News and plan

News • A discussion with SM/Exotic conveners

• ICHEP timescale is too tight. • We are allowed to extend the analysis to summer.• All the analysis should be finished before end of summer.• Combined SM+Exotic results.• Included Z->nunu+gamma

Timeline • May 29:

• First round of Background estimation • First round of signal unfolding ntuples ready• May 31:• ATGC 2D grid parametrization ready for Wg/Zg/ Znunug.

• June 1 : Supporting note ready • June 4~6: EB meeting

• unblind Exotic analysis.• June 6~ June 13 :

• Finalizing background estimation. • Final unfolding ntuples ready.• MCFM NLO cross section central value ready.

• June 13 (egamma meeting):• Photon efficiency recommendations from Egamma• Electron/photon isolation efficiency approved by Egamma.• Electron fake photon rate for Znunu+gamma

Timeline

• June 18 : update supporting • Observed Exotic limits ready• First round of measured cross section ready • MCFM NLO cross section systematics ready with part of systematics.• First round of ATGC limits

• June 19~21 : EB meeting && major update in SM/ DBL meeting • June 21~29 :

• Response to EB questions • Second round of measured cross section• Second round of ATGC limits with full systematics

• July:• Circulate supporting note in early July to SM/Exotic group.• Combined SM+Exotic approval early July.

• August:• First draft of paper ready before August

cross section measurement

Unfolding

Unfolding factors for photon pT

The goal : differential measurement• Systematics :

• Each time vary one systematics, rebuild the response matrix Rij

Jet multiplicity ( Wg/Zg) • Binning : [0,1] , [1,2] , [2,3] , [3,inf] • Phase space : pT_gamma> 15 , 60 , 100GeV

• Data histogram (Camilla/Feng and Henso/Matthew) : • W/Z jet shape• taken from non isolated (nominal ) • From nontight photons (cross check)

• Photon jet shape:• taken from non-isolated leptons

• Other Background : Taken from Monte Carlo .

Transverse mass (Wg) and invariant mass (Zg)

• Binning : [50,100],[100,150],[150,200],[200,300],[300,400],[400,inf]• Phase space : pT_gamma> 40 GeV , inclusive without jet veto• Variable :

• Transverse mass (Wg) • invariant mass (Zg)

Radiation zero for W+gamma• Variable : |etalepton- etaphoton|

• Binning: [0,0.5],[0.5,1],[1,1.5],[1.5,2],[2,inf]• Phase space :

• Only for Wgamma. • pT_gamma> 60 GeV , jet veto (exclusive )

ΔΦ (photon; leading jet)• Variable : ΔΦ (photon; leading jet)• Binning: [0,π/6],[π/6, 2*π/6],[2*π/6, 3*π/6], [3*π/6, 4*π/6],

[4*π/6, 5*π/6], [5*π/6, π]• Phase space :

• pT_gamma> 60 GeV • Events with one jet • Mainly for Wgamma• Need to check whether we have statistics for Zgamma