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Aneela Amin, Haris Rashid, Talab Hussain
Centre for High Energy Physics, University of the Punjab, Lahore, Pakistan Charmonium Group Meeting, April 17, 2019
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Outline Overview Motivation Data Analysis Results Conclusions
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Motivation In this study we searched isospin and strangeness violating decay, which is highly suppressed but kinematically it is possible. To find any hint beyond the Standard Model of Particle Physics. This work is based upon the analysis of and try to measure its branching fraction using the large statistics at BESIII.
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Initial Events Selection
Charged tracks 4 good tracks and |cos|<0.93. Qi=0 PID dE/dx and TOF information are combined to identify particles. Pt > 0.5
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Selection of after Vertex Fitting
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Selection of after Kinematic Fitting
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Optimized 2 MC Data
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Optimized 2
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Final Event Selection
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Final selection criteria
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Invariant mass of MC & Data after selection criteria
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Inclusive Backgrounds
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Inclusive Background Cont…
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Inclusive Background To suppress the channel use Data
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Inclusive Background To suppress the channel use
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Inclusive Background To suppress the channel use
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Inclusive Background To suppress the channel use
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Inclusive Background To suppress the channel use
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Inclusive Background To suppress the channel use
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Inclusive Background To suppress the channel use
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Inclusive Background To suppress the channel use
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Inclusive Background To suppress the channel use
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Inclusive Background To suppress the channel use
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Inclusive Background To suppress the channel use
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Exclusive Background To suppress the channel use
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Exclusive Background To suppress the channel use
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Exclusive Background To suppress the channel use
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Exclusive Background To suppress the channel use
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Exclusive Background To suppress the channel use
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Cont…
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Initial Events Selection
4 good tracks and |cos|<0.93. Qi=0 PID dE/dx and TOF information are combined to identify particles. Pt > 0.5
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Selection of after Vertex Fitting
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Selection of after Vertex Fitting
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Selection of after Kinematic Fitting
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Optimized 2
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Optimized 2
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Invariant mass of MC & Data after selection criteria
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Cont…
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Thanks
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Distribution of Signal
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Distribution of Signal for
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