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4 papers · 2 filters
Single top quark production and decay in the t-channel at next-to-leading order at the LHC
Reinhard Schwienhorst, Qing-Hong Cao, C. -P. Yuan +1
We present a study of single top and single antitop quark production in the t-channel mode at the LHC pp collider at 7 TeV, 10 TeV and 14 TeV, including next-to-leading order QCD c…
The Limits of Custodial Symmetry
R. Sekhar Chivukula, Stefano Di Chiara, Roshan Foadi +1
We introduce a toy model implementing the proposal of using a custodial symmetry to protect the Zbb coupling from large corrections. This "doublet-extended standard model" adds a w…
New parton distributions for collider physics
Hung-Liang Lai, Marco Guzzi, Joey Huston +4
We extract new parton distribution functions (PDFs) of the proton by global analysis of hard scattering data in the general-mass framework of perturbative quantum chromodynamics. O…
Axigluons cannot explain the observed top quark forward-backward asymmetry
R. Sekhar Chivukula, Elizabeth H. Simmons, C. -P. Yuan
We study an SU(3)^2 axigluon model introduced by Frampton, Shu, and Wang to explain the recent Fermilab Tevatron observation of a significant positive enhancement in the top quark…