revert reasonable Ranges() of signal integral

Author: lubynets

PWGHF/D2H/Macros/HFInvMassFitter.cxx

@@ -275,7 +275,7 @@ void HFInvMassFitter::doFit()
     calculateBackground(mBkgYield, mBkgYieldErr); // BG's absolute integral in "bkg" range
 
     std::cout << "estimatedSignal = " << estimatedSignal << "\n";
-    const ParameterRanges rooNSgnParamRanges{0.1 * estimatedSignal, 20 * estimatedSignal, estimatedSignal};
+    const ParameterRanges rooNSgnParamRanges{0.5 * estimatedSignal, 2 * estimatedSignal, estimatedSignal};
     mRooNSgn = new RooRealVar("mNSgn", "number of signal", randomizeInitialParameter(rooNSgnParamRanges), rooNSgnParamRanges.lower, rooNSgnParamRanges.upper); // estimated signal yield
     if (mFixedRawYield > 0) {
       mRooNSgn->setVal(mFixedRawYield); // fixed signal yield