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Measurement of the ratio Γ (KL → π+ π-) / Γ (KL → π± e∓ ν) and extraction of the CP violation parameter | η+ - |

Abstract:

We present a measurement of the ratio of the decay rates Γ (KL → π+ π-) / Γ (KL → π± e∓ ν), denoted as ΓK 2 π / ΓK e 3. The analysis is based on data taken during a dedicated run in 1999 by the NA48 experiment at the CERN SPS. Using a sample of 47 000 K2 π and five million Ke 3 decays, we find ΓK 2 π / ΓK e 3 = (4.835 ± 0.022stat . ± 0.016syst .) × 10-3. From this we derive the branching ratio of the CP violating decay KL → π+ π- and the CP violation parameter | η+ - |. Excluding the CP conse...

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Authors


Dosanjh, RS More by this author
Gershon, TJ More by this author
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Journal:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume:
645
Issue:
1
Pages:
26-35
Publication date:
2007-02-01
DOI:
ISSN:
0370-2693
URN:
uuid:1f13eb83-a15f-4c8a-9681-4bc109b8f8f1
Source identifiers:
345291
Local pid:
pubs:345291
Language:
English
Keywords:

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