New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio

Details New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio

2003-05-16

arxiv.org/abs/hep-ex/0305042v3

Phys.Rev.Lett.91:261802,2003

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 5 figures; final version accepted by PRL

Scientific paper

10.1103/PhysRevLett.91.261802

E865 at the Brookhaven National Laboratory AGS collected about 70,000 K+(e3) events with the purpose of measuring the relative K+(e3) branching ratio. The pi0 in all the decays was detected using the e+e- pair from pi0 -> e+e-gamma decay and no photons were required. Using the Particle Data Group branching ratios for the normalization decays we obtain BR(K+(e3(gamma))=(5.13+/-0.02(stat)+/-0.09(sys)+/-0.04(norm))%, where $K+(e3(gamma)) includes the effect of virtual and real photons. This result is 2.3 sigma higher than the current Particle Data Group value. The implications of this result for the $V_{us}$ element of the CKM matrix, and the matrix's unitarity are discussed.

Affiliated with

Also associated with

No associations

Rating

New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-545351