Publications (40)
The production of K+K- pairs in proton-proton collisions at 2.83 GeV
Q. J. Ye, M. Hartmann, Y. Maeda +30
Differential and total cross sections for the pp -> ppK+K- reaction have been measured at a proton beam energy of 2.83 GeV using the COSY-ANKE magnetic spectrometer. Detailed model…
Observation of an ABC effect in proton-proton collisions
S. Dymov, M. Hartmann, A. Kacharava +20
The cross section for inclusive multipion production in the pp->ppX reaction was measured at COSY-ANKE at four beam energies, 0.8, 1.1, 1.4, and 2.0 GeV, for low excitation energy…
Observation of inverse diproton photodisintegration at intermediate energies
V. Komarov, T. Azaryan, D. Chiladze +18
The reaction pp->{pp}_sγ, where {pp}_s is a proton pair with an excitation energy E_{pp}<3 MeV, has been observed with the ANKE spectrometer at COSY-Juelich for proton beam energi…
Differential cross section and analysing power of the pp -> {pp\}_s pi0 reaction at 353 MeV
D. Tsirkov, T. Azaryan, V. Baru +30
In order to establish links between p-wave pion production in nucleon-nucleon collisions and low energy three-nucleon scattering, an extensive programme of experiments on pion prod…
Analysing powers and spin correlations in deuteron-proton charge exchange at 726 MeV
S. Dymov, T. Azaryan, Z. Bagdasarian +36
The charge exchange of vector polarised deuterons on a polarised hydrogen target has been studied in a high statistics experiment at the COSY-ANKE facility at a deuteron beam energ…
Energy dependence of forward 1S0 diproton production in the pp -> pp pi0 reaction
V. Kurbatov, M. Buescher, S. Dymov +18
The pp -> {pp}_s pi0 differential cross section has been measured with the ANKE spectrometer at COSY-Juelich for seven proton beam energies T_p between 0.5 and 1.97 GeV. By selecti…
The Near-Threshold Production of Phi Mesons in pp Collisions
M. Hartmann, Y. Maeda, I. Keshelashvilli +23
The pp->pp phi reaction has been studied at the Cooler Synchrotron COSY-Juelich, using the internal beam and ANKE facility. Total cross sections have been determined at three exces…
The pp->K+ n Sigma+ reaction near threshold
Yu. Valdau, V. Koptev, S. Barsov +11
Inclusive K+ production in proton-proton collisions has been measured at a beam energy of 2.16 GeV using the COSY-ANKE magnetic spectrometer. The resulting spectrum, as well as tho…
Vector and tensor analysing powers in deuteron-proton breakup reactions at intermediate energies
D. Chiladze, J. Carbonell, S. Dymov +25
Vector and tensor analysing powers of the d(pol)p->(pp)n (charge-exchange) and d(pol)p->(pn)p (non-charge-exchange) breakup reactions have been measured with the ANKE spectrometer…
Polarizing a stored proton beam by spin flip?
D. Oellers, L. Barion, S. Barsov +66
We discuss polarizing a proton beam in a storage ring, either by selective removal or by spin flip of the stored ions. Prompted by recent, conflicting calculations, we have carried…
Coherent pion production in proton-deuteron collisions
S. Dymov, V. Shmakova, D. Mchedlishvili +36
Values of the proton analysing power in the reactions at 350-360~MeV per nucleon were obtained by using a polarised proton beam…
Excitation of the Delta(1232) isobar in deuteron charge exchange on hydrogen at 1.6, 1.8, and 2.3 GeV
D. Mchedlishvili, S. Barsov, J. Carbonell +42
The charge-exchange break-up of polarised deuterons pol{d}p -> {pp}n, where the final {pp} diproton system has a very low excitation energy and hence is mainly in the 1S0 state, is…
Study of omega-meson production in pp collisions at ANKE
S. Barsov, M. Büscher, M. Hartmann +26
The production of omega-mesons in the pp->pp omega reaction has been investigated with the COSY-ANKE spectrometer for excess energies of 60 and 92MeV by detecting the two final pro…
Deuteron analysing powers in deuteron-proton elastic scattering at 1.2 and 2.27 GeV
D. Mchedlishvili, Z. Bagdasarian, S. Barsov +31
The vector and tensor analysing powers in deuteron-proton elastic scattering have been measured in the forward hemisphere at deuteron kinetic energies of 1.2 GeV and 2.27 GeV using…
Kaon pair production in proton-nucleus collisions at 2.83 GeV kinetic energy
Yu. T. Kiselev, M. Hartmann, A. Polyanskiy +23
The production of non-phi K+K- pairs by protons of 2.83 GeV kinetic energy on C, Cu, Ag, and Au targets has been investigated using the COSY-ANKE magnetic spectrometer. The K- mome…
Measurement of the analysing power in proton-proton elastic scattering at small angles
Z. Bagdasarian, D. Chiladze, S. Dymov +36
The proton analysing power in elastic scattering has been measured at small angles at COSY-ANKE at 796 MeV and five other beam energies between 1.6 and 2.4 GeV using a p…
Resonance-like coherent production of a pion pair in the reaction in the GeV region
V. I. Komarov, D. Tsirkov, T. Azaryan +27
The reaction was studied at 0.8-2.0 GeV proton beam energies with the ANKE magnetic spectrometer at the COSY synchrotron storage ring. The proton-deut…
Measurement of the Spin-Dependence of the pbar-p Interaction at the AD-Ring
C. Barschel, U. Bechstedt, J. Dietrich +106
We propose to use an internal polarized hydrogen storage cell gas target in the AD ring to determine for the first time the two total spin-dependent pbar-p cross sections sigma_1 a…
The neutron-proton charge-exchange amplitudes measured in the dp -> ppn reaction
D. Mchedlishvili, S. Barsov, J. Carbonell +41
The unpolarised differential cross section and the two deuteron tensor analysing powers A_{xx} and A_{yy} of the pol{d}p -> (pp)n charge-exchange reaction have been measured with t…
Momentum dependence of the phi-meson nuclear transparency
M. Hartmann, Yu. T. Kiselev, A. Polyanskiy +29
The production of phi mesons in proton collisions with C, Cu, Ag, and Au targets has been studied via the phi -> K+K- decay at an incident beam energy of 2.83 GeV using the ANKE de…
The production of K+K- pairs in proton-proton collisions below the phi meson threshold
Q. J. Ye, M. Hartmann, D. Chiladze +21
The pp -> ppK+K- reaction was measured below the phi threshold at a beam energy of 2.568 GeV using the COSY-ANKE magnetic spectrometer. By assuming that the four-body phase space i…
Measurement of the Analyzing Power in \\with a Fast Forward --Diproton
S. Yaschenko, S. Dymov, V. Komarov +28
A measurement of the analyzing power of the reaction was carried out at beam energies of 0.5 and 0.8 GeV by detection of a fast forward proton pair of…
Measurement of the analyzing powers in pd elastic and pn quasi-elastic scattering at small angles
S. Barsov, Z. Bagdasarian, S. Dymov +30
The analyzing powers in proton-deuteron elastic and proton-neutron quasi-elastic scattering have been measured at small angles using a polarized proton beam at the COSY storage rin…
Study of the charge-exchange reaction using a polarised deuterium target
B. Gou, D. Mchedlishvili, Z. Bagdasarian +38
The vector and tensor analysing powers, and , of the charge-exchange reaction have been measured at a beam energy of 600 MeV at the COSY-AN…
Proton--induced deuteron breakup at GeV energies with forward emission of a fast proton pair
V. Komarov, S. Dymov, A. Kacharava +29
A study of the deuteron breakup reaction with forward emission of a fast proton pair with small excitation energy 3 MeV has been performed at the ANKE spec…
The energy dependence of the pp->K+ n Sigma+ reaction close to threshold
Yu. Valdau, S. Barsov, M. Büscher +20
The production of the Sigma+ hyperon through the pp->K+nSigma+ reaction has been investigated at four energies close to threshold, 1.826, 1.920, 1.958, and 2.020 GeV. At low energi…
Measurement of the absolute differential cross section of proton-proton elastic scattering at small angles
D. Mchedlishvili, D. Chiladze, S. Dymov +38
The differential cross section for proton-proton elastic scattering has been measured at a beam energy of 1.0 GeV and in 200 MeV steps from 1.6 to 2.8 GeV for centre-of-mass angles…
Energy dependence of hard bremsstrahlung production in proton-proton collisions in the Delta(1232) region
D. Tsirkov, V. Komarov, T. Azaryan +19
Hard bremsstrahlung production in proton-proton collisions has been studied with the ANKE spectrometer at COSY-Juelich in the energy range of 353-800 MeV by detecting the final pro…
Near-threshold production of omega mesons in the pn -> d omega reaction
S. Barsov, I. Lehmann, R. Schleichert +21
The first measurement of the p n -> d omega total cross section has been achieved at mean excess energies of Q = 28 and 57 MeV by using a deuterium cluster-jet target. The momentum…
Absence of spin dependence in the final state interaction of the d(pol) p --> 3He eta reaction
M. Papenbrock, S. Barsov, I. Burmeister +27
The deuteron tensor analysing power t_{20} of the d(pol) p --> 3He eta reaction has been measured at the COSY-ANKE facility in small steps in excess energy Q up to Q = 11 MeV. Desp…
Toward polarized antiprotons: Machine development for spin-filtering experiments
C. Weidemann, F. Rathmann, H. J. Stein +54
The paper describes the commissioning of the experimental equipment and the machine studies required for the first spin-filtering experiment with protons at a beam kinetic energy o…
First measurements of spin correlations in the np -> d pi^0 reaction
V. Shmakova, D. Mchedlishvili, S. Dymov +32
The transverse spin correlations Axx and Ayy in the np-> d pi^0 reaction have been measured for the first time in quasi-free kinematics at the COSY-ANKE facility using a polarised…
a0+(980)-resonance production in the reaction pp -> dpi+eta close to the K(bar(K)) threshold
P. Fedorets, M. Buescher, V. P. Chernyshev +20
The reaction pp -> dpi+eta has been measured at a beam energy of T=2.65 GeV (p=3.46 GeV/c) using the ANKE spectrometer at COSY-Juelich. The missing mass distribution of the detecte…
Neutron-proton charge-exchange amplitudes at 585 MeV
D. Chiladze, J. Carbonell, A. Dzyuba +27
The differential cross section and deuteron analysing powers of the dp -> {pp}n charge-exchange reaction have been measured with the ANKE spectrometer at the COSY storage ring. Usi…
Evidence of kaon nuclear and Coulomb potential effects on soft K+ production from nuclei
M. Nekipelov, M. Buescher, W. Cassing +21
The ratio of forward K+ production on copper, silver and gold targets to that on carbon has been measured at proton beam energies between 1.5 and 2.3 GeV as a function of the kaon…
Measurement of the in-medium phi-meson width in proton-nucleus collisions
A. Polyanskiy, M. Hartmann, Yu. T. Kiselev +25
The production of phi mesons in the collisions of 2.83 GeV protons with C, Cu, Ag, and Au at forward angles has been measured via the phi -> K+K- decay using the COSY-ANKE magnetic…
Production of the 1S0 diproton in the pp -> pp pi0 reaction at 0.8 GeV
S. Dymov, D. Gusev, M. Hartmann +20
The pp -> pp pi0 differential cross section has been measured with the ANKE spectrometer at COSY-Juelich for pion cms angles between 0 and 15.4 degrees at a proton beam energy of 0…
Differential cross section and analysing power of the quasi-free pn -> {pp}_s pi- reaction at 353 MeV
S. Dymov, T. Azaryan, S. Barsov +36
In order to establish links between p-wave pion production in nucleon-nucleon collisions and low energy three-nucleon scattering, an extensive programme of experiments on pion prod…
Determination of Deuteron Beam Polarizations at COSY
D. Chiladze, A. Kacharava, F. Rathmann +44
The vector and tensor polarizations of a deuteron beam have been measured using elastic deuteron-carbon scattering at 75.6 MeV and deuteron-proton scattering at 270 MeV. After acce…
Measurement of spin observables in the quasi-free np-> {pp}_s pi- reaction at 353 MeV
S. Dymov, V. Shmakova, T. Azaryan +54
The transverse spin correlations A_{x,x} and A_{y,y} have been measured in the pol{d} pol{p} -> p_spec {pp}_s pi- reaction at COSY-ANKE at 353 MeV per nucleon. Here {pp}_s denotes…