Search for Proton Decay via $p \rightarrow \nu K^{+}$ using 260   kiloton$\cdot$year data of Super-Kamiokande
  We have searched for proton decay via $p \rightarrow \nu K^{+}$ using Super-Kamiokande data from April 1996 to February 2013, 260 kiloton$\cdot$year exposure in total. No evidence for this proton decay mode is found. A lower limit of the proton lifetime is set to $5.9 \times 10^{33}$ years at 90% confidence level. 
The Super-Kamiokande Collaboration: K. Abe, Y. Hayato, K. Iyogi, J.   Kameda, M. Miura, S. Moriyama, M. Nakahata, S. Nakayam...
hep-ex