Search for Anomalous $t\bar{t}$ Production in the Highly-Boosted All-Hadronic Final State - INSPIRE

DataBETA

Search for Anomalous $t\bar{t}$ Production in the Highly-Boosted All-Hadronic Final State

CMS

Collaboration

Apr, 2012

39 pages

Published in:

JHEP 09 (2012) 029,
JHEP 03 (2014) 132 (erratum)

Published: Sep 11, 2012

e-Print:

1204.2488 [hep-ex]

DOI:

PDG: Limits for other

{{\mathit Z}^{\,'}}

Report number:

CMS-EXO-11-006,
CERN-PH-EP-2012-077

Experiments:

CERN-LHC-CMS

View in:

reference search174 citations

Citations per year

Abstract: (arXiv)

A search is presented for a massive particle, generically referred to as a Z', decaying into a t t-bar pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 inverse femtobarns. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall--Sundrum Kaluza--Klein gluon. In addition, the results constrain any enhancement in t t-bar production beyond expectations of the standard model for t t-bar invariant masses larger than 1 TeV.

top: pair production
postulated particle: massive
p p: scattering
channel cross section: branching ratio
channel cross section: enhancement
background
topcolor
gluon: Kaluza-Klein
new particle: search for
Z': hadronic decay

References(59)

Figures(11)

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