????????????? K??????

1
?????????????K??????
KEK ????

• ?????????
• K???????
• ? ??????????(AMD?)????? ?
• K?????????????
• K????????
• ??????????
• ???

KEK??????? ?????????????? -?????????-? 9?13? _at_
KEK 4??3????1(345)
2
1.?????????
K?????? (K????Kaonic nuclei)
??? NZ S0
3
K??????
Kaonic atom
Kaonic nucleus
???????????

• ???????
• ??????????
• ??

??fm

• ??????
• ???????????

Atomic orbit
4
?????????
??
???
?????????????????
??
5
Kaonic hydrogen atom
K- stays on an atomic orbit around a proton.
? Exp. by M. Iwasaki (RIKEN) PRL 78,
3067(1997)
1s
Coulomb potential
KbarN potential
Kaonic hydrogen puzzle
Repulsive
6
Repulsion Strong attraction
K- p nuclear bound state ?(1405)
1s
Coulomb potential
14 keV
7
???????????????
???? KbarN potential (Akaishi-Yamazaki KbarN
potential)
Strongly attractive.

1. free KN scattering data
2. 1s level shift of kaonic hydrogen atom
3. binding energy and width of ?(1405)

K- proton
Y. Akaishi and T. Yamazaki, PRC 52 (2002) 044005
8
2.K??????? ? AMD?????? ?
??????????(AMD?)
9
Essence of AMD
AMD wave function can describe not only
shell-model-like structure but also cluster-like
one.
Gaussian wave packet
Cooling
The structure is determined by only the
energy-variation.
10
AMD??K??????
K- ??? ??????
A?????????????????? K- ??????????????
Normal nucleus
p
p
n
n
11
K?????????AMD???
K??????????I0 KbarN ??????????
?????K??????????????
12
Wave function
13
Hamiltonian in AMD calculation
effective NN int. Tamagaki potential
(OPEG)
effective KN int. AY KN potential
Y. Akaishi and T. Yamazaki, PRC 52 (2002) 044005
G-matrix method
14
AMD studies revealed

• E(K) gt 100 MeV for various light nuclei
• Drastic change of the structure of 8Be,
• isovector deformation in 8BeK-
• Highly dense state is formed in K nuclei.
• maximum density gt 4?0
• averaged density 24?0
• Proton satellite in pppK-

A. D., H. Horiuchi, Y. Akaishi and T. Yamazaki,
PLB 590 (2004) 51 PRC 70 (2004) 044313.
15
AMD studies revealed

• E(K) gt 100 MeV for various light nuclei
• Drastic change of the structure of 8Be,
• isovector deformation in 8BeK-
• Highly dense state is formed in K nuclei.
• maximum density gt 4?0
• averaged density 24?0
• Proton satellite in pppK-

A. D., H. Horiuchi, Y. Akaishi and T. Yamazaki,
PLB 590 (2004) 51 PRC 70 (2004) 044313.
16
AMD studies revealed

• E(K) gt 100 MeV for various light nuclei
• Drastic change of the structure of 8Be,
• isovector deformation in 8BeK-
• Highly dense state is formed in K nuclei.
• maximum density gt 4?0
• averaged density 24?0
• Proton satellite in pppK-

A. D., H. Horiuchi, Y. Akaishi and T. Yamazaki,
PLB 590 (2004) 51 PRC 70 (2004) 044313.
17
AMD studies revealed

• E(K) gt 100 MeV for various light nuclei
• Drastic change of the structure of 8Be,
• isovector deformation in 8BeK-
• Highly dense state is formed in K nuclei.
• maximum density gt 4?0
• averaged density 24?0
• Proton satellite in pppK-

A. D., H. Horiuchi, Y. Akaishi and T. Yamazaki,
PLB 590 (2004) 51 PRC 70 (2004) 044313.
18
3.K?????????????
?????
???????? ????????
???K?????
???????????????
????????????!?
19
3.K?????????????
?????(normal density) ?0 0.17 fm-3

• ?????????? ?? 0.5 fm??
• (?????????)

• ??????? 0.8 fm

??????? ?1 fm
?????????
20
3.K?????????????
????????????
NNKbar(???Kbar ???)???
21
3.K?????????????
????????????
NNKbar(???Kbar ???)???
K-
K-
?
2.2 MeV ??
??????
?????????????????? pn ? K- ??????????????
22
3.K?????????????
????????????
NNKbar(???Kbar ???)???
K-
K-
???
?????????????????? pn ? K- ??????????????
23
3.K?????????????
????????????
????????
Very attractive
ppK- ??? deuteron K- ????I0 KbarN?????????
?(1405)
?????????? I0 KbarN ???????? ppK- ????????
???????????ppK- ??? deuteron K- ?????????
????????? 1
Kbar????????!
????????? 0
24
4.K????????
??
ppnK- (T0) B.E. 169 MeV G lt 25 MeV
ppK- B.E. 116 MeV G 67 MeV
15OK- B(K) 90 MeV
ppnK- B.E. 150 MeV G 100MeV
25
4.K????????
??
?????????? ???10? ????! ?????? ???????!
ppnK- (T0) B.E. 169 MeV G lt 25 MeV
ppK- B.E. 116 MeV G 67 MeV
????????????? YN ?????? ??????????
?????????
???????????? ???????????? Nn????190MeV Np????1
60MeV ????KbarN?????????? T. Kishimoto et. al.
PTP118, 181(2007)
Very preliminary
ppnK- B.E. 150 MeV G 100MeV
26
4.K????????
??
??????????????? ??????????????
????????? KbarN ?????????
27
4.K????????
??
28
5.??????????
??
???????????????

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

????
?????????????? ?????????????!
??
NN ??????????????????????? ?????????????? ???YN,
YY (?????)?KbarN (K???)?? ????????
??????????????? ????!
29
6.???

• K ?????? K- ??????????????????????????
• ?????????????????????????

• KbarN ???? ???????????????????? 0 ????????

• ?????????? (AMD ?)????KbarN ????????????

?????????????????????!

• ????????????
• ?????????????????????

30
6.???

• ????????????K???????????????

• ???? KbarN ???????

• Non-mesonic decay (KbarNN ? YN ?????)???????

?????? Mesonic decay (KbarN ? Yp ?????)???????
???????????K??? ppK- ??????????????

• ?? ?????????????

J-PARC???!
3He (inflight-K-, n) ppK- ? p ?
31
Kbar nuclei Exotic system !
KbarN interaction
?(1405)
??????????
Kaonic atom
K??
Cold and Dense
Strange quark matter
????????????
related to various fields