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Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1 1       Light MSSM  Higgs boson scenario Light MSSM  Higgs boson scenario Alexander Belyaev Alexander Belyaev In collaboration with Ching-Hong Cao, Daisuke Nomura, Kazuhiro Tobe, C.-P. Yuan hep-ph/0609079 hep-ph/070xxxx NEXT INSTITUTE (Southampton-Rutherford)

Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

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Page 1: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 11

      

Light MSSM  Higgs boson scenarioLight MSSM  Higgs boson scenario

Alexander BelyaevAlexander Belyaev

In collaboration with Ching­Hong Cao, Daisuke Nomura, Kazuhiro Tobe, C.­P. Yuanhep­ph/0609079 hep­ph/070xxxx

NEXT INSTITUTE (Southampton­Rutherford)

Page 2: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 22

      

Short SummaryShort Summary The MSSM scenario with the CP­even Higgs 

boson as light as ~60 GeV (and above) is not 

excluded by LEP2 contrary to common belief 

The MSSM parameter space corresponding to 

this Light higgs  scenario (LHS) is generic

The entire parameter space corresponding to 

LHS can be  covered by LHC

Page 3: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 33

      

The present status of the SMThe present status of the SM

Higgs boson is the most wanted particle! The present Higgs mass limit is 114.4 GeV from LEP2 data

Based on SU(3)xSU(2)LxU(1)Y gauge symmetry spontaneously broken down to SU(3)xU(1)e: Matter: 3 generations ofquarks and leptonsOne of the central role is played by Higgs field

interacts with all fieldsdevelops condensate W,Z bosons, lepton and quarks    and Higgs field itself acquires mass

Page 4: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 44

      

Why Supersymmetry is so attractive?Why Supersymmetry is so attractive?relates bosons and fermions

extends Poincaré algebra to super­Poincaré  algebra with the most general set of space­time symmetries solves fine­tuning problem of SM

provides    gauge coupling unification

LSP is stable (R­parity):   perfect DM candidate

allows to introduce fermions into string theories

Page 5: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 55

      

MSSM HIGGS sectorMSSM HIGGS sectortwo Higgs complex-doublet

  provides masses to both up­ and down­ quarks ensures anomaly cancellation

8 degrees of freedom 3 absorbed into longitudinal components of the W and Z 5  remains:

Page 6: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 66

      

““Little” Fine Tuning in MSSMLittle” Fine Tuning in MSSM MSSM has a “little problem”: Mh < MZ at the tree­level!

Solution to obey  Mh > 114.4 GeV LEP2 limit: 

   SUSY scale       1 TeV 

   top­stop radiative corrections 

the price:  ~ 1% of fine­tuning

is there other way to avoid LEP2 Higgs bound?

Page 7: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 77

      

Higgs (if there is) prefers to be non­SM like!Higgs (if there is) prefers to be non­SM like!

Page 8: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 88

      

MSSM Higgs Interactions with vector bosons MSSM Higgs Interactions with vector bosons 

Sum rule: blue2+red2=1

Page 9: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 99

      

No lose?No lose?

Zh and Ah channels are highly complementary!Zh and Ah channels are highly complementary!

Page 10: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1010

      

Both channels has been studies at LEP2Both channels has been studies at LEP2

hep­ex/0602042

Similar limits are for  H­> channel, but Br(H­>)  is one order of magnitude smaller then Br(H­>bb)

hep­ex/0602042

Page 11: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1111

      

Higgs mixing and radiative correctionsHiggs mixing and radiative corrections

treeassuming tanfor simplicity

decoupling (SM­like light Higgs):decoupling (SM­like light Higgs):

at tree­level

non­decoupling (non­SM­like light Higgs):non­decoupling (non­SM­like light Higgs):

Page 12: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1212

      

Suppression of ZZh couplingSuppression of ZZh coupling

the lightest neutral Higgs is mainly hD and

very different from decoupling 'standard' scenario!

Page 13: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1313

      

Sample point as an exampleSample point as an example

tree level: loop corrected:

Page 14: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1414

      

Suppression of ZZh couplingSuppression of ZZh coupling

additional 'help' from                                            is important! 

Page 15: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1515

      

Suppression of the lightest Higgs massSuppression of the lightest Higgs mass

Page 16: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1616

      

MSSM parameter scan MSSM parameter scan 

Parameter space, CP conserving case Constraints

CpsuperH is used

(Lee,Pilaftsis,Carena,Choi,Drees,Ellis,Wagner)

Page 17: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1717

      

Scan Results: ~60 GeV light Higgs boson  is allowed!

Page 18: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1818

      

Key­point:  SUSY corrections suppressing H and bbH couplings in non­universal way!(Carena,Mrenna,Wagner;Borzumati,Farrar,Polonsky; Guasch,Hollik,Penaranda)

Page 19: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 1919

      

Key­point:  SUSY corrections suppressing H and bbH couplings in non­universal way!(Carena,Mrenna,Wagner;Borzumati,Farrar,Polonsky; Guasch,Hollik,Penaranda)

Page 20: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2020

      

LHS sample point LHS sample point 

Page 21: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2121

      

LHS parameter space versus LEP2 LHS parameter space versus LEP2 constraintsconstraints

Page 22: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2222

      

Associated production of Charged – Neutral Associated production of Charged – Neutral Higgses would a perfect test of LHSHiggses would a perfect test of LHS

  large WH+h coupling scenario makes H+h  (H+A) associate production very special: complementary to LEPII

                             : does not depend on SUSY parameters at tree­level

Page 23: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2323

      

HH++A  signal rateA  signal rate

Q.-H. Cao, S. Kanemura, C.-P. Yuan hep-ph/0311083

NLO QCD correction is about 20%

Page 24: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2424

      

Signal / background studySignal / background study                                                         process   

                                   signature

 backgrounds, cuts

  PPT T ­dependent b­tagging:­dependent b­tagging:  basic cuts:basic cuts:

    + veto for jets and leptons in the central region:

  hard cuts:hard cuts:

Page 25: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2525

      

Tevatron/LHC  HTevatron/LHC  H++A production ratesA production rates

LHC is sensitive to ~1fb levelrate for this signaturewith 100 fb­1 

integrated luminosity

Page 26: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2626

      

10 fb10 fb­1  ­1  and 100 fband 100 fb­1­1LHC reach for HLHC reach for H++A productionA production

10 fb10 fb­1 ­1  100 fb100 fb­1 ­1 

Page 27: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2727

      

Projecting onProjecting on to tan to tan – M – MAA plane plane

HH++AA

Page 28: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2828

      

Further LHC prospects for Yukawa enhanced processesFurther LHC prospects for Yukawa enhanced processes

not using tan axes !

Page 29: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 2929

      

Further LHC prospects for Yukawa enhanced processesFurther LHC prospects for Yukawa enhanced processes

not using tan axes !

Page 30: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3030

      

LHS: features/consequencesLHS: features/consequencesLight MSSM Higgs  ~ 60 GeV mass is allowed! 

Light Charged Higgs ● small ZZh coupling and large WH+h coupling

Intermediate – large  and At  ● Large and intermediate-heavy gluino provide

non-universal corrections to tau and bottom Yukawa couplings suppressing Br(H->bb)

Intermediate­high tan● provides futher suppression of Br(H->bb), in agreement

with b->sLight stops and charginos!    H+A : LHC covers the whole LHS parameter space, suggested process is independent of tanCorrelation with Yukawa­enhanced processes, ILC precision testsImportant tests from B­physics experimets!Different look at fine­tuning problem (especially for ~90 GeV MH )

Page 31: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3131

      

Backup slidesBackup slides

Page 32: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3232

      

B­physics constraints: B­physics constraints: >0 case>0 case

Br(BS→ ) constraint

Page 33: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3333

      

B­physics constraints: B­physics constraints: 0 case0 case

Br(BS→ ) constraint

Page 34: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3434

      

B­physics constraints: B­physics constraints: 0 case0 case

Br(BS→ ) constraint

Page 35: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3535

      

B­physics constraints: B­physics constraints: 0 case0 case

Br(BS→ ) constraint

Page 36: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3636

      

New BELLE results: charged Higgs constraints New BELLE results: charged Higgs constraints consistent with Lh scenario!consistent with Lh scenario!

Page 37: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3737

      

Higgs masses and their correlations in LHSHiggs masses and their correlations in LHS

Page 38: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3838

      

Higgs masses and their correlations in LHSHiggs masses and their correlations in LHS

Page 39: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 3939

      

10 fb10 fb­1  ­1  and 100 fband 100 fb­1­1LHC reach for HLHC reach for H++A productionA production

10 fb10 fb­1 ­1  100 fb100 fb­1 ­1 

Page 40: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 4040

      

Tevatron reach for HTevatron reach for H++A productionA production

Page 41: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 4141

      

10 fb10 fb­1 ­1 

Page 42: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 4242

      

100 fb100 fb­1 ­1 

Page 43: Alexander Belyaev - Southamptonpersonal.soton.ac.uk/ab1u06//talks/my-talks/2007/belyaev_lh_susy07.pdfAlexander Belyaev "Light MSSM Higgs boson scenario", SUSY 2007 3 The present status

Alexander Belyaev "Light MSSM Higgs boson scenario",  SUSY 2007 4343

      

Scan Results Scan Results