Eilam Gross Weizmann institute of Science/ATLAS

Non SM Higgs Prospects @ LHC
Eilam Gross Weizmann institute of Science/ATLAS Acknowledgements: Markus Schumacher MSSM CPC Higgs Sector Prospects for MSSM Higgs Discovery MSSM CPV Higgs Sector Prospects for MSSM CPV Higgs Discovery Sabine Kraml The flowering of the Higgs physics that is expected to bloom at the TeV scale from the CPNSH report: the hitchhikers guide to non-standard Higgs physics To be published as a CERN yellow report Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow
MSSM In the MSSM model there are 5 Higgs bosons: h,H,A and H+,H- The relation between the SM and light SUSY Higgs couplings is given by where a is the mixing angle between the two scalar Higgs bosons and tgb is the ratio between the two vacuum expectation values Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

The h/H Production Processes @ LHC
q H MAXMH Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Radiative Corrections
diagonalization Allow mixing ( )between scalar stop quarks (with large tgb) can push the light Higgs mass upper with a maximum of ~135 GeV Different mixings various scenarios (benchmarks) MHMAX No Mixing Gluophobic: Suppressed hgg coupling Small aeff Suppressed hbb,htt coupling Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

The Gluophobic Benchmark
The GGF process is not necessarily the dominant one. SUSY loops might reduce it. In the GLUOPHOBIC scenario the top-stop loops suppress the GGF cross section. Gluophobic Min Mix Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Couplings & Decay Widths
The Higgs couple to MASS  prefers downtype leptons (t) and b-quark Note how hgg is suppressed for high tgb and Agg is forbidden Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

For large values of tgb ; tgb>>1tgb~1/cosb; cosb<<1 and small values of mAmA~mh, cos2(a-b)~sin2a~1Large Gh Large tgbLarge GA Large decay widths reduce the signal sensitivity with respect to the SM channels. A correction factor is applied h Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

For large values of tgb ; tgb>>1tgb~1/cosb; cosb<<1 and small values of mAmA~mh, cos2(a-b)~sin2a~1Large Gh Large tgbLarge GA, Large mALarge GH K = Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Towards Experiment Channels taken into consideration Analysis is mostly based on ATLAS fast simulation. Trigger efficiencey, Mass resolutions & Particle ID all based on Full Simulation Luminosity considered is Low luminosity fb-1 (1st three years LHC) High luminosity (+ pile up..) +270 fb-1 (another ~3-4 years) q g t W H b H+ Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Towards Experiment When a SM analysis was applied correction factors were uses…. e.g. LO cross sections were used (conservative!) A correction for widths was applied An increase of sensitivity was taken into account when two independent channels (e.g. H,h) overlapped. Dedicate searches bbh/H/A with Higgsmm,tt and for Charged Higgs Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Definition of Discovery
Background Channel ttbb, ttqq ttH, Hbb ZZ, Zbb, tt HZZ4l gg,qg,QCD Hgg tt, DY, QCD Htt tt, WWqq VBF HWW tt,Zqq VBF Htt Each channel was considered with its corresponding background, and an excess was considered a discovery if the probability of the background fluctuating to the expected background+signal is less than 2.85x10-7 (poissonian, equivalent to 5 sigmas) Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

The Challenge Can we discover MSSM ? Which Higgs can we observe? H? h? A? H+? If we observe a scalar, can we tell if it’s a SM Higgs? h? A? H+? H? Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

VBF H and h Production q H VBF is related to the MSSM Higgs coupling ghVV~sin2(a-b), gHVV~cos2(a-b)  Complementarity Note that the H coupling is suppressed at large mA The VBF is important for h close to its maximal mass (large mA) and H at its lower mass bound Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

VBF H,hWW No mass reconstruction Need to understand WW BG Higgs mass & ghVV too small Both Production & Decay suppressed s(qqqqh)xBR(hWW*) low ATLAS preliminary 30 fb-1 Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

VBF H,htt ETmiss resolution t tag (including t jet) ATLAS preliminary 30 fb-1 Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

H,h,Agg Good mass resolution & photon identification compensates for the poor BR ATLAS preliminary 300 fb-1 Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

GGF H,hZZ4l A gold plated channel for SM Higgs (due to the excellent e/m identification) The heavier the light h the bigger the BR(hZZ*) , H & h are complementary, the heavier the A, the HZZ coupling suppressed A does not couple to ZZ In the no mixing scenario the Higgs is lighter and the BR(hZZ*) is a killer Higgs mass & ghVV too small BR(hZZ*) too low ATLAS Preliminary 300fb-1 Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

ttH,tthttbb ttH/h is complementary to the H/hZZ Low mAlow mhIncreasing xsc Low tgbghtt increasesIncreasing xsc ATLAS Preliminary 300fb-1 ttH tth Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

ttH,tthttbb ttH/h is complementary to the H/hZZ In the minimal mixing the h mass is smaller and the coverage is full ATLAS Preliminary 300fb-1 Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

ppbbh, bbH, bbA Channels studies with Higgsmm,tt Channels contribute for large tgb since all couplings are enhanced wrt SM couplings by ~1/cosb and H and h are complementary The Muonic decay mode suffers from very low BR but a clean signature Increasingg s 30fb-1 300fb-1 Decreasing s ATLAS PRELIMINARY 450 Gev due to Htthad had Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Charged Higgs tree level mH+2 = mA2 + mW2 Rad Corrs: Charged Higgs mass can be pushed down below the W mass For mA<150, mH+<mtop tH+b opens mtop Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Charged Higgs Boson Dominant decay mode to tn until the phase space for the top quark opens (at ~160 GeV) For mH+<mtop (mA<150) the dominant decay mode is to tn while for mH+>mtop (mA>150) the dominant decay mode is to tb for low tgb Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Production of Charged Higgs @ LHC
Dominant production modes: For mA >150 Signal gbtH+ttb,ttn ggtbH+ Dominant production modes for mA <150 via the decay of a top quark pptt, t H+ b Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Discovery Sensitivity for Charged Higgs
tn decay is decreasing as mA is increasing but scales up with increasing tgb (coupling ~mt tgb) 30 fb-1 300 fb-1 Increasingg tn tt BG ATLAS PRELIMINARY Decreasing tn Mtop Transition region requires study ATLAS preliminary Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Discovery Sensitivity for h
For minimal mixing it seems the coverage is full Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Discovery Sensitivity for h
VBF (hVV) decouples for high tgb and low mA Must use bbh, however… The htt has DY background and no mass reconstruction possible. hmm is cleaner but with a very small BR. It also decreases with decreasing tgb Therefore for small mA the bbh with hmm leaves a hole towards lower tgb There the complementary VBF Htt will cover Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Overall Sensitivity In a large region only one light Higgs is observed Lone Higgs SM or SUSY Higgs? The challenge of the LHC or the place where LHC/ILC meet Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Overall Sensitivity Excluded by LEP There is a full coverage in all benchmarks! Can the Lone Higgs region be probed for NonSM evidence? Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

A/H->c20c20->4l + ETmiss
Sensitivity in very specific points in the MSUGRA SUSY phase space CMS Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

A Way Around the Hole JHEP 0409 : 062 , 2004, Desch, E.G., Heinemeyer, Weiglein, Zivkoviic Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

A Way Around the Hole hep-ph/ Weiglein et. al. It will take a lot of luminosity from LHC to get reasonable BRs accuracies Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

CPV MSSM Higgs Can h,H and A mix? With complex trilinear couplings At,b No more well defined mA , the only remaining well defined mass parameter is mH+ mH1<mH2<mH3 The CPX scenario is defined with Arg(At,b)=90o providing maximal mixing in the Higgs sector Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Decay Modes of CPV Higgs
In the CPC case, are forbidden A  hh ,WW ,ZZ and HhZ Production VBF ; ppttHi, bbHi ; ppHi & ttH+bWb, gbH+t Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Decay Modes of CPV Higgs
In the CPC case there is no coupling gAVV Note that for mH+<150 the H1 decouples from the V Bosons Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

LEP results Loss of sensitivity around tgb~3-10 due to complexity of final states (ZH26 jets… H1H2bbbb etc.) and insensitivity to very low Higgs mass Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

ATLAS Sensitivity to H1 30fb-1 Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

ATLAS Sensitivity to H1 30fb-1 The hole is due to: H1VV (decay and VBF) suppression for lighter H+ and decreasing tgb ttH production mode is strongly suppressed for high tgb Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

ATLAS Sensitivity to H2,3 30fb-1 The bbH cross section is decreasing with increasing H mass and decreasing tgb There is a reduction in the tt decay BR in favour of bb and H2H1H1 while light H1 was not yet studied for LHC Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

ATLAS Sensitivity to H+
30fb-1 Similar to CPC case (H+ is the only surviving Higgs mass eigenstate) Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Overall Sensitivity Looks complete… HOWEVER 300 fb-1 Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

Overall Sensitivity The hole corresponds to light Higgs mH1<70, mH+<mtop For each i Hole might be covered with additional analysis of tt with one top tbH+bWH1 and another top decaying leptonically 300 fb-1 Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

CPV Overall Sensitivity
300 fb-1 Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

CPC Conclusions Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

CPC Conclusions For the CP conserving MSSM Higgs, all of the parameters space is potentially covered (30 fb-1) by the prospective discovery of at least one Higgs boson This coverage is seen in all benchmark scenarios and therefore reflects probably most of the MSSM phasespace In a Large region of the parameters space only the light SM like Higgs Boson might be observed (the “lone Higgs region”) and LHC challenge would be to tell if it is a SM Higgs Boson More thought and creative ideas are needed to fill the “lone Higgs region” with more observed Higgs Bosons Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

CPV Conclusions For the CP violating MSSM Higgs, although most of the parameters space is potentially covered by observing at least one Higgs Boson (300 fb-1) there is still a hole and further study is needed. An LHC dedicated low mass Higgs (below 70 GeV) analysis is necessary for the CPV case. An extended study of low mass Charged Higgs could improve the potential coverage Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow Eilam Gross, Weizmann Institute, NSMHiggs , ichep06, Moscow

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Eilam Gross Weizmann institute of Science/ATLAS

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