Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-04-07
Phys.Lett.B701:93-100,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX 17 pages. Additional references and comments, matching PLB version
Scientific paper
10.1016/j.physletb.2011.05.037
We use a recent upper limit from CDF on like-sign top pair production to place constraints on general new vector bosons and scalars mediating u u -> t t. The possible vector bosons comprise neutral colour singlets or octets, and charge 4/3 colour triplets or sextets, whereas the new scalars can be neutral colour singlets or octets and charge 4/3 colour sextets. We also estimate the expected bounds from like-sign top pair production at LHC in the near future. Then, we address the implications of these limits for the forward-backward asymmetry in t tbar production measured at Tevatron. In particular, we find that models explaining the observed asymmetry by the exchange of a single t-channel heavy Z' boson are already excluded. On the other hand, light Z' bosons with a mass M_Z' ~ 150 GeV, which could also account for a recent CDF dijet excess in W+jet production, are barely allowed.
Aguilar-Saavedra Juan Antonio
Perez-Victoria Manuel
No associations
LandOfFree
No like-sign tops at Tevatron: Constraints on extended models and implications for the t tbar asymmetry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with No like-sign tops at Tevatron: Constraints on extended models and implications for the t tbar asymmetry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and No like-sign tops at Tevatron: Constraints on extended models and implications for the t tbar asymmetry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-718118