407 citations · 2.1k across the 30 of their papers we have counts for
24 papers · 1 filter
ABC Effect in Basic Double-Pionic Fusion --- Observation of a new resonance?
P. Adlarson, C. Adolph, W. Augustyniak +116
We report on a high-statistics measurement of the basic double pionic fusion reaction over the energy region of the so-called ABC effect, a pronounced low-mass enh…
Exclusive Measurement of the Reaction at 1.1 GeV
M. Bashkanov, D. Bogoslawsky, H. Calen +36
First exclusive data for the reaction have been obtained at CELSIUS with the WASA detector setup at a beam energy of = 1.1 GeV. Total and differential cross…
Delta Delta Excitation in Proton-Proton Induced pi0pi0 Production
T. Skorodko, M. Bashkanov, D. Bogoslawsky +37
Exclusive measurements of the reaction have been performed at CELSIUS/WASA at energies from threshold up to = 1.3 GeV. Total and differential cross sections…
Production of eta and 3pi mesons in the pd->3HeX reaction at 1360 and 1450 MeV
K. Schoenning, Chr. Bargholtz, M. Bashkanov +43
The cross sections of the pd -> 3He eta, pd -> 3He pi0 pi0 pi0 and pd -> 3He pi+ pi- pi0 reactions have been measured at beam kinetic energies T_p= 1360 MeV and T_p= 1450 MeV using…
Exclusive Measurements of pp -> dpi+pi0: Double-Pionic Fusion without ABC Effect
F. Kren, M. Bashkanov, D. Bogoslawsky +37
Exclusive measurements of the reaction pp -> dpi+pi0 have been carried out at T_p = 1.1 GeV at the CELSIUS storage ring using the WASA detector. The isovector pi+pi0 channel exhibi…
Two-Pion Production in Proton-Proton Collisions -- Experimental Total Cross Sections and their Isospin Decomposition
T. Skorodko, M. Bashkanov, D. Bogoslawsky +37
The two-pion production in pp-collisions has been investigated at CELSIUS in exclusive measurements from threshold up to = 1.36 GeV. Total and differential cross sections hav…
Exclusive measurement of two-pion production in the dd --> 4Hepipi reaction
S. Keleta, Chr. Bargholtz, M. Bashkanov +46
The results from the first kinematically complete measurement of the dd --> 4Hepipi reaction are reported. The aim was to investigate a long standing puzzle regarding the origin of…
Production of the omega meson in the pd --> 3He omega reaction at 1450 MeV and 1360 MeV
K. Schonning, Chr. Bargholtz, M. Bashkanov +46
The production of mesons in the He reaction has been studied at two energies near the kinematic threshold, MeV and MeV. The differential c…
Measurement of the eta->3pi0 Dalitz Plot Distribution with the WASA Detector at COSY
COSY Collaboration
In the first production run of the WASA experiment at COSY, the eta decay into three neutral pions was measured in proton-proton interactions at a proton beam kinetic energy of 1.4…
Polarisation of the omega meson in the pd-->3He+omega reaction at 1360 and 1450 MeV
K. Schonning, Chr. Bargholtz, M. Bashkanov +46
The tensor polarisation of omega mesons produced in the pd-->3He+omega reaction has been studied at two energies near threshold. The 3He nuclei were detected in coincidence with th…
Double-Pionic Fusion of Nuclear Systems and the ABCEffect -- Aproaching a Puzzle by Exclusive and Kinematically Complete Measurements
M. Bashkanov, C. Bargholtz, M. Berlowski +46
The ABC effect - a puzzling low-mass enhancement in the invariant mass spectrum - is well-known from inclusive measurements of two-pion production in nuclear fusion reactions.…
The WASA Detector Facility at CELSIUS
Chr. Bargholtz, M. Bashkanov, M. Berłowski +81
The WASA 4pi multidetector system, aimed at investigating light meson production in light ion collisions and eta meson rare decays at the CELSIUS storage ring in Uppsala is present…
Single- and Double-Pion Production in Nucleon Collisions on the Nucleon and on Nuclei -- the ABC Effect and its Possible Origin in a Dibaryonic Resonance
H. Clement, M. Bashkanov, E. Doroshkevich +5
The ABC effect -- an intriguing low-mass enhancement in the invariant mass spectrum -- is known from inclusive measurements of two-pion production in nuclear fusion reactions.…
Measurement of the Slope Parameter for the eta->3pi0 Decay in the pp->pp eta Reaction
M. Bashkanov, D. Bogoslawsky, H. Calén +41
The CELSIUS/WASA setup is used to measure the 3pi0 decay of eta mesons produced in pp interactions with beam kinetic energies of 1.36 and 1.45 GeV. The efficiency-corrected Dalitz…
Two-Pion Production in Nucleon-Nucleon Collisions and the ABC-Effect - Approaching a Puzzleby exclusive and Kinematically complete Measurements
T. Skorodko, M. Bashkanov, C. Bargholtz +50
The ABC effect - a puzzling low-mass enhancement in the invariant mass spectrum - is known from inclusive measurements of two-pion production in nuclear collisions, where it a…
Evidence for a 'Narrow' Roper Resonance - the Breathing Mode of the Nucleon
H. Clement, T. Skorodko, M. Bashkanov +43
All the time since its discovery the N(1440) baryon state, commonly known as Roper resonance, has been a state with many question marks - despite of its 4-star ranking in the p…
Anisotropy in the pion angular distribution of the reaction pp -> pp pi0 at 400 MeV
P. Thorngren Engblom, S. Negasi Keleta, F. Cappellaro +23
The reaction pp -> pp pi0 was studied with the WASA detector at the CELSIUS storage ring. The center of mass angular distribution of the pi0 was obtained by detection of the gamma…
The pp -> pp pi pi pi reaction channels in the threshold region
WASA Collaboration, C. Pauly, M. Jacewicz +42
The cross section for prompt neutral and charged three pion production in pp interactions was measured at excess energies in the range 160 - 217 MeV. That comprises the first measu…
Exclusive Measurements of : the Effect Revisited
M. Bashkanov, D. Bogoslawsky, H. Calén +40
Exclusive measurements of the reactions and have been carried out at GeV at the CELSIUS storage ring using the WASA detecto…
Proposal for the Wide Angle Shower Apparatus (WASA) at COSY-Juelich - "WASA at COSY"
COSY Collaboration, B. Hoistad, J. Ritman
This document describes the physics case, the key experiments proposed and the technical solution for the project "WASA at COSY", which concerns the transfer of the WASA pellet-tar…
Study of the p p -> p p pi+ pi- Reaction in the Low-Energy Tail of the Roper Resonance
J. Paetzold, M. Bashkanov, R. Bilger +27
Exclusive measurements of the p p -> p p pi+ pi- reaction have been carried out at Tp = 775 MeV at CELSIUS using the PROMICE/WASA setup. Together with data obtained at lower energy…
Search for Narrow NNpi Resonances in Exclusive p p -> p p pi+ pi- Measurements
W. Brodowski, J. Paetzold, R. Bilger +26
Narrow structures in the range of a few MeV have been searched for in p p pi+ and p p pi- invariant mass spectra obtained from exclusive measurements of the p p -> p p pi+ pi- reac…
Higher Partial Waves in p+p->p+p+eta near Threshold
H. Calen, J. Dyring, G. Faldt +35
Exclusive measurements of the production of eta mesons in the p+p->p+p+eta reaction have been carried out at excess energies of 16 and 37 MeV above threshold. The deviations from p…
Observation of strong final-state effects in pi+ production in pp collisions at 400 MeV
A. Betsch, R. Bilger, W. Brodowski +29
Differential cross sections of the reactions and have been measured at MeV by detecting the charged ejectiles in the angular range $4^0 \le…