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Research Update May 7, 2013

Research Update May 7, 2013. We need more Kk2f (standalone) MC data to understand the magnitude and sign of the A FB . The CM energies are sqrt(s)=34.5 GeV (Expt: TASSO, published R.J. Cashmore, 1986) sqrt(s)=35 GeV (Expt: TASSO, published R.J. Braunschweig, 1986)

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Research Update May 7, 2013

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  1. Research Update May 7, 2013 • We need more Kk2f (standalone) MC data to understand the magnitude and sign of the AFB. The CM energies are • sqrt(s)=34.5 GeV (Expt: TASSO, published R.J. Cashmore, 1986) • sqrt(s)=35 GeV (Expt: TASSO, published R.J. Braunschweig, 1986) • See the plots in the next pages

  2. AFB values fors=10.58, 29, 34.5, 35 GeV

  3. AFB values for s=10.58 R1 and R6 R1 (data with Backbround) NO. NAME VALUE ERROR SIZE DERIVATIVE 1 a0 4.70349e+05 2.34420e+02 2.03056e+00 1.51587e-10 2 a1 -1.87190e+04 3.65010e+02 4.50364e+00 -2.20879e-12 3 a2 4.70109e+05 8.28597e+02 7.14239e+00 4.32948e-11

  4. Polar Angle Distribution From the MC Sample of Kk2F Generator (old) Prediction for All Processes(QED+interference+WEAK) CM=10.58GeVher=8.99 GeV ler=3.1175GeVISR+FSR are ON Prediction for only WEAK Process Prediction for only QED Process

  5. Polar Angle Distribution of the Kk2f MC data with the removal of ISR+FSR(New) CM=10.58GeVher=8.99 GeV ler=3.1175GeVISR+FSR removed10M data for all processes

  6. Polar Angle Distribution of the Kk2f MC data with the removal of ISR+FSR(old) CM=10.58GeVher=8.99 GeV ler=3.1175GeVISR+FSR removed10M data for QED processes

  7. Polar Angle Distribution of the Kk2f MC data with the removal of ISR+FSR(old) CM=10.58GeVher=8.99 GeV ler=3.1175GeVISR+FSR removed10M data for Weak processes

  8. Polar Angle Distribution From the Kk2f MC Sample when FSR is off(old) CM=10.58GeVher=8.99 GeV ler=3.1175GeVISR+FSR on10M dataAFB got from fitted value

  9. Forward Backward asymmetries from the MC Sample of Kk2F Generator Gamma, Z interference is roughly half the size of pure QED and opposite sign.

  10. Systematic Study Using Kk2F Generator old and shown before to Compare the sign and Magnitude with a published paper Prediction for All Processes@ s=29GeV The dashed line corresponds to the O(3) QED cross-section and solid line to the fitted cross section. Center of Mass is 29GeV, her=14.5 GeV and ler 14.5 GeV

  11. Forward Backward asymmetries from the MC Sample of Kk2F Generator (old and shown before)

  12. Backup: Preliminary Result of AFB @ BaBar old and shown before • -: |AFB (R1)|- |AFB (R6)| =(-1.6  0.6)10-3 • +: |AFB (R1)|- |AFB (R6)| =(-1.6  0.6)10-3 • R1: |AFB(-)|- |AFB (+)|=(9.07.1)  10-4 • R6: |AFB(-)|- |AFB (+)|=(9.03.5)  10-4 • Data • -: |AFB (R1)|- |AFB (R6)| =(-1.4  0.5)  10-3 • +:|AFB (R1)|- |AFB (R6)| =(-1.4  0.5)  10-3 • R1 MC’s: |AFB(-)|- |AFB (+)|=(2.06.6)  10-4 • R6 MC’s: |AFB(-)|- |AFB (+)|=(2.03.5)  10-4 • MC’s

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