%O © 2007 The American Physical Society
%D 2007
%V 98
%N 18
%I AMERICAN PHYSICAL SOC
%L discovery1308545
%X Using 449x10(6) B(B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we observe clear signals for B+->(K) over bar K-0(+) and B-0 ->(K) over bar K-0(0) decays with 5.3 sigma and 6.0 sigma significance, respectively. We measure the branching fractions B(B+->(K) over bar K-0(+))=(1.22(-0.28-0.16)(+0.32+0.13))x10(-6) and B(B-0 ->(K) over bar K-0(0))=(0.87(-0.20)(+0.25)+/- 0.09)x10(-6), and partial-rate asymmetries A(CP)(B+->(K) over bar K-0(+))=0.13(-0.24)(+0.23)+/- 0.02 and A(CP)(B-0 ->(K) over bar K-0(0))=-0.58(-0.66)(+0.73)+/- 0.04. From a simultaneous fit, we also obtain B(B+-> K-0 pi(+))=(22.8(-0.7)(+0.8)+/- 1.3)x10(-6) and A(CP)(B+-> K-0 pi(+))=0.03 +/- 0.03 +/- 0.01. The first and second error in the branching fractions and the partial-rate asymmetries are statistical and systematic, respectively. No signal is observed for B-0 -> K+K- decays, and for this branching fraction, we set an upper limit of 4.1x10(-7) at the 90% confidence level.
%K INDUCED CP VIOLATION, BELLE, DETECTOR
%J PHYS REV LETT
%A SW Lin
%A P Chang
%A K Abe
%A K Abe
%A I Adachi
%A H Aihara
%A D Anipko
%A K Arinstein
%A V Aulchenko
%A T Aushev
%A T Aziz
%A AM Bakich
%A E Barberio
%A A Bay
%A I Bedny
%A K Belous
%A U Bitenc
%A I Bizjak
%A S Blyth
%A A Bondar
%A A Bozek
%A M Bracko
%A Y Chao
%A A Chen
%A KF Chen
%A WT Chen
%A BG Cheon
%A R Chistov
%A SK Choi
%A Y Choi
%A YK Choi
%A J Dalseno
%A M Dash
%A J Dragic
%A S Eidelman
%A S Fratina
%A N Gabyshev
%A T Gershon
%A A Go
%A G Gokhroo
%A B Golob
%A H Ha
%A J Haba
%A T Hara
%A K Hayasaka
%A H Hayashii
%A M Hazumi
%A D Heffernan
%A Y Hoshi
%A S Hou
%A WS Hou
%A YB Hsiung
%A T Iijima
%A K Ikado
%A A Imoto
%A K Inami
%A A Ishikawa
%A H Ishino
%A R Itoh
%A M Iwasaki
%A Y Iwasaki
%A H Kaji
%A JH Kang
%A N Katayama
%A H Kawai
%A T Kawasaki
%A HR Khan
%A H Kichimi
%A YJ Kim
%A K Kinoshita
%A S Korpar
%A P Krizan
%A R Kulasiri
%A CC Kuo
%A YJ Kwon
%A JS Lange
%A J Lee
%A MJ Lee
%A SE Lee
%A T Lesiak
%A A Limosani
%A F Mandl
%A T Matsumoto
%A S McOnie
%A W Mitaroff
%A K Miabayashi
%A H Miyaki
%A H Miyata
%A Y Miyazaki
%A R Mizuk
%A D Mohapatra
%A T Mori
%A I Nakamura
%A E Nakano
%A M Nakao
%A S Nishida
%A O Nitoh
%A S Noguchi
%A T Nozaki
%A S Ogawa
%A T Ohshima
%A S Okuno
%A SL Olsen
%A Y Onuki
%A H Ozaki
%A P Pakhlov
%A G Pakhlova
%A CW Park
%A H Park
%A KS Park
%A R Pestotnik
%A LE Piilonen
%A H Sahoo
%A Y Sakai
%A N Satoyama
%A T Schietinger
%A O Schneider
%A J Schumann
%A AJ Schwartz
%A K Senyo
%A M Shapkin
%A JB Singh
%A A Sokolov
%A A Somov
%A N Soni
%A S Stanic
%A M Staric
%A H Stoeck
%A T Sumiyoshi
%A O Tajima
%A F Takasaki
%A K Tamai
%A N Tamura
%A M Tanaka
%A GN Taylor
%A Y Teramoto
%A XC Tian
%A I Tikhomirov
%A K Trabelsi
%A T Tsukamoto
%A S Uehara
%A T Uglov
%A K Ueno
%A Y Unno
%A S Uno
%A Y Usov
%A G Varner
%A S Villa
%A CC Wang
%A CH Wang
%A MZ Wang
%A Y Watanabe
%A E Won
%A QL Xie
%A BD Yabsley
%A A Yamaguchi
%A Y Yamashita
%A M Yamauchi
%A CC Zhang
%A LM Zhang
%A ZP Zhang
%A V Zhilich
%A A Zupanc
%T Observation of B decays to two kaons