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Look at the subtraction method mentioned by Spiros yesterday.

Look at the subtraction method mentioned by Spiros yesterday. The idea (if I well understood) is to : Plot the inv. Mass for L>0 (or L/dL>0) Plot the inv. Mass for L<0 (or L/dL<0) Do the subtraction of the 2 plots I looked with the K0s sample Each plot has : Left picture :

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Look at the subtraction method mentioned by Spiros yesterday.

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  1. Look at the subtraction method mentioned by Spiros yesterday. • The idea (if I well understood) is to : • Plot the inv. Mass for L>0 (or L/dL>0) • Plot the inv. Mass for L<0 (or L/dL<0) • Do the subtraction of the 2 plots • I looked with the K0s sample • Each plot has : • Left picture : • Red points for L/dL >0 • Black line for L/dL<0 • Right picture : the difference btw the 2 histograms

  2. L/dL>0

  3. L/dL>1 (then L/dL<-1)

  4. L/dL>2 (then L/dL<-2)

  5. L/dL>4 (then L/dL<-4)

  6. L/dL>5 (then L/dL<-5)

  7. L/dL>7 (then L/dL<-7)

  8. L/dL>8 (then L/dL<-8)

  9. L/dL>10 (then L/dL<-10)

  10. L/dL>15 (then L/dL<-15)

  11. comments • Until L/dL >5, the background line is always above the ‘signal’ • Up to L/dL>2, a K0s mass peak is seen • It is interesting that when increasing this cut, the negative part (L/dL<0) could be ‘natural’ background since it fits the signal part

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