The system in the channel (the most strange dibaryon) is studied on the basis of the ()-flavor lattice QCD simulations with a large volume and nearly physical pion mass at a lattice spacing of . We show that lattice QCD data analysis by the HAL QCD method leads to the scattering length , the effective range , and the binding energy . These results indicate that the system has an overall attraction and is located near the unitary regime. Such a system can be best searched experimentally by the pair-momentum correlation in relativistic heavy-ion collisions.
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"surname": "Miyamoto",
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"title": "Most Strange Dibaryon from Lattice QCD"
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"abstracts": [
{
"source": "APS",
"value": "The <math><mi>\u03a9</mi><mi>\u03a9</mi></math> system in the <math><mrow><mmultiscripts><mrow><msub><mrow><mi>S</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow><mprescripts></mprescripts><none></none><mrow><mn>1</mn></mrow></mmultiscripts></mrow></math> channel (the most strange dibaryon) is studied on the basis of the (<math><mrow><mn>2</mn><mo>+</mo><mn>1</mn></mrow></math>)-flavor lattice QCD simulations with a large volume <math><mrow><mo>(</mo><mn>8.1</mn><mtext> </mtext><mtext> </mtext><mi>fm</mi><msup><mrow><mo>)</mo></mrow><mrow><mn>3</mn></mrow></msup></mrow></math> and nearly physical pion mass <math><msub><mi>m</mi><mi>\u03c0</mi></msub><mo>\u2243</mo><mn>146</mn><mtext> </mtext><mtext> </mtext><mi>MeV</mi></math> at a lattice spacing of <math><mi>a</mi><mo>\u2243</mo><mn>0.0846</mn><mtext> </mtext><mtext> </mtext><mi>fm</mi></math>. We show that lattice QCD data analysis by the HAL QCD method leads to the scattering length <math><msub><mi>a</mi><mn>0</mn></msub><mo>=</mo><mn>4.6</mn><mo>(</mo><mn>6</mn><mo>)</mo><msubsup><mo>(</mo><mrow><mo>\u2212</mo><mn>0.5</mn></mrow><mrow><mo>+</mo><mn>1.2</mn></mrow></msubsup><mo>)</mo><mtext> </mtext><mtext> </mtext><mi>fm</mi></math>, the effective range <math><msub><mi>r</mi><mi>eff</mi></msub><mo>=</mo><mn>1.27</mn><mo>(</mo><mn>3</mn><mo>)</mo><msubsup><mo>(</mo><mrow><mo>\u2212</mo><mn>0.03</mn></mrow><mrow><mo>+</mo><mn>0.06</mn></mrow></msubsup><mo>)</mo><mtext> </mtext><mtext> </mtext><mi>fm</mi></math>, and the binding energy <math><msub><mi>B</mi><mrow><mi>\u03a9</mi><mi>\u03a9</mi></mrow></msub><mo>=</mo><mn>1.6</mn><mo>(</mo><mn>6</mn><mo>)</mo><msubsup><mo>(</mo><mrow><mo>\u2212</mo><mn>0.6</mn></mrow><mrow><mo>+</mo><mn>0.7</mn></mrow></msubsup><mo>)</mo><mtext> </mtext><mtext> </mtext><mi>MeV</mi></math>. These results indicate that the <math><mi>\u03a9</mi><mi>\u03a9</mi></math> system has an overall attraction and is located near the unitary regime. Such a system can be best searched experimentally by the pair-momentum correlation in relativistic heavy-ion collisions."
}
],
"imprints": [
{
"date": "2018-05-23",
"publisher": "APS"
}
]
}