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6/26/09

6/26/09. First Attempt. 8/13/09. mSUGRA base point (modified from the 0802.2968 paper) m 0 =250 GeV ; m 1/2 =350 GeV ; tan b =40 ; A 0 =0 ; m >0 Ngen = 200,000 events 1) M( c 2 0 ) - M( c 1 0 )  M( tt ) endpoint ~ 124 GeV for the 2) M( t 1 +/- ) - M( c 1 0 ) ~ 49 GeV .

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6/26/09

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  1. 6/26/09

  2. First Attempt 8/13/09 mSUGRA base point (modified from the 0802.2968 paper) m0=250 GeV ; m1/2=350 GeV ; tanb=40 ; A0=0 ; m>0 Ngen = 200,000 events1) M(c20) - M(c10)  M(tt) endpoint ~ 124 GeV for the 2) M(t1+/-) - M(c10) ~ 49 GeV. Leshouches spectrum and decay file by Shpeno: ("Spheno_Bhaskarscenario.spc") Cross section = about 7pb (200,000 events  about 30fb-1 Event Selections N(hadronictau’s) >= 2 (1) for di-tau (tau-muon) case With pTvis > 40 and 20 GeV and |h| < 2.5 N(j) >= 2 with withpT > 10 GeV and |h| < 2.5 tau detection efficiency of 90% ; fake jet rate of 5% MET > 180 GeV sum of E_T's of two first Jets and MET > 400 GeV muons with pT > 1 GeV (no isolation cut)

  3. 8/13/09 No LFV di-tau_diff 1a 1b OS Di-tau LS OS-LS LS OS End Point ~ 124 GeV 2a 2b tau-muon_diff tau-muon [Q1] Is the 2nd bump real effect?

  4. 8/13/09 LFV 2a OS-LS LFV_di-tau [Q2] The blue curve is from “1b”. This mass distribution should be the same as “2a”. But not… Why? 3a OS-LS OS-LS LFV_LFV_tau-muon_diff LFV_tau-muon_diff

  5. Proposed Changes (in red) 8/14/09 mSUGRA base point (modified from the 0802.2968 paper) m0=250 GeV ; m1/2=350 GeV ; tanb=40 ; A0=0 ; m>0 Ngen = 200,000 events1) M(c20)-M(c10)  M(tt) endpoint ~ 124 GeV for the 2) M(t1+/-)-M(c10) ~ 49 GeV. Leshouches spectrum and decay file by Shpeno: ("Spheno_Bhaskarscenario.spc") Cross section = about 7pb (200,000 events  about 30fb-1 Event Selections (modified) N(hadronictau’s) >= 2 (1) for di-tau (tau-muon) case With pTvis > 40 and 20 GeV and |h| < 2.5 N(j) >= 2 with withpT > 30 GeV and |h| < 2.5 ; two leading jets with 150 GeV and 100 GeV Example: if we have 4-jet event, those jets should be >150, >100, >30, >30 GeV. tau detection efficiency of 50% ; fake jet rate of 1% MET > 180 GeV sum of E_T's of two first Jets and MET > 400 GeV muons with pT > 10 GeV(withisolation cut using DR = 0.5)

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