-pionic fusion to Open
Exclusive and kinematically complete measurements of the double pionic fusion to He-3 have been performed in the energy region of the so-called ABC effect, which denotes a pronounced low-mass enhancement in the pi pi-invariant mass spectru…