Vector and tensor analysing powers in deuteron–proton breakup reactions at intermediate energies

Chiladze, D.; Carbonell, J.; Dymov, S.; Glagolev, V. V.; Hartmann, Michael; Hejny, V.; Kacharava, A.; Keshelashvili, I.; Khoukaz, A.; Koch, H.; Komarov, V.I.; Kulessa, P.; Куликов, А. И.; Macharashvili, G.; Maeda, Yoshikazu; Mersmann, T.; Merzliakov, S.; Mikirtytchiants, S.; Mussgiller, A.; Nioradze, M.; Ohm, H.; Rathmann, F.; Schleichert, R.; Stein, H. J.; Ströher, H.; Uzikov, Yu. N.; Yaschenko, S.; Wilkin, C.

doi:10.1016/j.physletb.2006.04.031

Cited by 19 publications

(15 citation statements)

References 21 publications

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“…The equipment used was described in our earlier publications [10,14,15]. However, for the study of the spincorrelation parameters in 2009 [20], a newly developed polarised internal target [12,13] was installed at ANKE and this was employed in experiments at 1.2 and 2.27 GeV.…”

Section: The Experimental Facilitymentioning

confidence: 99%

“…(5.1), the theoretical predictions for A xx and A yy being taken at mean values of q in each bin. The validity of this approach was checked at T d = 1.17 GeV in the earlier experimental studies at ANKE [14]. The beam polarisation in each state was taken as the weighted average over the different values of the momentum transfer.…”

Section: Tensor Polarisation Of the Deuteron Beammentioning

confidence: 99%

“…We have described the phenomenology of the deuteron charge-exchange reaction at some length in earlier publications [10,14,15] but, in order to make the current paper more self-contained, some of this material is repeated in sect. 2.…”

Section: Introductionmentioning

confidence: 99%

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The neutron-proton charge-exchange amplitudes measured in the dp → ppn reaction

et al. 2013

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Abstract. The unpolarised differential cross section and the two deuteron tensor analysing powers Axx and Ayy of the dp → {pp}sn charge-exchange reaction have been measured with the ANKE spectrometer at the COSY storage ring. Using deuteron beams with energies 1.2, 1.6, 1.8, and 2.27 GeV, data were obtained for small momentum transfers to a {pp}s system with low excitation energy. The results at the three lower energies are consistent with impulse approximation predictions based upon the current knowledge of the neutron-proton amplitudes. However, at 2.27 GeV, where these amplitudes are far more uncertain, agreement requires a reduction in the overall double-spin-flip contribution, with an especially significant effect in the longitudinal direction. These conclusions are supported by measurements of the deuteronproton spin-correlation parameters Cx,x and Cy,y that were carried out in the d p → {pp}sn reaction at 1.2 and 2.27 GeV. The values obtained for the proton analysing power A p y also suggest the need for a radical reevaluation of the neutron-proton elastic scattering amplitudes at the higher energy. It is therefore clear that such measurements can provide a valuable addition to the neutron-proton database in the charge-exchange region. PACS

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Section: The Experimental Facilitymentioning

confidence: 99%

Section: Tensor Polarisation Of the Deuteron Beammentioning

confidence: 99%

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The neutron-proton charge-exchange amplitudes measured in the dp → ppn reaction

et al. 2013

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“…The diproton programme at ANKE involves several experiments: study of mesonless deuteron break-up pd → {pp} s n [2][3][4][5], study of one and two pion production in pN collisions [6,7], and of inverse diproton photodisintegration pp → {pp} s γ [8]. Investigation of single pion production and the charge-exchange reaction are the key double polarization experiments in the future physics programme at ANKE.…”

Section: Reactions With Diproton Final State At Ankementioning

confidence: 99%

Studies of Di-proton production at ANKE

Dymov¹,

Khemchandani²,

Nagahiro³

et al. 2011

AIP Conference Proceedings

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“…This has already been proved [2] at ANKE. During the first phase of the np programme at ANKE [3], polarized deuteron beams incident on hydrogen targets were used, yielding important results [4,5]. However, at COSY the maximum momentum of the beam is 3.7 GeV/c, thus the maximum energy per nucleon in the case of deuteron beam is 1.15 GeV.…”

Section: Introductionmentioning

confidence: 99%

Polarimetry for the polarized deuterium target at ANKE/COSY

Gou¹

2014

Proceedings of XVth International Workshop on Polarized Sources, Targets, and Polarimetry — PoS(PSTP2013)

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The understanding of the NN interaction is fundamental to the whole of nuclear and hadronic physics. The scattering amplitudes for the complete description of NN interactions can be reconstructed from phase-shift analyses (PSA), which require measurements with polarized beam and polarized target. Very little is known about the np system above 800 MeV nucleon energy. The ANKE collaboration at COSY-Jülich has proposed to extract np scattering amplitudes using deuterons as a source of quasi-free neutrons. The first part of the program with a polarized deuteron beam and a hydrogen target allowed successful determination of np amplitudes up to 1.15 GeV nucleon energy. Use of a polarized deuterium target and a proton beam will allow to increase np studies up to 2.8 GeV, the highest energy available at COSY. In order to compensate the low density of the atomic beam source (ABS), polarized deuterium gas will be injected into a storage cell, placed along the COSY beam direction. Commissioning of the polarized deuterium target at ANKE was carried out in June 2012. Nuclear reactions with large and well-known cross sections and analyzing powers were selected to measure the target vector and tensor polarizations (Q y and Q yy ).

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Vector and tensor analysing powers in deuteron–proton breakup reactions at intermediate energies

Cited by 19 publications

References 21 publications

The neutron-proton charge-exchange amplitudes measured in the dp → ppn reaction

The neutron-proton charge-exchange amplitudes measured in the dp → ppn reaction

Studies of Di-proton production at ANKE

Polarimetry for the polarized deuterium target at ANKE/COSY

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