Search for B -> phi pi decays
hep-ex
/ Authors
Belle collaboration, J. H. Kim, M. Nakao, I. Adachi, K. Adamczyk, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich
and 142 more authors
K. Belous, B. Bhuyan, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. -C. Chang, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. -S. Cho, K. Cho, Y. Choi, J. Dalseno, J. Dingfelder, Z. Doležal, Z. Drásal, D. Dutta, S. Eidelman
/ Abstract
We report on a search for the charmless decays $B^{+} \toφπ^{+}$ and $B^{0} \toφπ^{0}$ that are strongly suppressed in the Standard Model. The analysis is based on a data sample of $657 \times 10^6$ $B \bar{B}$ pairs collected at the $Υ(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We find no significant signal and set upper limits of $3.3 \times 10^{-7}$ for $B^{+} \to φπ^{+}$ and $1.5 \times 10^{-7}$ for $B^0 \to φπ^0$ at the 90% confidence level.