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Sep 24 – 29, 2023
US/Eastern timezone

The H dibaryon from SU(3)-flavor-symmetric QCD

Not scheduled
20m
Durham Convention Center

Durham Convention Center

Talk Low Energy Spin Physics with Lepton, Photon and Hadron Probes

Speaker

Andrew Hanlon (Brookhaven National Laboratory)

Description

There exists an unresolved discrepancy regarding calculations of two-baryon interactions from lattice QCD. This difference initially began as a disagreement between two very different methods (i.e. Lüscher’s two-particle quantization condition and the HAL QCD potential method), leading to questions regarding the control over systematics within each method. For instance, Lüscher’s quantization condition relies on the two-hadron finite-volume spectrum which can be affected by unwanted excited-state contamination within a lattice QCD calculation, especially in cases where a severe signal-to-noise problem exists like in multi-baryon systems. In this talk, I will show calculations for two-lambda baryon interactions, from which the H-dibaryon binding energy can be estimated, utilizing the variational approach for extracting finite-volume energies reliably. This work includes six lattice spacings, allowing us to take a continuum limit which is found to be necessary for obtaining correct results, and marks the first time this systematic has ever been controlled in a lattice QCD calculation.

Primary author

Andrew Hanlon (Brookhaven National Laboratory)

Presentation materials

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