Direct measurements of the branching fractions for D0 → K-e+νe and D0 → π-e+νe and determinations of the form factors f+K(0) and f+π(0)

M. Ablikim; J. Z. Bai; Y. Ban; J. G. Bian; X. Cai; J. F. Chang; H. F. Chen; H. S. Chen; H. X. Chen; J. C. Chen; J. Chen; J. Chen; M. L. Chen; Y. B. Chen; S. P. Chi; Y. P. Chu; X. Z. Cui; H. L. Dai; Y. S. Dai; Z. Y. Deng; L. Y. Dong; S. X. Du; Z. Z. Du; J. Fang; S. S. Fang; C. D. Fu; H. Y. Fu; C. S. Gao; Y. N. Gao; M. Y. Gong; W. X. Gong; S. D. Gu; Y. N. Guo; Y. Q. Guo; K. L. He; M. He; X. He; Y. K. Heng; H. M. Hu; T. Hu; L. Huang; X. P. Huang; X. B. Ji; Q. Y. Jia; C. H. Jiang; X. S. Jiang; D. P. Jin; S. Jin; Y. Jin; Y. F. Lai; F. Li; G. Li; H. H. Li; J. Li; J. C. Li; Q. J. Li; R. B. Li; R. Y. Li; S. M. Li; W. G. Li; X. L. Li; X. Q. Li; X. S. Li; Y. F. Liang; H. B. Liao; C. X. Liu; F. Liu; F. Liu; H. M. Liu; J. B. Liu; J. P. liu; R. G. Liu; Z. A. Liu; Z. X. Liu; F. Lu; G. R. Lu; J. G. Lu; C. L. Luo; X. L. Luo; F. C. Mag; J. M. Ma; L. L. Ma; Q. M. Ma; X. Y. Ma; Z. P. Mao; X. H. Mo; J. Nie; Z. D. Nie; H. P. Peng; N. D. Qi; C. D. Qian; H. Qin; J. F. Qiu; Z. Y. Ren; G. Rong; L. Y. Shan; L. Shang; D. L. Shen; X. Y. Shen; H. Y. Sheng; F. Shi; X. Shi; H. S. Sun; S. S. Sun; Y. Z. Sun; Z. J. Sun; X. Tang; N. Tao; Y. R. Tian; G. L. Tong; D. Y. Wang; J. Z. Wang; K. Wang; L. Wang; L. S. Wang; M. Wang; P. Wang; P. L. Wang; S. Z. Wang; W. F. Wang; Y. F. Wang; Z. Wang; Z. Wang; Z. Wang; Z. Y. Wang; C. L. Wei; D. H. Wei; N. Wu; Y. M. Wu; X. M. Xia; X. X. Xie; B. Xing; G. F. Xu; H. Xu; Y. Xu; S. T. Xue; M. L. Yan; F. Yang; H. X. Yang; J. Yang; S. D. Yang; Y. X. Yang; M. Ye; M. H. Ye; Y. X. Ye; L. H. Yi; Z. Y. Yi; C. S. Yu; G. W. Yu; C. Z. Yuan; J. M. Yuan; Y. Yuan; Q. Yue; S. L. Zang; Y. Zeng; Y. Zeng; B. X. Zhang; B. Y. Zhang; C. C. Zhang; D. H. Zhang; H. Y. Zhang; J. Zhang; J. Y. Zhang; J. W. Zhang; L. S. Zhang; Q. J. Zhang; S. Q. Zhang; X. M. Zhang; X. Y. Zhang; Y. J. Zhang; Y. Y. Zhang; Y. Zhang; Z. P. Zhang; Z. Q. Zhang; D. X. Zhao; J. B. Zhao; J. W. Zhao; M. G. Zhao; P. P. Zhao; W. R. Zhao; X. J. Zhao; Y. B. Zhao; H. Q. Zheng; J. P. Zheng; L. S. Zheng; Z. P. Zheng; X. C. Zhong; B. Q. Zhou; G. M. Zhou; L. Zhou; N. F. Zhou; K. J. Zhu; Q. M. Zhu; Y. C. Zhu; Y. S. Zhu; Y. Zhu; Z. A. Zhu; B. A. Zhuang; B. S. Zou

doi:10.1016/j.physletb.2004.07.004

Direct measurements of the branching fractions for D⁰ → K^-e⁺ν_e and D⁰ → π^-e⁺ν_e and determinations of the form factors f₊^K(0) and f₊^π(0)

M. Ablikim
, J. Z. Bai
, Y. Ban
, J. G. Bian
, X. Cai
, J. F. Chang
, H. F. Chen
, H. S. Chen
, H. X. Chen
, J. C. Chen
, J. Chen
, J. Chen
, M. L. Chen
, Y. B. Chen
, S. P. Chi
, Y. P. Chu
, X. Z. Cui
, H. L. Dai
, Y. S. Dai
, Z. Y. Deng

L. Y. Dong, S. X. Du, Z. Z. Du, J. Fang, S. S. Fang, C. D. Fu, H. Y. Fu, C. S. Gao, Y. N. Gao, M. Y. Gong, W. X. Gong, S. D. Gu, Y. N. Guo, Y. Q. Guo, K. L. He, M. He, X. He, Y. K. Heng, H. M. Hu, T. Hu, L. Huang, X. P. Huang, X. B. Ji, Q. Y. Jia, C. H. Jiang, X. S. Jiang, D. P. Jin, S. Jin, Y. Jin, Y. F. Lai, F. Li, G. Li, H. H. Li, J. Li, J. C. Li, Q. J. Li, R. B. Li, R. Y. Li, S. M. Li, W. G. Li, X. L. Li, X. Q. Li, X. S. Li, Y. F. Liang, H. B. Liao, C. X. Liu, F. Liu, F. Liu, H. M. Liu, J. B. Liu, J. P. liu, R. G. Liu, Z. A. Liu, Z. X. Liu, F. Lu, G. R. Lu, J. G. Lu, C. L. Luo, X. L. Luo, F. C. Mag, J. M. Ma, L. L. Ma, Q. M. Ma, X. Y. Ma, Z. P. Mao, X. H. Mo, J. Nie, Z. D. Nie, H. P. Peng, N. D. Qi, C. D. Qian, H. Qin, J. F. Qiu, Z. Y. Ren, G. Rong, L. Y. Shan, L. Shang, D. L. Shen, X. Y. Shen, H. Y. Sheng, F. Shi, X. Shi, H. S. Sun, S. S. Sun, Y. Z. Sun, Z. J. Sun, X. Tang, N. Tao, Y. R. Tian, G. L. Tong, D. Y. Wang, J. Z. Wang, K. Wang, L. Wang, L. S. Wang, M. Wang, P. Wang, P. L. Wang, S. Z. Wang, W. F. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. Wang, Z. Y. Wang, C. L. Wei, D. H. Wei, N. Wu, Y. M. Wu, X. M. Xia, X. X. Xie, B. Xing, G. F. Xu, H. Xu, Y. Xu, S. T. Xue, M. L. Yan, F. Yang, H. X. Yang, J. Yang, S. D. Yang, Y. X. Yang, M. Ye, M. H. Ye, Y. X. Ye, L. H. Yi, Z. Y. Yi, C. S. Yu, G. W. Yu, C. Z. Yuan, J. M. Yuan, Y. Yuan, Q. Yue, S. L. Zang, Y. Zeng, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Y. Zhang, J. Zhang, J. Y. Zhang, J. W. Zhang, L. S. Zhang, Q. J. Zhang, S. Q. Zhang, X. M. Zhang, X. Y. Zhang, Y. J. Zhang, Y. Y. Zhang, Y. Zhang, Z. P. Zhang, Z. Q. Zhang, D. X. Zhao, J. B. Zhao, J. W. Zhao, M. G. Zhao, P. P. Zhao, W. R. Zhao, X. J. Zhao, Y. B. Zhao, H. Q. Zheng, J. P. Zheng, L. S. Zheng, Z. P. Zheng, X. C. Zhong, B. Q. Zhou, G. M. Zhou, L. Zhou, N. F. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Y. Zhu, Z. A. Zhu, B. A. Zhuang, B. S. Zou

CAS - Institute of High Energy Physics
Peking University
University of Science and Technology of China
Hunan University
China Center of Advanced Science and Technology World Laboratory
Zhejiang University
Tsinghua University
Shandong University
Liaoning University
Nankai University
Sichuan University
Central China Normal University
Wuhan University
Henan Normal University
Nanjing Normal University
Shanghai Jiao Tong University
Guangxi Normal University

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

The absolute branching fractions for the decays D⁰→K ^-e⁺ν_e and D⁰→π ^-e⁺ν_e are determined using 7584±198±341 singly tagged D̄⁰ sample from the data collected around 3.773 GeV with the BES-II detector at the BEPC. In the system recoiling against the singly tagged D̄⁰ meson, 104.0±10.9 events for D⁰→K^-e ⁺ν_e and 9.0±3.6 events for D ⁰→π^-e⁺ν_e decays are observed. Those yield the absolute branching fractions to be BF(D ⁰→K^-e⁺ν_e)=(3.82±0. 40±0.27)% and BF(D⁰→π^-e⁺ν _e)=(0.33±0.13±0.03)%. The vector form factors are determined to be |f₊^K(0)|=0.78±0.04±0.03 and |f₊^π(0)|=0.73±0.14±0.06. The ratio of the two form factors is measured to be |f₊^π(0)/f ₊^K(0)|=0.93±0.19±0.07.

Original language	English
Pages (from-to)	39-46
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	597
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2004.07.004
State	Published - 2 Sep 2004
Externally published	Yes

Access to Document

10.1016/j.physletb.2004.07.004

Cite this

Ablikim, M., Bai, J. Z., Ban, Y., Bian, J. G., Cai, X., Chang, J. F., Chen, H. F., Chen, H. S., Chen, H. X., Chen, J. C., Chen, J., Chen, J., Chen, M. L., Chen, Y. B., Chi, S. P., Chu, Y. P., Cui, X. Z., Dai, H. L., Dai, Y. S., ... Zou, B. S. (2004). Direct measurements of the branching fractions for D⁰ → K^-e⁺ν_e and D⁰ → π^-e⁺ν_e and determinations of the form factors f₊^K(0) and f₊^π(0). Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 597(1), 39-46. https://doi.org/10.1016/j.physletb.2004.07.004

@article{229793e84f924c31afc174aba581767a,

title = "Direct measurements of the branching fractions for D0 → K-e+νe and D0 → π-e+νe and determinations of the form factors f+K(0) and f+π(0)",

abstract = "The absolute branching fractions for the decays D0→K -e+νe and D0→π -e+νe are determined using 7584±198±341 singly tagged {\=D}0 sample from the data collected around 3.773 GeV with the BES-II detector at the BEPC. In the system recoiling against the singly tagged {\=D}0 meson, 104.0±10.9 events for D0→K-e +νe and 9.0±3.6 events for D 0→π-e+νe decays are observed. Those yield the absolute branching fractions to be BF(D 0→K-e+νe)=(3.82±0. 40±0.27)\% and BF(D0→π-e+ν e)=(0.33±0.13±0.03)\%. The vector form factors are determined to be |f+K(0)|=0.78±0.04±0.03 and |f+π(0)|=0.73±0.14±0.06. The ratio of the two form factors is measured to be |f+π(0)/f +K(0)|=0.93±0.19±0.07.",

author = "M. Ablikim and Bai, \{J. Z.\} and Y. Ban and Bian, \{J. G.\} and X. Cai and Chang, \{J. F.\} and Chen, \{H. F.\} and Chen, \{H. S.\} and Chen, \{H. X.\} and Chen, \{J. C.\} and J. Chen and J. Chen and Chen, \{M. L.\} and Chen, \{Y. B.\} and Chi, \{S. P.\} and Chu, \{Y. P.\} and Cui, \{X. Z.\} and Dai, \{H. L.\} and Dai, \{Y. S.\} and Deng, \{Z. Y.\} and Dong, \{L. Y.\} and Du, \{S. X.\} and Du, \{Z. Z.\} and J. Fang and Fang, \{S. S.\} and Fu, \{C. D.\} and Fu, \{H. Y.\} and Gao, \{C. S.\} and Gao, \{Y. N.\} and Gong, \{M. Y.\} and Gong, \{W. X.\} and Gu, \{S. D.\} and Guo, \{Y. N.\} and Guo, \{Y. Q.\} and He, \{K. L.\} and M. He and X. He and Heng, \{Y. K.\} and Hu, \{H. M.\} and T. Hu and L. Huang and Huang, \{X. P.\} and Ji, \{X. B.\} and Jia, \{Q. Y.\} and Jiang, \{C. H.\} and Jiang, \{X. S.\} and Jin, \{D. P.\} and S. Jin and Y. Jin and Lai, \{Y. F.\} and F. Li and G. Li and Li, \{H. H.\} and J. Li and Li, \{J. C.\} and Li, \{Q. J.\} and Li, \{R. B.\} and Li, \{R. Y.\} and Li, \{S. M.\} and Li, \{W. G.\} and Li, \{X. L.\} and Li, \{X. Q.\} and Li, \{X. S.\} and Liang, \{Y. F.\} and Liao, \{H. B.\} and Liu, \{C. X.\} and F. Liu and F. Liu and Liu, \{H. M.\} and Liu, \{J. B.\} and liu, \{J. P.\} and Liu, \{R. G.\} and Liu, \{Z. A.\} and Liu, \{Z. X.\} and F. Lu and Lu, \{G. R.\} and Lu, \{J. G.\} and Luo, \{C. L.\} and Luo, \{X. L.\} and Mag, \{F. C.\} and Ma, \{J. M.\} and Ma, \{L. L.\} and Ma, \{Q. M.\} and Ma, \{X. Y.\} and Mao, \{Z. P.\} and Mo, \{X. H.\} and J. Nie and Nie, \{Z. D.\} and Peng, \{H. P.\} and Qi, \{N. D.\} and Qian, \{C. D.\} and H. Qin and Qiu, \{J. F.\} and Ren, \{Z. Y.\} and G. Rong and Shan, \{L. Y.\} and L. Shang and Shen, \{D. L.\} and Shen, \{X. Y.\} and Sheng, \{H. Y.\} and F. Shi and X. Shi and Sun, \{H. S.\} and Sun, \{S. S.\} and Sun, \{Y. Z.\} and Sun, \{Z. J.\} and X. Tang and N. Tao and Tian, \{Y. R.\} and Tong, \{G. L.\} and Wang, \{D. Y.\} and Wang, \{J. Z.\} and K. Wang and L. Wang and Wang, \{L. S.\} and M. Wang and P. Wang and Wang, \{P. L.\} and Wang, \{S. Z.\} and Wang, \{W. F.\} and Wang, \{Y. F.\} and Z. Wang and Z. Wang and Z. Wang and Wang, \{Z. Y.\} and Wei, \{C. L.\} and Wei, \{D. H.\} and N. Wu and Wu, \{Y. M.\} and Xia, \{X. M.\} and Xie, \{X. X.\} and B. Xing and Xu, \{G. F.\} and H. Xu and Y. Xu and Xue, \{S. T.\} and Yan, \{M. L.\} and F. Yang and Yang, \{H. X.\} and J. Yang and Yang, \{S. D.\} and Yang, \{Y. X.\} and M. Ye and Ye, \{M. H.\} and Ye, \{Y. X.\} and Yi, \{L. H.\} and Yi, \{Z. Y.\} and Yu, \{C. S.\} and Yu, \{G. W.\} and Yuan, \{C. Z.\} and Yuan, \{J. M.\} and Y. Yuan and Q. Yue and Zang, \{S. L.\} and Y. Zeng and Y. Zeng and Zhang, \{B. X.\} and Zhang, \{B. Y.\} and Zhang, \{C. C.\} and Zhang, \{D. H.\} and Zhang, \{H. Y.\} and J. Zhang and Zhang, \{J. Y.\} and Zhang, \{J. W.\} and Zhang, \{L. S.\} and Zhang, \{Q. J.\} and Zhang, \{S. Q.\} and Zhang, \{X. M.\} and Zhang, \{X. Y.\} and Zhang, \{Y. J.\} and Zhang, \{Y. Y.\} and Y. Zhang and Zhang, \{Z. P.\} and Zhang, \{Z. Q.\} and Zhao, \{D. X.\} and Zhao, \{J. B.\} and Zhao, \{J. W.\} and Zhao, \{M. G.\} and Zhao, \{P. P.\} and Zhao, \{W. R.\} and Zhao, \{X. J.\} and Zhao, \{Y. B.\} and Zheng, \{H. Q.\} and Zheng, \{J. P.\} and Zheng, \{L. S.\} and Zheng, \{Z. P.\} and Zhong, \{X. C.\} and Zhou, \{B. Q.\} and Zhou, \{G. M.\} and L. Zhou and Zhou, \{N. F.\} and Zhu, \{K. J.\} and Zhu, \{Q. M.\} and Zhu, \{Y. C.\} and Zhu, \{Y. S.\} and Y. Zhu and Zhu, \{Z. A.\} and Zhuang, \{B. A.\} and Zou, \{B. S.\}",

year = "2004",

month = sep,

day = "2",

doi = "10.1016/j.physletb.2004.07.004",

language = "英语",

volume = "597",

pages = "39--46",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1",

}

Ablikim, M, Bai, JZ, Ban, Y, Bian, JG, Cai, X, Chang, JF, Chen, HF, Chen, HS, Chen, HX, Chen, JC, Chen, J, Chen, J, Chen, ML, Chen, YB, Chi, SP, Chu, YP, Cui, XZ, Dai, HL, Dai, YS, Deng, ZY, Dong, LY, Du, SX, Du, ZZ, Fang, J, Fang, SS, Fu, CD, Fu, HY, Gao, CS, Gao, YN, Gong, MY, Gong, WX, Gu, SD, Guo, YN, Guo, YQ, He, KL, He, M, He, X, Heng, YK, Hu, HM, Hu, T, Huang, L, Huang, XP, Ji, XB, Jia, QY, Jiang, CH, Jiang, XS, Jin, DP, Jin, S, Jin, Y, Lai, YF, Li, F, Li, G, Li, HH, Li, J, Li, JC, Li, QJ, Li, RB, Li, RY, Li, SM, Li, WG, Li, XL, Li, XQ, Li, XS, Liang, YF, Liao, HB, Liu, CX, Liu, F, Liu, F, Liu, HM, Liu, JB, liu, JP, Liu, RG, Liu, ZA, Liu, ZX, Lu, F, Lu, GR, Lu, JG, Luo, CL, Luo, XL, Mag, FC, Ma, JM, Ma, LL, Ma, QM, Ma, XY, Mao, ZP, Mo, XH, Nie, J, Nie, ZD, Peng, HP, Qi, ND, Qian, CD, Qin, H, Qiu, JF, Ren, ZY, Rong, G, Shan, LY, Shang, L, Shen, DL, Shen, XY, Sheng, HY, Shi, F, Shi, X, Sun, HS, Sun, SS, Sun, YZ, Sun, ZJ, Tang, X, Tao, N, Tian, YR, Tong, GL, Wang, DY, Wang, JZ, Wang, K, Wang, L, Wang, LS, Wang, M, Wang, P, Wang, PL, Wang, SZ, Wang, WF, Wang, YF, Wang, Z, Wang, Z, Wang, Z, Wang, ZY, Wei, CL, Wei, DH, Wu, N, Wu, YM, Xia, XM, Xie, XX, Xing, B, Xu, GF, Xu, H, Xu, Y, Xue, ST, Yan, ML, Yang, F, Yang, HX, Yang, J, Yang, SD, Yang, YX, Ye, M, Ye, MH, Ye, YX, Yi, LH, Yi, ZY, Yu, CS, Yu, GW, Yuan, CZ, Yuan, JM, Yuan, Y, Yue, Q, Zang, SL, Zeng, Y, Zeng, Y, Zhang, BX, Zhang, BY, Zhang, CC, Zhang, DH, Zhang, HY, Zhang, J, Zhang, JY, Zhang, JW, Zhang, LS, Zhang, QJ, Zhang, SQ, Zhang, XM, Zhang, XY, Zhang, YJ, Zhang, YY, Zhang, Y, Zhang, ZP, Zhang, ZQ, Zhao, DX, Zhao, JB, Zhao, JW, Zhao, MG, Zhao, PP, Zhao, WR, Zhao, XJ, Zhao, YB, Zheng, HQ, Zheng, JP, Zheng, LS, Zheng, ZP, Zhong, XC, Zhou, BQ, Zhou, GM, Zhou, L, Zhou, NF, Zhu, KJ, Zhu, QM, Zhu, YC, Zhu, YS, Zhu, Y, Zhu, ZA, Zhuang, BA & Zou, BS 2004, 'Direct measurements of the branching fractions for D⁰ → K^-e⁺ν_e and D⁰ → π^-e⁺ν_e and determinations of the form factors f₊^K(0) and f₊^π(0)', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 597, no. 1, pp. 39-46. https://doi.org/10.1016/j.physletb.2004.07.004

Direct measurements of the branching fractions for D⁰ → K^-e⁺ν_e and D⁰ → π^-e⁺ν_e and determinations of the form factors f₊^K(0) and f₊^π(0). / Ablikim, M.; Bai, J. Z.; Ban, Y. et al.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 597, No. 1, 02.09.2004, p. 39-46.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Direct measurements of the branching fractions for D0 → K-e+νe and D0 → π-e+νe and determinations of the form factors f+K(0) and f+π(0)

AU - Ablikim, M.

AU - Bai, J. Z.

AU - Ban, Y.

AU - Bian, J. G.

AU - Cai, X.

AU - Chang, J. F.

AU - Chen, H. F.

AU - Chen, H. S.

AU - Chen, H. X.

AU - Chen, J. C.

AU - Chen, J.

AU - Chen, M. L.

AU - Chen, Y. B.

AU - Chi, S. P.

AU - Chu, Y. P.

AU - Cui, X. Z.

AU - Dai, H. L.

AU - Dai, Y. S.

AU - Deng, Z. Y.

AU - Dong, L. Y.

AU - Du, S. X.

AU - Du, Z. Z.

AU - Fang, J.

AU - Fang, S. S.

AU - Fu, C. D.

AU - Fu, H. Y.

AU - Gao, C. S.

AU - Gao, Y. N.

AU - Gong, M. Y.

AU - Gong, W. X.

AU - Gu, S. D.

AU - Guo, Y. N.

AU - Guo, Y. Q.

AU - He, K. L.

AU - He, M.

AU - He, X.

AU - Heng, Y. K.

AU - Hu, H. M.

AU - Hu, T.

AU - Huang, L.

AU - Huang, X. P.

AU - Ji, X. B.

AU - Jia, Q. Y.

AU - Jiang, C. H.

AU - Jiang, X. S.

AU - Jin, D. P.

AU - Jin, S.

AU - Jin, Y.

AU - Lai, Y. F.

AU - Li, F.

AU - Li, G.

AU - Li, H. H.

AU - Li, J.

AU - Li, J. C.

AU - Li, Q. J.

AU - Li, R. B.

AU - Li, R. Y.

AU - Li, S. M.

AU - Li, W. G.

AU - Li, X. L.

AU - Li, X. Q.

AU - Li, X. S.

AU - Liang, Y. F.

AU - Liao, H. B.

AU - Liu, C. X.

AU - Liu, F.

AU - Liu, H. M.

AU - Liu, J. B.

AU - liu, J. P.

AU - Liu, R. G.

AU - Liu, Z. A.

AU - Liu, Z. X.

AU - Lu, F.

AU - Lu, G. R.

AU - Lu, J. G.

AU - Luo, C. L.

AU - Luo, X. L.

AU - Mag, F. C.

AU - Ma, J. M.

AU - Ma, L. L.

AU - Ma, Q. M.

AU - Ma, X. Y.

AU - Mao, Z. P.

AU - Mo, X. H.

AU - Nie, J.

AU - Nie, Z. D.

AU - Peng, H. P.

AU - Qi, N. D.

AU - Qian, C. D.

AU - Qin, H.

AU - Qiu, J. F.

AU - Ren, Z. Y.

AU - Rong, G.

AU - Shan, L. Y.

AU - Shang, L.

AU - Shen, D. L.

AU - Shen, X. Y.

AU - Sheng, H. Y.

AU - Shi, F.

AU - Shi, X.

AU - Sun, H. S.

AU - Sun, S. S.

AU - Sun, Y. Z.

AU - Sun, Z. J.

AU - Tang, X.

AU - Tao, N.

AU - Tian, Y. R.

AU - Tong, G. L.

AU - Wang, D. Y.

AU - Wang, J. Z.

AU - Wang, K.

AU - Wang, L.

AU - Wang, L. S.

AU - Wang, M.

AU - Wang, P.

AU - Wang, P. L.

AU - Wang, S. Z.

AU - Wang, W. F.

AU - Wang, Y. F.

AU - Wang, Z.

AU - Wang, Z. Y.

AU - Wei, C. L.

AU - Wei, D. H.

AU - Wu, N.

AU - Wu, Y. M.

AU - Xia, X. M.

AU - Xie, X. X.

AU - Xing, B.

AU - Xu, G. F.

AU - Xu, H.

AU - Xu, Y.

AU - Xue, S. T.

AU - Yan, M. L.

AU - Yang, F.

AU - Yang, H. X.

AU - Yang, J.

AU - Yang, S. D.

AU - Yang, Y. X.

AU - Ye, M.

AU - Ye, M. H.

AU - Ye, Y. X.

AU - Yi, L. H.

AU - Yi, Z. Y.

AU - Yu, C. S.

AU - Yu, G. W.

AU - Yuan, C. Z.

AU - Yuan, J. M.

AU - Yuan, Y.

AU - Yue, Q.

AU - Zang, S. L.

AU - Zeng, Y.

AU - Zhang, B. X.

AU - Zhang, B. Y.

AU - Zhang, C. C.

AU - Zhang, D. H.

AU - Zhang, H. Y.

AU - Zhang, J.

AU - Zhang, J. Y.

AU - Zhang, J. W.

AU - Zhang, L. S.

AU - Zhang, Q. J.

AU - Zhang, S. Q.

AU - Zhang, X. M.

AU - Zhang, X. Y.

AU - Zhang, Y. J.

AU - Zhang, Y. Y.

AU - Zhang, Y.

AU - Zhang, Z. P.

AU - Zhang, Z. Q.

AU - Zhao, D. X.

AU - Zhao, J. B.

AU - Zhao, J. W.

AU - Zhao, M. G.

AU - Zhao, P. P.

AU - Zhao, W. R.

AU - Zhao, X. J.

AU - Zhao, Y. B.

AU - Zheng, H. Q.

AU - Zheng, J. P.

AU - Zheng, L. S.

AU - Zheng, Z. P.

AU - Zhong, X. C.

AU - Zhou, B. Q.

AU - Zhou, G. M.

AU - Zhou, L.

AU - Zhou, N. F.

AU - Zhu, K. J.

AU - Zhu, Q. M.

AU - Zhu, Y. C.

AU - Zhu, Y. S.

AU - Zhu, Y.

AU - Zhu, Z. A.

AU - Zhuang, B. A.

AU - Zou, B. S.

PY - 2004/9/2

Y1 - 2004/9/2

N2 - The absolute branching fractions for the decays D0→K -e+νe and D0→π -e+νe are determined using 7584±198±341 singly tagged D̄0 sample from the data collected around 3.773 GeV with the BES-II detector at the BEPC. In the system recoiling against the singly tagged D̄0 meson, 104.0±10.9 events for D0→K-e +νe and 9.0±3.6 events for D 0→π-e+νe decays are observed. Those yield the absolute branching fractions to be BF(D 0→K-e+νe)=(3.82±0. 40±0.27)% and BF(D0→π-e+ν e)=(0.33±0.13±0.03)%. The vector form factors are determined to be |f+K(0)|=0.78±0.04±0.03 and |f+π(0)|=0.73±0.14±0.06. The ratio of the two form factors is measured to be |f+π(0)/f +K(0)|=0.93±0.19±0.07.

AB - The absolute branching fractions for the decays D0→K -e+νe and D0→π -e+νe are determined using 7584±198±341 singly tagged D̄0 sample from the data collected around 3.773 GeV with the BES-II detector at the BEPC. In the system recoiling against the singly tagged D̄0 meson, 104.0±10.9 events for D0→K-e +νe and 9.0±3.6 events for D 0→π-e+νe decays are observed. Those yield the absolute branching fractions to be BF(D 0→K-e+νe)=(3.82±0. 40±0.27)% and BF(D0→π-e+ν e)=(0.33±0.13±0.03)%. The vector form factors are determined to be |f+K(0)|=0.78±0.04±0.03 and |f+π(0)|=0.73±0.14±0.06. The ratio of the two form factors is measured to be |f+π(0)/f +K(0)|=0.93±0.19±0.07.

UR - https://www.scopus.com/pages/publications/4143123373

U2 - 10.1016/j.physletb.2004.07.004

DO - 10.1016/j.physletb.2004.07.004

M3 - 文章

AN - SCOPUS:4143123373

SN - 0370-2693

VL - 597

SP - 39

EP - 46

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -

Direct measurements of the branching fractions for D⁰ → K^-e⁺ν_e and D⁰ → π^-e⁺ν_e and determinations of the form factors f₊^K(0) and f₊^π(0)

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