Observation of B decays to two kaons
Using 449x10(6) BB[over ] pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we observe clear signals for B(+)-->K[over ](0)K(+) and B(0)-->K[over ](0)K(0) decays with 5.3sigma and 6.0sigma significance, respectively. We measure the branching fractions B(B...
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| Veröffentlicht in: | Physical review letters 2007-05, Vol.98 (18), p.181804-181804, Article 181804 |
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| creator | Lin, S-W Chang, P Abe, K Adachi, I Aihara, H Anipko, D Arinstein, K Aulchenko, V Aushev, T Aziz, T Bakich, A M Barberio, E Bay, A Bedny, I Belous, K Bitenc, U Bizjak, I Blyth, S Bondar, A Bozek, A Bracko, M Chao, Y Chen, A Chen, K-F Chen, W T Cheon, B G Chistov, R Choi, S-K Choi, Y Choi, Y K Dalseno, J Dash, M Dragic, J Eidelman, S Fratina, S Gabyshev, N Gershon, T Go, A Gokhroo, G Golob, B Ha, H Haba, J Hara, T Hayasaka, K Hayashii, H Hazumi, M Heffernan, D Hoshi, Y Hou, S Hou, W-S Hsiung, Y B Iijima, T Ikado, K Imoto, A Inami, K Ishikawa, A Ishino, H Itoh, R Iwasaki, M Iwasaki, Y Kaji, H Kang, J H Katayama, N Kawai, H Kawasaki, T Khan, H R Kichimi, H Kim, Y J Kinoshita, K Korpar, S Krizan, P Kulasiri, R Kuo, C C Kwon, Y-J Lange, J S Lee, J Lee, M J Lee, S E Lesiak, T Limosani, A Mandl, F Matsumoto, T McOnie, S Mitaroff, W Miyabayashi, K Miyake, H Miyata, H Miyazaki, Y Mizuk, R Mohapatra, D Mori, T Nakamura, I Nakano, E Nakao, M Nishida, S Nitoh, O Noguchi, S Nozaki, T Ogawa, S |
| description | Using 449x10(6) BB[over ] pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we observe clear signals for B(+)-->K[over ](0)K(+) and B(0)-->K[over ](0)K(0) decays with 5.3sigma and 6.0sigma significance, respectively. We measure the branching fractions B(B(+)-->K[over ](0)K(+))=(1.22(-0.28-0.16)(+0.32+0.13))x10(-6) and B(B(0)-->K[over ](0)K(0))=(0.87(-0.20)(+0.25)+/-0.09)x10(-6), and partial-rate asymmetries A(CP)(B(+)-->K[over ](0)K(+))=0.13(-0.24)(+0.23)+/-0.02 and A(CP)(B(0)-->K[over ](0)K(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. |
| doi_str_mv | 10.1103/PhysRevLett.98.181804 |
| format | Article |
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We measure the branching fractions B(B(+)-->K[over ](0)K(+))=(1.22(-0.28-0.16)(+0.32+0.13))x10(-6) and B(B(0)-->K[over ](0)K(0))=(0.87(-0.20)(+0.25)+/-0.09)x10(-6), and partial-rate asymmetries A(CP)(B(+)-->K[over ](0)K(+))=0.13(-0.24)(+0.23)+/-0.02 and A(CP)(B(0)-->K[over ](0)K(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.</description><identifier>ISSN: 0031-9007</identifier><identifier>EISSN: 1079-7114</identifier><identifier>DOI: 10.1103/PhysRevLett.98.181804</identifier><identifier>PMID: 17501563</identifier><language>eng</language><publisher>United States</publisher><subject>ASYMMETRY ; B PLUS MESONS ; BRANCHING RATIO ; KAONS MINUS ; KAONS NEUTRAL ; KAONS PLUS ; PAIR PRODUCTION ; PARTICLE DECAY ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</subject><ispartof>Physical review letters, 2007-05, Vol.98 (18), p.181804-181804, Article 181804</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c335t-8e352f73c2cadbf5bee70b126ef4d4726eef481d0882834ca61500e5762d02413</citedby><cites>FETCH-LOGICAL-c335t-8e352f73c2cadbf5bee70b126ef4d4726eef481d0882834ca61500e5762d02413</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,315,782,786,887,2878,2879,27931,27932</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17501563$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/20951331$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Lin, S-W</creatorcontrib><creatorcontrib>Chang, P</creatorcontrib><creatorcontrib>Abe, K</creatorcontrib><creatorcontrib>Adachi, I</creatorcontrib><creatorcontrib>Aihara, H</creatorcontrib><creatorcontrib>Anipko, D</creatorcontrib><creatorcontrib>Arinstein, K</creatorcontrib><creatorcontrib>Aulchenko, V</creatorcontrib><creatorcontrib>Aushev, T</creatorcontrib><creatorcontrib>Aziz, T</creatorcontrib><creatorcontrib>Bakich, A M</creatorcontrib><creatorcontrib>Barberio, E</creatorcontrib><creatorcontrib>Bay, A</creatorcontrib><creatorcontrib>Bedny, I</creatorcontrib><creatorcontrib>Belous, K</creatorcontrib><creatorcontrib>Bitenc, U</creatorcontrib><creatorcontrib>Bizjak, I</creatorcontrib><creatorcontrib>Blyth, S</creatorcontrib><creatorcontrib>Bondar, A</creatorcontrib><creatorcontrib>Bozek, A</creatorcontrib><creatorcontrib>Bracko, M</creatorcontrib><creatorcontrib>Chao, Y</creatorcontrib><creatorcontrib>Chen, A</creatorcontrib><creatorcontrib>Chen, K-F</creatorcontrib><creatorcontrib>Chen, W T</creatorcontrib><creatorcontrib>Cheon, B G</creatorcontrib><creatorcontrib>Chistov, R</creatorcontrib><creatorcontrib>Choi, S-K</creatorcontrib><creatorcontrib>Choi, Y</creatorcontrib><creatorcontrib>Choi, Y K</creatorcontrib><creatorcontrib>Dalseno, J</creatorcontrib><creatorcontrib>Dash, M</creatorcontrib><creatorcontrib>Dragic, J</creatorcontrib><creatorcontrib>Eidelman, S</creatorcontrib><creatorcontrib>Fratina, S</creatorcontrib><creatorcontrib>Gabyshev, N</creatorcontrib><creatorcontrib>Gershon, T</creatorcontrib><creatorcontrib>Go, A</creatorcontrib><creatorcontrib>Gokhroo, G</creatorcontrib><creatorcontrib>Golob, B</creatorcontrib><creatorcontrib>Ha, H</creatorcontrib><creatorcontrib>Haba, J</creatorcontrib><creatorcontrib>Hara, T</creatorcontrib><creatorcontrib>Hayasaka, K</creatorcontrib><creatorcontrib>Hayashii, H</creatorcontrib><creatorcontrib>Hazumi, M</creatorcontrib><creatorcontrib>Heffernan, D</creatorcontrib><creatorcontrib>Hoshi, Y</creatorcontrib><creatorcontrib>Hou, S</creatorcontrib><creatorcontrib>Hou, W-S</creatorcontrib><creatorcontrib>Hsiung, Y B</creatorcontrib><creatorcontrib>Iijima, T</creatorcontrib><creatorcontrib>Ikado, K</creatorcontrib><creatorcontrib>Imoto, A</creatorcontrib><creatorcontrib>Inami, K</creatorcontrib><creatorcontrib>Ishikawa, A</creatorcontrib><creatorcontrib>Ishino, H</creatorcontrib><creatorcontrib>Itoh, R</creatorcontrib><creatorcontrib>Iwasaki, M</creatorcontrib><creatorcontrib>Iwasaki, Y</creatorcontrib><creatorcontrib>Kaji, H</creatorcontrib><creatorcontrib>Kang, J H</creatorcontrib><creatorcontrib>Katayama, N</creatorcontrib><creatorcontrib>Kawai, H</creatorcontrib><creatorcontrib>Kawasaki, T</creatorcontrib><creatorcontrib>Khan, H R</creatorcontrib><creatorcontrib>Kichimi, H</creatorcontrib><creatorcontrib>Kim, Y J</creatorcontrib><creatorcontrib>Kinoshita, K</creatorcontrib><creatorcontrib>Korpar, S</creatorcontrib><creatorcontrib>Krizan, P</creatorcontrib><creatorcontrib>Kulasiri, R</creatorcontrib><creatorcontrib>Kuo, C C</creatorcontrib><creatorcontrib>Kwon, Y-J</creatorcontrib><creatorcontrib>Lange, J S</creatorcontrib><creatorcontrib>Lee, J</creatorcontrib><creatorcontrib>Lee, M J</creatorcontrib><creatorcontrib>Lee, S E</creatorcontrib><creatorcontrib>Lesiak, T</creatorcontrib><creatorcontrib>Limosani, A</creatorcontrib><creatorcontrib>Mandl, F</creatorcontrib><creatorcontrib>Matsumoto, T</creatorcontrib><creatorcontrib>McOnie, S</creatorcontrib><creatorcontrib>Mitaroff, W</creatorcontrib><creatorcontrib>Miyabayashi, K</creatorcontrib><creatorcontrib>Miyake, H</creatorcontrib><creatorcontrib>Miyata, H</creatorcontrib><creatorcontrib>Miyazaki, Y</creatorcontrib><creatorcontrib>Mizuk, R</creatorcontrib><creatorcontrib>Mohapatra, D</creatorcontrib><creatorcontrib>Mori, T</creatorcontrib><creatorcontrib>Nakamura, I</creatorcontrib><creatorcontrib>Nakano, E</creatorcontrib><creatorcontrib>Nakao, M</creatorcontrib><creatorcontrib>Nishida, S</creatorcontrib><creatorcontrib>Nitoh, O</creatorcontrib><creatorcontrib>Noguchi, S</creatorcontrib><creatorcontrib>Nozaki, T</creatorcontrib><creatorcontrib>Ogawa, S</creatorcontrib><creatorcontrib>Belle Collaboration</creatorcontrib><title>Observation of B decays to two kaons</title><title>Physical review letters</title><addtitle>Phys Rev Lett</addtitle><description>Using 449x10(6) BB[over ] pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we observe clear signals for B(+)-->K[over ](0)K(+) and B(0)-->K[over ](0)K(0) decays with 5.3sigma and 6.0sigma significance, respectively. We measure the branching fractions B(B(+)-->K[over ](0)K(+))=(1.22(-0.28-0.16)(+0.32+0.13))x10(-6) and B(B(0)-->K[over ](0)K(0))=(0.87(-0.20)(+0.25)+/-0.09)x10(-6), and partial-rate asymmetries A(CP)(B(+)-->K[over ](0)K(+))=0.13(-0.24)(+0.23)+/-0.02 and A(CP)(B(0)-->K[over ](0)K(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.</description><subject>ASYMMETRY</subject><subject>B PLUS MESONS</subject><subject>BRANCHING RATIO</subject><subject>KAONS MINUS</subject><subject>KAONS NEUTRAL</subject><subject>KAONS PLUS</subject><subject>PAIR PRODUCTION</subject><subject>PARTICLE DECAY</subject><subject>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNpNkF1LwzAUhoMobk5_glJQvOs8p2ma9NINv2AwEb0OaXrKqlszm2yyf29HB3r1novnPS88jF0ijBGB370udv6NtjMKYZyrMSpUkB6xIYLMY4mYHrMhAMc4B5ADdub9JwBgkqlTNkApAEXGh-xmXnhqtybUrolcFU2ikqzZ-Si4KPy46Mu4xp-zk8osPV0ccsQ-Hh_ep8_xbP70Mr2fxZZzEWJFXCSV5DaxpiwqURBJKLpJqtIylV12h8ISlEoUT63JUACQkFlSQpIiH7Hr_q_zodbe1oHswrqmIRt0ArlAzvfUbU-tW_e9IR_0qvaWlkvTkNt4LUFgjpnoQNGDtnXet1TpdVuvTLvTCHovUf-TqHOle4ld7-owsClWVP61Dtb4L8tUbdc</recordid><startdate>20070504</startdate><enddate>20070504</enddate><creator>Lin, S-W</creator><creator>Chang, P</creator><creator>Abe, K</creator><creator>Adachi, I</creator><creator>Aihara, H</creator><creator>Anipko, D</creator><creator>Arinstein, K</creator><creator>Aulchenko, V</creator><creator>Aushev, T</creator><creator>Aziz, T</creator><creator>Bakich, A M</creator><creator>Barberio, 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S</creator><creator>Mitaroff, W</creator><creator>Miyabayashi, K</creator><creator>Miyake, H</creator><creator>Miyata, H</creator><creator>Miyazaki, Y</creator><creator>Mizuk, R</creator><creator>Mohapatra, D</creator><creator>Mori, T</creator><creator>Nakamura, I</creator><creator>Nakano, E</creator><creator>Nakao, M</creator><creator>Nishida, S</creator><creator>Nitoh, O</creator><creator>Noguchi, S</creator><creator>Nozaki, T</creator><creator>Ogawa, S</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>OTOTI</scope></search><sort><creationdate>20070504</creationdate><title>Observation of B decays to two kaons</title><author>Lin, S-W ; Chang, P ; Abe, K ; Adachi, I ; Aihara, H ; Anipko, D ; Arinstein, K ; Aulchenko, V ; Aushev, T ; Aziz, T ; Bakich, A M ; Barberio, E ; Bay, A ; Bedny, I ; Belous, K ; Bitenc, U ; Bizjak, I ; Blyth, S ; Bondar, A ; Bozek, A ; Bracko, M ; Chao, Y ; Chen, A ; Chen, K-F ; Chen, W T ; Cheon, B G ; Chistov, R ; Choi, S-K ; Choi, Y ; Choi, Y K ; Dalseno, J ; Dash, M ; Dragic, J ; Eidelman, S ; Fratina, S ; Gabyshev, N ; Gershon, T ; Go, A ; Gokhroo, G ; Golob, B ; Ha, H ; Haba, J ; Hara, T ; Hayasaka, K ; Hayashii, H ; Hazumi, M ; Heffernan, D ; Hoshi, Y ; Hou, S ; Hou, W-S ; Hsiung, Y B ; Iijima, T ; Ikado, K ; Imoto, A ; Inami, K ; Ishikawa, A ; Ishino, H ; Itoh, R ; Iwasaki, M ; Iwasaki, Y ; Kaji, H ; Kang, J H ; Katayama, N ; Kawai, H ; Kawasaki, T ; Khan, H R ; Kichimi, H ; Kim, Y J ; Kinoshita, K ; Korpar, S ; Krizan, P ; Kulasiri, R ; Kuo, C C ; Kwon, Y-J ; Lange, J S ; Lee, J ; Lee, M J ; Lee, S E ; Lesiak, T ; Limosani, A ; Mandl, F ; Matsumoto, T ; McOnie, S ; Mitaroff, W ; Miyabayashi, K ; Miyake, H ; Miyata, H ; Miyazaki, Y ; Mizuk, R ; Mohapatra, D ; Mori, T ; Nakamura, I ; Nakano, E ; Nakao, M ; Nishida, S ; Nitoh, O ; Noguchi, S ; Nozaki, T ; Ogawa, S</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c335t-8e352f73c2cadbf5bee70b126ef4d4726eef481d0882834ca61500e5762d02413</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>ASYMMETRY</topic><topic>B PLUS MESONS</topic><topic>BRANCHING RATIO</topic><topic>KAONS MINUS</topic><topic>KAONS NEUTRAL</topic><topic>KAONS PLUS</topic><topic>PAIR PRODUCTION</topic><topic>PARTICLE DECAY</topic><topic>PHYSICS OF ELEMENTARY PARTICLES AND FIELDS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lin, S-W</creatorcontrib><creatorcontrib>Chang, P</creatorcontrib><creatorcontrib>Abe, K</creatorcontrib><creatorcontrib>Adachi, I</creatorcontrib><creatorcontrib>Aihara, H</creatorcontrib><creatorcontrib>Anipko, D</creatorcontrib><creatorcontrib>Arinstein, K</creatorcontrib><creatorcontrib>Aulchenko, V</creatorcontrib><creatorcontrib>Aushev, T</creatorcontrib><creatorcontrib>Aziz, T</creatorcontrib><creatorcontrib>Bakich, A M</creatorcontrib><creatorcontrib>Barberio, E</creatorcontrib><creatorcontrib>Bay, A</creatorcontrib><creatorcontrib>Bedny, I</creatorcontrib><creatorcontrib>Belous, K</creatorcontrib><creatorcontrib>Bitenc, U</creatorcontrib><creatorcontrib>Bizjak, I</creatorcontrib><creatorcontrib>Blyth, S</creatorcontrib><creatorcontrib>Bondar, A</creatorcontrib><creatorcontrib>Bozek, A</creatorcontrib><creatorcontrib>Bracko, M</creatorcontrib><creatorcontrib>Chao, Y</creatorcontrib><creatorcontrib>Chen, A</creatorcontrib><creatorcontrib>Chen, K-F</creatorcontrib><creatorcontrib>Chen, W T</creatorcontrib><creatorcontrib>Cheon, B G</creatorcontrib><creatorcontrib>Chistov, R</creatorcontrib><creatorcontrib>Choi, S-K</creatorcontrib><creatorcontrib>Choi, Y</creatorcontrib><creatorcontrib>Choi, Y K</creatorcontrib><creatorcontrib>Dalseno, J</creatorcontrib><creatorcontrib>Dash, M</creatorcontrib><creatorcontrib>Dragic, J</creatorcontrib><creatorcontrib>Eidelman, S</creatorcontrib><creatorcontrib>Fratina, S</creatorcontrib><creatorcontrib>Gabyshev, N</creatorcontrib><creatorcontrib>Gershon, T</creatorcontrib><creatorcontrib>Go, A</creatorcontrib><creatorcontrib>Gokhroo, G</creatorcontrib><creatorcontrib>Golob, B</creatorcontrib><creatorcontrib>Ha, H</creatorcontrib><creatorcontrib>Haba, J</creatorcontrib><creatorcontrib>Hara, T</creatorcontrib><creatorcontrib>Hayasaka, K</creatorcontrib><creatorcontrib>Hayashii, H</creatorcontrib><creatorcontrib>Hazumi, M</creatorcontrib><creatorcontrib>Heffernan, D</creatorcontrib><creatorcontrib>Hoshi, Y</creatorcontrib><creatorcontrib>Hou, S</creatorcontrib><creatorcontrib>Hou, W-S</creatorcontrib><creatorcontrib>Hsiung, Y B</creatorcontrib><creatorcontrib>Iijima, T</creatorcontrib><creatorcontrib>Ikado, K</creatorcontrib><creatorcontrib>Imoto, A</creatorcontrib><creatorcontrib>Inami, K</creatorcontrib><creatorcontrib>Ishikawa, A</creatorcontrib><creatorcontrib>Ishino, H</creatorcontrib><creatorcontrib>Itoh, R</creatorcontrib><creatorcontrib>Iwasaki, M</creatorcontrib><creatorcontrib>Iwasaki, Y</creatorcontrib><creatorcontrib>Kaji, H</creatorcontrib><creatorcontrib>Kang, J H</creatorcontrib><creatorcontrib>Katayama, N</creatorcontrib><creatorcontrib>Kawai, H</creatorcontrib><creatorcontrib>Kawasaki, T</creatorcontrib><creatorcontrib>Khan, H R</creatorcontrib><creatorcontrib>Kichimi, H</creatorcontrib><creatorcontrib>Kim, Y J</creatorcontrib><creatorcontrib>Kinoshita, K</creatorcontrib><creatorcontrib>Korpar, S</creatorcontrib><creatorcontrib>Krizan, P</creatorcontrib><creatorcontrib>Kulasiri, R</creatorcontrib><creatorcontrib>Kuo, C C</creatorcontrib><creatorcontrib>Kwon, Y-J</creatorcontrib><creatorcontrib>Lange, J S</creatorcontrib><creatorcontrib>Lee, J</creatorcontrib><creatorcontrib>Lee, M J</creatorcontrib><creatorcontrib>Lee, S E</creatorcontrib><creatorcontrib>Lesiak, T</creatorcontrib><creatorcontrib>Limosani, A</creatorcontrib><creatorcontrib>Mandl, F</creatorcontrib><creatorcontrib>Matsumoto, T</creatorcontrib><creatorcontrib>McOnie, S</creatorcontrib><creatorcontrib>Mitaroff, W</creatorcontrib><creatorcontrib>Miyabayashi, K</creatorcontrib><creatorcontrib>Miyake, H</creatorcontrib><creatorcontrib>Miyata, H</creatorcontrib><creatorcontrib>Miyazaki, Y</creatorcontrib><creatorcontrib>Mizuk, R</creatorcontrib><creatorcontrib>Mohapatra, D</creatorcontrib><creatorcontrib>Mori, T</creatorcontrib><creatorcontrib>Nakamura, I</creatorcontrib><creatorcontrib>Nakano, E</creatorcontrib><creatorcontrib>Nakao, M</creatorcontrib><creatorcontrib>Nishida, S</creatorcontrib><creatorcontrib>Nitoh, O</creatorcontrib><creatorcontrib>Noguchi, S</creatorcontrib><creatorcontrib>Nozaki, T</creatorcontrib><creatorcontrib>Ogawa, S</creatorcontrib><creatorcontrib>Belle Collaboration</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lin, S-W</au><au>Chang, P</au><au>Abe, K</au><au>Adachi, I</au><au>Aihara, H</au><au>Anipko, D</au><au>Arinstein, K</au><au>Aulchenko, V</au><au>Aushev, T</au><au>Aziz, T</au><au>Bakich, A M</au><au>Barberio, E</au><au>Bay, A</au><au>Bedny, I</au><au>Belous, K</au><au>Bitenc, U</au><au>Bizjak, I</au><au>Blyth, S</au><au>Bondar, A</au><au>Bozek, A</au><au>Bracko, M</au><au>Chao, Y</au><au>Chen, A</au><au>Chen, K-F</au><au>Chen, W T</au><au>Cheon, B G</au><au>Chistov, R</au><au>Choi, S-K</au><au>Choi, Y</au><au>Choi, Y K</au><au>Dalseno, J</au><au>Dash, M</au><au>Dragic, J</au><au>Eidelman, S</au><au>Fratina, S</au><au>Gabyshev, N</au><au>Gershon, T</au><au>Go, A</au><au>Gokhroo, G</au><au>Golob, B</au><au>Ha, H</au><au>Haba, J</au><au>Hara, T</au><au>Hayasaka, K</au><au>Hayashii, H</au><au>Hazumi, M</au><au>Heffernan, D</au><au>Hoshi, Y</au><au>Hou, S</au><au>Hou, W-S</au><au>Hsiung, Y B</au><au>Iijima, T</au><au>Ikado, K</au><au>Imoto, A</au><au>Inami, K</au><au>Ishikawa, A</au><au>Ishino, H</au><au>Itoh, R</au><au>Iwasaki, M</au><au>Iwasaki, Y</au><au>Kaji, H</au><au>Kang, J H</au><au>Katayama, N</au><au>Kawai, H</au><au>Kawasaki, T</au><au>Khan, H R</au><au>Kichimi, H</au><au>Kim, Y J</au><au>Kinoshita, K</au><au>Korpar, S</au><au>Krizan, P</au><au>Kulasiri, R</au><au>Kuo, C C</au><au>Kwon, Y-J</au><au>Lange, J S</au><au>Lee, J</au><au>Lee, M J</au><au>Lee, S E</au><au>Lesiak, T</au><au>Limosani, A</au><au>Mandl, F</au><au>Matsumoto, T</au><au>McOnie, S</au><au>Mitaroff, W</au><au>Miyabayashi, K</au><au>Miyake, H</au><au>Miyata, H</au><au>Miyazaki, Y</au><au>Mizuk, R</au><au>Mohapatra, D</au><au>Mori, T</au><au>Nakamura, I</au><au>Nakano, E</au><au>Nakao, M</au><au>Nishida, S</au><au>Nitoh, O</au><au>Noguchi, S</au><au>Nozaki, T</au><au>Ogawa, S</au><aucorp>Belle Collaboration</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observation of B decays to two kaons</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2007-05-04</date><risdate>2007</risdate><volume>98</volume><issue>18</issue><spage>181804</spage><epage>181804</epage><pages>181804-181804</pages><artnum>181804</artnum><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>Using 449x10(6) BB[over ] pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we observe clear signals for B(+)-->K[over ](0)K(+) and B(0)-->K[over ](0)K(0) decays with 5.3sigma and 6.0sigma significance, respectively. We measure the branching fractions B(B(+)-->K[over ](0)K(+))=(1.22(-0.28-0.16)(+0.32+0.13))x10(-6) and B(B(0)-->K[over ](0)K(0))=(0.87(-0.20)(+0.25)+/-0.09)x10(-6), and partial-rate asymmetries A(CP)(B(+)-->K[over ](0)K(+))=0.13(-0.24)(+0.23)+/-0.02 and A(CP)(B(0)-->K[over ](0)K(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.</abstract><cop>United States</cop><pmid>17501563</pmid><doi>10.1103/PhysRevLett.98.181804</doi><tpages>1</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 2007-05, Vol.98 (18), p.181804-181804, Article 181804 |
| issn | 0031-9007 1079-7114 |
| language | eng |
| recordid | cdi_osti_scitechconnect_20951331 |
| source | American Physical Society Journals |
| subjects | ASYMMETRY B PLUS MESONS BRANCHING RATIO KAONS MINUS KAONS NEUTRAL KAONS PLUS PAIR PRODUCTION PARTICLE DECAY PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
| title | Observation of B decays to two kaons |
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