Study of possible molecular states of Ds (∗) Ds (∗) and Bs (∗) Bs (∗)

Ke, HW, Shi, YL (June 2022) Study of possible molecular states of Ds (∗) Ds (∗) and Bs (∗) Bs (∗). Physical Review D, 105 (11). ISSN 2470-0010

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Abstract

Recently the LHCb Collaboration reported a new exotic state Tcc+ which is conjectured to be a molecular state of D0D∗+ (or D∗0D+) theoretically. Belle Collaboration also searched for tetraquark state Xccss in DsDs (Ds∗Ds∗) final states but no significant signals were observed, which did not rule out the existence of Xccss as a molecular state of DsDs (Ds∗Ds∗). Inspired by these experimental results on double charmed exotic state, in this paper we study whether the molecular bound states of Ds(∗)Ds(∗) and Bs(∗)Bs(∗) can exist with the Bethe-Salpeter (BS) equation approach. We employ heavy meson chiral perturbation theory and one-boson-exchange approximation to calculate the interaction kernels in the BS equations. Our numerical results suggest that two Bs∗ mesons perhaps form a 0+ molecular state. Future experimental search for Xccss and Xbbss states in other decay channels may shed light on the structure of double charmed exotic state.

Item Type:	Paper
CSHL Authors:	Shi, Yan-Liang
Communities:	CSHL labs > Engel lab
SWORD Depositor:	CSHL Elements
Depositing User:	CSHL Elements
Date:	1 June 2022
Date Deposited:	21 Jul 2022 22:25
Last Modified:	21 Jul 2022 22:25
URI:	https://repository.cshl.edu/id/eprint/40683

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