Электронный каталог

Статья

Ablikim, M.
Improved Measurement of the Branching Fraction of D*+&sub(s)*>*m*+*n&sub(*m) / M.Ablikim, O.Bakina, I.Boyko, G.Chelkov, D.Dedovich, I.Denysenko, P.Egorov, A.Guskov, Y.Nefedov, S.Pogodin, A.Sarantsev, A.Zhemchugov, [a.o.] // Physical Review D [Electronic resource]. – 2023. – Vol.108, No.11. – P.112001. – URL: https://doi.org/10.1103/PhysRevD.108.112001. – Bibliogr.:51.

Using e+e− collision data with an integrated luminosity of 7.33  fb−1 collected at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector operating at the BEPCII collider, the branching fraction of the leptonic decay D+s→μ+νμ is measured to be (0.5294±0.0108stat±0.0085syst)%. Based on this, the product of the D+s decay constant fD+s and the magnitude of the c→s quark mixing matrix element |Vcs| is determined to be fD+s|Vcs|=241.8±2.5stat±2.2syst  MeV. Using the value of |Vcs| given by the global standard model fit, fD+s is found to be 248.4±2.5stat±2.2syst  MeV. Alternatively, using the value of fD+s from a recent lattice quantum chromodynamics calculation, |Vcs| is determined to be 0.968±0.010stat±0.009syst.



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 332.7 - Встречные е+е- и мю+мю- пучки