Weak-decay searches for $Qs\bar{u}\bar{d}$ tetraquarks

Abstract

We propose to search for the open heavy-flavor exotic states with the quark components of $Qs\bar{u}\bar{d}$ with $Q=b,c$ via their weak decays. If there exist such exotic states below the $BK$ or $DK$ thresholds, they can only decay weakly. The advantages include: (i) the experimental backgrounds from the secondary decay vertex are much lower due to the long lifetimes, (ii) the productions are large enough for only one heavy quark in such states, (iii) the thresholds of $BK$ or $DK$ are about 260 MeV higher compared to the $B_s\pi$ or $D_s\pi$ thresholds of the configurations of $Qu\bar{s}\bar{d}$ or $Qd\bar{s}\bar{u}$ , with a higher possibility to exist such weakly-decay particles, and (iv) if observed, their inner structures are easier understood since they can not be induced by the kinematic effects.

5 pages, 4 figures

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Cited by in corpus (5)

• Exploring fully heavy scalar tetraquarks $QQ\overline{Q}\overline{Q}$
• Unified description of the $Qs\bar{q}\bar{q}$ molecular bound states, molecular resonances and compact tetraquark states in the quark potential model
• Diagrammatic analysis of hidden- and open-charm tetraquark production in $B$ decays
• $D_1(2420)$ and its interactions with a kaon: open charm states with strangeness
• Isospin sum rules for the nonleptonic $B$ decays