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New particle spectroscopy update

International Conference for High Energy Physics, 4-12 July 2012, Melbourne. New particle spectroscopy update. Roman Mizuk ITEP, Moscow. Spectroscopy results @ ICHEP2012 (1). BESIII. Precise measurement of  c ,  c ’ , h c parameters New decay modes of J/ , ’ ,  cJ ,  c

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New particle spectroscopy update

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  1. International Conference for High Energy Physics, 4-12 July 2012, Melbourne New particle spectroscopy update Roman Mizuk ITEP, Moscow

  2. Spectroscopy results @ ICHEP2012 (1) BESIII Precise measurement of c , c’ , hc parameters New decay modes of J/ , ’ , cJ , c PWA J/   pp PWA J/    PWA J/    Confirmation of X(1835) in J/   +-’, +two new First observation of isospin violating mode (1405)  f0(980)0 First observation of ’  c’  Shan Jin Todyshev KEDR Precise measurement of (2S) and (3770) parameters BaBar Study of   c(1S) +– Update on Y(4260) using e+e-  J/+– Confirmation of Y(4660) using e+e-  (2S)+– Confirmation of   X(3915)  J/ Search for charged Z+ states in B c1 K Precise measurement of D* width Santoro

  3. Spectroscopy results @ ICHEP2012 (2) BELLE Evidence for resonant structures in   , ,  Study of   ’+- First evidence for 2 Search for X(3872)C– in B  (J/) K decays Study of e+e-  J/ Amplitude analysis of B  J/K Measurement of BF[ (2S) (1S)  ] First observation of (1S,2S)  light hadrons Search for (2S)  baryon pairs Search for bJ  double charmonium Search for 5– – pentaquark and H dibaryon in (1S,2S) decays Rb scan First evidence for b(2S) Observation of Zb(10610)  BB* and Zb(10650)  B*B* Evidence for Zb0 Observation of (5S) (1S,2S)  and (5S) (1D) +– Nakazawa Yabsley Barrett Bondar

  4. Spectroscopy results @ ICHEP2012 (3) CDF Observation of b0 Evidence for P-wave b* resonance Gorelov Buszello D0 Observation of Xb  (1S) ATLAS First observation of b(3P)Masses and life-times of b-hadrons Toms CMS First observation of b* baryonc2/c1 cross-section ratio, (nS) cross-section Kai Yi Märki LHCb First observation of P-wave excited b* resonances b-baryons mass measurements Study of DsJ My talk: Heavy quarkonium (-like) states New baryons Apologies: time is limited so I cannot cover all results

  5. – c π c π -- 1 Introduction Charmonium & bottomonium played important role in establishing QCD as theoryof strong interactions (11020) 11.00 Quark Model successfully describes + spectrum + annihilation widths + radiation widths (10860) 10.75 Zb (4S) 2M(B) (2D) 10.50 Breakdown for high excitations (3S) b(3S) Mass, GeV/c2 b(2P) hb(2P) – new dynamics ? – exotic states? (not qq or qqq) _ 10.25 (1D) (2S) b(2S) 10.00 b(1P) hybrid tetraquark hb(1P) 9.75 (1S) 9.50 molecule hadrocharmonium b(1S) - - -- JPC = 0+ 1+ (0,1,2)++ (0,1,2) P = (-1) L+1 C = (-1) L+S

  6. - - -- JPC = 0+ 1 1 + Observation of hb(1P,2P) e+e-(5S)  hb(nP) +– reconstructed, use Mmiss(+-) (Pe+e- – P+-)2 (11020) 11.00 (10860) PRL108,032001(2012) +- 10.75 raw distribution (4S) 2M(B) hb(2P) 10.50 (3S) b(3S) residuals b(2P) hb(1P) hb(2P) 10.25 (2S) b(2S) b(1P) 10.00 hb(1P) MHF(1P) 9.75 Belle arxiv:1205.6351 MHF(1P) = +0.8  1.1 MeV MHF(2P) = +0.5  1.2 MeV (1S) consistent with zero, as expected 9.50 b(1S) (0,1,2)++ Large hb(1,2P) production rates c.f. CLEO e+e- (4170)  hc +-

  7. - - -- JPC = 0+ 1 1 + Observation of hb(1P,2P) e+e-(5S)  hb(nP) +– reconstructed, use Mmiss(+-) (Pe+e- – P+-)2 (11020) 11.00 (10860) PRL108,032001(2012) +- 10.75 raw distribution (4S) 2M(B) hb(2P) 10.50 (3S) b(3S) residuals b(2P) hb(1P) hb(2P) 10.25 19% (2S) b(2S) b(1P) 10.00 hb(1P) 13%  9.75 41% Belle arxiv:1205.6351 MHF(1P) = +0.8  1.1 MeV MHF(2P) = +0.5  1.2 MeV (1S) consistent with zero, as expected 9.50 b(1S) (0,1,2)++ Large hb(1,2P) production rates c.f. CLEO e+e- (4170)  hc +- hb(nP) decays are a source of b(mS)

  8. e+e-(5S)hb(nP) +–  b(1S)  (11020) 11.00 (10860) +- 10.75 (4S) 2M(B) 10.50 (3S) b(3S) b(2P) hb(2P) 10.25 (2S) b(2S) b(1P) 10.00 hb(1P) Observation of hb(1P,2P) b(1S)  9.75 Mmiss (+-) (n) (1S) 9.50 b(1S) - - First measurement  = 10.8 +4.0+4.5 MeV -- JPC = 0+ –3.7 –2.0 (0,1,2)++ 1 1 + reconstruct MHF(1S) Belle : 57.9  2.3 MeV 3 arxiv:1205.6351 PDG’12 :69.3  2.8 MeV hb(1P) b(1S) BaBar (3S) BaBar (2S) hb(2P) CLEO (3S) b(1S) pNRQCD LQCD   Kniehl et al, PRL92,242001(2004) Meinel, PRD82,114502(2010) MHF(1S) Belle result decreases tension with theory as expected

  9. e+e-(5S)hb(nP) +–  b(1S)  Observation of hb(1P,2P) b(1S)  Mmiss (+-) (n) First measurement  = 10.8 +4.0+4.5 MeV –3.7 –2.0 PRL101, 071801 (2008) reconstruct MHF(1S) BaBar (3S)b(1S) Belle : 57.9  2.3 MeV ISR arxiv:1205.6351 PDG’12 :69.3  2.8 MeV b(1S) hb(1P) b(1S) b(1P) PRL103, 161801 (2009) BaBar (2S)b(1S) hb(2P) b(1S) ISR b(1S) pNRQCD LQCD Kniehl et al, PRL92,242001(2004) Meinel, PRD82,114502(2010) PRD81, 031104 (2010) Belle result decreases tension with theory CLEO (3S) as expected

  10. e+e-(5S)hb(2P) +–  b(2S)  First evidence for b(2S) Mmiss (+-) (2) MHF(2S) = 24.3 +4.0MeV –4.5 First measurement arxiv:1205.6351 PRL LQCD pNRQCD b(2S) Belle 4.2w/ syst In agreement with theory (2S) = 4  8 MeV, < 24MeV @ 90% C.L. expect 4MeV Branching fractions Expectations 41% 13% 19% BF[hb(1P)  b(1S) ] = 49.25.7+5.6 % BF[hb(2P)  b(1S) ] = 22.33.8+3.1 % BF[hb(2P)  b(2S) ] = 47.510.5+6.8 % –3.3 –3.3 Godfrey Rosner PRD66,014012(2002) –7.7 c.f. BESIII BF[hc(1P)  c(1S) ] = 54.38.5 % 39%

  11. (11020) 11.00 (10860) 10.75 (4S) 2M(B) 10.50 (3S) b(3S) b(2P) hb(2P) 10.25 Mass, GeV/c2 (2S) b(2S) b(1P) 10.00 hb(1P) Large production rate: N b(2S)  0.2 N b1 factor 30 9.75 c.f.(’c(2S)) = 0.007 (’c1) “Signal” of exclusively reconstructed b(2S) BESIII arxiv:1205.5103 PRL (1S) 9.50 Large MHF(2S) CLEO48.72.7 MeV Belle b(1S)  strong disagreement with theory  strong disagreement with theory 5σ 24.3 +4.0 MeV 24.3 +4.0 MeV  agrees with theory  agrees with theory (0,1,2)++ –4.5 –4.5 - - -- JPC = 0+ 1 1 + CLEO data Dobbs, Metreveli, Seth, Tomaradze, Xiao, arxiv:1204.4205 _ e+e- (2S)  b(2S) , b(2S)  4,6,8,10 , K, p/p (26 channels) 4.6 Issues  Bg from final state radiation can mimic signale.g. (2S)  K+K- n(+-) FSR power law tail instead of exponential not discussed hadrons Reported excess is unlikely to be the b(2S) signal

  12. (11020) 11.00 (10860) +- 10.75 (4S) 2M(B) 10.50 (3S) b(3S) b(2P) hb(2P) 10.25 (2S) b(2S) b(1P) 10.00 hb(1P) 9.75 Observation of b(3P) (1S) 9.50 b(1S) (0,1,2)++ - - -- JPC = 0+ 1 1 + [Buszello] b(3P) (1,2S) +-   conversion to e+e- Observed by ATLAS confirmed by D0 Spin-averaged M[b(3P)] ATLAS 10530  9  5 MeV D0 10551  14 17 MeV theory 10525 In agreement with theoretical expectations

  13. Charged bottomonium-like states

  14. _ Anomalies in (5S)  (bb) +– transitions -- 1 [Bondar] (11020) Belle PRL100,112001(2008) 100 11.00 [(5S) (1,2,3S) +–]>> [(4,3,2S) (1S) +–] (10860) _ +– Rescattering of on-shell B(*)B(*) ? 260 10.75 (4S) 2M(B) 2 330 10.50 (3S) Mass, GeV/c2 hb(2P) 430 10.25 1 190 (2S) b(2S) 10.00 hb(1P) 290 6 Belle PRL108,032001(2012) 9.75 (5S)  hb(1,2P) +– are not suppressed partial (keV) expect suppression QCD/mb (1S) 9.50 b(1S) spin-flip Heavy Quark Symmetry - - JPC = 0+ 1+

  15. _ Anomalies in (5S)  (bb) +– transitions -- 1 [Bondar] (11020) Belle PRL100,112001(2008) 100 11.00 [(5S) (1,2,3S) +–]>> [(4,3,2S) (1S) +–] (10860) _ + Zb – Rescattering of on-shell B(*)B(*) ? 260 10.75 (4S) 2M(B) 2 10.50 + (3S) Mass, GeV/c2 hb(2P) 430 10.25 1 (2S) b(2S) 10.00 hb(1P) 290 6 Belle PRL108,032001(2012) 9.75 (5S)  hb(1,2P) +– are not suppressed partial (keV) expect suppression QCD/mb (1S) 9.50 b(1S) spin-flip Heavy Quark Symmetry - - JPC = 0+ 1+ hb production mechanism? Study resonant structure in hb(mP) +–

  16. _ _ _  bbud  Resonant structure of (5S)  (bb) +– Belle PRL108,122001(2012) (5S) hb(1P)+- (5S) hb(2P)+- no non-res. contribution Two peaks in all modes phsp Minimal quark content phsp flavor-exotic states M[ hb(1P) π] M[ hb(2P) π] Dalitz plot analysis (5S) (1S)+- (5S) (2S)+- (5S) (3S)+- note different scales

  17. ’  Zb  B B*  =  +  B*B*  =  –  Zb Fit results Average over 5 channels M1 = 10607.2  2.0 MeV 1= 18.4  2.4 MeV MZb – (MB+MB*) = + 2.6  2.1 MeV M2 = 10652.2  1.5 MeV 2= 11.5  2.2 MeV MZb’ – 2MB* = + 1.8  1.7 MeV Angular analysis both states are JP = 1+ Decays IG = 1+ (C= –) Bondar et al, PRD84,054010(2011) Zb  Proximity to thresholds favors molecule over tetraquark hb(mP) S-wave not suppressed Zb’  ’ Phase btw Zb and Zb amplitudes is 0o for (nS) and 180o for hb(mP)

  18. ’  Zb  B B*  =  +  = 0o 180o (2S) hb(1P)  B*B*  =  – hb(1P) yield / 10MeV ’ Phase btw Zb and Zb amplitudes is 0o for (nS) and 180o for hb(mP) M(hb), GeV/c2  Zb Fit results Average over 5 channels M1 = 10607.2  2.0 MeV destr. interf. 1= 18.4  2.4 MeV MZb – (MB+MB*) = + 2.6  2.1 MeV M2 = 10652.2  1.5 MeV 2= 11.5  2.2 MeV MZb’ – 2MB* = + 1.8  1.7 MeV Angular analysis both states are JP = 1+ Decays IG = 1+ (C= –) Bondar et al, PRD84,054010(2011) Zb  Proximity to thresholds favors molecule over tetraquark hb(mP) S-wave not suppressed Zb’  Resonant behavior of Zb amplitudes (intensity & phase). Properties of Zb states are consistent with molecular structure.

  19. ’  Zb Mass above threshold ? _  B B*  =  + If Zb can decay to B(*)B* its lineshape is asymmetric this can shift the mass to slightly below threshold  = 0o 180o (2S) hb(1P)  B*B*  =  – Cleven et al, EPJA47,120(2011) hb(1P) yield / 10MeV ’ Phase btw Zb and Zb amplitudes is 0o for (nS) and 180o for hb(mP) M(hb), GeV/c2  Zb Fit results Average over 5 channels M1 = 10607.2  2.0 MeV destr. interf. 1= 18.4  2.4 MeV MZb – (MB+MB*) = + 2.6  2.1 MeV M2 = 10652.2  1.5 MeV 2= 11.5  2.2 MeV MZb’ – 2MB* = + 1.8  1.7 MeV Angular analysis both states are JP = 1+ Decays IG = 1+ (C= –) Bondar et al, PRD84,054010(2011) Zb  Proximity to thresholds favors molecule over tetraquark hb(mP) S-wave not suppressed Zb’  Resonant behavior of Zb amplitudes (intensity & phase). Properties of Zb states are consistent with molecular structure.

  20. Zb Zb’ _ _ _ _ _ B(*) B(*) B(*) B(*) B(*) Origin of structure at threshold 1. Threshold effect Chen Liu PRD84,094003(2011) Pronounced structures and fast change of phase are not typical ?   B(*) B(*) (2S) (5S) S-wave M [(2S)π] Danilkin Orlovsky Simonov PRD85,034012(2012) 2. Coupled-channel resonancemultiple re-scatterings  pole Zb     B(*) B(*)  B(*) Zb’ + + ... (5S) (2S) (2S) (2S)   B(*) 3. Deuteron-like molecule Ohkoda et al arxiv:1111.2921 ,,, exchange  (5S) (2S) Fit data to various predictions

  21. _ _ BF[ (5S)  B(*)B(*) ] Study e+e-  (5S)  B(*)B(*) [Bondar] _ _ preliminary Search for Zb BB* and B*B* NEW! Full reconstruction of one B _ BB* M(B) Mmiss(B) _ BB _ B*B* preliminary PRD81,112003(2010) Belle 121.4 fb-1 significance Belle 23.6 fb-1 _ (0  1.2) % (7.3  2.3) % (1.0  1.4) % BB BB* + BB* B*B* <0.60 % at 90% C.L. (4.25  0.44  0.69) %(2.12  0.29  0.36) % _ _ _ _ 9.3 5.7 _ BFs are consistent with previous measurement

  22. _ _ _ _ Zb’  BB* is suppressed w.r.t. B*B*despite larger PHSP _ Molecule admixture of BB* in Zb’ is small Observation of ZbBB* and Zb’B*B* [Bondar] preliminary NEW! _ M (BB*) Zb 8 Challenging for tetraquark Zb’ ? phsp _ M (B*B*) Zb’ 6.8 phsp Crucial input for the models

  23. NEW! (2S) 00 : Zb(10610)05.3 (4.9 w/ syst.) Zb(10650)0 2 Evidence for a neutral Zb partner [Bondar] preliminary (2S) e+e-  (5S)  (nS)00 (1S) BF[(5S)(1S)00] = (2.250.110.20) 10-3 BF[(5S)(2S)00] = (3.790.240.49) 10-3 in agreement with isospin relations M miss (0 0) Dalitz plot analysis of (1S,2S)00 w/o Zb w/ Zbs (1S) 00 : Zb signals not significant Yields agree with isospin expectations Confirmation that Zb is an isotriplet M [(2S)0 ]

  24. Charmonium (-like) states

  25. Y(4660) Z(4430)+ Y(4360) Z(4250)+ Y(4260) X(4160) X(3872) Y(3940) Z(4050)+ Y(4008) _ X(3940) DD 2(3820) JPC Charmonium table (Recently observed) Charmonia with conventional properties _ all states below DD threshold are observed XYZ states with anomalous properties

  26. Y(4660) Z(4430)+ Y(4360) Z(4250)+ Y(4260) X(4160) X(3872) Y(3940) Z(4050)+ Y(4008) _ X(3940) DD 2(3820) JPC Evidence for new charmonium state [Yabsley] preliminary B  (c1 ) K 2(1D) 4.2 w/ syst. M (c1 ), GeV M = 3823.5  2.8 MeV  = 4  6 MeV C = – Expectations Radiative decay is seen O(10keV) _ 2– –  DD is forbidden (unnatural spin-parity)  small   c1 is prominent (E1) _ Evidence for 2(1D) candidate 3– –  DD is allowed  O(10MeV)  c1 is suppressed (E2) L=2 S=1  c2 is allowed (E1) , but small – not found

  27. Y(4660) Z(4430)+ Y(4360) Z(4250)+ Y(4260) X(4160) X(3872) Y(3940) Z(4050)+ J/  J/  J/  D0D*0 Y(4008) _ X(3940) DD 2(3820) _ JPC X(3872) Discovery by Belle 2003 Studied also by CDF,D0, BaBar,LHCb,CMS PDG’12 MX(3872) –(MD0 + MD*0) = -0.16 ± 0.32 MeV _ Relative BF 1 0.8  0.3 0.21  0.06 10 isospin violation   is O(10keV) Most likely interpretation: DD* molecule with admixture of c1(2P) production athigh energy isospin violation Urgent issues : JPC = 1++or2–+ ? absolute BF, lineshape, ...

  28. Y(4660) Z(4430)+ Y(4360) Z(4250)+ Y(4260) X(4160) X(3872) Y(3940) Z(4050)+ Y(4008) _ X(3940) DD 2(3820) JPC States with anomalous decay rates to lower quarkonia : Y(4008) Y(4260) Y(4360) Y(4660) Y(3940) J/ +- from ISR JPC = 1– – (2S) +- J/  typical  > 1MeV c.f. (’’  J/)  50keV recall (5S)  (nS) +- (2170)   +- [Yabsley] preliminary BaBar PRD74,091103R(2006)   O(1MeV) Large for convenrionalcharmonium state! (4040) 1– – supernumerary states (4160) hybrids ? hadrocharmonia ?

  29. arxiv:1204.2158 no Y(4008) Y(4260) (2S) tail or non-res J/+- BABAR PRELIMINARY 420 fb-1 States with anomalous (J/, ’, J/) [Santoro] e+e–  ISR J/ +– e+e–  ISR ’ +– Y(4360) Y(4660) Confirmations of Y(4660) & X(3915) (observed by Belle) No evidence for Y(4008) (reported by Belle)   J/  = Y(3940) X(3915)

  30. Y(4660) Z(4430)+ Y(4360) Z(4250)+ Y(4260) X(4160) X(3872) Y(3940) Z(4050)+ Y(4008) _ X(3940) DD 2(3820) JPC Charged charmonium like states – multiquark candidates Z(4050) Belle: Z(4430) (2S) + and  c1 + but no signal in J/ + Z(4250) produced in B  Z K decays BaBar: no significant signals

  31. _ Study of B  ’+K– at Belle & BaBar M ( ) M ( ) Belle and BaBar data look very similar Belle BaBar Conclusions are different: Belle Dalitz plot fitresult Z(4430)+ Belle: observation of Z(4430)– resonance in (’) channel BaBar: structure is due to contributions of (K) waves Different conclusions are due to different approaches : Belle: Dalitz analysis using isobar model (Breit-Wigner amplitudes, helicity formalizm) description of amplitudes is model-dependent BaBar: fit K helicity angle distribution in M(K) bins (no 2D fit) unphysical behaviour of amplitude is possible High statistics data from LHC can help to clarify

  32. New results on baryons

  33. Beauty baryons 1/2+ 0.4 3/2+ 3/2– 1/2–  3/2+ 0.2  1/2+ 1/2+  0.0 b b b b [Märki, Gorelov] * bb+– * bb+ | | c– + J/– | pK | - arxiv:1205.3452 PRL108,252002(2012) LHCb CMS NEW! CDF confirmed spin-excitation Ground states CDF, D0 First P-wave excitation and b spin-excitation Masses are in agreement w/ expectations P-wave excitation

  34. Exotics: two charged Zb bottomonium-like states in 5 decay modes: (1S)+, (2S)+, (3S)+, hb(1P)+, hb(2P)+ NEW: Zb BB*, Zb’  B*B*, neutral member of isotriplet + * Baryons: spin excitation b , P-wave b baryons, NEW: two N* Summary Many new results from hadronic machines and B- and c-factories Quarkonia: 2 , b(2S) , hb(1P) , hb(2P), b(3P) Ground states & low excitations – no surprises High excitations – progress in clarifying experimental situation, pattern : 1. States close to thresholds w/ molecular structure: X(3872), Zb(10610), Zb(10650) 2. States w/ anomalous partial  to lower quarkonia: 3. States w/ “wrong” masses: X(3940), X(4160) (2170), Y(4260), Y(4360), Y(4660), (5S), charged Z ? _ _ _ Similar phenomena in ss, cc and bb sectors. Some/many of these states cannot be conventional quarkonia. However, the exact interpretation is still unclear. Input from high-statistics measurements is important: LHC, Super B-factories.

  35. Back-up

  36. Search for X(4140) in LHCb Fit to LHCb data

  37. Observation of two new N* NEW! preliminary _ BESIII PWA of (2S)  pp 0 First PWA for baryon spectroscopy from BESIII data

  38. Look at Υ(5S)Υ(nS) p+p- Dalitz distributions for events in Y(nS) signal regions. 9.43 GeV <MM(π+π-) < 9.48 GeV 10.05 GeV <MM(π+π-) < 10.10 GeV 10.33 GeV <MM(π+π-) < 10.38 GeV Υ(1S)π+π- Υ(3S)π+π- Υ(2S)π+π- max M2(ϒπ±) M2(π+π-) M2(π+π-) M2(π+π-) To exclude contamination from gamma conversions we require: M2(π+π-) > 0.16 GeV2 M2(π+π-) > 0.20 GeV2 M2(π+π-) > 0.10 GeV2 Belle PRL 108, 122001

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