361 citations · 1.5k across the 34 of their papers we have counts for
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Universal Torsion Induced Interaction from Large Extra Dimensions
Tatsu Takeuchi, Lay Nam Chang, Oleg Lebedev +1
We consider a model with extra compact dimensions in which only gravity exists in the 4+n dimensional bulk. If the gravitational connection is not assumed to be symmetric, that is,…
Constraints on Gauged B-3L_tau and Related Theories
Lay Nam Chang, Oleg Lebedev, Will Loinaz +1
We consider extensions of the Standard Model with an extra U(1) gauge boson which couples to B-(alpha L_e + beta L_mu + gamma L_tau) with alpha + beta + gamma = 3. We show that the…
Universal Torsion-Induced Interaction from Large Extra Dimensions
Lay Nam Chang, Oleg Lebedev, Will Loinaz +1
We consider the Kaluza-Klein (KK) scenario in which only gravity exists in the bulk. Without the assumption of symmetric connection, the presence of brane fermions induces torsion.…
On the invisible decays of the Upsilon and J/Psi resonances
Lay Nam Chang, Oleg Lebedev, John N. Ng
We estimate the most important corrections to the branching ratios for the invisible decays of quarkonium states, arising from possible extensions of the standard model. Among the…
The Gerasimov-Drell-Hearn Sum Rule and Current Algebras
Lay Nam Chang, Yigao Liang, Ron L. Workman
The status of the Gerasimov-Drell-Hearn sum rules for polarized inclusive photo-production on nucleons is reviewed. It is shown that results from currently available data compare f…
Phenomenological Consequences of Singlet Neutrinos
Lay Nam Chang, Daniel Ng, John N. Ng
In this paper, we study the phenomenology of right-handed neutrino isosinglets. We consider the general situation where the neutrino masses are not necessarily given by ,…