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2010

Bounds from LEP on unparticle interactions with electroweak bosons

Kathrein, Scott, Knapen, Simon, Strassler, Matthew J.

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A conformally invariant hidden sector is considered, with a scalar operator $O$ of low dimension that couples to the electro-weak gauge bosons of the Standard Model, via terms such as $O F^{\mu\nu}F_{\mu\nu}$.

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 and of Caracciolo and Rychkov, to improve the bound on four-photon production through "unparticle self-interactions", as proposed by Feng et al.
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.

Bounds from LEP on unparticle interactions with electroweak bosons · Around

Built on

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B. Field, S. Dawson and J. Smith, Scalar and pseudoscalar Higgs boson plus one jet production at the LHC and Tevatron , Phys. Rev. D
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Earlier work this paper cites.
K. Cheung, W.-Y. Keung and T.-C. Yuan, Collider Phenomenology of Unparticle Physics , Phys. Rev. D
Original
2007
Earlier work this paper cites.

Similar

M. J. Strassler and K. M. Zurek, Echoes of a hidden valley at hadron colliders , Phys. Lett. B
2007
Cited alongside, same era.
J. L. Feng, A. Rajaraman and H. Tu, Unparticle self-interactions and their collider implications , Phys. Rev. D
Original
2008
Cited alongside, same era.
B. Grinstein, K. A. Intriligator and I. Z. Rothstein, Comments on Unparticles , Phys. Lett. B
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2008
Cited alongside, same era.
F. Caracciolo and S. Rychkov, Rigorous Limits on the Interaction Strength in Quantum Field Theory , arXiv:0912.2726 [hep-th]
Original
Cited in the paper.
G. Barbiellini et al
Original
Cited in the paper.

Then

A. E. Nelson, M. Piai and C. Spitzer, Protecting unparticles from the MSSM Higgs sector , Phys. Rev. D
Original
2009
Later among the works it cites.
A. Delgado and M. J. Strassler, A Simple-Minded Unitarity Constraint and an Application to Unparticles , Phys. Rev. D
Original
2010
Closest in time.
H. Georgi, Unparticle physics , Int. J. Mod. Phys. A
2010
Closest in time.

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