TY  - JOUR
A1  - Leskovec, Luka
A1  - Meinel, Stefan
A1  - Pflaumer, Martin
A1  - Wagner, Marc
T1  - Lattice QCD investigation of a doubly-bottom b̄b̄ud tetraquark with quantum numbers I(JP) = 0(1⁺)
T2  - Physical review. D : covering particles, fields, gravitation, and cosmology
N2  - We use lattice QCD to investigate the spectrum of the ¯𝑏¯𝑏⁢𝑢⁢𝑑 four-quark system with quantum numbers 𝐼⁡(𝐽𝑃)=0⁢(1+). We use five different gauge-link ensembles with 2+1 flavors of domain-wall fermions, including one at the physical pion mass, and treat the heavy ¯𝑏 quark within the framework of lattice nonrelativistic QCD. Our work improves upon previous similar computations by considering in addition to local four-quark interpolators also nonlocal two-meson interpolators and by performing a Lüscher analysis to extrapolate our results to infinite volume. We obtain a binding energy of (−128±24±10)  MeV, corresponding to the mass (10476±24±10)  MeV, which confirms the existence of a ¯𝑏⁢¯𝑏⁢𝑢⁢𝑑 tetraquark that is stable with respect to the strong and electromagnetic interactions.
Y1  - 2019
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/84612
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-846126
SN  - 2470-0029
SN  - 2470-0010
VL  - 100
IS  - 1, 014503
PB  - American Physical Society
CY  - Ridge, NY
ER  -