Determination of the<i>NN</i>π coupling constants in<i>NN</i>partial-wave analyses

Klomp, R. A. M.; Stoks, V. G. J.; Swart, J. J. de

doi:10.1103/physrevc.44.r1258

Cited by 59 publications

(68 citation statements)

References 24 publications

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“…However, in our partial-wave analysis of the pp scattering data [22], we found for the ppπ 0 coupling constant f 2 p = 0.0749(7). This value was later confirmed in a combined partial-wave analysis of all pp and np scattering data, assuming charge independence for the pion-nucleon coupling constants [9,11]. There the value f 2 π = 0.075 is recommended for the pion-nucleon coupling constant at the pion pole.…”

Section: B Nijmegen Potentialmentioning

confidence: 68%

“…Because our analysis of the np data (and hence our careful scrutiny of the np data) has only recently been finished [1], we originally constructed an update (Nijm92pp) of the Nijm78 potential for the pp data only. This pp potential was used in our earlier preliminary np analyses [9,10,11] to parametrize the isovector partial waves. It has χ 2 /N pp = 1.4, which is not as good as the Nijmegen PWA93.…”

Section: Introductionmentioning

confidence: 99%

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Construction of high-qualityNNpotential models

et al. 1994

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We present an updated version (Nijm93) of the Nijmegen soft-core potential, which gives a much better description of the np data than the older version (Nijm78). The χ 2 per datum is 1.87. The configuration-space and momentum-space versions of this potential are exactly equivalent; a unique feature among meson-theoretical potentials. We also present three new NN potential models: a non-local Reid-like Nijmegen potential (Nijm I), a local version (Nijm II), and an updated regularized version (Reid93) of the Reid soft-core potential. These three potentials all have a nearly optimal χ 2 per datum and can therefore be considered as alternative partial-wave analyses. All potentials contain the proper charge-dependent one-pion-exchange tail.

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Section: B Nijmegen Potentialmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Construction of high-qualityNNpotential models

et al. 1994

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“…[19,20] and references therein), we do not yet envisage, at least not in the near future, the realization of conditions that would allow one to establish, on QCD grounds, the correctness of the about 8000 currently available published pp and np scattering data below pion production threshold. Instead, already in the early 90's the phenomenological analysis carried out by the Nijmegen group made it possible to pin down the pion masses with a precision of 1 MeV from their PWA of pp and np data [21].…”

Section: Introductionmentioning

confidence: 99%

Minimally nonlocal nucleon-nucleon potentials with chiral two-pion exchange includingΔresonances

et al. 2015

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We construct a coordinate-space chiral potential, including ∆-isobar intermediate states in its two-pion-exchange component up to order Q 3 (Q denotes generically the low momentum scale). The contact interactions entering at next-to-leading and next-to-next-to-next-to-leading orders (Q 2 and Q 4 , respectively) are rearranged by Fierz transformations to yield terms at most quadratic in the relative momentum operator of the two nucleons. The low-energy constants multiplying these contact interactions are fitted to the 2013 Granada database, consisting of 2309 pp and 2982 np data (including, respectively, 148 and 218 normalizations) in the laboratory-energy range 0-300 MeV. For the total 5291 pp and np data in this range, we obtain a χ 2 /datum of roughly 1.3 for a set of three models characterized by long-and short-range cutoffs, RL and RS respectively, ranging from (RL, RS) = (1.2, 0.8) fm down to (0.8, 0.6) fm. The long-range (short-range) cutoff regularizes the one-and two-pion exchange (contact) part of the potential.

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“…The importance of OPEP has been highlighted by the Nijmegen group [5], whose phase-shift analysis of nucleon-nucleon scattering data included an explicit OPEP tail for separations r ≥ 1.4 fm and a phenomenological treatment of the shorterrange interaction. Their study concluded that the NN data require the exchanges of a charged pion with mass m π + c 2 = 139.4(10) MeV, and a neutral pion with mass m π 0 c 2 = 135.6(13) MeV.…”

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confidence: 99%

“…An urgent need of the field is an assessment of what (if any) longrange TPEP components are required by the NN data, rather than merely reflecting theoretical prejudice. Several recent developments suggest that such a study may be tractable [5].…”

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confidence: 99%