A Study of Quark Fragmentation using Kaons Produced in Association with Prompt Ds±/D± Mesons
Primary Authors: Niharika Ranjan, Matthew Jones
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Impact parameter distribution of secondary Ds±/D± in Monte Carlo
An important step in the analysis is the separation of the prompt and secondary Ds±/D± components. The two components are separated statistically by performing a likelihood fit using probability density functions to describe the shapes of the prompt and secondary components in the KKπ impact parameter distribution (d0).
For extracting the shape of the secondary component in the d0 distribution, we study Monte Carlo samples of secondary Ds±/D± produced in B-decays, which are generated using the full CDF detector and trigger simulation.
We fit the impact parameter distribution of the secondary Ds±/D± mesons using a sum of two exponential functions:
The d0 distribution of the secondary Ds±/D± (in Monte Carlo samples) and the fit projections are shown below:
The secondary d0 templates obtained from the Monte Carlo samples (convoluted with the prompt d0 resolution function) are used to describe the shape of the secondary Ds±/D± component in the KKπ impact parameter distribution in data.
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