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Title: Strong tW scattering at the LHC

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3];  [4]
  1. Cornell Univ., Ithaca, NY (United States)
  2. Cornell Univ., Ithaca, NY (United States); Rutgers Univ., Piscataway, NJ (United States)
  3. Univ. of California, Davis, CA (United States)
  4. Univ. di Padova and INFN, Padova (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland)

Deviations of the top electroweak couplings from their Standard Model values imply that certain amplitudes for the scattering of third generation fermions and longitudinally polarized vector bosons or Higgses diverge quadratically with momenta. This high-energy growth is a genuine signal of models where the top quark is strongly coupled to the sector responsible for electroweak symmetry breaking. We propose to profit from the high energies accessible at the LHC to enhance the sensitivity to non-standard top-Z couplings, which are currently very weakly constrained. To demonstrate the effectiveness of the approach, we perform a detailed analysis of tW → tW scattering, which can be probed at the LHC via pp→$$t\bar{t}$$Wj. By recasting a CMS analysis at 8 TeV, we derive the strongest direct bounds to date on the Ztt couplings. We also design a dedicated search at 13 TeV that exploits the distinctive features of the $$t\bar{t}$$Wj signal. Lastly, we present other scattering processes in the same class that could provide further tests of the top-Higgs sector.

Research Organization:
Rutgers Univ., Piscataway, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0003883
OSTI ID:
1327317
Journal Information:
Journal of High Energy Physics (Online), Vol. 2016, Issue 1; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

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Cited By (10)

Combinations of single-top-quark production cross-section measurements and |fLVVtb| determinations at s $$ \sqrt{s} $$ = 7 and 8 TeV with the ATLAS and CMS experiments journal May 2019
Top-quark electroweak interactions at high energy journal October 2019
Diboson at the LHC vs LEP text January 2018
Resolving gluon fusion loops at current and future hadron colliders text January 2016
On the Validity of the Effective Field Theory Approach to SM Precision Tests text January 2016
Resolving gluon fusion loops at current and future hadron colliders text January 2016
Effective Field Theory in the top sector: do multijets help? text January 2018
New Physics from High Energy Tops text January 2018
Top-quark electroweak interactions at high energy text January 2019
Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections text January 2019

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