1. Testing the Standard Model and Beyond
DOE Review 2004 • Progress Report
Shufang Su • U. of Arizona

2. Research and Collaborations-
New candidate of dark matter (DM) : superWIMP
J. Feng, F. Takayama (UC Irvine)
Model independent study of collider DM searches
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

3. SuperWIMP Dark Matter WIMP  SWIMP + SM particle WIMP
J. Feng, F. Takayama (UC Irvine) -
WIMP  SWIMP + SM particle
FRT hep-ph/ ,
WIMP
104 s  t  108 s SM
WIMP
SWIMP
(DM)
 Gravitino LSP
 LKK graviton
106
S. Su
DOE Review, 2004

4. SWIMP and SUSY WIMP SWIMP: G (LSP) WIMP: NLSP mG » mNLSP ~ SUSY case-
SWIMP: G (LSP) WIMP: NLSP mG » mNLSP ~
SUSY case ~
Ellis et. al., hep-ph/ ; Wang and Yang, hep-ph/
104 s  t  108 s
NLSP  G + SM particles ~
neutralino/chargino NLSP
slepton/sneutrino NLSP
BBN EM
had
Brhad  O(0.01)
Brhad  O(10-3)
S. Su
DOE Review, 2004

5. 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 ~
 m · 80 » 300 GeV
S. Su
DOE Review, 2004

6. Distinguish from stau NLSP and gravitino LSP in GMSB
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
 Does it decay into gravitino or not?
 Is the lightest SM superpartner sneutrino or neutralino?
S. Su
DOE Review, 2004

7. Model Independent Study of DM collider searches
J. Feng, F. Takayama (UC Irvine) -
Charged WIMP
Dark Matter (DM) relic density
Annihilation cross section:
 ( DM ! SM particle)
Production cross section:
Tevatron:  ( pp ! DM)
LHC:  ( pp ! DM)
LC:  ( e+e- ! DM) -
Two charged track, BG free
Guaranteed detection
S. Su
DOE Review, 2004

8. Model Independent Study of DM collider searches
J. Feng, F. Takayama (UC Irvine) -
neutral WIMP
Dark Matter (DM) relic density
Annihilation cross section:
 ( DM ! SM particle)
Production cross section:
Tevatron:  ( pp ! DM)
LHC:  ( pp ! DM)
LC:  ( e+e- ! DM) -
DM: missing energy signal
Much more difficult
Irreducible background: +jet (or )
Production cross section:
Tevatron:  ( pp ! DM+jet)
LHC:  ( pp ! DM+jet)
LC:  ( e+e- ! DM+) -
S. Su
DOE Review, 2004

9. 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
GMSB
SUGRA
S. Su
DOE Review, 2004

10. Phenomenology of Warped SUSY GUT Model
C.W. Chiang (NCU), T. Han (U. Wisconsin), L.T. Wang (Harvard) -
MSSM
SUSY SU(5) GUT
Extra-Dim 4D
SUSY
Goldberger, Nomura and Smith,
PRD67, (2003)
Nomura and Smith,
PRD 68, (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

11. Phenomenology of Warped SUSY GUT Model
C.W. Chiang (NCU), T. Han (U. Wisconsin), L.T. Wang (Harvard) -
A321,Axy
321 q ~ lL
lR ! ET + l ~ /
xy, stable,
track
S. Su
DOE Review, 2004

12. 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, (2004)
Important to understand the energy loss of stau when it penetrates the earth
Photonuclear effect
Pair production
Bremsstrahlung
dominate
S. Su
DOE Review, 2004

13. 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”
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
S. Su
DOE Review, 2004

14. Research and Collaborations-
New candidate of dark matter: superWIMP
J. Feng, F. Takayama (UC Irvine)
Model independent study of collider DM searches
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