Projects per year
Abstract
The NA48/2 experiment at CERN collected two data samples with minimum bias trigger conditions in 2003 and 2004. A measurement of the rate and dynamic properties of the rare decay K±→π±γγ from these data sets based on 149 decay candidates with an estimated background of 15.5±0.7 events is reported. The model-independent branching ratio in the kinematic range z=(mγγ/mK)2>0.2 is measured to be BMI(z>0.2)=(0.877±0.089)×10−6, and the branching ratio in the full kinematic range assuming a particular Chiral Perturbation Theory description to be B(Kπγγ)=(0.910±0.075)×10−6.
Original language | English |
---|---|
Pages (from-to) | 141-148 |
Journal | Physics Letters B |
Volume | 730 |
Early online date | 23 Jan 2014 |
DOIs | |
Publication status | Published - 1 Mar 2014 |
Bibliographical note
A revised version accepted for publication by Physics Letters BKeywords
- hep-ex
Fingerprint
Dive into the research topics of 'A new measurement of the K ±→π±γγ decay at the NA48/2 experiment'. Together they form a unique fingerprint.Projects
- 2 Finished
-
-
Responsive RA submission for a "New measurement of the ratio Gamma(K->e nu)/Gamma(K->mu nu) at NA48/2"
Lazzeroni, C. & Watkins, P.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/04/08 → 31/03/11
Project: Research Councils