1. CMSUK Higgs activities
Nikitenko, meeting with IPPP, RAL 10th September 2007

2. most active UK CMS Higgs boson enthusiasts:
Imperial College
A. Nikitenko: CMS Higgs PAG co-coordinator
RAL
Involved in
ECAL construction
Tracker construction
Experience is reconstruction
Electrons and photons
Chris Seez (IC) : ECAL DPG co-coordinator
David Futyan (IC) : e/gamma POG co-coordinator
Tau-jets
B-tagging
Ian Tomalin (RAL): b tagging POG co-coordinator
Jets and missing ET

3. Experience in Higgs physics analyses; past: CMS Physics TDR 2006 vol
Experience in Higgs physics analyses; past: CMS Physics TDR 2006 vol. II
CMS approved and published analyses
SM Higgs: VBF H->tt->l+jet CMS Note 2006/088
SM Higgs: H->ZZ->2e2m CMS Note 2006/136
MSSM A->tt->2 jets, CMS Note 2006/126
5D Randall-Sundrum model, f->hh->ggbb CMS Note 2005/007
Recent papers with UK based theorists
Les Houches 05, hep-ph/ , “Comparizon between MCFM and PYTHIA for the gb->bh and
gg->bbh at LHC”, with J. M. Campbell
Hep-ph. arXiv: accepted for journal,”Search for heavy neutral MSSM Higgs bosons: Reach and Higgs mass precision”, with G. Weiglein

4. “Known” SM & MSSM Higgs physics CMS PTDR 06 Vol. II

5. CMS Higgs analyses 2007-08 with 1 fb-1
Production
Decay
SM inclusive
ZZ(*)  4 l
07, IC
WW(*) 2 l 2 
SM VBF (qqH)
 
SUSY, gg(bb)f 
SUSY, t-> bH, gb>tH
 
SUSY gg (bb)A/H
08, IC
SUSY, qq->qqH
invisible
« R&D physics»: NMSSM, CPV (IC, RAL), … < 10 %

6. “Low fine-tuning” NMSSM points
qqH1, H1->a1a1->tttt->mmjj
Need non-isol.
di-m trigger !
R. Dermisek and J.F. Gunion
See in CPNSH group report
hep-ph/ m- h+ t- q1 t+ a1 H1 a1 t- t+ q2 m- h+
This point is taken for analyses with 4t->mmjj final state (CMS):
qqH1 and WH1 (motivated by S. Moretti et al. hep-ph/ )

7. The H+ in CPV MSSM
LEP Higgs working group, hep-ex/ ), Mt=174.3 GeV
present Mt= /- 1.8 GeV
most promising channel to close the hole is : tt bW bH+, H+W H1, H1bb final state: 4b 2j l is same as ttH, Hbb !
D.K. Ghosh, R.M. Godbole and D.P. Roy, Phys.Lett. B628, 131 (2005)

8. Prospects for future
Participate in analyses mentioned before when the real data come
SM qqH, H->tt
SM inclusive H->ZZ->4l
MSSM A->tt
CPV Higgs
NMSSM Higgs
Probably start inclusive H->gg analysis
CMS TN 1992/005, “Higgs into two photons”, C. Seez and J. Virdee (IC)

9. Early data comes very soon !

10. Preparing for Higgs physics with early LHC data
EWK physics: Z->ee, W->en cross section measurement, electron efficiency with Z->ee “prob-and-tag” method
Bristol, IC
EWK physics: Z->tt->l+jet cross section measurement, t-id measurement. IC
qqH, H->tt , some topics to study with early data:
Central jet veto efficiency from Z+jets (Z->ll) data; “Zeppenfeld plot”
Bkg. from double parton scattering Z+j plus jj (Z->ll)
Bkg. W+3jets (W->ln), SS lepton+jet vs OS lepton+jet
…………………………………………………….
Measurement b(b)Z as benchmark for MSSM b(b)H. IC

11. Enjoy early LHC physics in CMS...
H->gg
10 pb-1
100 pb-1
H->ZZ->4l
dots – “experiment”

12. THE END