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Top quark spin correlations in the Randall-Sundrum model at the CERN Large Hadron Collider

Author

Arai Masato	High Energy Physics Division, Department of Physical Sciences, University of Helsinki and Helsinki Institute of Physics
Okada Nobuchika	KEK, Japan
Smolek Karel, Ing., Ph.D.	IEAP
Šimák Vladislav	FNSPE CTU

Year

2007

Scientific journal

Phys. Rev. D 75 (2007) 095008

Web

http://link.aps.org/abstract/PRD/v75/e095008

Abstract

In the Randall-Sundrum model, we study top-antitop pair production and top spin correlations at the Large Hadron Collider. In addition to the standard model processes, there is a new contribution to the top-antitop pair production process mediated by graviton Kaluza-Klein modes in the s-channel. We calculate the density matrix for the top-antitop pair production including the new contribution. With a reasonable parameter choice in the Randall-Sundrum model, we find a sizable deviation of the top-antitop pair production cross section and the top spin correlations from those in the standard model. In particular, resonant productions of the graviton Kaluza-Klein modes give rise to a remarkable enhancement of such a deviation.

Cite article as:

M. Arai, N. Okada, K. Smolek, V. Šimák, "Top quark spin correlations in the Randall-Sundrum model at the CERN Large Hadron Collider", Phys. Rev. D 75 (2007) 095008 (2007)