Post on 01-Jan-2016
description
Jung Keun Ahn @ PNU
Exotic Hadron Spectroscopy@ J-PARC
HaPhy 2005.10.8
Exotic BaryonPentaquarks
New
S
earc
hes
J-PA
RC
Ou
tlook
Quantum # cannot be matched by qq’q”.
For SUf(3) , qqq generates
3 x 3 x 3 = 1 + 8s + 8a + 10
For meson-octet +baryon-octet,
8 x 8 = 1 + 8 + 8 + 10 + 10 + 27
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
=20 MeV=1 MeV
K+d and K+n
Exotic BaryonsExotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Exotic BaryonsExotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Pentaquark +
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
nK+
0spK
Null ResultsExotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Null Results Need High Stat
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
HERA-
B
PHENIX
Disappeared?Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Very preliminary
KEK-E522
~2mb
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
KEK-PS K2 Beam Line
1.66 GeV/c K-
1.9 GeV/c - +
N(2400)+K-Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
γ
p/nn/p
K+/K0
MMd(γ,K － p) GeV/c2
Quasi-free and non-resonant KKp
Bump structure
γd+ (1520) @ LEPS
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Decay modes studied: Θ+→K0p Λ→pπ- K0 → π+π- Θ+→K+n Λ→pπ-
(n)
(K+)
CLAS very preliminary
Eγ = 0.8 – 1.55 GeV
1) ppπ+π- ()
2) ppπ-π+π- (p)
3) ppπ-K+ (n) (Θ→nK+)
Possible final states:
Search for γ3He→ΛΘ+p
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
(1530)
− −
M=1.862± 0.002 GeV
<0.018 GeV
CERN SPS hep-ex/0310014
udssd
dussd
dudss
uddss
0
Combined spectra
- - @ NA49 @ CERN
Negative Results
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
WA89 +A @ 340 GeV/c.
Also not seen by CDF, BaBar, ZEUS, ALEPH and E690.
Exp Evidence for N*
Exotic
B
ary
on
sN
ew
S
earc
hes
J-PA
RC
Ou
tlook
GRAAL γnn
N(1680)
N(1730)
New Exotic BaryonsPentaquarks
New
S
earc
hes
J-PA
RC
Ou
tlook
PentaquarksN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Further exotics from STAR and CLAS
Kp
Invariant Mass (GeV/c2)
Invariant Mass (GeV/c2)Invariant Mass (GeV/c2)
pK
S. Kabana, AGS&RHIC Users Meeting
M. Bttaglieri, JLAB Users MeetingJune 16, 2004
Search for ++, 5, 5 in JLab
PentaquarksN
ew
S
earc
hes
J-PA
RC
Ou
tlook
simulation
Search for *++ partners in ep e’K-X++
Search for 5 in ep eK+Xo
Search for - in γpK+K+-
-(1862)
Excited States of the +
PentaquarksN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Spin-flavor partners, T = 1, JP = 3/2+, to the + are predicted at slightly higher masses than the +.
γp K+n) K0 (+ -) Eγ < 2.2 GeV cosCM(K0) < -0.35
very preliminary
Mass = 1523 +/- 5 MeVFWHM ~ 9 MeV
Mass = 1573 +/- 5 MeVFWHM ~ 9 MeV
γp K+ + - (n)
cos CMK0
<- 0.35
N (1523) ~ 160
N (1573) ~ 300
simulatio
n
JLab–G11 run
X(2000) and (3170)Pentaquarks
New
S
earc
hes
J-PA
RC
Ou
tlook
• pN X(2000)N0K+ N @ 70 GeV
• uudss pentaquark? SPHINX @ ITEP
• K-p (3170)- KK- @6.5, 8.25 GeV
• uusss pentaquark? CERN and Argone BC
K-p--(1860)K++
@ 2.87 GeV/c BNL-HBC
PentaquarksN
ew
S
earc
hes
J-PA
RC
Ou
tlook
• Complete kinematics, pK > 2.63 GeV/c• K-p-(1820)K+-+-K+
PentaquarksN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Hyperon Resonances
Low Energy Hyperon Beam S=-3 Hypernuclei Hyperon Resonances 6 GeV/c K beam for 2.5 GeV/c2 Y* Production
3 x 3 x 3 = 10 + 8 + 8a + 1
=
(# of N* = 14)
J-PARCPentaquark
New
S
earc
hes
J-PA
RC
Ou
tlook
Beam Intensity
PentaquarkN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Requirements
PentaquarkN
ew
S
earc
hes
J-PA
RC
Ou
tlook
High-p BeamlinePentaquark
New
S
earc
hes
J-PA
RC
Ou
tlook
Spectrometer Pentaquark
New
S
earc
hes
J-PA
RC
Ou
tlookSPring-8
0 1 2 3 4 5 6 7 8 9 10
p
P (GeV)
e
k
TOFCERENKOV
TOF CERENKOV
CERENKOV
CALORIMETER
HARP @ CERN-PS Pentaquark
New
S
earc
hes
J-PA
RC
Ou
tlook
PentaquarkN
ew
S
earc
hes
J-PA
RC
Ou
tlook
Korea Beamline @ J-PARC
11
22
33
44
2005
2006?
K 1.1/0.8 Beamline or High-p Beamline
2-year Design + 3-year Construction
$ 15M (½ Beamline + ½ Experiment)½ Cost for the Construction
Korea
3~4 Exp Proposals + Beamline Proposal
2006.3