Publications (55)
Neutron-Proton Scattering in the Context of the (2380) Resonance
P. Adlarson, W. Augustyniak, W. Bardan +105
New data on quasifree polarized neutron-proton scattering, in the region of the recently observed resonance structure, have been obtained by exclusive and kinematically compl…
Measurement of the Ar(e,e) elastic scattering cross section with a novel gas-jet target
M. Littich, L. Doria, P. Brand +35
We report on a measurement of elastic electron scattering on argon performed with a novel cryogenic gas-jet target at the Mainz Microtron accelerator MAMI. The luminosity is estima…
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 with there…
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…
Investigation of the dd -> 3He n Ï0 reaction with the FZ Jülich WASA-at-COSY facility
COSY Collaboration, P. Adlarson, W. Augustyniak +112
An exclusive measurement of the dd -> 3He n Ï0 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…
Measurement of Transverse Polarization of Electrons Emitted in Free Neutron Decay
A. Kozela, G. Ban, A. BiaÅek +8
The final analysis of the experiment determining both components of the transverse polarization of electrons (, ) emitted in the -decay of polarized, fr…
Isospin Decomposition of the Basic Double-Pionic Fusion in the Region of the ABC Effect
P. Adlarson, W. Augustyniak, W. Bardan +111
Exclusive and kinematically complete high-statistics measurements of the basic double pionic fusion reactions pn -> dpi0pi0, pn -> d pi+pi- and pp -> dpi+pi0 have been carried out…
Charge Symmetry Breaking in dd->4HeÏ0 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…
Measurement of polarization transfer in the quasi-elastic process
T. Kolar, P. Achenbach, M. Christmann +32
Polarization transfer to a bound proton in polarized electron knock-out reactions, , is a powerful tool to look for in-medium modification of…
Nuclear density dependence of polarization transfer in quasi-elastic reactions
T. Kolar, W. Cosyn, C. Giusti +52
The ratio of the transverse and longitudinal component of polarization transfer to protons in the quasi-elastic reaction, $P^{\prime}_x/P^{\prime}…
Total and differential cross sections of -production in proton-deuteron fusion for excess energies between and
P. Adlarson, W. Augustyniak, W. Bardan +90
New data on both total and differential cross sections of the production of mesons in proton-deuteron fusion to in the excess energy region $13.6\;\text{Me…
Deuteron-deuteron collision at 160 MeV
G. Khatri, W. Parol, K. Bodek +17
The experiment was carried out using BINA detector at KVI in Groningen. For the first time an extensive data analysis of the data collected in back part of the detector is presente…
Backward single-pion production in the reaction with WASA-at-COSY
P. Adlarson, W. Augustyniak, W. Bardan +89
New data on the production of single neutral pions in the reaction are presented. For fifteen proton beam momenta between $p_p=1.60\;\textrm{Ge…
Measurements of scattering observables for the break-up reaction
M. Eslami-Kalantari, H. R. Amir-Ahmadi, A. Biegun +12
High-precision measurements of the scattering observables such as cross sections and analyzing powers for the proton-deuteron elastic and break-up reactions have been performed at…
Studies of the Three-Body Breakup in Deuteron-Deuteron Collisions near the Quasi-Free Limit at 160 MeV
I. CiepaÅ, G. Khatri, K. Bodek +20
A set of differential cross section of the three-body H(,) breakup reaction at 160 MeV deuteron beam energy are presented for 147 kinematically complete configurati…
Search for Time-Reversal Violation in the beta-Decay of Polarized 8Li Nuclei
K. Bodek, W. Haeberli, R. Huber +7
The transverse polarization of electrons emitted in the beta-decay of polarized 8Li nuclei has been measured. For the time reversal violating triple correlation parameter we find R…
A comprehensive study of analyzing powers in the proton-deuteron break-up channel at 135 MeV
M. T. Bayat, H. Tavakoli-Zaniani, H. R. Amir-Ahmadi +14
A measurement of the analyzing powers for the H break-up reaction was carried out at KVI exploiting a polarized-proton beam at an energy of 135 MeV. The scatteri…
Analyzing powers in at intermediate and large scattering angles at ~MeV
M. Mohammadi-Dadkan, H. R. Amir-Ahmadi, M. T. Bayat +15
Understanding of the exact nature of three-nucleon forces is the most challenging topic in the field of nuclear physics. Three-nucleon break-up reaction is a good tool to look into…
Search for the mesic He in the reaction with the WASA-at-COSY facility
P. Adlarson, W. Augustyniak, M. Bashkanov +80
The excitation function for the reaction has been measured by WASA-at-COSY experiment with the aim of searching for $^{3}\hspace{-0.03cm}\mbox{He}$-$η…
Three-body break-up in deuteron-deuteron scattering at 65 MeV/nucleon
A. Ramazani-Moghaddam-Arani, H. R. Amir-Ahmadi, A. D. Bacher +16
We successfully identified a few final states in deuteron-deuteron scattering at 65 MeV/nucleon at KVI using a unique and advanced detection system called BINA. This facility enabl…
Precision measurements of differential cross sections and analyzing powers in elastic deuteron-deuteron scattering at 65 MeV/nucleon
R. Ramazani-Sharifabadi, A. Ramazani-Moghaddam-Arani, H. R. Amir-Ahmadi +13
We present measurements of differential cross sections and analyzing powers for the elastic 2H(~d; d)d scattering process. The data were obtained using a 130 MeV polarized deuteron…
Investigation of the quasi-free domain in deuteron-deuteron break-up using spin observables
R. Ramazani-Sharifabadi, M. T. Bayat, I. CiepaÅ +9
Precision measurements of vector and tensor analyzing powers of the break-up process for configurations in the vicinity of the quasi-free scattering reg…
Vector analyzing powers in the and channels at 135 MeV
H. Tavakoli-Zaniani, M. Eslami-Kalantari, M. T. Bayat +7
Vector analyzing powers, and , of the proton-deuteron break-up reaction have been measured by using a polarized-proton beam at 135 MeV impinging on a liquid-deuterium ta…
Three-body break-up in deuteron-deuteron scattering at 65~MeV/nucleon
A. Ramazani-Moghaddam-Arani, H. R. Amir-Ahmadi, A. D. Bacher +16
In an experiment with a 65 MeV/nucleon polarized deuteron beam on a liquid-deuterium target at KVI, several multi-body final states in deuteron-deuteron scattering were identified.…
Differential Cross Sections for Neutron-Proton Scattering in the Region of the 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 scattering performed in the…
Measurements of Branching Ratios for Decays into Charged Particles
P. Adlarson, W. Augustyniak, W. Bardan +96
The WASA-at-COSY experiment has collected events with -mesons produced via the reaction at . U…
Experimental studies of the three nucleon system dynamics in the proton induced deuteron breakup at 108 MeV
A. Åobejko, E. Stephan, I. CiepaÅ +14
The differential cross sections for the H(p,pp)n reaction have been measured for 84 angular configurations of the outgoing protons in the range of polar angles from 13 to 33 de…
Measurement of differential cross sections for deuteron-proton breakup reaction at 160 MeV
W. Parol, A. Kozela, K. Bodek +24
Differential cross sections for deuteron breakup reaction were measured for a large set of 243 geometrical configurations at the beam energy of 80 MeV/nucleon. The…
Study of Three-Nucleon Dynamics in the dp breakup collisions using the WASA detector
P. Adlarson, W. Augustyniak, W. Bardan +86
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-…
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 bee…
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 scattering have been performed in the energy region of the narrow resonance stru…
Search for the eta-mesic 4He with WASA-at-COSY detector
P. Adlarson, W. Augustyniak, W. Bardan +111
An exclusive measurement of the excitation function for the dd->3Heppi- reaction was performed at the Cooler Synchrotron COSY-Juelich with the WASA-at-COSY detection system. The da…
Measurement of the Reaction with Polarized Beam in the Region of the Resonance
P. Adlarson, W. Augustyniak, W. Bardan +91
We report on a high-statistics measurement of the most basic double pionic fusion reaction over the energy region of the resonance by use of a…
Evidence of the Coulomb force effects in the cross sections of the deuteron-proton breakup at 130 MeV
St. Kistryn, E. Stephan, B. Klos +14
High precision cross-section data of the deuteron-proton breakup reaction at 130 MeV deuteron energy are compared with the theoretical predictions obtained with a coupled-channel e…
Measurement of the Dalitz plot distribution
COSY Collaboration, P. Adlarson, W. Augustyniak +93
Using the production reactions $pd\to {}^3\mbox{He}\,Ï$ and , the Dalitz plot distribution for the decay is studied with the WASA detector at CO…
Elastic proton-deuteron scattering at intermediate energies
A. Ramazani-Moghaddam-Arani, Amir-Ahmadi, A. D. Bacher +16
Observables in elastic proton-deuteron scattering are sensitive probes of the nucleon-nucleon interaction and three-nucleon force effects. The present experimental data base for th…
Importance of d-wave contributions in the charge symmetry breaking reaction
P. Adlarson, W. Augustyniak, W. Bardan +89
This letter reports a first quantitative analysis of the contribution of higher partial waves in the charge symmetry breaking reaction using the WASA-at-…
Measurement of the Transverse Polarization of Electrons Emitted in Free Neutron Decay
A. Kozela, G. Ban, A. BiaÅek +10
Both components of the transverse polarization of electrons emitted in the beta-decay of polarized, free neutrons have been measured. The T-odd, P-odd correlation coefficient quant…
On the Production of an Isotensor Dibaryon in the Reaction
P. Adlarson, W. Augustyniak, W. Bardan +81
Exclusive measurements of the quasi-free reaction have been performed by means of collisions at = 1.2 GeV using the WASA detector setup at COSY. Tota…
Investigation of the Cross Section for dd Elastic Scattering and dd nHe Reactions at 160 MeV
I. CiepaÅ, J. KuboÅ, K. Bodek +18
Differential cross sections of H(d, d)d elastic scattering and proton transfer H(d, He)n reactions at 160 MeV beam energy have been obtained. They have been norma…
ABC Effect and Resonance Structure in the Double-Pionic Fusion to He
P. Adlarson, W. Augustyniak, W. Bardan +100
Exclusive and kinematically complete measurements of the double pionic fusion to He have been performed in the energy region of the so-called ABC effect, which denotes a pronou…
Spin-isospin selectivity in three-nucleon forces
H. Mardanpour, H. R. Amir-Ahmadi, R. Benard +21
Precision data are presented for the break-up reaction, , within the framework of nuclear-force studies. The experiment was carried out at KVI using a polari…
An Isotensor Dibaryon in the Reaction?
P. Adlarson, W. Augustyniak, W. Bardan +81
Exclusive measurements of the quasi-free reaction have been carried out at WASA@COSY by means of collisions at = 1.2 GeV. Total and differential cros…
Three-Nucleon Dynamics in the dp breakup collisions at 190 MeV/nucleon using the WASA detector at COSY-Jülich
P. Adlarson, W. Augustyniak, W. Bardan +87
The differential cross section for the H breakup reaction at deuteron beam energy of 380 MeV has been determined with high precision for 189 angular configurations o…
Search for a dark photon in the decay
COSY Collaboration, P. Adlarson, W. Augustyniak +113
The presently world largest data sample of pi0 --> gamma e+e- decays containing nearly 5E5 events was collected using the WASA detector at COSY. A search for a dark photon U produc…
Comprehensive measurements of cross sections and spin observables of the three-body break-up channel in deuteron-deuteron scattering at 65 MeV/nucleon
R. Ramazani-Sharifabadi, H. R. Amir-Ahmadi, M. T. Bayat +12
Detailed measurements of five-fold differential cross sections and a rich set of vector and tensor analyzing powers of the 2H(d; dp)n break-up process using polarized deuteron-beam…
Cross section ratio and angular distributions of the reaction p + d -> 3He + eta at 48.8 MeV and 59.8 MeV excess energy
P. Adlarson, W. Augustyniak, W. Bardan +104
We present new data for angular distributions and on the cross section ratio of the p + d -> 3He + eta reaction at excess energies of Q = 48.8 MeV and Q = 59.8 MeV. The data have b…
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 meson and $^{3}\hspace{-0.03cm}\mbox{He}$ nucleus performed using the WASA-at-COSY detector setup. In order to s…
Isoscalar Single-Pion Production in the Region of Roper and Resonances
COSY Collaboration, P. Adlarson, W. Augustyniak +90
Exclusive measurements of the quasi-free and reactions have been performed by means of collisions at = 1.2 GeV using the WASA detector se…
Search for violation in the decay with WASA-at-COSY
P. Adlarson, W. Augustyniak, W. Bardan +90
We report on the investigation of the rare decay which is of interest to study both violation in the electromagnetic interaction and t…
Measurement of the Reaction in Search for the Recently Observed Resonance Structure in and systems
P. Adlarson, W. Augustyniak, W. Bardan +110
Exclusive measurements of the quasi-free reaction have been performed by means of collisions at = 1.2 GeV using the WASA detector setup at COSY. Tota…
Systematic study of three-nucleon force effects in the cross section of the deuteron-proton breakup at 130 MeV
St. Kistryn, E. Stephan, A. Biegun +22
High precision cross-section data of the deuteron-proton breakup reaction at 130 MeV are presented for 72 kinematically complete configurations. The data cover a large region of th…
Measurement of the Dalitz plot distribution
P. Adlarson, W. Augustyniak, W. Bardan +107
Dalitz plot distribution of the decay is determined using a data sample of mesons from reaction at 1 GeV collected…
A comprehensive analysis of differential cross sections and analyzing powers in the proton-deuteron break-up channel at 135 MeV
H. Tavakoli-Zaniani, M. Eslami-Kalantari, H. R. Amir-Ahmadi +14
A selection of measured cross sections and vector analyzing powers, Ax and Ay, are presented for the pd break-up reaction. The data are taken with a polarized proton beam energy of…
Measurement of the Reaction in Search for the Recently Observed Resonance
P. Adlarson, W. Augustyniak, W. Bardan +99
Exclusive measurements of the quasi-free reaction have been performed by means of collisions at = 2.27 GeV using the WASA detector setup at COSY. Tot…