2022-12-202022-12-202019-02-22Ablikim, M. vd. (2019). ''Determination of the pseudoscalar decay constant f(Ds)(+) via D-s(+) -> mu(+)nu(mu)''. Physical Review Letters, 122(7).0031-90071079-7114https://doi.org/10.1103/PhysRevLett.122.071802https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.122.071802http://hdl.handle.net/11452/29977Çalışmada 455 yazar bulunmaktadır. Bu yazarlardan sadece Bursa Uludağ Üniversitesi mensuplarının girişleri yapılmıştır.Using a 3.19 fb(-1) data sample collected at an e(+)e(-) center-of-mass energy of E-cm = 4.178 GeV with the BESIII detector, we measure the branching fraction of the leptonic decay D-s(+) -> mu(+)nu(mu) to be BDs+ -> mu+nu mu = (5.49 +/- 0.16(stat) +/- 0.15(syst)) x 10(-3). Combining our branching fraction with the masses of the D-s(+) and mu(+) and the lifetime of the D-s(+), we determine f(Ds+)vertical bar V-cs vertical bar = 246.2 +/- 3.6(stat) +/- 3.5(syst) MeV. Using the c -> s quark mixing matrix element vertical bar V-cs vertical bar determined from a global standard model fit, we evaluate the D-s(+) decay constant f(Ds+) = 252.9 +/- 3.7(stat) +/- 3.6(syst) MeV. Alternatively, using the value of f(Ds+) calculated by lattice quantum chromodynamics, we find vertical bar V-cs vertical bar = 0.985 +/- 0.014(stat) +/- 0.014(syst). These values of BDs+ -> mu+nu mu, f(Ds+)vertical bar V-cs vertical bar, f(Ds+) and vertical bar V-cs vertical bar are each the most precise results to date.eninfo:eu-repo/semantics/openAccessRelativistic treatmentRadiative-correctionsLattice qcdD-mesonsLightCharmMassPhysicsQuantum theoryBranching fractionsData sampleDecay constantsGlobal standardsLattice quantum chromodynamicsLeptonic decayPseudoscalar decay constantsQuark-mixing matrixGermanium compoundsArticle0004595834000042-s2.0-85062005238122730848637Physics, multidisciplinaryCP Violation; Deterioration; CKM Matrix