2013 Fiscal Year Final Research Report
Lambda-Lambda potential from Lattice QCD simulations
| Project/Area Number |
24740144
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | University of Tsukuba |
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Principal Investigator |
SASAKI Kenji 筑波大学, 計算科学研究センター, 研究員 (80457134)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 理論核物理 / バリオン間相互作用 / 格子QCD / ストレンジネス / Hダイバリオン |
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| Research Abstract |
The baryon-baryon interactions with strangeness S=-2 system, especially for Lambda-Lambda interaction, had been investigated by solving the coupled channel Schroedinger equation using Nambu-Bethe-Salpeter wave functions which are evaluated on the lattice.
The potential matrix extracted by this method is guaranteed to reproduce the proper scattering phase shift by construction through the NBS wave function. Using this potential, the Lambda-Lambda and N-Xi scattering phase shifts are calculated. The results show that H-dibaryon state can be found with heavy quark mass environment but its energy tends to be higher as decreasing light quark masses resulting in a resonance state between Lambda-Lambda and N-Xi energy levels.
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