NMSSM qqH 1, H 1 ->a 1 a 1 -> project A. Nikitenko (CMS)
“Low fine-tuning” NMSSM points q1q1 q2q2 H1H1 a1a1 a1a1 -- ++ -- h+h+ -- ++ -- h+h+ R. Dermisek and J.F. Gunion See in CPNSH group report hep-ph/ This point is taken for first MC analysis with 4 -> jj final state. qqH 1, H 1 ->A 1 A 1 ->4 M H1 =105 GeV M A1 =5.3 GeV
Muon from -> is soft and non isolated: it is inside jet from other ->hadrons decay => need low p T non isolated di-muon trigger q1q1 q2q2 H1H1 a1a1 a1a1 -- ++ -- h+h+ -- ++ -- h+h+ 1 and 3 prong taus qqH 1, H 1 ->a 1 a 1 ->4 M H1 =105 GeV M A1 =5.3 GeV
HLT di-muons triggers (in PTDR Vol.2) and H 1 ->2a 1 ->4 -> jj Relaxed (non-isolated) : 10,10 GeV –Signal efficiency: 2 MC p T > 10 GeV, | |<2.1 = 0.09 Isolated : 7, 7 GeV –Signal efficiency: 2 MC p T > 7 GeV, | |<2.1 = 0.16 isolation will kill signal ! –Eff. two times higher, but isolation will kill signal ! DAQTDRplot Di-muon HLT rate at 2 x cm -2 s -1 L3 rate of non isolated di- trigger at 7 GeV is ~ 2 times higher (10 Hz) than isolated one (~4 Hz). 7 GeV
How to reduce rate of non-isolated, low p T di-muon trigger ? Use Same Sign non isolated di-muon trigger at p T threshold ~ 5-7 GeVUse Same Sign non isolated di-muon trigger at p T threshold ~ 5-7 GeV Rate reduction of gg->bb (MSEL=5):Rate reduction of gg->bb (MSEL=5): –R = ( + + OR - - ) / ( at p T > 5 GeV is ~ 4.0 ! evaluated with PYTHIA6.227 is ~ 4.0 ! evaluated with PYTHIA6.227 need confirmation with full simulation need confirmation with full simulation
Efficiency of “primary” selections. at particle level signal looks promising q1q1 q2q2 H1H1 a1a1 a1a1 -- ++ -- h+h+ -- ++ -- h+h+ xBr(H 1 ->a 1 a 1 ->4 -> jj)=215 fb - - j + j + + + + j - j - topology fb cut on p T p T > 7 GeVp T > 10 GeV Cumulative efficiency 2 < N trk. = Q xQ h < sel., fb 5.8 fb 5.8 fb 3.2 fb 3.2 fb SM (qqH, m H =105 GeV) = 5.4 pb, Br(H 1 ->a 1 a 1 )=0.926, Br(a 1 -> )=0.938