The two-nucleon interaction

Phillips, R. J.

doi:10.1088/0034-4885/22/1/314

Cited by 46 publications

(27 citation statements)

References 374 publications

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“…It goes beyond the scope of this paper to discuss the whole variety of the different techniques which have been developed to construct an effective interactions, see ref. [15] for a comprehensive review. We will now briefly introduce two methods which will be important for our further considerations.…”

Section: Construction Of the Nn Potential From Field Theorymentioning

confidence: 99%

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Nuclear forces in the chiral limit

2003

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We investigate the behaviour of the nuclear forces as a function of the light quark masses (or, equivalently, pion mass) in the framework of chiral effective field theory at next-to-leading order. The nucleon-nucleon force is described in terms of one and two-pion exchange and local short distance operators, which depend explicitly and implicitly on the quark masses. The pion propagator becomes Coulomb-like in the chiral limit and thus one has significant scattering in all partial waves. The pion-nucleon coupling depends implicitly on the quark masses and we find that it becomes stronger in the chiral limit. There is a further quark mass dependence in the S-wave fournucleon couplings, which can be estimated by means of dimensional analysis. We find that nuclear physics in the chiral limit becomes natural. There are no new bound states, the deuteron binding energy is B We also discuss the extrapolation to larger pion masses pertinent for the extraction of these quantities from lattice simulations.

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Section: Construction Of the Nn Potential From Field Theorymentioning

confidence: 99%

“…This has been achieved in an elegant way by Fukuda et al [20] and Okubo [21]. They introduced an operator A ≡ λAη which maps the states φ into the states ψ: 15) so that the state Ψ is given by…”

Section: Construction Of the Nn Potential From Field Theorymentioning

confidence: 99%

Nuclear forces in the chiral limit

2003

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“…Evidence for the influence of the polar head group on the packing of hydrocarbon chains has been discussed in the literature (13) and, recently, detailed calorimetric studies were published demonstrating the influence of the nature and changes of the polar head group on the crystalline to liquidxrystalline phase transition of lipids (24,25). However, the transition described here is not identical with the crystalline to liquidxrystalline phase transition, but is associated with a new characteristic temperature ( Table 2).…”

Section: Discussionmentioning

confidence: 72%

“…In particular, detailed studies regarding the organization of acyl chains of various lecithins have been published (for review see Ref. 13). In all these studies, the major change obtained when the experimentally measured parameter was plotted against temperature was attributed to the transition from crystalline to liquidxrystalline state of acyl chains ('main transition', upper transition in Table 2); in addition, in several studies another change at a lower temperature was also reported ('pretransition', lower transition in Table 2), commonly attributed to the changes of lecithin head group (however, see also Ref.…”

Section: Tempc~rtrtirre-ind11c*eci Changes In Let-ithin Modelmentioning

confidence: 99%

Temperature-induced changes in lecithin model membranes detected by novel covalent spin-labelled phospholipids

Stuhne-Sekalec¹,

Stanaćev²

1977

Can. J. Biochem.

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Several spin-labelled phospholipids carrying covalently bound 5-doxylstearic acid (2-(3-carboxydecyl)-2-hexyl-4,4-dimethyl-3-oxazolidinoxyl) were intercalated in liposomes of saturated and unsaturated lecithins. Temperature-induced changes of these liposomes, detected by the spin-labelled phospholipids, were found to be in agreement with the previously described transitions of hydrocarbon chains of host lecithins detected by different probes and different techniques, establishing that spin-labelled phosopholipids are sensitive probes for the detection of temperature-induced changes in lecithin model membranes. In addition to the detection of already-known transitions in lecithin liposomes, the coexistence of two distinctly different enviroments was observed above the characteristic transition temperature. This phenomenon was tentatively attributed to the influence of the lecithin polar group on the fluidity of fatty acyl chains near the polar group. Combined with other results from the literature, the coexistence of two environments could be associated with the coexistence of two conformational isomers of lecithin, differing in the orientation of the polar head group with respect to the plane of bilayer. These findings have been discussed in view of the present state of knowledge regarding temperature-induced changes in model membranes.

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“…It goes beyond the scope of this work to address the whole variety of different techniques which have been developed to construct effective interactions, see Ref. [126] for a comprehensive review. We will now briefly outline a few methods which have been used in the context of chiral EFT.…”

Section: Nuclear Potentials From Field Theorymentioning

confidence: 99%