Jung Keun PNU Exotic Hadron J-PARC HaPhy

Exotic Baryon Pentaquarks New Searches J-PARC Outlook Quantum # cannot be matched by qq’q”. For SU f (3), qqq generates 3 x 3 x 3 = 1 + 8s + 8a + 10 For meson-octet +baryon-octet, 8 x 8 = 

Exotic Baryons New Searches J-PARC Outlook

Exotic Baryons New Searches J-PARC Outlook  =20 MeV  =1 MeV K + d and K + n

Exotic Baryons New Searches J-PARC Outlook

Exotic Baryons New Searches J-PARC Outlook

Pentaquark  + Exotic Baryons New Searches J-PARC Outlook nK +

Null Results Exotic Baryons New Searches J-PARC Outlook

Null Results Need High Stat Exotic Baryons New Searches J-PARC Outlook HERA-B PHENIX

Disappeared? Exotic Baryons New Searches J-PARC Outlook

Very preliminary KEK-E522  ~2mb Exotic Baryons New Searches J-PARC Outlook KEK-PS K2 Beam Line 1.66 GeV/c K- 1.9 GeV/c  - ++

N(2400)   +K- Exotic Baryons New Searches J-PARC Outlook

Exotic Baryons New Searches J-PARC Outlook  p/n n/p  K + /K 0  MMd(γ,K － p) GeV/c 2 Quasi-free  and non- resonant KKp   Bump structure  d   +  LEPS

Exotic Baryons New Searches J-PARC Outlook Decay modes studied: Θ + →K 0 p Λ→pπ - K 0 → π + π - Θ + →K + n Λ→pπ - (n) (K + ) CLAS very preliminary E  = 0.8 – 1.55 GeV 1) ppπ + π - (  ) 2) ppπ - π + π - (p) 3) ppπ - K + (n) (Θ→nK + ) Possible final states: Search for γ 3 He→ΛΘ + p

Exotic Baryons New Searches J-PARC Outlook  (1530)  − − M=1.862± GeV  <0.018 GeV CERN SPS hep-ex/ 00 Combined spectra  - CERN

Negative Results Exotic Baryons New Searches J-PARC Outlook WA89   340 GeV/c. Also not seen by CDF, BaBar, ZEUS, ALEPH and E690.

Exp Evidence for N* Exotic Baryons New Searches J-PARC Outlook GRAAL  n   n N(1680) N(1730)

New Exotic Baryons Pentaquarks New Searches J-PARC Outlook

Pentaquarks New Searches J-PARC Outlook Further exotics from STAR and CLAS Invariant Mass (GeV/c 2 ) S. Kabana, AGS&RHIC Users Meeting M. Bttaglieri, JLAB Users Meeting June 16, 2004

Search for  ++,  5,  5  in JLab Pentaquarks New Searches J-PARC Outlook simulation  Search for  * ++ partners in ep  e’K - X ++  Search for  5 in ep  eK + X o  Search for  - in  p   K + K +  -  - (1862) 

Excited States of the  + Pentaquarks New Searches J-PARC Outlook  Spin-flavor partners, T = 1, J P = 3/2 +, to the  + are predicted at slightly higher masses than the  +.  p  K + n) K 0 (  +  - ) E g < 2.2 GeV cos CM (K 0 ) <   very preliminary   Mass = /- 5 MeV FWHM ~ 9 MeV Mass = /- 5 MeV FWHM ~ 9 MeV  p  K +  +  - (n) cos CM K 0 < N (1523) ~ 160 N (1573) ~ 300 simulation JLab–G11 run

X(2000) and  (3170) Pentaquarks New Searches J-PARC Outlook pN  X(2000)N   0 K + 70 GeV uudss pentaquark? ITEP K-p   (3170)  -   KK  8.25 GeV uusss pentaquark? CERN and Argone BC

K - p   -- (1860)K +  2.87 GeV/c BNL-HBC Pentaquarks New Searches J-PARC Outlook Complete kinematics, p K > 2.63 GeV/c K - p   - (1820)K +   -  +  - K +

Pentaquarks New Searches J-PARC Outlook Hyperon Resonances Low Energy Hyperon Beam S=-3 Hypernuclei Hyperon Resonances  6 GeV/c K beam for 2.5 GeV/c 2 Y* Production 3 x 3 x 3 = a + 1 =    (# of N* = 14)

J-PARC Pentaquark New Searches J-PARC Outlook

Beam Intensity Pentaquark New Searches J-PARC Outlook

Requirements Pentaquark New Searches J-PARC Outlook

High-p Beamline Pentaquark New Searches J-PARC Outlook

Spectrometer Pentaquark New Searches J-PARC Outlook SPring  p P (GeV)  e  k TOF CERENKOV TOF CERENKOV CALORIMETER

CERN-PS Pentaquark New Searches J-PARC Outlook

Pentaquark New Searches J-PARC Outlook Korea J-PARC ? 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