PT Journal
AU Dai, LR
   Oset, E
   Feijoo, A
   Molina, R
   Roca, L
   Martinez Torres, A
   Khemchandani, KP
TI Masses and widths of the exotic molecular B-(s)(()*B-)((s))(*()) states
SO Physical Review D
JI Phys. Rev. D
PY 2022
BP 074017
EP 11pp
VL 105
IS 7
DI 10.1103/PhysRevD.105.074017
LA English
AB We study the interaction of the doubly bottom systems BB, B*B, BsB, B-s*B, B*B*, B*B-S, B*B-s*, BsBs, BsBs*, B-s*B-s* by means of vector meson exchange with Lagrangians from an extension of the local hidden gauge approach. The full s-wave scattering matrix is obtained implementing unitarity in coupled channels by means of the Bethe-Salpeter equation. We find poles below the channel thresholds for the attractively interacting channels B*B in I = 0, B-s*B – B*B-s in I = 1/2, B* B* in I = 0, and B-s*B* in I = 1/2, all of them with J(P) = 1(+). For these cases the widths are evaluated identifying the dominant source of imaginary part. We find binding energies of the order of 10-20 MeV, and the widths vary much from one system to the other: of the order of 10-100 eV for the B* B system and B-s*B – B* B-s, about 6 MeV for the B*B* system and of the order of 0.5 MeV for the B-s*B* system.
ER