Open AccessMeasurement of with NA48/2 at CERN
Author(s) -
G. Khoriauli
Publication year - 2017
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/800/1/012035
Subject(s) - large hadron collider , chiral perturbation theory , physics , positron , branching (polymer chemistry) , nuclear physics , radiative transfer , branching fraction , electron , phase space , particle physics , optics , materials science , quantum mechanics , pion , composite material
The exclusive branching ratio of the radiative decay is measured using data collected by the NA48/2 experiment at CERN in 2003-2004. The measurement is performed in the phase-space region of the mass of the electron-positron pair, . This is the most accurate measurement of the exclusive . The result, is compatible with the theoretical value, 8.51 × 10(−)(8), calculated using the Chiral Perturbation Theory framework at next-to-leading order