Details

Autor(en) / Beteiligte

• Yusa, Y.
• Al Said, S.
• Atmacan, H.
• Aulchenko, V.
• Ayad, R.
• Bahinipati, S.
• Bakich, A. M.
• Behera, P.
• Bhardwaj, V.
• Bhuyan, B.
• Biswal, J.
• Bračko, M.
• Browder, T. E.
• Cao, L.
• Cheon, B. G.
• Chilikin, K.
• Choi, S.-K.
• Choi, Y.
• Cunliffe, S.
• Dash, N.
• Di Carlo, S.
• Dong, T. V.
• Epifanov, D.
• Fast, J. E.
• Gaur, V.
• Garmash, A.
• Giri, A.
• Hayasaka, K.
• Hirose, S.
• Inami, K.
• Itoh, R.
• Iwasaki, M.
• Jia, S.
• Joo, K. K.
• Kang, K. H.
• Kawasaki, T.
• Kiesling, C.
• Kim, J. B.
• Kotchetkov, D.
• Križan, P.
• Kroeger, R.
• Kuhr, T.
• Kumar, R.
• Kwon, Y.-J.
• Lange, J. S.
• Lee, I. S.
• Lee, S. C.
• Li, L. K.
• Li, Y. B.
• Libby, J.
• Liventsev, D.
• Luo, T.
• Masuda, M.
• Matsuda, T.
• Miyabayashi, K.
• Mizuk, R.
• Mohanty, G. B.
• Moon, H. K.
• Nakano, E.
• Nakao, M.
• Nanut, T.
• Natkaniec, Z.
• Nishida, S.
• Nishimura, K.
• Ogawa, S.
• Pardi, S.
• Park, H.
• Pedlar, T. K.
• Piilonen, L. E.
• Popov, V.
• Prencipe, E.
• Russo, G.
• Sakai, Y.
• Sandilya, S.
• Sanuki, T.
• Savinov, V.
• Schneider, O.
• Schnell, G.
• Schwartz, A. J.
• Seino, Y.
• Senyo, K.
• Seon, O.
• Shen, C. P.
• Shiu, J.-G.
• Starič, M.
• Sumiyoshi, T.
• Tamponi, U.
• Unno, Y.
• Uno, S.
• Usov, Y.
• Van Hulse, C.
• Varner, G.
• Vorobyev, V.
• Waheed, E.
• Wang, B.
• Wang, M.-Z.
• Won, E.
• Ye, H.
• Zhilich, V.
• Zhulanov, V.

Titel

Measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays

Ort / Verlag

Deutsches Elektronen-Synchrotron, DESY, Hamburg

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We report a measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays using a data sample of $772 \times 10^6$ $B\bar{B}$ pairs collected by the Belle experiment runnin g at the $\Upsilon (4S)$ resonance at the KEKB $e^+ e^-$ collider. This decay proceeds mainly via a $b\to sd\bar{d}$ 'penguin' amplitude. The results are $\sin 2\phi^{\rm eff}_1 = 0.92^{+0.27}_{-0.31}~$ (stat.) $\pm 0.11$ (syst.) and $\mathcal{A} = 0.28 \pm 0.21$ (stat.) $\pm 0.04$ (syst.), which are the most precise measurements of $CP$ violati on in this decay mode to date. The value for the $CP$-violating parameter $\sin 2\phi^{\rm eff}_1$ is consistent with that obtained using decay modes proceeding via a $b\to c\bar{c}s$ 'tree' amplitude.