Doubly charmed baryon masses and quark wave functions in baryons

Abstract

We compute the masses of the ground state baryons and their spin excited states discussing quark wave functions in baryons. Doubly charmed baryon masses are given in the expected accuracy of Ϯ10 MeV.

Hyperfine mixing in semileptonic decay of doubly heavy baryons

“…[2]. However, masses are very insensitive to hyperfine mixing and most mass calculations [3,4,5,6,7,8,9,10,11,12,13,14] just ignore the mixing and use the S h -basis.…”

Search for doubly charmed baryons and study of charmed strange baryons at Belle

“…The lightest doubly charmed baryon contains two charm quarks and one up or down quark (Ξ þ cc ¼ ccd, Ξ þþ cc ¼ ccu), and the spin-parity of the ground state is expected to be 1 2 þ . The mass of the Ξ cc has been extensively studied theoretically, and the prediction of the quark model ranges from 3.48 GeV=c 2 to 3.74 GeV=c 2 [10][11][12][13][14][15][16][17][18][19][20][21][22], whereas the mass predicted by lattice QCD ranges from 3.51 GeV=c 2 to 3.67 GeV=c 2 [23][24][25][26][27]. The cross sections of the Ξ cc production in the process e þ e − → Ξ cc X at ffiffi ffi s p ¼ 10.58 GeV, where X denotes the remaining particles produced in the fragmentation, is predicted to be 70 fb in Ref.…”

Spectroscopy of doubly charmed baryons

“…Another striking result appearing in the obtained spectra concerns the J P = 1/2 + − J P = 3/2 + spin splitting, it appears to be much smaller than the one predicted based on potential models directly obtained from the cc spectra [5][6][7][8][9]. Such a small spin splitting seems to be related with our scale-dependent quark-gluon coupling constant and the fact that the ∆ − N mass difference is correctly reproduced.…”

“…The spin of the third quark is either parallel, J = 3/2, or anti-parallel, J = 1/2, to the diquark. The J = 3/2 state has been predicted to be heavier than the J = 1/2 state by around 80 MeV/c 2 [5][6][7][8][9]. For the ccc system the Pauli principle demands a J = 3/2 ground state.…”