Antiproton-proton elastic scattering between 63 and 175 MeV

Conforto, B.; Fidecaro, G.; Steiner, H.; Bizzarri, R.; Guidoni, P.; Marcelja, F.; Brautti, G.; Castelli, E.; Ceschia, M.; Sessa, M.

doi:10.1007/bf02743794

Cited by 41 publications

(5 citation statements)

References 12 publications

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“…ing into account the two first values and the two last ones which are obviously spurious. In general, the data of Kunne Pre-LEAR [2 -5,25 -29] LEAR at forward angles [18,19] LEAR at non forward angles [20 -23] KEK [24] [2] and Sakamoto et al [27]. If these points are removed, the y2/data drops to 22 [6] which were, in 1982, among the most constraining and useful data, due to their high precision, are still well reproduced (Fig.…”

Section: Resultsmentioning

confidence: 99%

ParisNN¯potential and recent proton-antiproton low energy data

et al. 1994

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The inner part of the Paris nucleon-antinucleon optical potential has been reanalyzed in view of new experimental constraints. These are mainly provided by accurate measurements of the analyzing power in charge-exchange scattering, pp~n n, together with elastic pp -+ pp polarization data, allowing a better determination of the isospin dependence of the short-range forces. The 6t is performed with a set of 3632 data. The good quality of the St is illustrated over a large sample of observables for laboratory momenta from 180 to 910 MeV/c. Curves of the potentials and of the phase shifts are shown as well as the parameters of the potentials and effective range formula coefBcients for the S and P waves. The spectrum of resonances and bound states predicted by our potential is also displayed. In particular, a bound state having the AX(1565) quantum numbers is found with the right mass.PACS number(s): 13.75.Cs, 21.30. +y

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Section: Resultsmentioning

confidence: 99%

ParisNN¯potential and recent proton-antiproton low energy data

et al. 1994

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“…Data are taken from Refs. [75,67,76,73,77,78,79,80] (differential cross sections), [81,82,83] (analyzing powers), and [84] (D nn ). Note that contributions from J ≥ 5 become relevant for momenta above 400 MeV/c, but primarily at backward angles.…”

Section: Observablesmentioning

confidence: 99%

“…For notations, see Fig.9.The red/dash-double dotted line represents the result of the PWA[32]. Data are taken from Refs [75,67,76,73,77,78,79,80]. (differential cross sections),[81,82,83] (analyzing powers), and[84] (D nn ).…”

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confidence: 99%

Antinucleon-nucleon interaction at next-to-next-to-next-to-leading order in chiral effective field theory

Dai¹,

Haidenbauer²,

Meißner³

2017

J. High Energ. Phys.

130

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Abstract:Results for the antinucleon-nucleon (N N ) interaction obtained at next-to-nextto-next-to-leading order in chiral effective field theory (EFT) are reported. A new local regularization scheme is used for the pion-exchange contributions that has been recently suggested and applied in a pertinent study of the N N force within chiral EFT. Furthermore, an alternative strategy for estimating the uncertainty is utilized that no longer depends on a variation of the cutoffs. The low-energy constants associated with the arising contact terms are fixed by a fit to the phase shifts and inelasticities provided by a phase-shift analysis ofpp scattering data. An excellent description of theN N amplitudes is achieved at the highest order considered. Moreover, because of the quantitative reproduction of partial waves up to J = 3, there is also a nice agreement on the level ofpp observables. Specifically, total and integrated elastic and charge-exchange cross sections agree well with the results from the partial-wave analysis up to laboratory energies of 300 MeV, while differential cross sections and analyzing powers are described quantitatively up to 200-250 MeV. The low-energy structure of theN N amplitudes is also considered and compared to data from antiprotonic hydrogen.

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“…We do not include integrated elastic-cross-section data [110,104,145,113,115], due to difficulties in a proper treatment of Coulomb and Coulomb-nuclear interference. Integrated charge-exchange cross sections, on the other hand, are included in the database.…”

Section: The Nijmegen 1993 Antiproton-proton Database a Set-up Of The...mentioning

confidence: 99%

“…In the pre-LEAR era a very large part of the experimental data on pp scattering consisted of elastic differential cross sections [110,104,129,132,128,113]. The most accurate data were those taken by Eisenhandler et al at 690, 790, and 860 MeV/c (and higher momenta) [128].…”

Section: The Nijmegen 1993 Antiproton-proton Database a Set-up Of The...mentioning

confidence: 99%

Antiproton-proton partial-wave analysis below 925 MeV/c

1994

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A partial-wave analysis of all antiproton-proton scattering data below 925 MeV/c antiproton laboratory momentum is presented. The method used is adapted from the Nijmegen phase-shift analyses of pp and np scattering data. The Nijmegen 1993 antiproton-proton database, consisting of 3646 antiproton-proton scattering data, is presented and discussed. The best fit to this database results in chi^2_min/Ndata = 1.043. The pseudovector coupling constant of the charged pion to nucleons is determined to be (f_c)^2 = 0.0732(11) at the pion pole, where the error is statistical.Comment: Report THEF-NYM 93.02 42 pages REVTeX, 7 separate postscript figures appended. Accepted for publication in Phys. Rev.

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Antiproton-proton elastic scattering between 63 and 175 MeV

Cited by 41 publications

References 12 publications

ParisNN¯potential and recent proton-antiproton low energy data

ParisNN¯potential and recent proton-antiproton low energy data

Antinucleon-nucleon interaction at next-to-next-to-next-to-leading order in chiral effective field theory

Antiproton-proton partial-wave analysis below 925 MeV/c

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