6/26/09

mSUGRA base point (modified from the 0802.2968 paper)m0=250 GeV ; m1/2=350 GeV ; tan=40 ; A0=0 ; >0

Ngen = 200,000 events1) M(2

0) - M(10) M() endpoint ~ 124 GeV for the

2) M(1+/-) - M(1

0) ~ 49 GeV.

Leshouches spectrum and decay file by Shpeno:("Spheno_Bhaskarscenario.spc")

Cross section = about 7pb (200,000 events about 30fb-1

Event Selections1)N(hadronic tau’s) >= 2 (1) for di-tau (tau-muon) case2)With pT

vis > 40 and 20 GeV and || < 2.53)N(j) >= 2 with with pT > 10 GeV and || < 2.5 4)tau detection efficiency of 90% ; fake jet rate of 5%5)MET > 180 GeV6)sum of E_T's of two first Jets and MET > 400 GeV7)muons with pT > 1 GeV (no isolation cut)

8/13/09First AttemptFirst Attempt

di-tau_diff

tau-muon

Di-tau

tau-muon_diff

OS

LSN

o L

FV

End Point ~ 124 GeV

OS-LS

OSOS

LSLS

1a1a

2a2a

1b1b

2b2b

%...~~~%...~~~

0100

011

02

011

02

8/13/09

[Q1] Is the 2nd bump real effect?

LFV_di-tau

LFV_tau-muon_diffLFV_LFV_tau-muon_diff

LF

V

3a3a

2a2aOS-LS

OS-LS OS-LS

[Q2] The blue curve is from “1b”. This mass distribution should be the same as “2a”. But not… Why?

%...~~~%...~~~

3070

011

02

011

02

8/13/09

mSUGRA base point (modified from the 0802.2968 paper)m0=250 GeV ; m1/2=350 GeV ; tan=40 ; A0=0 ; >0

Ngen = 200,000 events1) M(2

0)-M(10) M() endpoint ~ 124 GeV for the

2) M(1+/-)-M(1

0) ~ 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)1)N(hadronic tau’s) >= 2 (1) for di-tau (tau-muon) case2)With pT

vis > 40 and 20 GeV and || < 2.53)N(j) >= 2 with with pT > 30 GeV30 GeV and || < 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.4)tau detection efficiency of 50% ; fake jet rate of 1%5)MET > 180 GeV6)sum of E_T's of two first Jets and MET > 400 GeV7)muons with pT > 10 GeV (with isolation cut using R = 0.5)

8/14/09Proposed Changes (in Proposed Changes (in redred))