B  VV and B  Baryons — a personal view December 12, 2006, CKM2006 @ Nagoya

Part I: Comments on VV modes Disclaimer Part I: Comments on VV modes Data vs Models VT vs VV puzzle No New Physics: Angular Study Part II: the Emerging Baryonic modes History: Discovery of p+p-K+ 3-body > 2-body Threshold Peaking ! Further Puzzle: Angular Correlations K+ and c+c-K+ Two Body: Charmed vs Charmless Future: Triple Products

Disclaimer ... you could talk about recent experimental/theoretical topics on the charmless Baryonic decays. The session also contains B-> Ks Ks and other hadronic b-> d by Babar B-> VV (under discussion) by Belle and Babar. If you could include another topics related to these subjects, that would be welcome, too. To me, baryonic final states are the farthest away from CKM, as they are more subject to hadronic effects, with dynamics not quite understood yet. Further, although I am one of the people who initiated the direction (even experimentally), I have not quite actively worked on it in past 2 years. If people like Hai-Yang Cheng, Chun-Khiang Chua, or Chao-Qiang Geng, or Mahiko Suzuki are attending CKM, they may be more suitable for this talk.

Polarization in Charmless VV Puzzle Part I: Comments on VV modes Polarization in Charmless VV Puzzle Naïve Factorization : Longitudinal fL = 1 – O(mV2/mb2) BaBar 89M, PRL 91, 171802 (2003): Fit fL only, find ~ 0.5 ! Belle 86M, PRL 91, 201801 (2003): angular fit in transversity basis

Data

Models yours truly

Heuristic/Drastic Model On-shell b  s g: g is Transverse b  s g ~ 3 x 10−4 b  s g ~ few x 10−3 10% 0.1% ? B  K* g ~ 4 x 10−5 B  KT* fT ~ 5 x 10−6 b x g min. is “gg” Simple String Fragmentation  Resonances Complicated Color Structure August 17, ICHEP2004 George W.S. Hou (NTU)

Models Problem with K*0r Similar concept a suppressed

Models SCET (hep-ph/0607001) : Annihilation (XA) factorizable, small, and real Against, including QCDF Problem with K*0r Similar concept a suppressed

SCET, after all the work, throw up hand and adopt “Charming Penguin” ... Does not give correct DCPV Smaller B  K* F.F. ? e.g. A0 ~ 0.3 rather than 0.4 (hep-ph/0411305) Models At least within standard framework Against, including QCDF Hadronic Problem with K*0r Similar concept LD Rescattering (inelastic FSI): selects only a small subset of possible inelastic processes; unknown “scale” for effective coupling a suppressed

Data Smaller B  K* F.F. ? Pure P Check K*K* modes

VT vs VV puzzle hep-ex/0610073

No New Physics: Angular Study Complete fit following London+Sinha2 fL f‖ f⊥ Hadronic Evidence for FSI phase CP conserv. Triple Products No indication for NP

Part II: the Emerging Baryonic modes Baryons from Meson Decay — Only B !

Minzu Wang finished some R&D for ... History: Discovery of p+p-K+ Spring 2001 Minzu Wang finished some R&D for ... My advice: As late starter, work on some project that is not (yet) frontline. (convenor) Suggest: Rare Baryonic, both 2- and 3-body “I can’t predict when/where they will emerge, but they will, and I expect 3-body > 2-body.” Reported Fall 2001 ! How could I be so sure? “We point out new ways to search for charmless baryonic B decays and suggest that enhanced baryon production is favored by reduced energy release on the baryon side.” WSH & Soni, PRL’01 (hep-ph/0008079)

(we were congratulated by Russian colleagues Anecdote: Kpp  Khh Powerful new Dalitz plot to scoop up 3-body and quasi-2-body modes. Ironically, a CLEO leftover: h = p+, K+, but not p+ But nobody thought of it ... (we were congratulated by Russian colleagues

B+ → p+p-K+ and charmless baryonic PRL 88, 181803 (2002) A new class of B decays dominated (so far) by Belle K+p+p- Threshold peaking generic [predicted by Chua, WSH, Tsai, PLB’02 for B  rp-n from factorization  baryon form factor Half a dozen modes observed — 2-body still not observed Search for pentaquark Θ+(+), Glueball — Not seen, limits set hep-ph/0108068 pLg

ARGUS’87 vs. CLEO’88 Exp false alarm Grand History 1987: ARGUS ... 1988 CLEO refute Exp false alarm ARGUS 1988 PLB209(1988)119 ppp(p) ~ 5x10-4 !! CLEO 1988 PRL62(1989)8 ppp(p) < 1.4 (2.9)x10-4

2-body Charmless Baryonic Modes Very Rare (≪ 10-5 of Mesonic) Grand History 1987: ARGUS ... 1988 CLEO refute 1997: first exclusive measurement of BcpX (X= , ) by CLEO One thing struck me: Phys. Rev.D59:111101,1999 2-body Charmless Baryonic Modes Very Rare (≪ 10-5 of Mesonic)

Grand History 1987: ARGUS ... 1988 CLEO refute 1997: first exclusive measurement of BcpX (X= , ) by CLEO 2000: first observation of B  D*p-n by CLEO

Probably Only Person to Notice This Slide at ICHEP2000 Dave Cinabro at ICHEP2000 [CLEO Spokesperson] I knew worker, Tony Rubiera, who had graduated and left; So, communicated further with advisor (J. Yelton) at Florida. Phys.Rev.Lett. 86 (2001) 2732

“enhanced baryon production is favored by reduced energy release” Grand History 1987: ARGUS ... 1988 CLEO refute 1997: first exclusive measurement of BcpX (X= , ) by CLEO 2000: first observation of B  D*p-n by CLEO WSH & Soni: “Pathways to Rare Baryonic B Decays” “enhanced baryon production is favored by reduced energy release”

Grand History 1987: ARGUS ... 1988 CLEO refute 1997: first exclusive measurement of BcpX (X= , ) by CLEO 2000: first observation of B  D*p-n by CLEO WSH & Soni: “Pathways to Rare Baryonic B Decays” 2001: first observation of charmless B+ ppK+ by Belle Chua, WSH & Tsai: “Prediction” for Threshold Enhancement hep-ph/0107110

II. Possible Dynamics of Underlying 3-body CLEO’01: Factorized Currents/Current Produced /Isospin Relation Belle’02: and Extend Idea … Seems to Work Threshold Peaking Factorization in 3-body ? & r, p Chua, WSH, Tsai, PRD’02 hep-ph/0107110 Vector Current gives 60% & Threshold Enhancement hep-ph/0204185, to appear PRD in preparation hep-ph/0209164 25 July 2002, ICHEP George W.S. Hou

Grand History 1987: ARGUS ... 1988 CLEO refute 1997: first exclusive measurement of BcpX (X= , ) by CLEO 2000: first observation of B  D*p-n by CLEO WSH & Soni: “Pathways to Rare Baryonic B Decays” 2001: first observation of charmless B+ ppK+ by Belle Chua, WSH & Tsai: “Prediction” for Threshold Enhancement 2002: observation of cpX (X=,) by Belle, CLEO, D(*)0pp by Belle 2003: first observation of 2-body decay: B0 cp (Belle) first evidence of B+ J/p (BaBar) 2004: first observation of B+ p by Belle 2005: Doubly charmed baryon modes B cc, ccK by Belle

reduced energy release ... Threshold Peaking Low Mass bsg MC pΛgSignal threshold peaking String breaking g s b Understood b s Not Low Mass Peaking for hadronic less understood reduced energy release ...

Hai-Yang Cheng, talk at Capri, 5/06 Rosner; Suzuki

B+ΛΛK+ 140 fb-1 cf. ffK First observation of bs s s baryonic decay g b s s cf. ffK 140 fb-1 threshold peaking +6.5 - 5.1 +0.90 - 0.70 First observation of bs s s baryonic decay Signal Yield in 2D fit: 19.9 Efficiency: 4.0%-6.9% Statistical Significance: 7.4σ BF:(2.91 ± 0.38) x 10-6 First Charmless B decay with two Λ! Threshold enhancement again. Compliment to BφK(*) (bsss penguin) PRL 93,211801, 2004

hc  ff, LL: Study CPV in 3-body with hc width Observation of ηc Λ Λ hep-ex/0606022 Ratio for baryon quark-diquark model check hc  ff, LL: Study CPV in 3-body with hc width ffK: Hazumi hep-ph/0303089

B+c+c-K+ BF(B+c+c-K+ ) = (6.5 ± 1.1 ± 3.4) × 10-4 hep-ex/0508015, to appear in PRL Unexpected large rate considering the limited phase sapce Threshold effect? c+ pK-π+ signal BF(B+c+c-K+ ) = (6.5 ± 1.1 ± 3.4) × 10-4 +1.0 -0.9

Observation of B cc B+ c0c+ B0 c-c+ hep-ex/0510074, to appear PRD(RC) B+ c0c+ B0 c-c+ CKM(cc)=VcbVcs* <-> CKM(cp)=VcbVud* Enhancement for smaller Q ? c π 1% cc  10-3 >> cp  10-5

A new class of charmless B decays dominated (so far) by Belle PRL 88, 181803 (2002) K+p+p- Threshold peaking generic Angular correlation of K- & p a puzzle Half a dozen modes observed pLg 2-body still not observed pp < 10 -7

Part I: Comments on VV modes Disclaimer Part I: Comments on VV modes Data vs Models VT vs VV puzzle No New Physics: Angular Study Part II: the Emerging Baryonic modes History: Discovery of p+p-K+ 3-body > 2-body Threshold Peaking ! Further Puzzle: Angular Correlations K+ and c+c-K+ Two Body: Charmed vs Charmless Future: Triple Products