A. Roy

activity

20072020

most citedEvidence for a New Resonance from Polarized Neutron-Proton Scattering

179 citations · 1.7k across the 38 of their papers we have counts for

collaborators

39 papers

nucl-ex2020★ 10 cited

Search for the $η$ mesic $^{3}$ He in the $p d \to d p π^{0}$ reaction with the WASA-at-COSY facility

P. Adlarson, W. Augustyniak, M. Bashkanov +80

The excitation function for the $p d \to$ $d p π^{0}$ reaction has been measured by WASA-at-COSY experiment with the aim of searching for $^{3}\hspace{-0.03cm}\mbox{He}$- $η$ …

hep-ex2020★ 7 cited

Differential Cross Sections for Neutron-Proton Scattering in the Region of the $d^{*} (2380)$ Dibaryon Resonance

P. Adlarson, W. Augustyniak, W. Bardan +102

Differential cross sections have been extracted from exclusive and kinematically complete high-statistics measurements of quasifree polarized $n p$ scattering performed in the…

nucl-ex2019★ 9 cited

Search for eta mesic 3He with the WASA-at-COSY facility in the pd-> 3He 2gamma and pd-> 3He 6gamma reactions

P. Adlarson, W. Augustyniak, W. Bardan +81

We report on the experimental search for the bound state of an $η$ meson and $^{3}\hspace{-0.03cm}\mbox{He}$ nucleus performed using the WASA-at-COSY detector setup. In order to se…

nucl-ex2018★ 1 cited

Backward single-pion production in the $pd \to^{3} He π^{0}$ reaction with WASA-at-COSY

P. Adlarson, W. Augustyniak, W. Bardan +89

New data on the production of single neutral pions in the $p d \to^{3} He π^{0}$ reaction are presented. For fifteen proton beam momenta between $p_p=1.60\;\textrm{GeV…

nucl-ex2018★ 3 cited

On the Production of an Isotensor Dibaryon in the $pp \to pp π^{+} π^{-}$ Reaction

P. Adlarson, W. Augustyniak, W. Bardan +81

Exclusive measurements of the quasi-free $pp \to pp π^{+} π^{-}$ reaction have been performed by means of $p d$ collisions at $T_{p}$ = 1.2 GeV using the WASA detector setup at COSY. Total…

hep-ex2018★ 9 cited

Search for $C$ violation in the decay $η \to π^{0} + e^{+} + e^{-}$ with WASA-at-COSY

P. Adlarson, W. Augustyniak, W. Bardan +90

We report on the investigation of the rare decay $η \to π^{0} + e^{+} + e^{-}$ which is of interest to study both $C$ violation in the electromagnetic interaction and to…

nucl-ex2017★ 2 cited

Spin dependence of η meson production in proton-proton collisions close to threshold

P. Adlarson, W. Augustyniak, W. Bardan +88

Taking advantage of the high acceptance and axial symmetry of the WASA-at-COSY detector, and the high degree of the polarized proton beam of COSY, the reaction pp{\to} ppη has been…

nucl-ex2017★ 1 cited

Isoscalar Single-Pion Production in the Region of Roper and $d^{*} (2380)$ Resonances

COSY Collaboration, P. Adlarson, W. Augustyniak +90

Exclusive measurements of the quasi-free $p n \to pp π^{-}$ and $pp \to pp π^{0}$ reactions have been performed by means of $p d$ collisions at $T_{p}$ = 1.2 GeV using the WASA detector setu…

nucl-ex2016★ 37 cited

Search for eta-mesic 4He in the dd->3He n pi0 and dd->3He p pi- reactions with the WASA-at-COSY facility

P. Adlarson, W. Augustyniak, W. Bardan +90

The search for 4He-eta bound states was performed with the WASA-at-COSY facility via the measurement of the excitation function for the dd->3He n pi0 and dd->3He p pi- processes. T…

nucl-ex2016★ 20 cited

Measurement of the $ω \to π^{+} π^{-} π^{0}$ Dalitz plot distribution

COSY Collaboration, P. Adlarson, W. Augustyniak +93

Using the production reactions $pd\to {}^3\mbox{He}\,ω$ and $pp \to pp ω$ , the Dalitz plot distribution for the $ω \to π^{+} π^{-} π^{0}$ decay is studied with the WASA detector at COSY, ba…

nucl-ex2016★ 32 cited

Feasibility study for the measurement of $π N$ TDAs at PANDA in $p ˉ p \to J / ψ π^{0}$

PANDA Collaboration, B. Singh, W. Erni +508

The exclusive charmonium production process in $p ˉ p$ annihilation with an associated $π^{0}$ meson $p ˉ p \to J / ψ π^{0}$ is studied in the framework of QCD collinear factorizatio…

nucl-ex2016★ 17 cited

Search for an Isospin I =3 Dibaryon

P. Adlarson, W. Augustyniak, W. Bardan +91

Various theoretical calculations based on QCD or hadronic interactions predict that in addition to the recently observed dibaryon resonance $d^{*} (2380)$ with $I (J^{P}) = 0 (3^{+})$ there…

hep-ex2016★ 4 cited

Feasibility studies of time-like proton electromagnetic form factors at PANDA at FAIR

PANDA Collaboration, B. Singh, W. Erni +502

Simulation results for future measurements of electromagnetic proton form factors at \PANDA (FAIR) within the PandaRoot software framework are reported. The statistical precision w…

nucl-ex2015★ 18 cited

Measurements of Branching Ratios for $η$ Decays into Charged Particles

P. Adlarson, W. Augustyniak, W. Bardan +96

The WASA-at-COSY experiment has collected $3 \times 1 0^{7}$ events with $η$ -mesons produced via the reaction $p d \to^{3} He η$ at $T = 1.0 GeV$ . Usi…

nucl-ex2015★ 76 cited

High statistics study of the reaction $γ p \to p 2 π^{0}$

V. Sokhoyan, E. Gutz, V. Crede +62

The photoproduction of 2 $π^{0}$ mesons off protons was studied with the Crystal Barrel/TAPS experiment at the electron accelerator ELSA in Bonn. The energy of photons produced in a r…

nucl-ex2014★ 76 cited

Measurement of the $n p \to n p π^{0} π^{0}$ Reaction in Search for the Recently Observed $d^{*} (2380)$ Resonance

P. Adlarson, W. Augustyniak, W. Bardan +99

Exclusive measurements of the quasi-free $n p \to n p π^{0} π^{0}$ reaction have been performed by means of $d p$ collisions at $T_{d}$ = 2.27 GeV using the WASA detector setup at COSY. Total…

nucl-ex2014★ 34 cited

ABC Effect and Resonance Structure in the Double-Pionic Fusion to $^{3}$ He

P. Adlarson, W. Augustyniak, W. Bardan +100

Exclusive and kinematically complete measurements of the double pionic fusion to $^{3}$ He have been performed in the energy region of the so-called ABC effect, which denotes a pronou…

nucl-ex2014★ 77 cited

Neutron-Proton Scattering in the Context of the $d^{*}$ (2380) Resonance

P. Adlarson, W. Augustyniak, W. Bardan +105

New data on quasifree polarized neutron-proton scattering, in the region of the recently observed $d^{*}$ resonance structure, have been obtained by exclusive and kinematically compl…

nucl-ex2014★ 9 cited

Charge Symmetry Breaking in dd->4Heπ0 with WASA-at-COSY

COSY Collaboration, P. Adlarson, W. Augustyniak +102

Charge symmetry breaking (CSB) observables are a suitable experimental tool to examine effects induced by quark masses on the nuclear level. Previous high precision data from TRIUM…

hep-ex2014★ 29 cited

Measurement of the $η \to π^{+} π^{-} π^{0}$ Dalitz plot distribution

P. Adlarson, W. Augustyniak, W. Bardan +107

Dalitz plot distribution of the $η \to π^{+} π^{-} π^{0}$ decay is determined using a data sample of $1.2 \cdot 1 0^{7}$ $η$ mesons from $p d \to^{3} He η$ reaction at 1 GeV collected by the…

nucl-ex2014★ 97 cited

High statistics study of the reaction $γ p \to p π^{0} η$

E. Gutz, the CBELSA/TAPS Collaboration

Photoproduction off protons of the $p π^{0} η$ three-body final state was studied with the Crystal Barrel/TAPS detector at the electron stretcher accelerator ELSA at Bonn for incident…

nucl-ex2014★ 179 cited

Evidence for a New Resonance from Polarized Neutron-Proton Scattering

P. Adlarson, W. Augustyniak, W. Bardan +104

Exclusive and kinematically complete high-statistics measurements of quasifree polarized $n p$ scattering have been performed in the energy region of the narrow resonance stru…

nucl-ex2013★ 78 cited

Measurement of the $p n \to pp π^{0} π^{-}$ Reaction in Search for the Recently Observed Resonance Structure in $d π^{0} π^{0}$ and $d π^{+} π^{-}$ systems

P. Adlarson, W. Augustyniak, W. Bardan +110

Exclusive measurements of the quasi-free $p n \to pp π^{0} π^{-}$ reaction have been performed by means of $p d$ collisions at $T_{p}$ = 1.2 GeV using the WASA detector setup at COSY. Total…

nucl-ex2013★ 6 cited

Investigation of the dd -> 3He n π0 reaction with the FZ Jülich WASA-at-COSY facility

COSY Collaboration, P. Adlarson, W. Augustyniak +112

An exclusive measurement of the dd -> 3He n π0 reaction was carried at a beam momentum of p = 1.2 GeV/c using the WASA-at-COSY facility. For the first time data on the total cross…

Search for the η mesic 3He in the pd→dpπ0 reaction with the WASA-at-COSY facility

Differential Cross Sections for Neutron-Proton Scattering in the Region of the d∗(2380) Dibaryon Resonance

Search for eta mesic 3He with the WASA-at-COSY facility in the pd-> 3He 2gamma and pd-> 3He 6gamma reactions

Backward single-pion production in the pd→3Heπ0 reaction with WASA-at-COSY

On the Production of an Isotensor Dibaryon in the pp→ppπ+π− Reaction

Search for C violation in the decay η→π0+e++e− with WASA-at-COSY

Spin dependence of η meson production in proton-proton collisions close to threshold

Isoscalar Single-Pion Production in the Region of Roper and d∗(2380) Resonances

Search for eta-mesic 4He in the dd->3He n pi0 and dd->3He p pi- reactions with the WASA-at-COSY facility

Measurement of the ω→π+π−π0 Dalitz plot distribution

Feasibility study for the measurement of πN TDAs at PANDA in pˉ​p→J/ψπ0