Constraining the unHiggs model with LHC data

Englert, C. , Netto, D. G., Spannowsky, M. and Terning, J. (2012) Constraining the unHiggs model with LHC data. Physical Review D, 86(3), 035010. (doi: 10.1103/PhysRevD.86.035010)

Abstract

Recent measurements by the ATLAS and CMS experiments have excluded the standard model Higgs boson in the high mass region, even if it is produced with a significantly smaller cross section than expected. The bounds are dominated by the nonobservation of a signal in the clean gold-plated mode h→ZZ→4ℓ and, hence, are directly related to the special role of the Higgs in electroweak symmetry breaking. A smaller cross section in comparison to the standard model is expected if the Higgs is realized as an unparticle in the unHiggs scenario. With the LHC probing σ/σSM<1, we can therefore reinterpret the h→ZZ→4ℓ exclusion limits as bounds on the unHiggs’ scaling dimension. Throughout the high Higgs mass range, where we expect a large signal in the presence of the standard model Higgs for the 2011 ATLAS and CMS data sets, the observed limits translate into mild bounds on the unHiggs scaling dimension in the high mass region.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Englert, Professor Christoph
• Authors: Englert, C., Netto, D. G., Spannowsky, M., and Terning, J.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review D
• Publisher: American Physical Society
• ISSN: 1550-7998
• ISSN (Online): 1550-2368