E-resources
Peer reviewed
Open access
-
Aloisio, A.; Atmacan, H.; Bae, H.; Banerjee, Sw; Baudot, J.; Bauer, M.; Becker, J.; Bobrov, A.; Bolz, A.; Bozek, A.; Briere, R. A.; Cecchi, C.; Cheaib, R.; Chen, Y. -T.; Chirapatpimol, K.; Cho, S. -J.; Cinabro, D.; Corona, L.; Dattola, F.; de Sangro, R.; Dhamija, R.; Dossett, D.; Ecker, P.; Ferlewicz, D.; Fillinger, T.; Forti, F.; Fulsom, B. G.; Giri, A.; Goldenzweig, P.; Graziani, E.; Gudkova, K.; Guilliams, J.; Hara, T.; Hayashii, H.; Hsu, C. -L.; Iwasaki, M.; Jaffe, D. E.; Ji, Q. P.; Kawasaki, T.; Kim, K. -H.; Kim, Y. -K.; Kodyš, P.; Kojima, K.; Konno, T.; Kovalenko, E.; Kumar, M.; Kumara, K.; Kwon, Y. -J.; Lanceri, L.; Leitl, P.; Li, C.; Li, S. X.; Lieret, K.; Liu, Q. Y.; Longo, S.; Maiti, R.; Martini, A.; Massaccesi, L.; Masuda, M.; Miller, C.; Miyabayashi, K.; Mohanty, G. B.; Moser, H. -G.; Mueller, F.; Ogawa, S.; Oskin, P.; Pakhlova, G.; Pathak, A.; Patra, S.; Peschke, R.; Pham, F.; Pinna Angioni, G.; Ripp-Baudot, I.; Rozanska, M.; Sato, Y.; Schwartz, A. J.; Seino, Y.; Sfienti, C.; Shiu, J. -G.; Singh, J. B.; Sobie, R. J.; Stefkova, S.; Takahashi, M.; Takizawa, M.; Tanaka, S.; Uehara, S.; Ushiroda, Y.; Varner, G. S.; Vinokurova, A.; Vobbilisetti, V.; Waheed, E.; Wang, E.; Wang, M. -Z.; Wessel, C.; Windel, H.; Xu, X. P.; Yabsley, B. D.; Yuan, C. Z.; Yusa, Y.; Zani, L.
Physical review. D, 04/2023, Volume: 107, Issue: 7Journal Article
We present measurements of the first to fourth moments of the lepton mass squared $q$2 of $B$ → $X_cℓ\overline{ν}_ℓ$ decays for $ℓ = e, μ$ and with $X_c$ 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 $X_c$ system and reconstruct $q$2, one of the $B$ mesons from an $Υ$($4S$) → $B\overline{B}$ decay is fully reconstructed in a hadronic decay mode using a multivariate $B$ tagging algorithm. We report raw and central moments for $q$2 > 1.5 $GeV$2=$c$4 up to $q$2 > 8.5 $GeV$2=$c$4, probing up to 77% of the accessible $B$ → $X_cℓ\overline{ν}_ℓ$ phase space. This is the first measurement of moments in the experimentally challenging range of 1.5; 2.5 $GeV$2=$c$4. The results can be used for a new determination of |$V_{cb}$| using inclusive $B$ → $X_cℓ\overline{ν}_ℓ$ decays.
