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Aad, Georges
[VerfasserIn];
Baltes, Lisa Marie
[VerfasserIn];
Bartels, Falk
[VerfasserIn];
Castillo, Florencia Luciana
[VerfasserIn];
Czurylo, Marta
[VerfasserIn];
Dittmeier, Sebastian
[VerfasserIn];
Dunford, Monica
[VerfasserIn];
Franchino, Silvia
[VerfasserIn];
Klassen, Martin
[VerfasserIn];
Mkrtchyan, Tigran
[VerfasserIn];
Ott, Philipp
[VerfasserIn];
Rassloff, Damir Fabrice
[VerfasserIn];
Rodriguez Bosca, Sergi
[VerfasserIn];
Sauer, Christof
[VerfasserIn];
Schöning, André
[VerfasserIn];
Schultz-Coulon, Hans-Christian
[VerfasserIn];
Sothilingam, Varsiha
[VerfasserIn];
Stamen, Rainer
[VerfasserIn];
Starovoitov, Pavel
[VerfasserIn];
Vigani, Luigi
[VerfasserIn];
Weber, Sebastian
[VerfasserIn];
Wessels, Martin
[VerfasserIn];
Zinßer, Joachim
[VerfasserIn]
;
ATLAS Collaboration
Anomaly detection search for new resonances decaying into a Higgs boson and a generic new particle X in hadronic final states using √s=13 TeV pp collisions with the ATLAS detector
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- Medientyp: E-Artikel
- Titel: Anomaly detection search for new resonances decaying into a Higgs boson and a generic new particle X in hadronic final states using √s=13 TeV pp collisions with the ATLAS detector
- Beteiligte: Aad, Georges [VerfasserIn]; Baltes, Lisa Marie [VerfasserIn]; Bartels, Falk [VerfasserIn]; Castillo, Florencia Luciana [VerfasserIn]; Czurylo, Marta [VerfasserIn]; Dittmeier, Sebastian [VerfasserIn]; Dunford, Monica [VerfasserIn]; Franchino, Silvia [VerfasserIn]; Klassen, Martin [VerfasserIn]; Mkrtchyan, Tigran [VerfasserIn]; Ott, Philipp [VerfasserIn]; Rassloff, Damir Fabrice [VerfasserIn]; Rodriguez Bosca, Sergi [VerfasserIn]; Sauer, Christof [VerfasserIn]; Schöning, André [VerfasserIn]; Schultz-Coulon, Hans-Christian [VerfasserIn]; Sothilingam, Varsiha [VerfasserIn]; Stamen, Rainer [VerfasserIn]; Starovoitov, Pavel [VerfasserIn]; Vigani, Luigi [VerfasserIn]; Weber, Sebastian [VerfasserIn]; Wessels, Martin [VerfasserIn]; Zinßer, Joachim [VerfasserIn]
-
Erschienen:
1. September 2023
- Erschienen in: Physical review ; 108(2023), 5 vom: Sept., Artikel-ID 052009, Seite 1-33
- Sprache: Englisch
- DOI: 10.1103/PhysRevD.108.052009
- ISSN: 2470-0029
- Identifikator:
- Entstehung:
-
Anmerkungen:
Online veröffentlicht: 18. September 2023
*ATLAS Collaboration: G. Aad, L.M. Baltes, F. Bartels, F.L. Castillo, M.M. Czurylo, M. Dunford, S. Franchino, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser [und 2914 weitere Personen]
Im Titel steht der Buchstabe s unter dem Wurzelsymbol
- Beschreibung: A search is presented for a heavy resonance Y decaying into a Standard Model Higgs boson H and a new particle X in a fully hadronic final state. The full Large Hadron Collider run 2 dataset of proton-proton collisions at √s=13 TeV collected by the ATLAS detector from 2015 to 2018 is used and corresponds to an integrated luminosity of 139 fb−1. The search targets the high Y-mass region, where the H and X have a significant Lorentz boost in the laboratory frame. A novel application of anomaly detection is used to define a general signal region, where events are selected solely because of their incompatibility with a learned background-only model. It is constructed using a jet-level tagger for signal-model-independent selection of the boosted X particle, representing the first application of fully unsupervised machine learning to an ATLAS analysis. Two additional signal regions are implemented to target a benchmark X decay into two quarks, covering topologies where the X is reconstructed as either a single large-radius jet or two small-radius jets. The analysis selects Higgs boson decays into b¯b, and a dedicated neural-network-based tagger provides sensitivity to the boosted heavy-flavor topology. No significant excess of data over the expected background is observed, and the results are presented as upper limits on the production cross section σ(pp→Y→XH→q¯qb¯b) for signals with mY between 1.5 and 6 TeV and mX between 65 and 3000 GeV.
- Zugangsstatus: Freier Zugang