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Title: LHC signals from cascade decays of warped vector resonances

Recently (arXiv:1608.00526), a new framework for warped higher-dimensional compactifications with “bulk” standard model (SM) was proposed: in addition to the UV (Planck scale) and IR (a couple of TeV) branes, there is an intermediate brane, taken to be around 10TeV. The SM matter and Higgs fields propagate from the UV brane down to this intermediate brane only, while gauge and gravity fields propagate in the entire bulk. Such a configuration renders the lightest gauge Kaluza-Klein (KK) states within LHC reach, simultaneously satisfying flavor and CP constraints. In addition, the usual leading decay modes of the lightest KK gauge bosons into top and Higgs bosons are suppressed. This effect permits erstwhile subdominant channels to become significant. These include flavor-universal decays to SM fermions and Higgs bosons, and a novel channel — decay to a radion and a SM gauge boson, followed by radion decay to a pair of SM gauge bosons. In this work, we first delineate the parameter space where the above mentioned cascade decay of gauge KK particles dominates, and thereby can be the discovery mode at the LHC. We then perform a detailed analysis of the LHC signals from this model, finding that 300/fb suffices for evidence ofmore » KK-gluon in tri-jet, jet + di-photon and jet + di-boson channels. However, KK photon in photon + di-jet, and KK-W in leptonic W + di-jet require 3000/fb. The crucial feature of this decay chain is a “double” resonance, i.e. 3-particle and 2-particle invariant mass peaks, corresponding to the KK gauge boson and the radion respectively.« less
 [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [1]
  1. Univ. of Maryland, College Park, MD (United States). Maryland Center for Fundamental Physics. Dept. of Physics
  2. Univ. of Maryland, College Park, MD (United States). Maryland Center for Fundamental Physics. Dept. of Physics; Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Physics and Astronomy
  3. Univ. of Florida, Gainesville, FL (United States). Dept. of Physics; European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theory Division
Publication Date:
Grant/Contract Number:
SC0010296; PHY-1315155
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 5; Journal ID: ISSN 1029-8479
Springer Berlin
Research Org:
Univ. of Florida, Gainesville, FL (United States); Univ. of Maryland, College Park, MD (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF); Korean Research Foundation (KRF)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; phenomenological models; phenomenology of field theories in higher dimensions
OSTI Identifier: