A possible experimental determination of ms / ˆm from Kµ4 decays
نویسندگان
چکیده
A possible experimental determination of m s / ˆ m from K µ4 decays Abstract Kπ scattering and K µ4 decays are studied at leading order of improved chiral perturbation theory. It is shown that high precision K µ4 experiments at, e.g., DAΦNE should allow for a direct measurement of the quark mass ratio m s / ˆ m.
منابع مشابه
Studies of Three-Body B^+→D ̅^* 〖(2007)〗^0 K^+ K ̅^0 and B^0→D^* 〖(2010)〗^- K^+ K ̅^0 Decays
We analyze three-body decays of and . Under the factorization approach, there are tree level diagrams for these decay modes and the transition matrix element of decay is factorized into a form factor multiplied by decay constant and form factor multiplied into weak vertices form factor. The transition matrix element of decay is also factorized into a form factor multiplied into weak vertic...
متن کاملResummation of running coupling effects in semileptonic B meson decays and extraction of ||Vcb||
We present a determination of |Vcb| from semileptonic B decays that includes resummation of supposedly large perturbative corrections, originating from the running of the strong coupling. We argue that the low value of the BLM scale found previously for inclusive decays is a manifestation of the renormalon divergence of the perturbative series starting already in third order. A reliable determi...
متن کاملExperimental determination of Vus from kaon decays
The status of the experimental determination of V us from K 3 and K µ2 decays is reviewed. Factors currently limiting the precision of the evaluation of V us from kaon decays and prospects for new measurements within the next few years are discussed.
متن کامل|Vcb| from inclusive semileptonic B decays
We determine |Vcb| from inclusive semileptonic B decays including resummation of supposedly large perturbative corrections, which originate from the running of the strong coupling. We argue that the low value of the BLM scale found previously for inclusive decays is a manifestation of the renormalon divergence of the perturbative series starting already in third order. A reliable determination ...
متن کاملDESY 95-148 UdeM-GPP-TH-95-32 CP Violation and Flavour Mixing in the Standard Model
We review and update the constraints on the parameters of the quark avour mixing matrix VCKM in the standard model and estimate the resulting CP asymmetries in B decays, taking into account recent experimental and theoretical developments. In performing our ts, we use inputs from the measurements of the following quantities: (i) j j, the CP-violating parameter in K decays, (ii) Md, the mass di ...
متن کامل