Measurement Of The Direct Cp Asymmetry In Over-Bar & Rarr; Gamma; Decays With A Lepton Tag

L Pesantez, P Urquijo,J Dingfelder,A Abdesselam,I Adachi,K Adamczyk,H Aihara,S Al Said,K Arinstein,D M Asner,V Aulchenko,T Aushev,R Ayad, S Bahinipati,A M Bakich,Vikas Bansal, E Barberio,V Bhardwaj,B Bhuyan,A Bobrov,A Bondar, G Bonvicini,A Bozek, M Bracko,T E Browder, D Cervenkov,V Chekelian,A Chen,B G Cheon, K Chilikin,R Chistov,K Cho,V Chobanova,Y Choi,D Cinabro,J Dalseno,Z Doležal, Z Drasal,A Drutskoy,D Dutta,S Eidelman,H Farhat, J Fast, T Ferber,O Frost,V Gaur,N Gabyshev,Sanmay Ganguly,A Garmash, D Getzkow,R Gillard, Y M Goh, B Golob,J Haba, J Hasenbusch,X H He,Axel R Heller,T Horiguchi,W S Hou, M Huschle,T Iijima,K Inami,A Ishikawa,R Itoh,Yukimoto Iwasaki, I Jaegle,D Joffe,T Julius,Kyung Ho Kang,E Kato, T Kawasaki, C Kiesling,D Y Kim,Jung Bin Kim,Kyu Tae Kim,M J Kim,S H Kim,Yoon Jae Kim,B R Ko, P Kodys, S Korpar, P Križan,P Krokovny, B Kronenbitter,T Kuhr,T Kumita,A Kuzmin,Y J Kwon,J S Lange,In Sook Lee,Yiming Li,L Li Gioi,J Libby,D Liventsev,P Lukin, D Matvienko,K Miyabayashi,H Miyata,R Mizuk

PHYSICAL REVIEW LETTERS（2015）

引用 7|浏览50

暂无评分

摘要

We report the measurement of the direct CP asymmetry in the radiative (B) over bar -> Xs+d gamma decay using a data sample of (772 +/- 11) x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The CP asymmetry is measured as a function of the photon energy threshold. For E-gamma* >= 2.1 GeV, where E-gamma* is the photon energy in the center-of-mass frame, we obtain A(CP) ((B) over bar -> Xs+d gamma) = (2.2 +/- 3.9 +/- 0.9)%, consistent with the standard model prediction.

查看译文

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要