Study On The Decay Of Kl To Pi0 Gamma Gamma PDF Download

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Study of the Rare Decay K(L) ---] Pi0 Gamma Gamma at KTeV.

Study of the Rare Decay K(L) ---] Pi0 Gamma Gamma at KTeV.
Author:
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Total Pages: 132
Release: 2007
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The authors study on the rare decay K{sub L} 2![pi]°[gamma][gamma], measure a{sub V}, and branching ratio by analyzing 96, 97 and 99 data. The measurements were taken by KTeV at Fermi National Accelerator Laboratory. After all cuts, they have 1982 K{sub L} 2![pi]°[gamma][gamma] candidate. The background level is estimated as 30%. K{sub L} 2![pi]°[gamma][gamma] branching ratio is measured as (1.29 ± 0.03(stat) ± 0.04(sys)) x 10−6. By using D'Ambrosio's theory to fit a{sub V}, a{sub V} = -( -0.31 ± 0.05(stat) ± 0.07(sys)).

Study of the K to Pi Pi0 Gamma Decays at the NA48/2 Experiment at the CERN SPS

Study of the K to Pi Pi0 Gamma Decays at the NA48/2 Experiment at the CERN SPS
Author: Silvia Goy López
Publisher:
Total Pages: 201
Release: 2006
Genre:
ISBN:
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The NA48/2 experiment at the CERN SPS has collected a large sample of K to pi pi0 gamma decays.Two amplitudes contribute to these decays. The dominant one comes from Inner Bremsstrahlung (IB) in the K to pi pi0 process. The second one is given by the Direct Emission (DE) of the photon at the weak vertex from an intermediate state of the decay. The simplest radiative transitions are electric dipole (E1) and magnetic dipole (M1). Electric amplitudes can interfere with IB, and CP violation and possible non-SM effects can show up in th e corresponding interference (INT) term.In this work a sub sample of the data has been analyzed. About 120000 K to pi pi0 gamma decays, with negligible background contamination have been reconstructed in the ranges 0.2