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Adachi, I.; Aggarwal, L.; Aloisio, A.; Anh Ky, N.; Bambade, P.; Baudot, J.; Bauer, M.; Bessner, M.; Bilka, T.; Bodrov, D.; Bolz, A.; Casarosa, G.; Chang, M.-C.; Cheema, P.; Chilikin, K.; Chirapatpimol, K.; Choudhury, S.; Cochran, J.; Dorigo, M.; Dort, K.; Dujany, G.; Ecker, P.; Ferlewicz, D.; Fodor, A.; Garcia-Hernandez, M.; Ghosh, D.; Giordano, R.; Glazov, A.; Gogota, O.; Goldenzweig, P.; Gradl, W.; Greenwald, D.; Gruberová, Z.; Han, Y.; Hazra, S.; Hearty, C.; Hill, E. C.; Hohmann, M.; Ipsita, N.; Ito, S.; Iwasaki, M.; Jang, E.-J.; Ketter, C.; Kim, C.-H.; Kodyš, P.; Kohani, S.; Kunigo, T.; Kuzmin, A.; Kwon, Y.-J.; Lam, T.; Lanceri, L.; Lange, J. S.; Laurenza, M.; Leboucher, R.; Li, Y.; Libby, J.; Liventsev, D.; Maiti, R.; Martini, A.; Massaccesi, L.; Masuda, M.; Maurya, S. K.; Mondal, S.; Moneta, S.; Nishida, S.; Onuki, Y.; Parham, K.; Passeri, A.; Pedlar, T. K.; Peschke, R.; Reif, M.; Remnev, M.; Ripp-Baudot, I.; Roehrken, M.; Sandilya, S.; Santelj, L.; Savinov, V.; Scavino, B.; Schmitt, C.; Senyo, K.; Sfienti, C.; Sharma, C.; Shwartz, B.; Sibidanov, A.; Sobie, R. J.; Spruck, B.; Takizawa, M.; Tenchini, F.; Tittel, O.; van Tonder, R.; Varvell, K. E.; Vitale, L.; Wach, B.; Wakai, M.; Wang, E.; Wang, M.-Z.; Wang, Z.; Wessel, C.; Yang, S. B.; Zhou, J. S.
Physical review. D, 08/2023, Letnik: 108, Številka: 3Journal Article
We present a measurement of the τ-lepton mass using a sample of about 175 million $e^+$$e^-$ → ${{\tau}}^+{{\tau}}^-$ events collected with the Belle II detector at the SuperKEKB $e^+$$e^-$ collider at a center-of-mass energy of 10.579GeV. This sample corresponds to an integrated luminosity of $190$ $\mathrm{fb}$$^{-1}$. We use the kinematic edge of the ${{\tau}}$ pseudomass distribution in the decay ${{\tau}}^-$ → $π^-π^+π^-ν_τ$ and measure the ${{\tau}}$ mass to be $1777.09±0.08±0.11$ $\mathrm{MeV}$ $/{c^2}$, where the first uncertainty is statistical and the second systematic. This result is the most precise to date.
