Evidence for D0-D0 mixing.

We observe evidence for D(0)-D(0) mixing by measuring the difference in the apparent lifetime when a D(0) meson decays to the CP eigenstates K(+)K(-) and pi(+)pi(-) and when it decays to the final state K(-)pi(+). We find the relative difference of the lifetimes y(CP) to be [1.31+/-0.32(stat)+/-0.25(syst)]%, 3.2 standard deviations from zero. We also search for a CP asymmetry between D(0) and D(0) decays; no evidence for CP violation is found. These results are based on 540 fb(-1) of data recorded by the Belle detector at the KEKB e(+)e(-) collider.

T E Browder | M Bracko | J Brodzicka | R Chistov | Y Choi | A Drutskoy | J Haba | H Hayashii | M Hazumi | T Hokuue | H Kichimi | S K Kim | S Korpar | A Limosani | F Mandl | D Marlow | T Matsumoto | H Miyata | H Palka | M Rozanska | C Schwanda | K Senyo | F Takasaki | T Tsuboyama | Y Ushiroda | C H Wang | B D Yabsley | U Bitenc | I Bizjak | S Fratina | A Gorisek | S E Lee | T Lesiak | J Li | R Mizuk | H Nakazawa | Z Natkaniec | H Ozaki | R Pestotnik | H Shibuya | M Staric | S Villa | V Balagura | S McOnie | K Vervink | A Zupanc | P Krokovny | K Ueno | H Stoeck | S Bahinipati | K Sumisawa | I Adachi | H Aihara | T Aushev | A M Bakich | A Bondar | A Bozek | Y Chao | A Chen | K-F Chen | W T Chen | B G Cheon | J Dalseno | M Danilov | M Dash | S Eidelman | N Gabyshev | A Garmash | B Golob | T Hara | T Higuchi | Y Hoshi | W-S Hou | T Iijima | K Inami | A Ishikawa | H Ishino | R Itoh | M Iwasaki | Y Iwasaki | T Kawasaki | K Kinoshita | P Krizan | C C Kuo | A Kuzmin | Y-J Kwon | J S Lange | S-W Lin | A Matyja | W Mitaroff | K Miyabayashi | H Miyake | Y Nagasaka | E Nakano | S Nishida | O Nitoh | T Nozaki | S Ogawa | S Okuno | S L Olsen | Y Onuki | L E Piilonen | Y Sakai | M E Sevior | A Somov | S Stanic | T Sumiyoshi | S Suzuki | O Tajima | K Tamai | M Tanaka | Y Teramoto | X C Tian | K Trabelsi | T Tsukamoto | S Uehara | T Uglov | S Uno | P Urquijo | G Varner | K E Varvell | M-Z Wang | Q L Xie | A Yamaguchi | H Yamamoto | Y Yamashita | M Yamauchi | Z P Zhang | V Zhilich | T Aziz | K Belous | S Blyth | P Chang | S-K Choi | S Cole | H Ha | K Hayasaka | D Heffernan | Y J Kim | R Kumar | D Liventsev | Y Miyazaki | M Nakao | S Noguchi | P Pakhlov | O Schneider | R Seidl | M Shapkin | A Sokolov | Y Usov | Y Watanabe | E Won | C C Zhang | Y Yuan | J Schümann | A J Schwartz | S Y Suzuki | G N Taylor | A Bay | A Poluektov | J Dragic | D Epifanov | N C Hastings | P Kapusta | N Satoyama | B Shwartz | A Kibayashi | N Katayama | D Mohapatra | K Ikado | I Nakamura | Y Unno | K Abe | K Arinstein | E Barberio | I-S Cho | H Kaji | M J Lee | T Medvedeva | G Pakhlova | H Sahoo | C P Shen | I Tikhomirov | A Vinokurova | J Wicht | C Z Yuan | L M Zhang