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Search for boosted diphoton resonances in the 10 to 70 GeV mass range using 138 fb.sup.−1./sup. of 13 TeV pp collisions with the ATLAS detector

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    0577198 - FZÚ 2024 RIV DE eng J - Journal Article
    Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2907 authors
    Search for boosted diphoton resonances in the 10 to 70 GeV mass range using 138 fb−1 of 13 TeV pp collisions with the ATLAS detector.
    Journal of High Energy Physics. Roč. 2023, č. 7 (2023), č. článku 155. ISSN 1029-8479. E-ISSN 1029-8479
    Research Infrastructure: CERN-CZ III - 90240
    Institutional support: RVO:68378271
    Keywords : photon: pair production * boosted particle * CERN LHC Coll * ATLAS
    OECD category: Particles and field physics
    Impact factor: 5.4, year: 2022
    Method of publishing: Open access

    A search for diphoton resonances in the mass range between 10 and 70 GeV with the ATLAS experiment at the Large Hadron Collider (LHC) is presented. The analysis is based on pp collision data corresponding to an integrated luminosity of 138 fb−1−1 at a centre-of-mass energy of 13 TeV recorded from 2015 to 2018. Previous searches for diphoton resonances at the LHC have explored masses down to 65 GeV, finding no evidence of new particles. This search exploits the particular kinematics of events with pairs of closely spaced photons reconstructed in the detector, allowing examination of invariant masses down to 10 GeV. The presented strategy covers a region previously unexplored at hadron colliders because of the experimental challenges of recording low-energy photons and estimating the backgrounds.
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