Transcript Single heavy MSSM Higgs production at LC

Testing the Standard Model and Beyond
DOE Review 2004 • Progress Report
Shufang Su • U. of Arizona
Research and Collaborations
 New candidate of dark matter (DM) : superWIMP
J. Feng, F. Takayama (UC Irvine)
 Model independent study of collider DM searches
J. Feng, F. Takayama (UC Irvine)
 Precision study of SUGRA, GMSB and AMSB
S. Heinemeyer (CERN), G. Weiglein (IPPP, Durham)
 Propagation of high energy stau
M. H. Reno (U. IOWA), I. Sarcevic (UA)
 Phenomenology of warped SUSY GUT model
C.W. Chiang (NCU), T. Han (U. Wisconsin), L.T. Wang (Harvard)
 MSSM contribution to precision observables
M. Ramsey-Musolf (Caltech)
S. Su
DOE Review, 2004
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SuperWIMP Dark Matter
J. Feng, F. Takayama (UC Irvine)
WIMP  SWIMP + SM particle
WIMP
FRT hep-ph/0302215, 0306024
104 s  t  108 s
SM
WIMP
SWIMP
(DM)
 Gravitino LSP
 LKK graviton
106
S. Su
DOE Review, 2004
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SWIMP and SUSY WIMP
 SUSY case
~ (LSP)
SWIMP: G
WIMP: NLSP mG~ » mNLSP
Ellis et. al., hep-ph/0312262; Wang and Yang, hep-ph/0405186.
104 s  t  108 s
~
NLSP  G + SM particles
neutralino/chargino NLSP
slepton/sneutrino NLSP
Brhad  O(0.01)
Brhad  O(10-3)
EM
BBN
had
S. Su
DOE Review, 2004
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Viable Parameter Space
NLSP, EM,had=EM,had BEM,had YNLSP
apply CMB and BBN constraints on (NLSP, EM/had )
 viable parameter space
200 GeV ·  m · 400 » 1500 GeV
mG~ ¸ 200 GeV
S. Su
DOE Review, 2004
 m · 80 » 300 GeV
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Collider Phenomenology
 SWIMP Dark Matter
 no signals in direct / indirect dark matter searches
 SUSY NLSP: rich collider phenomenology
NLSP in SWIMP: long lifetime  stable inside the detector
 Charged slepton highly ionizing track, almost background free
Distinguish from stau NLSP and gravitino LSP in GMSB
 sneutrino and neutralino NLSP missing energy
signal: energetic jets/leptons + missing energy
 Is the lightest SM superpartner sneutrino or neutralino?
 Does it decay into gravitino or not?
S. Su
DOE Review, 2004
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Model Independent Study of DM collider searches
J. Feng, F. Takayama (UC Irvine)
 Charged WIMP
Dark Matter (DM) relic density
Two charged track, BG free
Guaranteed detection
Annihilation cross section:
 ( DM ! SM particle)
Production cross section:
- ! DM)
Tevatron:  ( pp
LHC:  ( pp ! DM)
LC:  ( e+e- ! DM)
S. Su
DOE Review, 2004
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Model Independent Study of DM collider searches
J. Feng, F. Takayama (UC Irvine)
Dark Matter (DM) relic density
 neutral WIMP
DM: missing energy signal
Much more difficult
Annihilation cross section:
 ( DM ! SM particle)
Irreducible background: +jet (or )
Production cross section:
- ! DM)
Tevatron:  ( pp
LHC:  ( pp ! DM)
LC:  ( e+e- ! DM)
Production cross section:
- ! DM+jet)
Tevatron:  ( pp
LHC:  ( pp ! DM+jet)
LC:  ( e+e- ! DM+)
S. Su
DOE Review, 2004
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Precision Study of SUGRA, GMSB and AMSB
S. Heinemeyer (CERN), G. Weiglein (IPPP, Durham)
 Tevatron/LHC/LC could measure sin2 and mW precisely
 SUGRA, GMSB and AMSB contribute differently to sin2 and mW
S. Su
SUGRA
GMSB
DOE Review, 2004
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Phenomenology of Warped SUSY GUT Model
C.W. Chiang (NCU), T. Han (U. Wisconsin), L.T. Wang (Harvard)
Extra-Dim
4D
MSSM
SUSY SU(5) GUT
SUSY
Goldberger, Nomura and Smith,
PRD67, 075021 (2003)
Nomura and Smith,
PRD 68, 075003 (2003)
 How do we know it is warped SUSY GUT?
 observe SUSY particle
 observe GUT particle
Rich particle spectra around TeV scale
S. Su
DOE Review, 2004
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Phenomenology of Warped SUSY GUT Model
C.W. Chiang (NCU), T. Han (U. Wisconsin), L.T. Wang (Harvard)
A321,Axy
321
~
q
~
lL
~l ! E + l
R
T/
xy, stable,
track
S. Su
DOE Review, 2004
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Propagation of High Energy Stau
M. H. Reno(U. IOWA), I. Sarcevic (UA)
 Long lifetime stau could be produced in high energy cosmic ray
relatively small production cross section
 It could be detected in current/future neutrino telescope
effective detection volume enhanced by its longer
traveling distance
Albuquerque, Burdman, Chacko, PRL92, 221802 (2004)
Important to understand the energy loss of stau
when it penetrates the earth
 Photonuclear effect
 Pair production
dominate
 Bremsstrahlung
S. Su
DOE Review, 2004
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MSSM Contribution to Precision Observables
M. Ramsey-Musolf (Caltech)
 SUSY contributes to both high (Z-pole) and low (below Z-pole)
precision observables
 Oblique parameters for Z-pole observables are not
good approximation when new physics is near EW scale.
 Systematic study of MSSM contribution to Z-pole observables
 Review paper on “Precision Supersymmetry”
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S. Su
Z-pole and collider studies
Neutral Current studies below the Z-pole
Charge current universality and weak decay
Flavor physics and CP violation
Higgs physics
DOE Review, 2004
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Research and Collaborations
 New candidate of dark matter: superWIMP
J. Feng, F. Takayama (UC Irvine)
 Model independent study of collider DM searches
J. Feng, F. Takayama (UC Irvine)
 Precision study of SUGRA, GMSB and AMSB
S. Heinemeyer (CERN), G. Weiglein (IPPP, Durham)
 Propagation of high energy stau
M. H. reno (U. of IOWA), I. Sarcevic (UA)
 Phenomenology of warped SUSY GUT model
C.W. Chiang (NCU), T. Han (U. Wisconsin), L.T. Wang (Harvard)
 MSSM contribution to precision observables
M. Ramsey-Musolf (Caltech)
S. Su
DOE Review, 2004
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