Higgs Update for ICHEP 2008

Andy/Gavin/Sasha

DØ Convener's Meeting

June 20, 2008

ICHEP?

WH -> l nu b b

p17 publication in EB review

- 20% better than LP'07
(3 jet, EC, etc.)

Much learned during p17 review

- shape systematics, triggers,
QCD determination, k-factors,
MC@NLO, ...

For ICHEP, similar to p17, more data:

(2.6/fb), NN+ME combined

Studying combination of NN+ME

- will train NN with ME input

On hold: new EM-ID, JER (tried it!)

Full RunIIb
1.6/fb

ZH -> l l b b

p17+p20 (2.3/fb) NN preliminary for ICHEP in EB review

- Have progressed significantly on systematics

- May still add in 0.4/fb of post-shutdown data...

3.5/fb for winter

Reanalyzed p17

New EM-id

ICR electrons

Mu+track

Mass resolution improvements

NN w/ ME input

muonic b-tagging?

17% additional Z's from ICR + CC/EC

?% additional from new EM-ID

ZH -> nu nu b b

p17 PRL in EB review

Full p17+p20 (2.6/fb) dataset, publication quality for summer

Improved trigger parameterizations

Better QCD understanding / looser cuts (MET>40 GeV!)

Single-tag channel

New MET variable (ala ZZ->nunull)

Separate ZH / WH using isolated tracks?

p17 only...

H->WW-> l nu l nu

May exclude mH=160 at ICHEP! (w/ CDF)

Full dataset (2.7/fb so far...
may add in more last-minute data)

- Greatly improved NN

- Re-analyzed p17

- Looser cuts

- W+j/gamma ME?

- Better systematics (MC@NLO/Sherpa,
W+jets, complete shape systematics)

- D0/CDF H->WW systematics meetings

- New EM-id / re-caffed track-match

On hold:

- ICR electrons

- Optimized 2-jet bin analysis for
VBF, W/Z(->jj)+H(->WW)

ee channel

4xSM!

WH->WWW -> l+ l+

p20 preliminary for ICHEP, 1.6/fb

- luminosity understood to 10%

- good agreement between data/MC

- can use EC electrons

Improvements vs. p17:

- include like-sign and tri-lepton channels

- include all signal channels (WWW/WZZ/ZWW/ZZZ)
with 5 GeV mH grid

- replace likelihood with NN

- looser lepton cuts

- better QCD modeling

On hold:

- new EMid

bh->bbb

p17 PRL approved!

p20 data studied using p17 method
and alternate approach

Will combine with p17 for ICHEP

Improvements will be in publication
(to follow soon after):

- NN

- other triggers (mu)

- jet pairing optimizations

- mass resolution

h-> tau tau

p17 PRL approved!

p20 for ICHEP:

- Focused on mu+tau and Mvis

- Single-mu OR

Then work on:

- e+tau

- NN

- mu+tau triggers

p20 e+mu also available for ICHEP?

bh-> b tau tau

p14 PRL nearly submitted – first TeV publication in this channel!

mu+tau:

p17: working to become more uniform with new p20 analysis

p20: basically ready

- Have alternate methods for estimating QCD

- New likelihood to reduce QCD, combine with anti-top KNN

- Adding new triggers

Combine p17+p20 for ICHEP

e+tau:

p20: at earlier stage, following mu+tau p20 approach

Other

W+W/Z->lnujj: p17 publication in EB review, converging.

H->WW->lnujj: Progressing. p17+p20 for ICHEP. ~15x SM?

VBF: Result for ICHEP using Sherpa reweighting?

H->gg: p17+p20 (2.3/fb) for Moriond'08

- Improved, should be ready for ICHEP (2.7/fb), ~30x SM!

- Hits on road

- Add VBF and W/Z+H signals (may optimize analyses for them)

p20 H->WW->mu+tau (1.6/fb) for ICHEP? Combine with p17?

WH-> taunubb: p17 for ICHEP – in group review!

ZH-> tautaujj(bb): p17 for ICHEP?

Andy Haas

2004-07-07T15:59:13