Recent Na48 Results on Semileptonic and Rare Kaon Decays. Measurement of V Us
نویسنده
چکیده
The new results of investigation of K 0 L e3 and K ± e3 decays performed by NA48 Collaboration are presented. The measured branching fractions are used to extract V us. The values of Ke3 form-factors and radiative K 0 L e3γ branching ratio are reported. A list of recent NA48 results concerning some rare neutral kaon decays is given.
منابع مشابه
New results on kaon decays from NA48
We report on recent results on rare and semileptonic kaon decays from NA48 and NA48/2. Using data from a minimum bias run in 1999 we present a new measurement of the CP violating decay KL → π π with over 40000 selected events. We measured the ratio Γ(KL → π π)/Γ(KL → π eν) = (4.835± 0.038)×10 leading to the precise determination of the CP violation parameter |η+ −| = (2.223±0.013)×10 −3 . From ...
متن کاملNew Na48 Results on Kaon and Hyperon Decays
The NA48 Collaboration has obtained several new results on kaon and neutral hyperon decays. For hyperons we present new, very precise measurements on the Ξ lifetime and the decay asymmetries of Ξ → Λγ and Ξ → Σγ. On kaon decays, we report on the first observation of the interference term between Inner Bremsstrahlung and Direct Emission in K± → π±π0γ and on a new, accurate measurement of the for...
متن کاملPrecision tests of the Standard Model with leptonic and semileptonic kaon decays
This paper presents the analysis of leptonic and semileptonic kaon decays data done by the FlaviaNet Kaon Working group, as described in [1]. Data include all recent results by BNL-E865, KLOE, KTeV, ISTRA+, and NA48. Experimental results are critically reviewed and combined, taking into account theoretical (both analytical and numerical) constraints on the semileptonic kaon form factors. We rep...
متن کاملRecent results of the NA48/2 experiment
The NA48/2 experiment at CERN SPS has collected the world largest amount of charged kaon decays. During two runs in 2003 and 2004, with about 60 days of effective running each, about 18·109 events were recorded in total. The main goal of NA48/2 was the search for direct CP violation in K± decays into three pions. However, given the high statistics achieved, many other physics topics were also c...
متن کاملResults on charged kaon and hyperon decays from NA 48
Recent results from the NA48/1 and NA48/2 experiments at the CERN SPS are presented. NA48/2 carried out data taking in 2003 and 2004 collecting charged kaon decays: branching ratios and form factors have been measured for the rare K→πee, K→πγγ and K→πeeγ decays. The NA48/1 experiment has taken data in 2002 using only the KS beam at an increased intensity measuring neutral hyperon radiative deca...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005