h1. Tracker Software Review: Meeting 8

h2. November 1, 2017: 1400 GMT

h2. Agenda

1. *Actions from previous meetings*

* *PR*:

### AD: Optimize Chi2 cut for “MINUIT” variant

### AD, CH: Check and implement MCS errors

### AD: Plot chisq per dof for 'perfect' events

### AD, KL: Define multi-track requirements

* *Track fit*:

### Investigate whether field integration (e.g. using Runge Kutta) is required to compensate for magnetic field non-uniformity

### Make study of magnetic-field alignment with a view to establishing whether the present algorithm is sufficiently insensitive to reasonable assumptions of maximum field-misalignment

### Study p-value: split up contributions to p-value shape using MC and study shape in data, e.g. is there an error in the resolution per plane, handling of MCS, handing of energy loss, b field..

2. *Recent issues*:

## 50 MeV bump -- more pronounced with MINUIT? 

## CR reports lower downstream efficiency, and fewer events in analysis when using MINUIT. Should MINUIT continue to be the default fitter in MAUS?

3. *PR Report*: A. Dobbs

4. *Track fit Report*: C. Hunt

5. *Next Steps for review*

6. *AoB*

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h2. Dial-in information

http://mice.iit.edu/phonebridge.html

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