35,258 research outputs found
Exploring a state: with focus on
Stimulated by the new discovery of by LHCb Collaboration,
we endeavor to perform the study of as a
state in the framework of QCD sum rules. Taking into account the results from
two sum rules, a conservative mass range 4.07\sim4.97~\mbox{GeV} is presented
for the hadronic system, which agrees with the experimental
data of and could support its interpretation as a
state.Comment: 9 pages, 6 figures. arXiv admin note: text overlap with
arXiv:1801.0872
Cooperative Downlink Multicell Preprocessing Relying on Reduced-Rate Back-Haul Data Exchange
Different-complexity multicell preprocessing (MCP) schemes employing distributed signal-to-interference leakageplus-noise ratio (SILNR) precoding techniques are proposed, which require reduced back-haul data exchange in comparison with the conventional MCP structure. Our results demonstrate that the proposed structures are capable of increasing the throughput achievable in the cell-edge area while offering different geographic rate profile distributions, as well as meeting different delay requirements
Degenerations of Ricci-flat Calabi-Yau manifolds
This paper is a sequel to arXiv:1012.2940. We further investigate the
Gromov-Hausdorff convergence of Ricci-flat K\"{a}hler metrics under
degenerations of Calabi-Yau manifolds. We extend Theorem 1.1 in arXiv:1012.2940
by removing the condition on existence of crepant resolutions for Calabi-Yau
varieties.Comment: An error is correcte
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