August 28, 2011 to September 2, 2011
Fermilab
US/Central timezone
Slides available on Indico -- there are no formal proceedings

Bounds from LEP on unparticle interactions with electroweak bosons

Aug 28, 2011, 3:50 PM
20m
F: Wilson Hall 3NE

F: Wilson Hall 3NE

Speaker

Mr Simon Knapen Knapen (Rutgers, the state university of New Jersey)

Description

A conformally invariant hidden sector is considered, with a scalar operator O of low dimension that couples to the electroweak gauge bosons of the standard model, via terms such as F_μν F_μν O. By examining single photon production at LEP, we bound the strength of these interactions. We apply our results, along with those of Delgado and Strassler [A. Delgado and M. J. Strassler, Phys. Rev. D 81, 056003(2010).] and of Caracciolo and Rychkov [F. Caracciolo and S. Rychkov, Phys. Rev. D 81, 085037 (2010).], to improve the bound on 4γ production through “unparticle self-interactions,” as proposed by Feng et al. [J. L. Feng, A. Rajaraman, and H. Tu, Phys. Rev. D 77, 075007 (2008).]. We find the maximum allowable cross section is of order a few tens of femtobarns at the 14 TeV LHC, and lies well below 1 fb for a wide range of parameters.

Presentation materials