$Λ$$Λ$ interactions in finite-density QCD sum rules
| dc.creator | Zhong, X. H. | |
| dc.creator | Ning, P. Z. | |
| dc.date | 2006-09-11 | |
| dc.date | 2007-05-30 | |
| dc.date.accessioned | 2026-07-07T11:07:37Z | |
| dc.date.available | 2026-07-07T11:07:37Z | |
| dc.description | The properties of $Λ$-hyperons in pure $Λ$ matter are studied with the finite-density QCD sum rule approach. The first order quark and gluon condensates in $Λ$ nuclear matter are deduced from the chiral perturbation theory. The sum rule predictions are sensitive to the four-quark condensates, $<\bar{q}q>^2_ρ$ and $<\bar{q}q>_ρ<\bar{s}s>_ρ$, and the $πN$ sigma term. When $<\bar{q}q>^2_ρ$ is nearly independent of density and $<\bar{q}q>_ρ<\bar{s}s>_ρ$ depends strongly on density, we can obtain weakly attractive $Λ$$Λ$ potentials (about several MeV) in low $Λ$ density region, which agree with the information from the latest double $Λ$ hyper-nucleus experiments. The nearly no density dependence of $<\bar{q}q>^2_ρ$ and strong density dependence of $<\bar{q}q>_ρ<\bar{s}s>_ρ$ can be explained naturally if the properties of $<\bar{q}q>^2_ρ$ and $<\bar{q}q>_ρ<\bar{s}s>_ρ$ are assumed to be similar to those of $ππ$ and $\bar{K} K$ in nuclear medium, respectively. | |
| dc.description | 10 pages and 7 figures | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0609022 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0609022 | |
| dc.identifier | Phys.Rev.C75:055206,2007 | |
| dc.identifier | doi:10.1103/PhysRevC.75.055206 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/189903 | |
| dc.subject | Nuclear Theory | |
| dc.title | $Λ$$Λ$ interactions in finite-density QCD sum rules | |
| dc.type | text |