| Title: |
Direct Measurement of the Pseudoscalar Decay Constant, fDs |
| Authors: |
Bai, JZ; Bardon, O; Blum, I; Breakstone, A; Burnett, T; Chen, GP; Chen, HF; Chen, J; Chen, SJ; Chen, SM; Chen, Y; Chen, YB; Chen, YQ; Cheng, BS; Cowan, RF; Cui, HC; Cui, XZ; Ding, HL; Du, ZZ; Dunwoodie, W; Fan, XL; Fang, J; Fero, M; Gao, CS; Gao, ML; Gao, SQ; Gao, WX; Gratton, P; Gu, JH; Gu, SD; Gu, WX; Gu, YF; Guo, YN; Han, SW; Han, Y; Harris, FA; Hatanaka, M; He, J; He, KR; He, M; Hitlin, DG; Hu, GY; Hu, HB; Hu, T; Hu, XQ; Huang, DQ; Huang, YZ; Izen, JM; Jia, QP; Jiang, CH; Jin, Y; Jones, L; Kang, SH; Kelsey, MH; Kim, BK; Lai, YF; Lan, HB; Lang, PF; Lankford, A; Li, F; Li, J; Li, PQ; Li, Q; Li, RB; Li, W; Li, WD; Li, WG; Li, X; Li, XN; Lin, SZ; Liu, HM; Liu, JH; Liu, Q; Liu, RG; Liu, Y; Liu, ZA; Lou, XC; Lowery, B; Lu, JG; M., A; C., E; M., J; Mao, HS; Mao, ZP; Malchow, R; Mandelkern, M; Meng, XC; Ni, HL; Nie, J; Olsen, SL; Oyang, J; Paluselli, D; Pan, LJ; Panetta, J; Porter, F; Prabhakar, E; Qi, ND; Que, YK; Quigley, J; Rong, G |
| Source: |
Physical Review Letters, vol 74, iss 23 |
| Publisher Information: |
eScholarship, University of California |
| Publication Year: |
1995 |
| Collection: |
University of California: eScholarship |
| Subject Terms: |
5106 Nuclear and Plasma Physics (for-2020); 5107 Particle and High Energy Physics (for-2020); 4902 Mathematical Physics (for-2020); 49 Mathematical Sciences (for-2020); 51 Physical Sciences (for-2020); Brain Disorders (rcdc); Down Syndrome (rcdc); Intellectual and Developmental Disabilities (IDD) (rcdc); 01 Mathematical Sciences (for); 02 Physical Sciences (for); 09 Engineering (for); General Physics (science-metrix); 40 Engineering (for-2020) |
| Time: |
4599 - 4602 |
| Description: |
The Beijing Spectrometer (BES) experiment has observed purely leptonic decays of the Ds meson in the reaction e+e-→Ds+Ds- at a c.m. energy of 4.03 GeV. Three events are observed in which one Ds decays hadronically to φπ, K¯*0K, or K¯0K, and the other decays leptonically to μνμ or τντ. With the assumption of μ-τ universality, values of the branching fraction, B(Ds→μνμ)=(1.5-0.6-0.2+1.3+0.3)%, and the Ds pseudoscalar decay constant, fDs=(4.3-1.3-0.4+1.5+0.4)×102 MeV, are obtained. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
qt3637r7f6; https://escholarship.org/uc/item/3637r7f6; https://escholarship.org/content/qt3637r7f6/qt3637r7f6.pdf |
| DOI: |
10.1103/physrevlett.74.4599 |
| Availability: |
https://escholarship.org/uc/item/3637r7f6; https://escholarship.org/content/qt3637r7f6/qt3637r7f6.pdf; https://doi.org/10.1103/physrevlett.74.4599 |
| Rights: |
CC-BY |
| Accession Number: |
edsbas.6FE7713A |
| Database: |
BASE |