Elizabeth E. Jenkins

Spin flavor structure of large N(c) baryons

The spin-flavor structure of large [ital N][sub [ital c]] baryons is described in the 1/[ital N][sub [ital c]] expansion of QCD using quark operators. The complete set of quark operator identities is obtained, and used to derive an operator reduction rule which simplifies the 1/[ital N][sub [ital c]] expansion. The operator reduction rule is applied to the axial vector currents, masses, magnetic moments, and hyperon nonleptonic decay amplitudes in the SU(3) limit, to first order in SU(3) breaking, and without assuming SU(3) symmetry. The connection between the Skyrme and quark operator representations is discussed. An explicit formula is given for the quark model operators in terms of the Skyrme model operators to all orders in 1/[ital N][sub [ital c]] for the two flavor case.

Heavy baryon masses in the 1/m(Q) and 1/N(c) expansions

The masses of baryons containing a single heavy quark are studied in a combined expansion in

The un-unified standard model

1/m_Q

A light top quark after all

,

Flavor symmetry breaking in the 1/{ital N}{sub {ital c}} expansion

1/N_c

Chiral Lagrangian for baryons in the 1/n(c) expansion

and

Rare top quark decayst→bW+Zandt→cW+W−

SU(3)

Searching for a (B−L) gauge boson in pp collisions

flavor symmetry breaking. Heavy quark baryon mass splittings are related to mass splittings of the octet and decuplet baryons. The

Gluon-axigluon decay of the Z0

Sigma_c^*

A Lattice Test of 1/N(c) Baryon Mass Relations

,