Stringy origin of Tevatron Wjj anomaly

Details Stringy origin of Tevatron Wjj anomaly Stringy origin of Tevatron Wjj anomaly

2011-04-12

arxiv.org/abs/1104.2302v3

Phys.Lett.B701:224-228,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

v1 8 pages revtex; v2 better fit to the data (Z" within LHC reach), references added; v3 to appear in PLB

Scientific paper

10.1016/j.physletb.2011.05.049

The invariant mass distribution of dijets produced in association with W bosons, recently observed by the CDF Collaboration at Tevatron, reveals an excess in the dijet mass range 120-160 GeV/c^2, 3\sigma beyond Standard Model expectations. We show that such an excess is a generic feature of low mass string theory, due to the production and decay of a leptophobic Z', a singlet partner of SU(3) gluons coupled primarily to the U(1) baryon number. In this framework, U(1) and SU(3) appear as subgroups of U(3) associated with open strings ending on a stack of 3 D-branes. In addition, a minimal model contains two other stacks to accommodate the electro-weak SU(2) \in U(2) and the hypercharge U(1). Of the three U(1) gauge bosons, the two heavy Z' and Z" receive masses through the Green-Schwarz mechanism. For a given Z' mass, the model is quite constrained. Fine tuning three of its free parameters is just sufficient to simultaneously ensure: a small Z-Z' mixing in accord with the stringent LEP data on the $Z$ mass; very small (less than 1%) branching ratio into leptons; and a large hierarchy between Z" and Z' masses. The heavier neutral gauge boson Z" is within the reach of LHC.

Affiliated with

Also associated with

No associations

Rating

Stringy origin of Tevatron Wjj anomaly 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 Stringy origin of Tevatron Wjj anomaly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stringy origin of Tevatron Wjj anomaly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-731145