Download - Strange Tribaryons as Nona-quarks
![Page 1: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/1.jpg)
Strange Tribaryons as Nona-quarks
Yuu Maezawa (Univ. Tokyo)
Tetsuo Hatsuda (Univ. Tokyo)
Shoichi Sasaki (RIKEN BNL)
hep-ph/0412025
![Page 2: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/2.jpg)
IntroductionIntroduction
Spin and Parity are undetermined.
Strange tribaryon @KEK-PS
T. Suzuki et al. Phys. Lett. B 597 (2004) 263
M. Iwasaki et al. hep-ph/0310018
![Page 3: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/3.jpg)
(i) High density puzzle
NNNK 3310 MeV
TheoryppnK
(ii) Isospin puzzle
-110 MeV
)3140(S
)3115(0SppnK
pnnK
High central
Density 010~
)channel 0(- IpKStrong attraction
Akaishi and Yamazaki PRC65 (`02) 044005Dote, Horiuchi, Akaishi and Yamazaki, PRC70 (`04) 044313Hadronic pictureHadronic picture
state bound )1405( NK
I=0 I=1
Exp.Model
?
![Page 4: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/4.jpg)
Nona-quark pictureNona-quark picture
uuudddddspnnKS :0
Nona-quark picture
0S
Possible other nona-quark states
Classification in color, flavor and spin space
Mass formula based on MIT bag model
flavor 27-plet
![Page 5: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/5.jpg)
irreducible representation in flavor spin space
Classification in color, flavor and spin spaceClassification in color, flavor and spin spaceAll quarks are in lowest orbital angular momentum.
Degrees of freedom of nona-quark system
anti-symmetriccolor-singlet
![Page 6: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/6.jpg)
Possible multiplets for and )3140(S)3115(0S)1,1(),(0 ISS
)1or 0,1(),( ISS
plet-27 -plet*35
0SSS
S
I3
1
![Page 7: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/7.jpg)
Mass formulaMass formula (Bag model)(Bag model)Aerts et al., PRD 17 (1977) 260.
Constant independent of quantum numbers
Adjusted to reproduce )3115(0S
breaking effect)3(FSU
More strange-quarks Larger mass
spin
Color-magnetic int. effect
flavor multipletLarger Larger mass
![Page 8: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/8.jpg)
small
Parameters
MeV 285Sm• strange quark mass octet baryon
• bag radius 34/1
3 RR NN fm 13 R fm 3.19 R
• strong coupling constant 2.0 and 0.1S
![Page 9: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/9.jpg)
strange mass effect+ flavor dependent effect by CM-int.+ spin, isospin effects
)21,1,27(),,( JIF
MeV21
(due to compact 9-quark structure?)
)3115(0S
Masses of strange tribaryonMasses of strange tribaryon
![Page 10: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/10.jpg)
0S
)3115( vs)3140( 0SS
Case 1 state)21,0*,35(
Case 2 state)21,1,27(
isospin partner of S 0S
MeV 00 SS
Case 3 state)23,1,27(
MeV40200 SS
spin splitting of CM-int.
Too large ?
Too small ?
![Page 11: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/11.jpg)
Nona-quark picture vs. hadronic pictureNona-quark picture vs. hadronic picture
0S
(i) High density puzzle
NOT a puzzle in the quark picture
(ii) Isospin puzzleNOT a puzzle in Case 1,2,3
Not seen yet ?
system ppnK
![Page 12: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/12.jpg)
Other light nona-quarks ?Other light nona-quarks ?largeS Small flavor multiplets
are allowed.Color-magnetic int. small.
0.2S 0.1S
![Page 13: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/13.jpg)
Strangeness tribaryon nona-quark description
Classification in flavor-spin space and mass formula
is identified as
Three possible interpretations of are given.
other light nona-quark states?
SummarySummary
0S )2/1,1,27(),,( JIF
Narrow decay width ( < 21 MeV)
Other interactions (Meson cloud, Instanton induced int. …)
S
Future problems
3for )2/3,1,1(
2for )2/1,2/1,8(
1for )2/1,0*,10(
S
S
S
![Page 14: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/14.jpg)
Back up slides
![Page 15: Strange Tribaryons as Nona-quarks](https://reader035.vdocuments.net/reader035/viewer/2022062322/5681462f550346895db33f36/html5/thumbnails/15.jpg)
Masses of strange tribaryonMasses of strange tribaryon
ColorMagneticInt.
strange mass effect flavor dependent effect in CM-int.