通过对三体无粲B⁺⁻→K⁺⁻π⁺⁻π⁺⁻衰变的分析，得到B⁺⁻→ρ(770)⁰K⁺⁻中存在大的直接CP破坏的证据。
Evidence for large direct CP violation in B+/- --> rho(770)0K+/- from analysis of three-body charmless B+/- --> K+/-pi+/-pi+/- decays.
作者信息
Garmash A, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Aziz T, Bahinipati S, Bakich A M, Barbero M, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder T E, Chang P, Chao Y, Chen A, Chen K-F, Chen W T, Cheon B G, Chistov R, Choi Y, Choi Y K, Chuvikov A, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Ha H C, Hara T, Hasegawa Y, Hastings N C, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou W-S, Hsiung Y B, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan H R, Kichimi H, Kim S K, Kim S M, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kuo C C, Kuzmin A, Kwon Y-J, Lee S E, Lesiak T, Limosani A, Lin S-W, Liventsev D, Mandl F, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Nagamine T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ohshima T, Okabe T, Okuno S, Olsen S L, Ozaki H, Park C W, Park H, Park K S, Peak L S, Pestotnik R, Piilonen L E, Rozanska M, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwanda C, Schwartz A J, Seidl R, Sevior M E, Shibuya H, Shwartz B, Singh J B, Somov A, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Suzuki S Y, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor G N, Teramoto Y, Tian X C, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Uno S, Urquijo P, Varner G, Varvell K E, Villa S, Wang C H, Wang M-Z, Watanabe Y, Won E, Xie Q L, Yamaguchi A, Yamauchi M, Yang Heyoung, Zhang L M, Zhang Z P, Zhilich V, Zürcher D
机构信息
Princeton University, Princeton, New Jersey 08544, USA.
出版信息
Phys Rev Lett. 2006 Jun 30;96(25):251803. doi: 10.1103/PhysRevLett.96.251803. Epub 2006 Jun 29.
We report results on a Dalitz analysis of three-body charmless B+/- --> K+/-pi+/-pi+/- decay including searches for direct CP violation. We report the first observation of the decay B+/- --> f2(1270)K+/- with a statistical significance above 6sigma. We also observe first evidence for large direct CP violation in the B+/- --> rho(770)0K+/- channel. The results are obtained with a data sample that contains 386 10(6) BB pairs collected at the Y(4s) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
我们报告了对三体无 charm 衰变 B⁺/⁻→K⁺/⁻π⁺/⁻π⁺/⁻进行 Dalitz 分析的结果，包括对直接 CP 破坏的搜索。我们首次观测到衰变 B⁺/⁻→f₂(1270)K⁺/⁻，其统计显著性高于 6σ。我们还首次观测到在 B⁺/⁻→ρ(770)⁰K⁺/⁻通道中存在大的直接 CP 破坏的证据。这些结果是利用在 KEKB 非对称能量正负电子对撞机上，使用 Belle 探测器在 Y(4s)共振处收集的包含 386×10⁶个 B⁺B⁻对的数据样本获得的。
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