Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at
$$\sqrt{s} = 13\,\text {TeV} $$
s
=
13
TeV
Name
10052_2019_Article_6688.pdf
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1.18 MB
Format
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Checksum (MD5)
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Author(s)
Sirunyan, A. M
Tumasyan, A.
Adam, W.
Ambrogi, F.
Asilar, E.
Bergauer, T.
Brandstetter, J.
Dragicevic, M.
Erö, J.
Del Valle, A. E
Date Issued
March 2019
Journal
The European Physical Journal C
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2019 Mar 07;79(3):208
Sirunyan, A. M., A. Tumasyan, W. Adam, F. Ambrogi, E. Asilar, T. Bergauer, et al. “Search for a Heavy Resonance Decaying to a Top Quark and a Vector-Like Top Quark in the Lepton + Jets Final State in Pp Collisions at
$$\sqrt{s} = 13\,\text {TeV} $$
s
=
13
TeV.” The European Physical Journal C 79, no. 3 (March 2019). doi:10.1140/epjc/s10052-019-6688-5.
Version
Final published version
Abstract
Abstract
A search is presented for a heavy spin-1 resonance
$$\mathrm {Z}'$$
Z
′
decaying to a top quark and a vector-like top quark partner
$$\text {T} $$
T
in the lepton + jets final state. The search is performed using a data set of
$$\mathrm {p}$$
p
$$\mathrm {p}$$
p
collisions at a centre-of-mass energy of 13
$$\,\text {TeV}$$
TeV
corresponding to an integrated luminosity of
$$35.9{\,\text {fb}^{-1}} $$
35.9
fb
-
1
as recorded by the CMS experiment at the CERN LHC in the year 2016. The analysis is optimised for final states arising from the
$$\text {T} $$
T
decay modes to a top quark and a Higgs or
$$\mathrm {Z}$$
Z
boson (
$$\text {T} \rightarrow \mathrm {H} \mathrm {t}, \mathrm {Z} \mathrm {t}$$
T
→
H
t
,
Z
t
). The event selection makes use of resolved and merged top quark decay products, as well as decays of boosted Higgs bosons and
$$\mathrm {Z}$$
Z
and
$$\mathrm {W}$$
W
bosons using jet substructure techniques. No significant deviation from the standard model background expectation is observed. Exclusion limits on the product of the cross section and branching fraction for
$$\mathrm {Z}'\rightarrow \mathrm {t}\text {T}, \text {T} \rightarrow \mathrm {H} \mathrm {t}, \mathrm {Z} \mathrm {t}, \mathrm {W}\mathrm {b}$$
Z
′
→
t
T
,
T
→
H
t
,
Z
t
,
W
b
are presented for various combinations of the
$$\mathrm {Z}'$$
Z
′
resonance mass and the vector-like
$$\text {T} $$
T
quark mass. These results represent the most stringent limits to date for the decay mode
$$\mathrm {Z}'\rightarrow \mathrm {t}\text {T} \rightarrow \mathrm {t}\mathrm {H} \mathrm {t}$$
Z
′
→
t
T
→
t
H
t
. In a benchmark model with extra dimensions, invoking a heavy spin-1 resonance
$$\mathrm {G}^* $$
G
∗
, masses of the
$$\mathrm {G}^* $$
G
∗
between 1.5 and 2.3
$$\,\text {TeV}$$
TeV
and between 2.0 and 2.4
$$\,\text {TeV}$$
TeV
are excluded for
$$\text {T} $$
T
masses of 1.2 and 1.5
$$\,\text {TeV}$$
TeV
, respectively.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
An error occurred on the license name.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-019-6688-5
