POSSIBLE $D\bar{D}$ AND $B\bar{B}$ MOLECULAR STATES IN A CHIRAL QUARK MODEL

Abstract

We perform a systematic study of the bound state problem of [Formula: see text] and [Formula: see text] systems by using effective interaction in our chiral quark model. Our results show that both the interactions of [Formula: see text] and [Formula: see text] states are attractive, which consequently result in [Formula: see text] and [Formula: see text] bound states.

Reanalysis of thee+e−→(D*Torres1, Khemchandani2, Navarra3 et al. 2014Phys. Rev. D19150View full textAdd to dashboardCite

“…[3] it was shown that the bump was better interpreted in terms of a DD molecular state, below the DD threshold (so called X(3700)), that had been predicted in Ref. [4] and has also been found theoretically in other works [5][6][7][8][9]. Similarly, in Ref.…”

Prediction of anI=1DD¯*state and relationship to the claimedAceti1, Bayar2, Oset3 et al. 2014Phys. Rev. D13641260View full textAdd to dashboardCite

“…In this sense, a bound state of DD was theoretically found in [6] and tentatively called X(3700). Other works have also reported on this possibility [7][8][9][10][11][12]. Subsequently, experimental support for such a state was found in [13] from a bump close to the threshold of the DD invariant mass distribution in the e + e → J/ψDD reaction [14].…”

Hidden beauty molecules within the local hidden gauge approach and heavy quark spin symmetry

“…The work on the charm sector is gradually moving to the beauty sector and there are works dealing with b or hidden b meson molecules built up from other mesons containing some b quark [17][18][19][20][21][22][23][24]. The recent discovery of the hidden beauty Z b (10610) and Z b (10650) states in three charge states [25][26][27], and hence with isospin I=1, has brought a new stimulus to the molecular idea [20,21,23], since they cannot be bb quarkonium states.…”