Search for b ¯ b ¯ u s and b ¯ c ¯ u d tetraquark bound states using lattice QCD

Meinel, Stefan; Pflaumer, Martin; Wagner, Marc

doi:10.1103/PhysRevD.106.034507

Title: Search for $\bar{b} \bar{b} u s$ and $\bar{b} \bar{c} u d$ tetraquark bound states using lattice QCD

Journal Article · Wed Aug 17 00:00:00 EDT 2022 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.106.034507· OSTI ID:1881991

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We use lattice QCD to investigate the existence of strong-interaction-stable antiheavy-antiheavy-light-light tetraquarks. We study the $$\bar{bb}us$$ system with quantum numbers J^P = 1⁺ as well as the $$\bar{b} \bar {c} ud$$ systems with quantum numbers I(J^P) = 0(0⁺) and I(J^P) = 0(1⁺). We carry out computations on five gauge-link ensembles with 2 + 1 flavors of domain-wall fermions, including one at the physical pion mass. The bottom quarks are implemented using lattice nonrelativistic QCD, and the charm quarks using an anisotropic clover action. In addition to local diquark-antidiquark and local meson-meson interpolating operators, we include nonlocal meson-meson operators at the sink, which facilitates the reliable determination of the low-lying energy levels. We find clear evidence for the existence of a strong-interaction-stable $$\bar{bb}us$$ tetraquark with binding energy (–86 ± 22 ± 10) MeV and mass (10609 ± 22 ± 10) MeV. For the $$\bar{b} \bar {c} ud$$ systems we do not find any indication for the existence of bound states, but cannot rule out their existence either.

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Research Organization:: Univ. of Arizona, Tucson, AZ (United States); Univ. of California, Oakland, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); German Research Foundation (DFG); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)

Grant/Contract Number:: SC0009913; AC02-05CH11231; ACI-1548562

OSTI ID:: 1881991

Alternate ID(s):: OSTI ID: 1980154

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 106 Journal Issue: 3; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Search for b ¯ b ¯ u s and b ¯ c ¯ u d tetraquark bound states using lattice QCD

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Title: Search for $\bar{b} \bar{b} u s$ and $\bar{b} \bar{c} u d$ tetraquark bound states using lattice QCD