Evidence for the decay B0-&gt;eta pi^0
Creators: name: Belle Collaboration
name: Pal, B.
name: Schwartz, A. J.
name: Abdesselam, A.
name: Adachi, I.
name: Aihara, H.
name: Said, S. Al
name: Arinstein, K.
name: Asner, D. M.
name: Aulchenko, V.
name: Aushev, T.
name: Ayad, R.
name: Babu, V.
name: Badhrees, I.
name: Bakich, A. M.
name: Bobrov, A.
name: Bonvicini, G.
name: Bozek, A.
name: Bračko, M.
name: Browder, T. E.
name: Červenkov, D.
name: Chang, M. -C.
name: Chekelian, V.
name: Chen, A.
name: Cheon, B. G.
name: Cho, K.
name: Chobanova, V.
name: Choi, Y.
name: Cinabro, D.
name: Dalseno, J.
name: Doležal, Z.
name: Drásal, Z.
name: Drutskoy, A.
name: Dutta, D.
name: Eidelman, S.
name: Farhat, H.
name: Fast, J. E.
name: Ferber, T.
name: Frost, O.
name: Fulsom, B. G.
name: Gaur, V.
name: Gabyshev, N.
name: Ganguly, S.
name: Garmash, A .
name: Getzkow, D.
name: Gillard, R.
name: Glattauer, R.
name: Goh, Y. M.
name: Golob, B.
name: Grzymkowska, O.
name: Hara, T.
name: Hayasaka, K.
name: Hayashii, H.
name: He, X. H.
name: Hou, W. -S.
name: Huschle, M.
name: Hyun, H. J.
name: Iijima, T.
name: Ishikawa, A.
name: Itoh, R.
name: Iwasaki, Y.
name: Jaegle, I.
name: Julius, T.
name: Kang, K. H.
name: Kato, E.
name: Kiesling, C.
name: Kim, D. Y.
name: Kim, J. B.
name: Kim, J. H.
name: Kim, K. T.
name: Kim, M. J.
name: Kim, S. H.
name: Kim, Y. J.
name: Kinoshita, K.
name: Ko, B. R.
name: Kodyš, P.
name: Korpar, S.
name: Križan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kumita, T.
name: Kuzmin, A.
name: Kwon, Y. -J.
name: Lange, J. S.
name: Lee, D. H.
name: Lee, I. S.
name: Li, Y.
name: Gioi, L. Li
name: Libby, J.
name: Liventsev, D.
name: Lukin, P.
name: Matvienko, D.
name: Miyata, H.
name: Mohanty, G. B.
name: Moll, A.
name: Moon, H. K.
name: Nakamura, K. R.
name: Nakano, E.
name: Nakao, M.
name: Nanut, T.
name: Natkaniec, Z.
name: Nayak, M.
name: Nishida, S.
name: Ogawa, S.
name: Okuno, S.
name: Pakhlov, P.
name: Pakhlova, G.
name: Park, C. W.
name: Park, H.
name: Pedlar, T. K.
name: Pesántez, L.
name: Petrič, M.
name: Piilonen, L. E.
name: Pulvermacher, C.
name: Ribežl, E.
name: Ritter, M.
name: Rostomyan, A.
name: Ryu, S.
name: Sakai, Y.
name: Sandilya, S.
name: Santel, D.
name: Santelj, L.
name: Sanuki, T.
name: Sato, Y.
name: Schneider, O.
name: Schnell, G.
name: Schwanda, C.
name: Senyo, K.
name: eon, O. S
name: Sevior, M. E.
name: Shapkin, M.
name: Shebalin, V.
name: Shen, C. P.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Sibidanov, A.
name: Simon, F.
name: Sohn, Y. -S.
name: Solovieva, E.
name: Stanič, S.
name: Starič, M.
name: mihama, M. Su
name: Sumisawa, K.
name: Sumiyoshi, T.
name: Tamponi, U.
name: Teramoto, Y.
name: Thorne, F.
name: Uchida, M.
name: Uehara, S.
name: Unno, Y.
name: Uno, S.
name: Usov, Y.
name: Van Hulse, C.
name: Vanhoefer, P.
name: Varner, G.
name: ova, A. Vinokur
name: Vorobyev, V.
name: Vossen, A.
name: Wagner, M. N.
name: Wang, C. H.
name: Wang, M. -Z.
name: Wang, P.
name: Wang, X. L.
name: Watanabe, Y.
name: Won, E.
name: Yamamoto, H.
name: Yamaoka, J.
name: Yashchenko, S.
name: Zhang, Z. P.
name: lich, V. Zhi
name: Zhulanov, V.
name: Zupanc, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report a search for the charmless hadronic decay $B^0\toηπ^0$ with a data sample corresponding to an integrated luminosity of 694 $\rm fb^{-1}$ containing $753\times10^6$ $B\bar{B}$ pairs. The data were collected by the Belle experiment running on the $Υ(4S)$ resonance at the KEKB $e^+e^-$ collider. We measure a branching fraction $\mathcal{B}(B^0\toηπ^0)=(4.1^{+1.7+0.5}_{-1.5-0.7})\times 10^{-7}$, where the first uncertainty is statistical and the second is systematic. Our measurement gives an upper limit of $\mathcal{B}(B^0\toηπ^0)&lt;6.5\times 10^{-7}$ at 90\% confidence level. The signal has a significance of $3.0$ standard deviations and constitutes the first evidence for this decay mode.
description: 11 pages, 3 figures, 2 tables, submitted to Physical Review D(R)