Beautiful baryons from lattice QCD

Baryons from Lattice Qcd

In this synopsis, I report on non-perturbative studies of various aspects of baryon physics using lattice QCD. The first part of the thesis consists of spectroscopy of baryons with one or more charm quarks using two complementary non-perturbative approaches. The first approach enables us to extract highly excited states, which are very difficult to extract using the previously existing lattice ...

Charmed baryons from lattice QCD

Charmed baryons in lattice QCD

Masses of singly and doubly charmed baryons are calculated in quenched lattice QCD using an improved action of the D234 type on an anisotropic lattice. The mass differences between spin 3/2 and spin 1/2 baryon states are calculated and compared to mass differences between vector and pseudoscalar mesons. The suppression of spin splittings in mesons containing heavy quarks, characteristic of quen...

Spin-3/2 baryons in lattice QCD

We present first results for masses of spin-3/2 baryons in lattice QCD, using a novel fat-link clover fermion action in which only the irrelevant operators are constructed using fat links. In the isospin-1/2 sector, we observe, after appropriate spin and parity projection, a strong signal for the J = 3 2 − state, and find good agreement between the 1 2 + mass and earlier nucleon mass simulation...

Excited-state spectroscopy of triply-bottom baryons from lattice QCD

The spectrum of baryons containing three b quarks is calculated in nonperturbative QCD, using the lattice regularization. The energies of ten excited bbb states with J = 1 2 + , 3 2 + , 5 2 + , 7 2 + , 1 2 − , and 3 2 − are determined with high precision. A domain-wall action is used for the up-, downand strange quarks, and the bottom quarks are implemented with NRQCD. The computations are done...