Spectroscopy of triply charmed baryons from lattice QCD

Abstract

The spectrum of excitations of triply-charmed baryons is computed using lattice QCD including dynamical light quark fields. Calculations are performed on anisotropic lattices with temporal and spatial spacings at = 0.0351(2) fm and as ∼ 0.12 fm respectively and with pion mass of about 390 MeV. The spectrum obtained has baryonic states with well-defined total spin up to 7 2 and the lowlying states closely resemble the expectation from models with an SU (6) × O(3) symmetry. Energy splittings between extracted states, including those due to spin-orbit coupling in the heavy quark limit are computed and compared against data at other quark masses.

Weak decays of doubly heavy baryons: the $$1/2\rightarrow 1/2$$ 1 / 2 → 1 / 2 case

“…The doubly heavy baryon systems with the quark contents Q 1 Q 2 q with Q 1,2 = b, c and q = u, d, s have been studied extensively using various theoretical methods, such as quark models [43][44][45][46], the bag model [47], QCD sum rules [48], heavy quark effective theory [49,50], Lattice QCD simulation [51][52][53][54][55][56][57], etc. For cc , most predictions are in the range 3.5 to 3.7 GeV.…”

Heavy and light hadron spectroscopy on lattice

“…Moving to baryons, the Hadron Spectrum Collaboration has recently computed very extensive excited spectra of light and strange baryons with all possible flavour combinations [13] and of charmed baryons [14,15,16], extending earlier computations of non-strange N and ∆ baryon spectra [17,18]. Interpolating operators featuring three fermion fields were used and calculations were performed with the same lattice set up as above but with a different lattice volume (spatial extent L s ≈ 1.9 fm).…”

Interpretation of the new $$\Omega _c^{0}$$ Ω c 0 states via their mass and width

“…Theoretical investigations performed in the context of different approaches, and predictions obtained for the spectroscopic parameters provide incomparably more detailed a e-mail: azizi.hep.ph@gmail.com information on the features of the 0 c baryons than experimental data . In fact, the masses of the ground-state and radially/orbitally excited heavy baryons including the 0 c particles were calculated using the relativistic quark models [3,9,10], the QCD sum rule method [4,5,7,8,[14][15][16]21,22,24,25], the heavy-quark effective theory (HQET) [6], various quark models [11][12][13]17,18,23], and lattice simulations [19,20]. The strong couplings and transitions of the heavy flavored baryons, their magnetic moments and radiative decays also attracted interest of physicists [24][25][26][27][28][29][30][31][32][33][34].…”

“…As is seen, there are different structures in Eq. (20), which can be used to derive the sum rules for the strong couplings. We work with the structures / q / pγ 5 and / pγ 5 .…”