Higgs decays to displaced leptonjets 2012 plans G

Higgs decays to displaced leptonjets: 2012 plans G. Ciapetti A. Policicchio for the LJ group

DECAY MODEL • 2011: use the simplest Lepton Jet model (2 d final state; d µ µ) to tune the analysis. • 2012: extend the analysis to more complex Lepton Jets configurations (4 d final state) and increase the signal acceptance (in 2011: trigger~2 % cut flow ~5% of the trigger). MODEL PARAMETERS - mh = 100 / 140 Ge. V - mfd 2 = 5 Ge. V - msd 1 = 2 Ge. V - m. LSP = 2 Ge. V - mγd = 400 Me. V - BR(γd → ee) = 45% - BR(γd → μμ) = 45% - BR(γd →ππ) = 10% - cτ(γd) = 78. 8 / 59. 7 mm

Analysis strategy (1) • Use 2011 data sample and 200 K samples from MC 11 b at 7 Te. V (m. Higgs =100, 140 Ge. V) for analysis setup. Final analysis on 8 Te. V full data sample (end 2012). • Trigger: 3 mu 6_MSonly OR 2 mu 6_MSonly_g 10_loose OR j 35_a 4 tc_EFFS_L 1 TAU_HVtrk Total 13% 8% Trigger results from full detector simulation Following plots are at MC truth level for events accepted by the trigger

Analysis strategy (2) • • The two hidden scalars Sd 1 are back to back DR between the two d from the same Sd 1 is < 0. 6 mhiggs 100 Ge. V 0. 6 DR between the two scalars Sd 1 DR between two d

Analysis strategy (3) • The DR between the two leptons from the same d is <0. 15 mhiggs 100 Ge. V DR between the two leptons from the same d

4 µ Lepton Jet m DR=0. 6 DR=0. 15 d Sd 1 d m

2 µ - 2 e Lepton Jet m DR=0. 6 DR=0. 15 d e e Sd 1 d m

Analysis strategy (4) From 2011 analysis: request of two 2 µ pairs (isolation) back to back kills background • LJ definition: 2µ and >=3 µ OR 2 e (inside the HCAL) q >= 3 µ Msonly pt>4 Ge. V , charge=0/1, DR < 0. 6 + (isolation in ID? ) q 2 µ Msonly pt>4 Ge. V , tot charge=0, DR < 0. 15 + (isolation in ID) and 1 jet Et > 10 Ge. V, log(HCAL/ECAL) > 1. x DR (respect 2 µ )<0. 6 All muons with d 0, z 0 < 200 mm respect to primary vertex Select events with 2 LJ with DR > 2 Overall acceptance 5% of trigger