Электронный каталог

Статья

Aad, G.
Improved Reconstruction of Highly Boosted *t-Lepton Pairs in the *t*t *> (*m*n&sub(*m)*n&sub(*t))(hadrons+*n&sub(*t)) Decay Channel with the ATLAS Detector / G.Aad, F.Ahmadov, I.N.Aleksandrov, V.A.Bednyakov, I.R.Boyko, G.Chelkov, A.Cheplakov, M.V.Chizhov, D.V.Dedovich, M.Demichev, A.R.Didenko, M.I.Gostkin, S.N.Karpov, Z.M.Karpova, U.Kruchonak, V.Kukhtin, Y.Kulchitsky, E.Ladygin, V.Lyubushkin, T.Lyubushkina, S.Malyukov, M.Mineev, E.Plotnikova, I.N.Potrap, N.A.Rusakovich, M.Shiyakova, A.Soloshenko, A.Tropina, P.V.Tsiareshka, T.Turtuvshin, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, [ATLAS Collab.]. – Text : electronic // The European Physical Journal C. – 2025. – Vol. 85, No. 6. – P. 706. – URL: https://doi.org/10.1140/epjc/s10052-025-14012-4. – Bibliogr.: 52.

This paper presents a new τ -lepton reconstruction and identification procedure at the ATLAS detector at the Large Hadron Collider, which leads to significantly improved performance in the case of physics processes where a highly boosted pair of τ -leptons is produced and one τ -lepton decays into a muon and two neutrinos (τ&sub(μ)), and the other decays into hadrons and one neutrino (τ&sub(had)). By removing the muon information from the signals used for reconstruction and identification of the τ&sub(had) candidate in the boosted pair, the efficiency is raised to the level expected for an isolated τ&sub(had). The new procedure is validated by selecting a sample of highly boosted Z → τ&sub(μ)τ&sub(had) candidates from the data sample of 140 fb−1 of proton–proton collisions at 13 TeV recorded with the ATLAS detector. Good agreement is found between data and simulation predictions in both the Z → τ&sub(μ)τ&sub(had) signal region and in a background validation region. The results presented in this paper demonstrate the effectiveness of the τ&sub(had) reconstruction with muon removal in enhancing the signal sensitivity of the boosted τ&sub(μ)τ&sub(had) channel at the ATLAS detector.



ОИЯИ = ОИЯИ (JINR)2025