Hadronic molecules for charmed and bottom baryons near thresholds

Abstract

We study hadronic molecules formed by a heavy meson and a nucleon, DN and D*N (BbarN and Bbar*N) systems. Respecting the heavy quark symmetry and chiral symmetry, we consider the DN-D*N (BbarN-Bbar*N$) mixing induced by the one boson exchange potential including the tensor force. We find many bound and resonant states with J^P=1/2^\pm, 3/2^\pm, 5/2^\pm and 7/2^- in isospin singlet channels, while only a few resonant states with J^P=1/2^- in isospin triplet channels. The analysis of DN and D*N (BbarN and Bbar*N) molecules will be useful to study mass spectra of excited charmed (bottom) baryons with large angular momenta, when their masses are close to the DN and D*N (BbarN and Bbar*N) thresholds.Comment: 22 pages, 3 figure

Hidden-charm pentaquarks as a meson-baryon molecule with coupled channels for D¯(*)ΛYamaguchi1, Santopinto2 2017Phys. Rev. DSelf Cite662410View full textAdd to dashboardCite

“…Fig. 1 does not show the bound states with large binding energy because the hadronic molecular picture is not applicable to the deeply bound state [36,46]. Fig.…”

“…This mechanism has been suggested to have an important role in theD ( * ) N system in Refs. [43][44][45][46][47][48][49][50]. The coupledchannel analysis with the mixing of S -wave and Dwave was not performed in Refs.…”

Charmed baryons circa 2015

“…Because Λ c (2940) + and Σ c (2800) are barely below the D * 0 p and DN thresholds, respectively, it is tempting to conjecture an exotic molecular structure of D * 0 and p for the former and a molecular state of DN for the latter [27,[40][41][42][43][44]. Likewise, Ξ c (2980) could be a molecular state of DΛ.…”

“…A coupled-channel calculation of the baryon-meson N D system has been performed to look for an isospinspin channel that is attractive enough to form a molecular state [42,45]. (I)J P = (0) − (see Fig.…”

Exotic baryons as a hadronic molecule in the heavy quark region

“…In theDN −D * N systems, theD −D * mixing enhances the effect of the one pion exchange potential (OPEP) having the tensor force producing the strong attraction [30][31][32][33][34][35]. We expect that this mixing is also helpful to produce the attraction in the hidden-charm molecules.…”