Hadron Physics at Belle - Exotic & Hadron Spectroscopy etc. - Symposium on Hadron Physics 2014.04.17 KEK Y.Sakai

“Exotic”& New Resonances New resonances discovered at B-Factories Zb0 Z(3885) Observed >15 Exotic resonances Zb(10610),Zb(10650) hb(2S) X(3915), Y(4350) hb Charged Integrated Luminosity Yb Z(4050),Z(4250) d c u Y(4660) Y(4008) Z(4430) u c DsJ(2700) Xcx(3090) DsJ(2860) Tetraquark cluster cc2’ Neutral c g Y(4320) X(3940), Y(3940) u c Sc* baryon triplet Y(4260) X(3872) Hybrid DsJ(2317/2460) D0*0 & D1*0 hc’ & e+e-cccc Can reveal structure of exotic resonances

Variety of Processes at BF (1) B-meson decays Charmonium(-like) Charmed mesons Charmed Baryons/Pentaquark Light hadrons B(B → pX)=8% ISR e+e- annihilation A Charmonium(-like) [JPC =1- - ] (ss-bar) (l-ike) states [JPC =1- - ] Mass range 0.5 – 9? GeV

Variety of Processes at BF (2) e+e- → charmonium + X Charmonium(-like) [C= +] (ss-bar) (-like) states [C= +] X = Missing, y+Missing Tow-photon process (gg → X) A Charmonium(-like) [JPC =,0 -, 2 - ] (ss-bar) (l-ike) states [JPC =,0 -, 2 - ] Mass range 0.5 – 5? GeV

Variety of Processes at BF (4) Decays from Y(nS) Bottomonium(-like) Charmonium(-like) pair H-dibaryons Detector as target Pentaquark Strange Baryon [PLB 632, 173 (2006)] K, L beams e+e- → inclusive hadrons

New Resonances by Belle Resonance Spectrum discover by Belle Υ(４S) Υ(5S) 2003~2009.8(15 states) 2009.8~(11 states) Bottom Flavor Region Charm Flavor Region Zb0 X(3825) Z(3885)+ Z(4200)+ hb(2S)

Studies on known XYZ etc. Recent 5 years by Belle X(3872) → D*0D0 (B → X K) X(3872) → J/y g, y’ g (B → X K) Comparison of X(3872) in B+/0 → X K+/0 JPC of X(3872) (B → J/y p+p- K) (1S/2S) → X(3872) g search Zb(10610/50)+ → B*B(*) Y(4260/4360) → J/y h search (e+e- ISR) X(new) → J/y h search in B → X K (5S) → (1D) p+p- JPC of Z(4430) + (B → y’ p+ K Ang.Dalitz) (2S) → hb(1/2S) g [had.excl.] search JPC of Z(10610/50) + ((5S) →  (nS) p+p- Ang.Dalitz) Rb and  (nS) p+p- scan Z(4430) + → J/y p+ (B → J/y p+ K Ang.Dalitz)

Others on Hadron Physics Recent 5 years by Belle ISR e+e- → D0D*- p+ ISR e+e- → Ds (*+) Ds(*-) (1/2S) → excl. light hadrons gg → ff, fw [Res. structure] gg → h p0 gg → h h gg → h’p+p- [(1760), X(1835)] gg* → p0 Form Factor (1/2S) → H-dibaryon search Xcc search Xc* decays e+e- → Inclusive strange/charmed Baryons

Charmonium(-like) States Above DD threshold “Exotics” S.Olsen’s talk Below DD threshold well described by Potential model

Bottomonium(-like) States Below BB threshold well described by Potential model

Yb: Y(4260) counter part Large rate of Y(4260) → J/y p+p- Hadrons Anomalously large rates (5S) →  (nS) p+p- ~100 times larger than (1-4S) →  (nS) p+p- Peak locations are Different ?

New Energy Scan 2010 May-June run Fine Rb scan 16 new points LLWI 2014 Hadrons 2010 May-June run Fine Rb scan 16 new points for  (nS) p+p- Preliminary

New Energy Scan LLWI 2014 Preliminary (6S) II Yb’ ?

Exotic nature of “(5S) ” First Observation (5S) → hb (nP) p+p- is not suppressed ~similar to (5S) →  (nS) p+p- Similar to enhance of hc p+p- at Y(4260) CLEO [PRL107,041803 (2011)] [PRL 108, 032001 (2012)]

Charged Bottomium-like Zb+ Zb(10610)+ & Zb(10650)+ ~all hb(nP) p+p- from Zb+ p- [PRL 108, 122001 (2012)] Relative Phase of Zb’s ~180o ~BB* & B*B* threshold Relative Phase of Zb’s ~0o

IG : Neutral Partner of Zb [PRD D 88, 052016 (2013)] First observation of (5S) →  (nS)p0p0 Rates: consistent with half of (5S) →  (nS)p+p- Neutral partner in (5S) →  (nS)p0p0 6.5s significance mass 10609 4 4 MeV IG = 1+

JP of Zb(10610/10650)+ 6D Angular and Dalitz analysis of (5S) → (nS)p+p- [arXiv:1403.0992. to PRD ] D(2lnL) values Both: JP = 1+ (>6s) (3S)p+p- Zb(10610)+ region

Zb(10610/10650)+ → B*B(*) B*B(*) : Dominant decay Mode Molecule 9.3s BB B*B* 5.7s B*B(*) : Dominant decay Mode Molecule Preliminary [arXiv:1209.6450 ]

Zb(10610/10650)+ Summary Molecular Interpretation A [Bonder et al. PRD 84,054010(2011)] A IG (JP) = 1+ ( 1+ ) B*B(*) mode is dominant

Zb Family Spectroscopy

Bonus of Exotics/Anomaly (1) Large (5S) → Zb+ p- → hb (nP) p+p- Discovery of hb (nP) hb → hb g g Bottomonium study hb First Evidence ! hb(2P) → g b(2S) pNRQCD LQCD Belle 4.2 w/ syst In agreement with theory Mmiss (+-) (2) (2S) = 4  8 MeV, < 24MeV @ 90% C.L. [PRL 109, 232002 (2012)] expect 4MeV

Bonus of Exotics/Anomaly (2) ISR b(1S) b(1P) BaBar (3S)b(1S) MHF(1S) 3 arxiv:1205.6351 Belle : 57.9  2.3 MeV hb(1P) b(1S) PDG’12 : 69.3  2.8 MeV LQCD pNRQCD BaBar (3S) PRL101, 071801 (2008) BaBar (2S) ISR b(1S) BaBar (2S)b(1S) hb(2P) b(1S) CLEO (3S) PRL103, 161801 (2009) Mmiss (+-) (n) Kniehl et al, PRL92,242001(2004) CLEO (3S) Meinel, PRD82,114502(2010) [ PRL 109, 232002 (2012) ] Belle result decreases tension with theory First measurement  = 10.8 +4.0 +4.5 MeV –3.7 –2.0 PRD81, 031104 (2010) as expected

Extension to Strange quark (1) ISR e+e- → J/y p+p- [X(4260)] ; y’ p+p- [X(4360)] → f p+p- → f f0(980) 673 fb-1 Y(2175) Y(2175) m = 2079  13  MeV G = 192  23  MeV 79 28 21 61 [PRD 80, 031101 (2009)] PDG: f(2170) m = 2175  15 MeV G = 61  18 MeV BaBar [PRD 74, 091103 (2006)] CLEO [PRL 100, 102003 (2008)]

Extension to Strange quark (2) gg → J/y w [X(3915)] ; J/y f [X(4350)] → f w → f f 870 fb-1 [PRL 108, 232001(2012)] Structures in low mass region 2 - 2.3 GeV JP of structures are extracted by angular distribution w w

Baryon production in e+e- [ M. Sumihama (Hadron13), M.Niiyama(Morind QCD) ]

Belle Results: Strange Baryons Belle NPC [ M. Sumihama (Hadron13), M.Niiyama(Morind QCD) ]

Belle Results: Charmed Baryons Lc Sc [ M. Sumihama (Hadron13), M.Niiyama(Morind QCD) ]

Charmed Strange Bayons Xc First observation of Xc(3055)0 ! 980 fb-1

H-dibaryon Search (1S, 2S) decays World largest data samples tri-diquark Jaffe, PRL 38, 195 (1977) hypernucleus [PRL 110, 222002(2013)]

Summary B-Factory offers excellent Laboratory for studies of Hadron physics Exotic hadrons: started in 2003; X(3872) Many Charmonium-like exotic states observed Recently, extended to Bottomonium region and Strange quarkonium region Progress on systematic understanding Exotics Baryon studies: Strange, Charmed baryons Di-baryons Still many analyses are on going / possible More from LHC/LHCb and SuperKEKB/Belle II A

Hypothetical Exotic States Pentaquark: H-diBaryon Glueball Tetraquark mesons qq-gluon hybrid mesons u c d s _ p D0 D*0 S=+1 Baryon tightly bound 6-quark state Color-singlet multi- gluon bound state diquark-diantiquark loosely bound meson-antimeson “molecule”

Observation of (4S) → hb h at Moriond QCD

“(5S)” →  (nS) p+p- Υ(3S)π+π- Υ(2S)π+π- Υ(1S)π+π- M2(ϒπ±) π+π-

JP of Zb(10610/10650)+