P14 Certification

new structure functionalities/developments

• MuoCandidate:

• quality criteria:

proposed new criteria according to muon types preliminary efficiencies

Frédéric Déliot CEA-Saclay

17-JUN-03, F. Déliot Beaune Workshop

MuoCandidate New Structure

run on thumbnail and recreate a certified MuonParticleChunk

(d0reco chunk) with additional variables

only one interface: chunks

• like the EM candidate code:

MuoCandidate

MuonFromChunk MuonFromTree MuonFromTuple

Certification

list of MuoCandidates

thumbnail root-tree root-tuple

MuoCandidateChunk

MuoCandReco p13_02_tree p13_02_tuple

MuonParticleChunk

Certification

thumbnail

root-treethumbnail

Muo

Can

dida

te

MuonParticleChunk’

root-tuple

analysis format

b-tagging

display

missing Et …

Old New

17-JUN-03, F. Déliot Beaune Workshop

p14 MuoCandidate

p15 ( p15.03.00) will be the base release for p14 muon analyses

in the muonid package, call for a specific RCP (post-processing)

can be run on p13 tmb

• framework:

• some functionalities and developments: remove remaining duplicates (nseg: +2/+2, +1/+2)

compute isolation variables (Halo, track isolation)

access stored hits (Lucas) and error words (Christophe) developments:

• rebuild MTCs including EM informations (Mark)• use road-method to find MTCs• rematching nseg = +1 (Gtrack+A) with BC segment (nseg=-2): ||1

17-JUN-03, F. Déliot Beaune Workshop

Quality criteria

mostly: BC scintillator requirement in the central region

• which cuts cause the efficiency losses:

MC single (10 GeV)

# BC scint > 0

17-JUN-03, F. Déliot Beaune Workshop

relax this cut if:

0 < # BC wires < 4

BC scintillator cut

MC single (10 GeV)

17-JUN-03, F. Déliot Beaune Workshop

Different Muon Types

nseg=1: Gtrack + A segment nseg=2: Gtrack + BC segment

• muon types according to the nb of segments:

those are well reconstructed

muons specific criteria for octant 5 and 6

17-JUN-03, F. Déliot Beaune Workshop

nseg = 1

nseg=1: A segment properly matched with a central track: estimation of the energy loss in the calorimeter and in the toroid:

• enough energy to cross the toroid loose muon (#wire>1, #scint>0) except in the bottom part (medium)

• low p medium muon (#wire>1, #scint>0)

• low pt or misreconstructed ?

Armand Zylberstejn

Probability to have simulation hits

(d0gstar) at the A layer per p bin

17-JUN-03, F. Déliot Beaune Workshop

Proposed Criteria

nseg=1: # wire>1, # scint > 0 loose

if low p medium

if in octant 5,6 et || < 1.6 medium nseg=2: # wire>1, (# scint > 0 || # wire < 4) loose

if in octant 5,6 et || < 1.6 medium |nseg|=3: (wA>1 || sA>0), wBC>1, (sBC > 0 || # wBC < 4) medium

loose: allow 1 requirement to fail

• different criteria according to muon types:

• require at least one scintillator for loose |nseg|=3 ? needed to remove halo muons ?

closer to trigger requirement ?

17-JUN-03, F. Déliot Beaune Workshop

Efficiencies

MC Single muon (10GeV)

• preliminary efficiencies (no acceptance corrections for MC):

Old New

MC J/

L: 86.6 %

M: 69.5%

L: 88.9 %

M: 77.6%

L: 30.4 %

M: 25.0%

L: 67.1 %

M: 52.9%

L: 92.2 %

M: 60.8%

L: 92.2 %

M: 74.5% Emily’s picked Z

sample L: 88.0 %

M: 71.9%

L: 90.3 %

M: 79.0%

MC Z

17-JUN-03, F. Déliot Beaune Workshop

Conclusion

new structure in place

still to do:• some adjustements• study rematching nseg = +1,-2 in ||1• MTCs• standard tools to compute some efficiencies/resolutions (as EM people: muo_cert)

• MuoCandidate:

• quality criteria: looks promising in term of efficiency more studies to be done (help is welcome):

• low pt: background/fakes, efficiency on J/ data

• impact of “at least one scintillator requirement” on efficiency (loose |nseg|=3 definition)

at some point, we have to decide !