???

1
?????????

• ?? ? (???????) _at_ ????
• ??????????????????????????

2005/9/20
hep-ph/0507245
With ? ??(????Harvard Univ.) ??? ??(???)
2
Introduction

• TeV physics?????

• fine tuning problem
• gauge coupling unification
• Dark Matter

????
???????

• ??????????????????

• ??????

Super particles

• ???(LHC,ILC)

Lightest susy particles (LSP)

• Dark Matter ???

Gravitino(gravitino problem)

• Cosmology

• Gravitino LSP

this talk

• Gravitino non LSP

3
Introduction

• ?????????????

• ??????????

• ??????????

• BBN??????

????????????

• ??????

?????????? ????
????????????????
4
Plan of this talk
1. ?????????
2. ?????????
3. ???????????????????
4. ??????????
5. Result
6. ??
5
?????????
6
Gravitino

• ????

??????
???
????
?????
?????
??????
????????
?????

• ???????

??????????????
????????????????????????
e.g.)
Gravity med.
Anomaly med.
Gauge med.
7
Gravitino problem
S.Weinberg (1982)

• gravitino ????????????????(Planck suppress)

gravitino ?????????
8
Abundance of Gravitino
M.Kawasaki, T.Moroi (1995) M.Bolz, A.Brandenburg,
W.Buchmuller (2001)

• Inflation

Gravitino ???????

• After inflation

• ??????????????????????????????

e.g.)
Gravitino ???????????????BBN?????????????????????
????????????
9
???????? ???????????
10
Standard BBN
Deuterium
Herium-4
Herium-3
Lithium-7
Lithium-6
Kawasaki, Kohri, Moroi(2004)
11
Effects of the Gravitino decay on the BBN
Hadron Production
Lepton
B B N
Photon
SM particle
Quark
Hadrons
Gluon
Gravitino
SUSY particle
LSP
Photo-dissociation
Ellis, Gelmini, Lopez, Nanopoulos, Sarkar
(1992) Kawasaki, Moroi (1995) Holtmann, Kawasaki,
Kohri, Moroi (1999)
Hadro-dissociation P N Conversion
Dimopoulos, Esmailzadeh, Hall, Starkman
(1987) Reno, Seckel (1988) Kawasaki, Kohri,
Moroi(2004) Jedamzik(2004)
12
Photo-dissociation
?????????
??????photon
????????????

• ???????????photon???????

• Threshold energy for each reactions

?photo-dissociation??????
13
Hadro-dissociation
?????????
?????? P,N
????????????

• P,N???????? ??????????????????????????????

?????????????????????????????????
???
??
Kawasaki, Kohri, Moroi(2004)
14
Hadro-dissociation

• ????????????? ???????????????

elastic
inelastic
??????
elastic
inelastic
15
P N conversion

• 
  ???????????????????????

???

• 
  ????????????4??????

??????
16
??????????
17
Effects of the Gravitino decay on the BBN
Hadron Production
Lepton
B B N
Photon
New!
SM particle
Quark
Hadrons
Gluon
Gravitino
SUSY particle
LSP
Photo-dissociation
Ellis, Gelmini, Lopez, Nanopoulos, Sarkar
(1992) Kawasaki, Moroi (1995) Holtmann, Kawasaki,
Kohri, Moroi (1999)
Hadro-dissociation P N Conversion
Dimopoulos, Esmailzadeh, Hall, Starkman
(1987) Reno, Seckel (1988) Kawasaki, Kohri,
Moroi(2004) Jedamzik(2004)
18
Gravitino decay

• Gravitino interaction

• ???????????????????????
• super-current??????????

???????????????????????????
????? ??
Gravitino
19
Hadronization and jet particle dependence
Number of hadrons produced by each one jet pair
using Monte Carlo simulation, PYTHIA6.226
Hadronic effects on the BBN
20
Result
21
Points

• Gravitino ???????SUSY?????????????

• mSUGRA????? ? ????????????
• ???4???????????

?????LSP??????DM??????????
22
Branching ratio
Independent of susy parameter
dependent of susy parameter
23
Result (case 1)
Susy parameter dependent region
Susy parameter independent region
Photodissociation
Hadorodissociation
p n conversion
24
Results (all)

• ????????

• ????gravitino????
• ??SUSY?????? ????????????
  10??????????
• ?????????

25
Conclusion

• My study

• ???SUSY???????gravitino??????BBN
  ???????????????????

• ?????????gravitino???????????? decay chain,
  hadronization???????

• Result

• ???SUSY????????????????????
  ???????????????????????

• ???gravitino????????????????????
  ???????210?????????