LHC ATLAS Large Hadron Collider 27km 2010 7TeV ~48pb -1 ATLAS LHC Higgs Muon spectrometer MDT RPC,TGC
TGC RPC ATLAS r : φ : θ : y-z : η=-ln(tan(θ/2)) Resistive Plate Chamber η <1.05 φ-z2 37 Thin Gap Chamber 1.05< η <2.4 r-φ2 32
ATLAS 1 ATLAS 3 1 TGC,RPC 1 PT PT 6threshold PT>10GeV mu10
1 1 Tag and Probe Combined muon (σ/pt~3.8 10-4 PT[GeV] 0.015) Segment tagged muon low Pt(TGC:~6GeV/c,RPC:~3GeV/c)
1 1 Region Of Interest(ROI) dr(< 0.2) ROI dr= (ηroi-ηprobe) 2 +(φroi-φprobe) 2
Tag and Probe Tag and Probe (Z,J/ψ) Decay in flight Step1 ROI Tag muon Step2 Z,J/ψ Probe muon Step3 Probe muon
Turn on curve Turn on curve PT Probe muon PT Fermi Fit a f(p t )= exp( (P T b) c )+1 PT<10GeV J/ψ PT>10GeV Z threshold (mu6,mu10) J/ψ Plateau Z
2010 ~36pb -1 (9/26~10/29) MC
threshold threshold (mu10) Fermi Fit threshold
Plateau(Pt > 20GeV) (mu10) RPC geometry ~80%
Plateau(Pt > 20GeV) (mu10) η DATAMC ~1%
Backup
TGC
RPC
Eta
Period (9/26~10/29)
PLPSLPP$ U;0V$W(G$XYB$ T$ ATLAS 1!"#$%&'($")$*)+),-$./012&0/2&0-$34$(&'($5)$6,0$ )3$-5+207$89$+/6$+66&:3/+;$ 2(+<=07$&/012&0/2>$?@9A$ $B+C37&)>$;3'&2$<+>$=0$ +6C,-)06$)3$+223,/)$437$ 2(+<=07$&/012&0/2&0-A$ D006$-),6>$34$012&0/2>$ E+7&+:3/$F&)($570--,70$+/6$ )0<507+),70G$+)$)(0$<3<0/)$ 3/;>$570--,70$237702:3/$3/$ %HA$ $ I7+/20-2+$(J5KLL&/6&23A207/A2(L23/4070/20M&-5;+>A5>N23/4.6OPPQRQS$