Pion-Nucleon and Kaon-Nucleon Scattering Lengths in QCD Sum Rules

Simple item page
dc.creatorKondo, Y.
dc.creatorMorimatsu, O.
dc.creatorNishino, Y.
dc.date1994-09-13
dc.date.accessioned2026-07-07T11:15:14Z
dc.date.available2026-07-07T11:15:14Z
dc.descriptionThe pion-nucleon and kaon-nucleon scattering lengths are studied in the QCD sum rule. We show that the leading and next-to-leading order terms of the OPE give rise to the Tomozawa-Weinberg and sigma terms, respectively. We also show that in the kaon-nucleon system the $Λ(1405)$ contribution has to be subtracted from the OPE side in order to obtain the scattering length. The odd components of the $T$-matrices are in agreement with the experimental values not only in the pion-nucleon channel but also in the kaon-nucleon channel after the $Λ(1405)$ contribution subtracted. The even components disagree with the experimental values in the pion-nucleon channel, which is similar to the situation in the PCAC-plus-current-algebra approach at the Weinberg point. We speculate that this discrepancy should be explained by the continuum contribution in the spectral function above the pion-nucleon threshold.
dc.description14 pages, INS-Rep.-1059, RCNP Preprint 073
dc.identifierhttps://arxiv.org/abs/nucl-th/9409012
dc.identifierhttp://arxiv.org/abs/nucl-th/9409012
dc.identifierPhys.Rev.C53:1927-1935,1996
dc.identifierdoi:10.1103/PhysRevC.53.1927
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192325
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titlePion-Nucleon and Kaon-Nucleon Scattering Lengths in QCD Sum Rules
dc.typetext

Files

Collections

arXiv