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CERN LHC signals from warped extra dimensions

Agashe, Kaustubh, Belyaev, Alexander, Krupovnickas, Tadas, Perez, Gilad and Virzi, Joseph (2008) CERN LHC signals from warped extra dimensions Physical Review D, 77, (1), 015003-[11pp]. (doi:10.1103/PhysRevD.77.015003).

Record type: Article

Abstract

We study production of Kaluza-Klein (KK) gluons at the Large Hadron Collider (LHC) in the framework of a warped extra dimension with the standard model fields propagating in the bulk. We show that the detection of the KK gluon is challenging since its production is suppressed by small couplings to the proton’s constituents. Moreover, the KK gluon decays mostly to top pairs due to an enhanced coupling and hence is broad. Nevertheless, we demonstrate that for MKKG?4??TeV, 100??fb-1 of data at the LHC can provide discovery of the KK gluon. We utilize a sizable left-right polarization asymmetry from the KK gluon resonance to maximize the signal significance, and we explore the novel feature of extremely highly energetic “top-jets.” We briefly discuss how the detection of electroweak gauge KK states (Z/W) faces a similar challenge since their leptonic decays (golden modes) are suppressed. Our analysis suggests that other frameworks, for example, little Higgs, which rely on UV completion via strong dynamics might face similar challenges, namely, (1) suppressed production rates for the new particles (such as Z?), due to their “light-fermion-phobic” nature, and (2) difficulties in detection since the new particles are broad and decay predominantly to third generation quarks and longitudinal gauge bosons

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Published date: 8 January 2008
Organisations: High Energy Physics

Identifiers

Local EPrints ID: 141728
URI: http://eprints.soton.ac.uk/id/eprint/141728
ISSN: 1550-7998
PURE UUID: a6f9fc4d-541c-4d9d-98fa-890dd85ffbc5
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 21 May 2010 14:25
Last modified: 18 Jul 2017 23:12

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Contributors

Author: Kaustubh Agashe
Author: Alexander Belyaev ORCID iD
Author: Tadas Krupovnickas
Author: Gilad Perez
Author: Joseph Virzi

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