New Physics at the LHC/ILC B-L Workshop, LBNL September, 2007 Sally Dawson (BNL)

Three Examples : The Higgs Supersymmetry New Z’ boson  What do we know from the Tevatron?  What will the LHC tell us?  What needs the ILC? I hope we find something we haven’t thought of yet!

Will be data driven Particle Physics in tne LHC/ILC Era

Bat 40 Eagerly anticipating LHC data……

From the Tevatron to the LHC  Large increase in cross sections as we go from the Tevatron to the LHC 1 TeV squark/gluino pair production High p T QCD Jets D Drell-Yan production of W’s & Z’s Gluon fusion of 150 GeV Higgs F. Gianotti, Phys. Rep. 403, 379 (2004)  s (TeV)  (nb) LHCTevatron

 O(100 pb -1 ) per experiment by early 2009 Early Physics at the LHC ChannelEvents/100 pb -1 at LHC Previous # of Events W→W→ LEP, 10 6 Tevatron Z →e + e LEP, 10 5 Tevatron Tevatron QCD jets, p T >1 TeV> TeV Gluino pairs50  Early data used to calibrate detectors Z→e + e -,  +  - (Tracker, ECAL, Muon chambers calibration) tt →WbWb (Jet scale from W →jj, b-tag efficiency, etc)  Rediscover SM physics at  s=14 TeV: W, Z, top, QCD

Precision measurements limit Higgs Mass LEP EWWG (July, 2007): –M t =170.9  1.8 GeV –M h = GeV –M h < 144 GeV (one-sided 95% cl) –M h < 182 GeV (Precision measurements plus direct search limit) Best fit in region excluded from direct searches 2007 M h (GeV)

SM Higgs Searches at Tevatron Tevatron Observed Tevatron Expected LP07

W, Top, and the Higgs  Will indirect measurements agree with what the LHC sees? Run II 2009 Includes K factors M h (GeV)M t (GeV) M W (GeV)

SM Higgs Production at the LHC Dawson, Jackson, Reina, Wackeroth, hep-ph/ M h (GeV) Rates well understood

Higgs discovery potential at the LHC ATLAS+CMS Needed  Ldt per experiment (fb -1 ) 1 fb -1 : 95% C.L. exclusion 5 fb -1 : 5  discovery M h (GeV) J. Blaising et al, Eur. Strategy Workshop Assumes well understood detector

Is Mass Due to a Higgs Boson? LHC measures couplings to Higgs bosons to 10-20% ILC measures couplings to Higgs bosons at few % level Duhrssen, hep-ph/ M h (GeV) BR(H →X) Self coupling of Higgs needed to reconstruct Higgs potential. Extremely challenging at both LHC and ILC Battaglia & Desch, hep-ph/

 Threshold behavior measures spin at ILC ILC with 20 fb -1 /point Measuring the spin of the Higgs  Spin is hard at the LHC! LHC with 300 fb -1 Choi, Miller, Muhlleitner, Zerwas, hep-ph/ M(Z*) (GeV) Number of Events  s (GeV)  (fb) J. Aguilar-Saavedra, hep-ph/

MSSM Higgs Searches at the Tevatron LP07 M h max,  > 0 h, H, A   (D0)  Dominant SUSY Higgs production mechanism is gb→b  for tan  > 7 M A (GeV) tan 

MSSM Higgs at the LHC  Even with a lot (!) of data there are regions where the LHC can’t get all the MSSM Higgs M A (GeV) tan 

Squarks & Gluinos at the Tevatron LP07  M gluino > 290 GeV  If M gluino =M squark, M > 380 GeV Strongly interacting SUSY particles have large rates at the Tevatron and LHC M gluino (GeV) M squark (GeV)

mSUGRA at the Tevatron LP07  Tevatron probes just the tip of the iceberg  mSUGRA is useful framework for study M 0 (GeV) M 1/2 (GeV)

SUSY at the LHC  (pb) M (GeV) Tevatron  Huge rates; well defined signatures  M(gluino, squark)  1 TeV gives 100 events with 100 pb -1 at LHC  Immediate improvements over Tevatron limits M 0 (GeV) M 1/2 (GeV) 2009 Tata

300 fb -1 at LHC If LSP is dark matter, and SUSY is mSUGRA…..LHC and ILC will see SUSY Region allowed in mSUGRA by WMAP with LSP as dark matter M 0 (GeV) M 1/2 (GeV) tan  =30, A 0 =0,  >0 100 fb-1 at ILC Baer, Belyaev, Krupovnickas, Tata, hep-ph/

Z’ at the Tevatron M Z’ (GeV) Z’ →e + e - Many different types of Z’s are possible  BR (pb)

New Z ’ boson at the LHC  Small SM background  Narrow peak above background Z’  e+e- with SM- couplings (SSM) Z’ Mass (TeV) Events with 1 fb -1 Discovery Luminosity (10 events) pb pb fb -1

ILC Needed for Z’ Coupling Measurement  Which Z’ is it?  Kaluza Klein state?  Copy of standard model?  Extended gauge symmetry? ILC cleanly distinguishes between models L=1 ab -1, P - =.8, P + =.6,  P=.5%,  sys (lep)=.2% S. Riemann Z’ couplings to leptons

Conclusions Discoveries coming soon