Measurement of the D → K- π+ strong phase difference in ψ(3770) → D0(D)over-bar0

被引：193

作者：

Ablikim, M.

Achasov, M. N.

Ai, X. C.

Albayrak, O.

Albrecht, M.

Ambrose, D. J.

An, F. F.

An, Q.

Bai, J. Z.

Ferroli, R. Baldini

Ban, Y.

Bennett, D. W.

Bennett, J. V.

Bertani, M.

Bian, J. M.

Boger, E.

Bondarenko, O.

Boyko, I.

Braun, S.

Briere, R. A.

Cai, H.

Cai, X.

Cakir, O.

Calcaterra, A.

Cao, G. F.

Cetin, S. A.

Chang, J. F.

Cai, H.

Cai, X.

Cakir, O.

Calcaterra, A.

Cao, G. F.

Cetin, S. A.

Chang, J. F.

Chelkov, G.

Chen, G.

Chen, H. S.

Chen, J. C.

Chen, M. L.

Chen, S. J.

Chen, X.

Chen, X. R.

Chen, Y. B.

Cheng, H. P.

Chu, X. K.

Chu, Y. P.

Cronin-Hennessy, D.

Dai, H. L.

Dai, J. P.

Dedovich, D.

机构：

[1] Institute of High Energy Physics, Beijing

[2] Beihang University, Beijing

[3] Bochum Ruhr-University, Bochum

[4] Carnegie Mellon University, Pittsburgh, 15213, PA

[5] Central China Normal University, Wuhan

[6] China Center of Advanced Science and Technology, Beijing

[7] COMSATS Institute of Information Technology, Defence Road, Off Raiwind Road, Lahore

[8] G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk

[9] GSI Helmholtzcentre for Heavy Ion Research GmbH, Darmstadt

[10] Guangxi Normal University, Guilin

[11] GuangXi University, Nanning

[12] Hangzhou Normal University, Hangzhou

[13] Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, Mainz

[14] Henan Normal University, Xinxiang

[15] Henan University of Science and Technology, Luoyang

[16] Huangshan College, Huangshan

[17] Hunan University, Changsha

[18] Indiana University, Bloomington, 47405, IN

[19] INFN Laboratori Nazionali di Frascati, Frascati

[20] INFN and University of Perugia, Perugia

[21] Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, Mainz

[22] Joint Institute for Nuclear Research, Dubna, Moscow region

[23] KVI, University of Groningen, AA Groningen

[24] Lanzhou University, Lanzhou

[25] Liaoning University, Shenyang

[26] Nanjing Normal University, Nanjing

[27] Nanjing University, Nanjing

[28] Nankai university, Tianjin

[29] Peking University, Beijing

[30] Seoul National University, Seoul

[31] Shandong University, Jinan

[32] Shanxi University, Taiyuan

[33] Sichuan University, Chengdu

[34] Soochow University, Suzhou

[35] Sun Yat-Sen University, Guangzhou

[36] Tsinghua University, Beijing

[37] Ankara University, Dogol Caddesi, Tandogan, 06100, Ankara

[38] Dogus University, Istanbul

[39] Uludag University, Bursa

[40] Universitaet Giessen, Giessen

[41] University of Chinese Academy of Sciences, Beijing

[42] University of Hawaii, Honolulu, 96822, HI

[43] University of Minnesota, Minneapolis, 55455, MN

[44] University of Rochester, Rochester, 14627, NY

[45] University of Science and Technology of China, Hefei

[46] University of South China, Hengyang

[47] University of the Punjab, Lahore

[48] University of Turin, Turin

[49] University of Eastern Piedmont, Alessandria

[50] INFN, Turin

来源：

PHYSICS LETTERS B | 2014年 / 734卷

基金：

新加坡国家研究基金会; 中国国家自然科学基金; 美国国家科学基金会;

关键词：

BESIII; D-0-(D)over-bar(0) oscillation; Strong phase difference; CP-VIOLATION; DECAYS;

D O I：

10.1016/j.physletb.2014.05.071

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study D-0(D) over bar (0) pairs produced in e(+)e(-) collisions at root s = 3.773 GeV using a data sample of 2.92 fb(-1) collected with the BESIII detector. We measured the asymmetry A(K pi)(CP) of the branching fractions of D -> K-pi(+) in CP-odd and CP-even eigenstates to be (12.7 +/- 1.3 +/- 0.7) x 10(-2). A(K pi)(CP) can be used to extract the strong phase difference delta(K pi) between the doubly Cabibbo-suppressed process (D) over bar (0) -> K-pi(+) and the Cabibbo-favored process D-0 -> K-pi(+). Using world-average values of external parameters, we obtain cos delta(K pi) = 1.02 +/- 0.11 +/- 0.06 +/- 0.01. Here, the first and second uncertainties are statistical and systematic, respectively, while the third uncertainty arises from the external parameters. This is the most precise measurement of delta(K pi) to date. (C) 2014 The Authors. Published by Elsevier B.V.

引用

页码：227 / 233

页数：7

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