Evidence for a Bound Dibaryon from Lattice QCD
Journal Article
·
· Physical Review Letters
- Albert Einstein fur Fundamentale Physik, Bern (Switzerland); Univ. of New Hampshire, Durham, NH (United States)
- Univ. of Barcelona (Spain)
- College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Univ. of Washington, Seattle, WA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Indiana Univ., Bloomington, IN (United States)
We present evidence for the existence of a bound H-dibaryon, an I = 0, J = 0, s = -2 state with valence quark structure uuddss, at a pion mass of m$$_{\pi}$$ ~389 MeV. Extrapolating the results of lattice QCD calculations performed on four ensembles of anisotropic clover gauge-field configurations, with spatial extents of L ~ 2.0, 2.5, 3.0 and 3.9 fm at a spatial lattice spacing of bs ~ 0.123 fm, we find an H-dibaryon bound by B$$H\atop{\infty}$$ = 16.6 ± 2.1 ± 4.6 MeV at a pion mass of m$$_{\pi}$$ ~ 389 MeV.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- NPLQCD Collaboration
- DOE Contract Number:
- AC05-06OR23177; AC02-05CH11231; FG03-97ER4014; PHY-0645570; FIS2008-01661; FG02-04ER41302; SC0001784; CCF-0728915; FG02-07ER41527; AC52-07NA27344; FC02-07ER41457
- OSTI ID:
- 1013028
- Report Number(s):
- JLAB-THY-10-1296; DOE/OR/-23177-1373; arXiv:1012.3812; PRLTAO; TRN: US1102393
- Journal Information:
- Physical Review Letters, Vol. 106, Issue 16; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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