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Title: Top partners and Higgs boson production

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Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 90; Journal Issue: 3; Journal ID: ISSN 1550-7998
American Physical Society
Country of Publication:
United States

Citation Formats

Chen, Chien-Yi, Dawson, S., and Lewis, I. M. Top partners and Higgs boson production. United States: N. p., 2014. Web. doi:10.1103/PhysRevD.90.035016.
Chen, Chien-Yi, Dawson, S., & Lewis, I. M. Top partners and Higgs boson production. United States. doi:10.1103/PhysRevD.90.035016.
Chen, Chien-Yi, Dawson, S., and Lewis, I. M. Mon . "Top partners and Higgs boson production". United States. doi:10.1103/PhysRevD.90.035016.
title = {Top partners and Higgs boson production},
author = {Chen, Chien-Yi and Dawson, S. and Lewis, I. M.},
abstractNote = {},
doi = {10.1103/PhysRevD.90.035016},
journal = {Physical Review D},
number = 3,
volume = 90,
place = {United States},
year = {Mon Aug 18 00:00:00 EDT 2014},
month = {Mon Aug 18 00:00:00 EDT 2014}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.90.035016

Citation Metrics:
Cited by: 25works
Citation information provided by
Web of Science

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  • Top partners--vectorlike quarks which mix predominantly with the top quark, are simple extensions of the standard model present in many theories of new physics such as little Higgs models, topcolor models, and extra dimensions. Through renormalizable mixing with the top quark, these top partners inherit couplings to the Higgs boson. Higgs bosons produced from the decay of top partners are often highly boosted and ideal candidates for analyses based on jet substructure. Using substructure methods, we show that light Higgs bosons decaying to bb can be discovered at the 14 TeV LHC with less than 10 fb{sup -1} for top-partnermore » masses up to 1 TeV.« less
  • Cited by 26
  • Theories of physics beyond the Standard Model that address the hierarchy problem generally involve top partners, new particles that cancel the quadratic divergences associated with the Yukawa coupling of the Higgs to the top quark. With extensions of the Standard Model that involve new colored particles coming under strain from collider searches, scenarios in which the top partners carry no charge under the strong interactions have become increasingly compelling. Although elusive for direct searches, these theories predict modified couplings of the Higgs boson to the Standard Model particles. This results in corrections to the Higgs production and decay rates that can be detected at the Large Hadron Collider (LHC) provided the top partners are sufficiently light, and the theory correspondingly natural. In this paper we consider three theories that address the little hierarchy problem and involve colorless top partners, specifically the Mirror Twin Higgs, Folded Supersymmetry, and the Quirky Little Higgs. For each model we investigate the current and future bounds on the top partners, and the corresponding limits on naturalness, that can be obtained from the Higgs program at the LHC. Here, we conclude that the LHC will not be able to strongly disfavor naturalness, with mild tuning at the level of about one part in ten remaining allowed even with 3000 fbmore » $$^{-1}$$ of data at 14 TeV.« less
  • Relevant to {ital WW} physics and heavy-Higgs-boson detection through its decay {ital H}{r arrow}{ital W}{sup +}{ital W}{sup {minus}}{r arrow}{ital l}{nu}+2 jets at the Superconducting Super Collider is the subprocess {ital bg}{r arrow}{ital Wt}. We study this process over the invariant-mass region {ital M}{sub {ital W}{ital t}}{gt}850 with respect to a 1-TeV Higgs boson using top-quark masses of {ital m}{sub {ital t}}=100 and 175 GeV. The cross sections in this region give a signal-to-background ratio of about 1:20. After applying further restrictions at the hadronic level for eliminating top quarks in conjunction with some basic parton level cuts, we find thismore » ratio can be improved to 1:1. Polarization properties are also discussed.« less
  • A systematic analysis of the like-sign dilepton signature for gluino production at the CERN LHC is performed in the {ital R}-conserving minimal supersymmetric standard model, taking into account the top quark and Higgs boson effects in the cascade decay. We consider two representative values of the gluino mass, 300 and 800 GeV, along with those of the other SUSY parameters. While the top quark contribution is kinematically suppressed for the former case, it is very important for the latter. Ways of separating the signal from the background are discussed. One expects a viable like-sign dilepton signal up to a gluinomore » mass of {similar_to}800 (1200) GeV at the low (high) luminosity option of the LHC over practically the full parameter space of the MSSM.« less