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bool FitHelixMinuit(const std::vector<double>& x, const std::vector<double>& y,
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const std::vector<double>& z, const double* pStart,
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MAUS::SimpleHelix& helix, int handedness = 0, double cut = -1.0);
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* @param[in] pStart 4D double array holding xc, yx, radius, dsdz_initial_seed
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double LocateGlobalChiSqMinimum(const double* pStart, int handedness, double cut,