ksamdev/bsm_analyze — Issue #34: Chi2 reconstruction
Author: ksamdev
Created: 2012-03-06 04:38:14+00:00
State: open

Use two discriminators in the reconstruction: leptonic and hadronic. Both should be minimzed for the best hypothesis.

**Note**: _The original implementation has min leptonic discriminator: deltaR(ltop, lepton) + deltaR(ltop, jet) + deltaR(ltop, nu) - and max hadronic discriminator: deltaR(ltop, htop)_

The new discriminators are represented by Chi2 on each side as follows:

**leptonic**

chi2 = [(Mtop - 173) / sigma_ltop] ^ 2 + [(deltaRsum_ltop - ) / sigma_deltaRsum_ltop] ^ 2

**hadronic**

chi2 = [(Mtop - 173) / sigma_htop] ^ 2 + [(deltaRsum_htop - ) / sigma_deltaRsum_htop] ^ 2 + [(|delta_phi| - pi) / sigma_delta_phi] ^ 2

**Note**: *deltaRsum_htop should be calculated for htops with 2+ jets. It is equal to zero for htop with 1 jet*