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S.Stroili, R.Sumihama, M.Sumisawa, K.Sutcliffe, W.Suzuki, S. Y.Svidras, H.Tabata, M.Takahashi, M.Takizawa, M.Tamponi, U.Tanaka, S.Tanida, K.Tanigawa, H.Taniguchi, N.Tenchini, F.Tiwary, R.Tonelli, D.Torassa, E.Toutounji, N.Trabelsi, K.Uchida, M.Ueda, I.Uehara, S.Uglov, T.Unger, K.Unno, Y.Uno, K.Uno, S.Ushiroda, Y.Vahsen, S. E.van Tonder, R.Varner, G. S.Varvell, K. E.Vinokurova, A.Vitale, L.Vobbilisetti, V.Vossen, A.Waheed, E.Wakeling, H. M.Wang, E.Wang, M. -Z.Wang, X. L.Warburton, A.Watanabe, M.Watanuki, S.Welsch, M.Wessel, C.Windel, H.Won, E.Xu, X. P.Yabsley, B. D.Yamada, S.Yan, W.Yang, S. B.Ye, H.Yin, J. H.Yook, Y. M.Yoshihara, K.Yuan, C. Z.Yusa, Y.Zani, L.Zhai, Y.Zhang, Y.Zhilich, V.Zhou, Q. D.Zhou, X. Y.Zhukova, V. I.Zlebcik, R.2023-12-082023-12-082023-04-052023-04-052470-0010https://hdl.handle.net/10919/117127We present measurements of the first to fourth moments of the lepton mass squared q2 of B→Xcℓν¯ℓ decays for ℓ=e, μ and with Xc a hadronic system containing a charm quark. These results use a sample of electron-positron collisions at the ϒ(4S) resonance corresponding to 62.8 fb-1 of integrated luminosity and collected by the Belle II 2 experiment in 2019 and 2020. To identify the Xc system and reconstruct q2, one of the B mesons from an ϒ(4S)→BB¯ decay is fully reconstructed in a hadronic decay mode using a multivariate B tagging algorithm. We report raw and central moments for q2>1.5 GeV2/c4 up to q2>8.5 GeV2/c4, probing up to 77% of the accessible B→Xcℓν¯ℓ phase space. This is the first measurement of moments in the experimentally challenging range of [1.5,2.5] GeV2/c4. The results can be used for a new determination of |Vcb| using inclusive B→Xcℓν¯ℓ decays.24 page(s)In CopyrightScience & TechnologyPhysical SciencesAstronomy & AstrophysicsPhysics, Particles & FieldsPhysicsCB-VERTICAL-BARMONTE-CARLOHEAVY(B)OVER-BARFORMQCD5106 Nuclear and Plasma Physics5107 Particle and High Energy Physics4902 Mathematical Physics49 Mathematical Sciences51 Physical SciencesArticle - Refereedhttps://doi.org/10.1103/PhysRevD.107.0720021077Piilonen, Leo [0000-0001-6836-0748]2470-0029