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出版SISSA, 2022
URLhttp://books.google.com.hk/books?id=_BUJ0AEACAAJ&hl=&source=gbs_api
註釋We present our recent results on antiheavy-antiheavy-light-light tetraquark systems using lattice QCD. Our study of the b ̄b ̄us four-quark system with quantum numbers JP=1+ and the b ̄c ̄ud four-quark systems with I(JP)=0(0+) and I(JP)=0(1+) utilizes scattering operators at the sink to improve the extraction of the low-lying energy levels. We found a bound state for b ̄b ̄us with Ebind,b ̄b ̄us=(-86±22±10)MeV, but no indication for a bound state in both b ̄c ̄ud channels. Moreover, we show preliminary results for b ̄b ̄ud with I(JP)=0(1+), where we used scattering operators both at the sink and the source. We found a bound state and determined its infinite-volume binding energy with a scattering analysis, resulting in Ebind,b ̄b ̄ud=(-103±8)MeV.