Abstract
It has been known for many years that there is a CP-conserving component for the decay mode KL → π0e+e- and that its magnitude can be obtained from a measurement of the amplitudes in the KL → π0γγ decay mode. We point out that the usual description of the latter in terms of a single parameter av is not sufficient to extract the former in a model independent manner. We further show that there exist known physics contributions to KL → π0γγ that cannot be described in terms of the single parameter av. We conclude that a model independent analysis requires the experimental extraction of three parameters.
| Original language | English |
|---|---|
| Article number | 094008 |
| Journal | Physical Review D |
| Volume | 64 |
| Issue number | 9 |
| Publication status | Published - 1 Nov 2001 |
| Externally published | Yes |
Cite this
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KL → π0γγ and the bound on the CP-conserving KL → π0e+e-. / Gabbiani, F.; Valencia, G.
In: Physical Review D, Vol. 64, No. 9, 094008, 01.11.2001.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - KL → π0γγ and the bound on the CP-conserving KL → π0e+e-
AU - Gabbiani, F.
AU - Valencia, G.
PY - 2001/11/1
Y1 - 2001/11/1
N2 - It has been known for many years that there is a CP-conserving component for the decay mode KL → π0e+e- and that its magnitude can be obtained from a measurement of the amplitudes in the KL → π0γγ decay mode. We point out that the usual description of the latter in terms of a single parameter av is not sufficient to extract the former in a model independent manner. We further show that there exist known physics contributions to KL → π0γγ that cannot be described in terms of the single parameter av. We conclude that a model independent analysis requires the experimental extraction of three parameters.
AB - It has been known for many years that there is a CP-conserving component for the decay mode KL → π0e+e- and that its magnitude can be obtained from a measurement of the amplitudes in the KL → π0γγ decay mode. We point out that the usual description of the latter in terms of a single parameter av is not sufficient to extract the former in a model independent manner. We further show that there exist known physics contributions to KL → π0γγ that cannot be described in terms of the single parameter av. We conclude that a model independent analysis requires the experimental extraction of three parameters.
UR - http://www.scopus.com/inward/record.url?scp=37649026408&partnerID=8YFLogxK
M3 - Article
VL - 64
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 9
M1 - 094008
ER -