78 citations · 258 across the 16 of their papers we have counts for
8 papers · 1 filter
Bounds on Four-Fermion Contact Interactions Induced by String Resonances
P. Burikham, T. Han, F. Hussain +1
Based on tree-level open-string scattering amplitudes in the low string-scale scenario, we derive the massless fermion scattering amplitudes. The amplitudes are required to reprodu…
Covariant L-S Scheme for the effective N*NM couplings
B. S. Zou, F. Hussain
For excited nucleon states of arbitrary spin coupling to nucleon (N) and meson (M), we propose a Lorentz covariant orbital-spin (L-S) scheme for the effective couplin…
One-pion transitions between heavy baryons in the constituent quark model
F. Hussain, J. G. Koerner, Salam Tawfiq
Single pion transitions of S wave to S wave, P wave to S wave and P wave to P wave heavy baryons are analyzed in the framework of the Heavy Quark Symmetry limit (HQS). We use a con…
light diquark symmetry and current-induced heavy baryon transition form factors
F. Hussain, J. G. Körner, J. Landgraf +1
We study the current-induced bottom baryon to charm baryon transitions in the Heavy Quark Symmetry limit as . Our discussion involves -wave to -wave…
Current s-Quark Mass Corrections to the Form Factors of D-Meson Semileptonic Decays
F. Hussain, A. N. Ivanov, N. I. Troitskaya
The infinite mass effective theory, when a heavy quark mass tends to infinity, and Chiral perturbation theory at the quark level, based on the extended Nambu -- Jona -- Lasinio mod…
An Introduction to the Heavy Quark Effective Theory
F. Hussain, G. Thompson
These lecture notes begin with a brief survey of the physics of heavy quark systems. This discusion motivates the introduction of the Heavy Quark Effective theory (HQET) which capt…
Heavy Quark Effective Theory, Interpolating Fields and Bethe-Salpeter Amplitudes
F. Hussain, G. Thompson
We use the LSZ reduction theorem and interpolating fields, alongwith the heavy quark effective theory, to investigate the structure of the Bethe-Salpeter amplitude for heavy hadron…
Hadrons of Arbitrary Spin and Heavy Quark Symmetry
F. Hussain, G. Thompson, J. G. Koerner
We present a general construction of the spin content of the Bethe-Salpeter amplitudes (covariant wave functions) for heavy hadrons with arbitrary orbital excitations, using repres…