Reconstruction and identification of boosted di-$\tau$ systems in a search for Higgs boson pairs using 13 TeV proton-proton collision data in ATLAS - INSPIRE

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Reconstruction and identification of boosted di- $\tau$ systems in a search for Higgs boson pairs using 13 TeV proton-proton collision data in ATLAS

ATLAS

Collaboration

Jul 29, 2020

47 pages

Published in:

JHEP 11 (2020) 163

Published: 2020

e-Print:

2007.14811 [hep-ex]

DOI:

10.1007/JHEP11(2020)163

PDG: Other Mass Limits

Report number:

CERN-EP-2020-118

Experiments:

CERN-LHC-ATLAS

View in:

reference search54 citations

Citations per year

Abstract: (Springer)

In this paper, a new technique for reconstructing and identifying hadronically decaying τ

^{+}

τ

^{−}

pairs with a large Lorentz boost, referred to as the di-τ tagger, is developed and used for the first time in the ATLAS experiment at the Large Hadron Collider. A benchmark di-τ tagging selection is employed in the search for resonant Higgs boson pair production, where one Higgs boson decays into a boosted

b\overline{b}

pair and the other into a boosted τ

^{+}

τ

^{−}

pair, with two hadronically decaying τ-leptons in the final state. Using 139 fb

^{−1}

of proton-proton collision data recorded at a centre-of-mass energy of 13 TeV, the efficiency of the di-τ tagger is determined and the background with quark- or gluon-initiated jets misidentified as di-τ objects is estimated. The search for a heavy, narrow, scalar resonance produced via gluon-gluon fusion and decaying into two Higgs bosons is carried out in the mass range 1–3 TeV using the same dataset. No deviations from the Standard Model predictions are observed, and 95% confidence-level exclusion limits are set on this model.[graphic not available: see fulltext]

Note:

46 pages in total, author list starting page 30, 13 figures, 3 tables, published in JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2019-22

Beyond Standard Model
Hadron-Hadron scattering (experiments)
Higgs physics
Tau Physics
p p: scattering
p p: colliding beams
resonance: production
Higgs particle: pair production
Higgs particle: leptonic decay
Higgs particle: hadronic decay

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