458 citations
- Williams (United States)US99 papers
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6 papers · 2 filters
Higgs Masses in the Four Generation MSSM
Sean Litsey, Marc Sher
In the Minimal Supersymmetric Standard Model (MSSM) with three generations of fermions, there is a stringent upper bound on the mass of the lightest neutral Higgs h, and the mass o…
A relativistic quark model for the Omega- electromagnetic form factors
G. Ramalho, K. Tsushima, Franz Gross
We compute the Omega- electromagnetic form factors and the decuplet baryon magnetic moments using a quark model application of the Covariant Spectator Theory. Our predictions for t…
Spin and orbital angular momentum of the proton
A. W. Thomas
Since the announcement of the proton spin crisis by the European Muon Collaboration there has been considerable progress in unravelling the distribution of spin and orbital angular…
Nucleon electromagnetic and gravitational form factors from holography
Zainul Abidin, Carl E. Carlson
The electromagnetic form factors of nucleons are calculated using an AdS/QCD model by considering a Dirac field coupled to a vector field in the 5-dimensional AdS space. We also ca…
Neutral pion photoproduction at high energies
A. Sibirtsev, J. Haidenbauer, S. Krewald +2
A Regge model with absorptive corrections is employed in a global analysis of the world data on the reactions gamma p -> pi0 p and gamma n -> pi0 n for photon energies from 3 to 18…
Medium modifications of the bound nucleon GPDs and the quark contribution to the spin sum rule
V. Guzey, A. W. Thomas, K. Tsushima
We estimate the nuclear medium modifications of the quark contribution to the bound nucleon spin sum rule, J^{q*}, as well as the separate helicity, ΔΣ*, and the angular momentum,…