Details

Autor(en) / Beteiligte

• Abudinén, F.
• Aihara, H.
• Aloisio, A.
• Baehr, S.
• Bertemes, M.
• Biswas, D.
• Browder, T. E.
• Chen, C.
• Chen, Y.-T.
• Cheon, B. G.
• De Nuccio, M.
• De Pietro, G.
• de Sangro, R.
• Destefanis, M.
• Di Canto, A.
• Dort, K.
• Dubey, S.
• Eliachevitch, M.
• Epifanov, D.
• Ferber, T.
• Ferlewicz, D.
• Finocchiaro, G.
• Forti, F.
• Fulsom, B. G.
• Ganiev, E.
• Garmash, A.
• Gaz, A.
• Gellrich, A.
• Golob, B.
• Grace, P.
• Guan, Y.
• Hadjivasiliou, C.
• Hearty, C.
• Hernández Villanueva, M.
• Hill, E. C.
• Itoh, R.
• Iwasaki, Y.
• Jaffe, D. E.
• Kohani, S.
• Križan, P.
• Krokovny, P.
• Kumar, J.
• Kumar, M.
• Kuzmin, A.
• Lacaprara, S.
• Laurenza, M.
• Le Diberder, F. R.
• Lee, S. C.
• Libby, J.
• Longo, S.
• Marcello, S.
• Matsuda, T.
• Matvienko, D.
• Müller, F. J.
• Nakamura, K. R.
• Nazaryan, G.
• Niebuhr, C.
• Nishimura, K.
• Pakhlov, P.
• Pardi, S.
• Park, S.-H.
• Paschen, B.
• Pathak, A.
• Patra, S.
• Paul, S.
• Pedlar, T. K.
• Piilonen, L. E.
• Rados, P.
• Ripp-Baudot, I.
• Rizzuto, L. B.
• Robertson, S. H.
• Roney, J. M.
• Santelj, L.
• Sato, Y.
• Sobie, R. J.
• Sokolov, A.
• Sumisawa, K.
• Sutcliffe, W.
• Svidras, H.
• Tabata, M.
• Tamponi, U.
• Tanida, K.
• Tenchini, F.
• Tonelli, D.
• Trabelsi, K.
• Uno, K.
• Uno, S.
• Ushiroda, Y.
• Vahsen, S. E.
• van Tonder, R.
• Vitale, L.
• Wach, B.
• Wakeling, H. M.
• Wang, M.-Z.
• Warburton, A.
• Watanuki, S.
• Wessel, C.
• Yuan, C. Z.
• Zhou, X. Y.
• Zhukova, V. I.

Titel

Search for B + → K + ν ν ¯ Decays Using an Inclusive Tagging Method at Belle II

Ist Teil von

• Physical review letters, 2021-10, Vol.127 (18), Article 181802

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2021

Link zum Volltext

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• A search for the flavor-changing neutral-current decay B+ →K+$ν\bar{ν}$ is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63 fb-1 collected at the Υ (4S) resonance and a sample of 9 fb-1 collected at an energy 60 MeV below the resonance. Because the measurable decay signature involves only a single charged kaon, a novel measurement approach is used that exploits not only the properties of the B+ →K+$ν\bar{ν}$ decay, but also the inclusive properties of the other B meson in the Υ(4S) $B\bar{B}$ event, to suppress the background from other B meson decays and light-quark pair production. This inclusive tagging approach offers a higher signal efficiency compared to previous searches. No significant signal is observed. An upper limit on the branching fraction of B+ →K+$ν\bar{ν}$ of 4.1 × 10-5 is set at the 90% confidence level.