Theory and Data Analysis for the High Momentum End of $^4$He spectrum

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dc.creatorPistolesi, F.
dc.date1998-12-15
dc.date.accessioned2026-07-07T03:12:23Z
dc.date.available2026-07-07T03:12:23Z
dc.descriptionThe hybridization of the single-excitation branch with the two-excitation continuum is reconsidered from the theoretical point of view by including the effect of the interference term between one and two excitations. The phenomenological theory presented is used to reproduce the experimental data over a wide region of momentum (2.3-3.6 A^{-1}) and energy (0-12 meV). It is thus possible to extract the final part of $^4$He spectrum with higher accuracy. It is found that data agree with a dispersion relation always below twice the roton energy. This is consistent with the negative value of the roton-roton interaction found.
dc.descriptionLatex with jltp class. 1 figure, paper presented at QFS98
dc.identifierhttps://arxiv.org/abs/cond-mat/9812241
dc.identifierhttp://arxiv.org/abs/cond-mat/9812241
dc.identifierJ. Low Temp. Phys Vol 113, p. 597 (1998)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/28888
dc.subjectCondensed Matter
dc.titleTheory and Data Analysis for the High Momentum End of $^4$He spectrum
dc.typetext

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