K+ -> pi0 e+ nu branching ratio from E865

Details K+ -> pi0 e+ nu branching ratio from E865 K+ -> pi0 e+ nu branching ratio from E865

2004-05-14

arxiv.org/abs/hep-ex/0405036v1

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 4 figures, Contribution to the Proceeding of the XXXIX Rencontres de Moriond on Electroweak Interactions and Unified

Scientific paper

E865 at the Brookhaven National Laboratory AGS collected about 70,000 K+(e3) events to measure the K+(e3) branching ratio relative to the observed K+ -> pi+ pi0, K+ -> pi0 mu+ nu, and K+ -> pi+ pi0 decays. 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

K+ -> pi0 e+ nu branching ratio from E865 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 K+ -> pi0 e+ nu branching ratio from E865, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and K+ -> pi0 e+ nu branching ratio from E865 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-230701