ANKE, a new facility for medium energy hadron physics at COSY-Jülich

Barsov, S.; Bechstedt, U.; Bothe, W.; Bongers, N.; Borchert, G.; Borgs, W.; Bräutigam, W.; Büscher, M.; Cassing, W.; Chernyshev, V.P.; Chiladze, B.G.; Dietrich, J.; Drochner, M.; Dymov, S.; Erven, W.; Esser, Rüdiger; Franzen, Arne; Golubeva, Ye. S.; Gotta, D.; Grande, T; Grzonka, D.; Hardt, A.; Hartmann, Michael; Hejny, V.; Horn, L.v; Jarczyk, L.; Junghans, H.; Kacharava, A.; Kamys, B.; Khoukaz, A.; Kirchner, T.; Klehr, F.; Klein, W.; Koch, H.; Komarov, V.I.; Kondratyuk, L.A.; Koptev, V.; Kopyto, S.; Krause, R.; Кравцов, П.; Kruglov, V. N.; Kulessa, P.; Kulikov, A.; Lang, N.; Langenhagen, N; Lepges, A; Ley, J.; Maier, R.; Martin, S.; Macharashvili, G.; Merzliakov, S.; Meyer, K.P.; Mikirtychiants, S.; Müller, H.; Munhofen, P; Mussgiller, A.; Nekipelov, M.; Nelyubin, V.; Nioradze, M.; Ohm, H.; Petrus, A.; Prasuhn, D.; Prietzschk, B.; Probst, H.J.; Pysz, K.; Rathmann, F.; Rimarzig, B.; Rudy, Z.; Santo, R.; Schieck, H. Paetz gen.; Schleichert, R.; Schneider, A.; Schneider, Chr.; Schneider, H.; Schwarz, U; Seyfarth, H.; Sibirtsev, A.; Sieling, Ulrich; Sistemich, K.; Selikov, A.V.; Stechemesser, H.; Stein, H. J.; Strzalkowski, A.; Watzlawik, K.-H.; Wüstner, P.; Yashenko, S; Zalikhanov, B.; Zhuravlev, N.; Zwoll, K.; Zychor, I.; Schult, O.W.B.; Ströher, H.

doi:10.1016/s0168-9002(00)01147-5

Cited by 167 publications

(100 citation statements)

References 19 publications

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“…The circulating FIGURE 1. Top view of the ANKE spectrometer and detectors [18,19]. The spectrometer contains three dipole magnets D1, D2, and D3, which guide the circulating COSY beam through a chicane.…”

mentioning

confidence: 99%

See 1 more Smart Citation

φ-meson production and the in-medium φ-width in proton-nucleus collisions

Hartmann¹,

Kiselev²,

Paryev³

et al. 2010

AIP Conference Proceedings

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mentioning

confidence: 99%

“…The ANKE spectrometer [18,19] has detection systems placed to the right and left of the beam to register positively and negatively charged ejectiles, i.e., K + and K − in the case of inclusive φ -meson production. Although not used in the present analysis, forward-going particles such as protons can also be detected in coincidence.…”

mentioning

confidence: 99%

φ-meson production and the in-medium φ-width in proton-nucleus collisions

Hartmann¹,

Kiselev²,

Paryev³

et al. 2010

AIP Conference Proceedings

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“…However, the double polarisation observables have been explored far less and information on the spin correlations is still very scarce. The ANKE spectrometer [3] equipped with an internal polarised target together with the polarised deuteron beam of COSY synchrotron (Jülich, Germany) offer a unique opportunity to conduct measurements of the transverse spin correlation coefficients in these reactions. Two double-polarisation experiments have been performed at ANKE with a polarised deuteron beam and a polarised hydrogen target, at the beam energies of 363 and 600 & 1115 MeV per nucleon.…”

Section: Spin Correlation Coefficientsmentioning

confidence: 99%

Study of coherent pion production in proton-deuteron collisions with polarized beams and target at ANKE-COSY

Dymov

Shmakova

2016

EPJ Web Conf.

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Abstract. Values of the proton analysing power, deuteron vector analysing power, and the deuteron-proton spin correlations in the pd → 3 He π 0 / 3 H π + reactions at 350-360 MeV per nucleon were obtained by using polarized beams and target at ANKE-COSY. Data were also obtained on the deuteron-proton spin correlation and proton analysing power at small angles at 600 MeV per nucleon. By combining the extrapolated values of the spin correlations to the forward or backward directions with published measurements of the deuteron tensor analysing powers, the relative phases between the two non-vanishing amplitudes were evaluated.

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“…1 and 2. For a spin-singlet diproton, the spin structure of the pp → {pp} s π 0 or np → {pp} s π − reaction is that of 1 …”

Section: The Pp → { Pp} S π 0 Processmentioning

confidence: 99%

Near-threshold pion production in diproton reactions with polarised beams and target at ANKE-COSY

Dymov

2012

EPJ Web of Conferences

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Abstract. An extensive experimental study of near-threshold pion production in diproton reactions is underway at the ANKE-COSY spectrometer (Jülich). The programme is aimed at isolating the four-nucleon-pion contact interaction term appearing in the χPT expansions of these processes. This will establish links between pion production and other low energy phenomena within the χPT approach. The first step in the programme was to measure the differential cross-section and the proton analysing power in the pp → {pp} s π 0 and pn → {pp} s π − reactions over the full angular range. Here {pp} s denotes a diproton, i.e.,a two-proton system in a 1 S 0 state. These data allow a partial wave analysis to be carried out provided that simplifying assumptions are made when applying the Watson theorem. To make the analysis more robust, and independent of the uncertainties in the relative normalization, the spin-correlation coefficients A x,x and A y,y in the n p → {pp} s π − reaction were measured in a follow-up experiment. The first results of the data analysis are presented and future developments of the programme are outlined. The physics case for near-threshold single pion productionThe ANKE [1] experimental programme on the near-threshold pion production aims to measure the cross sections and spin observables in the pp → {pp} s π 0 and np → {pp} s π − reactions [2,3]. The symbol {pp} s here denotes a diproton, that is, an unbound proton pair with a very low excitation energy, E pp < 3 MeV. The selection of a low excitation energy ensures the dominance of the 1 S 0 state of the diproton, which simplifies significantly the theoretical analysis. A full data set of all observables at low beam energies would allow us to determine the partial wave amplitudes which, in turn, would provide a non-trivial test of chiral perturbation theory [4] and also lead to the determination of the value of the parameter d, which represents the important contact term that affects the pion p-wave amplitudes.The short range physics in chiral effective field theories, which provide a model-independent understanding of Nature, is encoded in the so-called low energy constants (LEC). These LECs, once determined from one process, can be applied to predict many others. For example, the LECs c1-c4 extracted from πN analysis on the basis of chiral perturbation theory are now widely used to parameterise the short range physics in the NN-interaction, few-nucleon systems, single (and multi-) pion production in NN collisions etc. Analogously, by studying the p-wave pion production amplitudes we get access to the 4Nπ contact operator, the strength of which is controlled by the low energy constant d. This LEC enters also in electroweak processes, such as pp → de + ν and triton β decay, in few-body operators (e.g. in pd → pd), pion photoproduction γd → nnπ + and its inverse πd → γNN. It therefore plays a very important role in connecting different low-energy reactions.On the practical side, the pp → {pp} s π 0 and np → {pp} s π − reactions have the big advantage f...

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ANKE, a new facility for medium energy hadron physics at COSY-Jülich

Cited by 167 publications

References 19 publications

φ-meson production and the in-medium φ-width in proton-nucleus collisions

φ-meson production and the in-medium φ-width in proton-nucleus collisions

Study of coherent pion production in proton-deuteron collisions with polarized beams and target at ANKE-COSY

Near-threshold pion production in diproton reactions with polarised beams and target at ANKE-COSY

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