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Search for Bottom Counterparts of X(3872) and Y(4260) via p + p - 

Search for Bottom Counterparts of X(3872) and Y(4260) via p + p - . July 28, 2006, ICHEP ’ 06 @ Moscow. Outline. I Introduction II X b  p + p -  at Tevatron/LHC III Y b  p + p -  in e + e -  ( g ISR ) Y b IV Discussion and Conclusion. based on hep-ph/0606016

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Search for Bottom Counterparts of X(3872) and Y(4260) via p + p - 

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  1. Search for Bottom Counterparts of X(3872) and Y(4260) via p+p- July 28, 2006, ICHEP’06 @ Moscow

  2. Outline I Introduction II Xbp+p- at Tevatron/LHC III Ybp+p- in e+e- (gISR)Yb IV Discussion and Conclusion based on hep-ph/0606016 (published in PRD) A simple talk to motivate the experts

  3. I. Introduction Bottomonium? [X(3940), Z(3940)] Xb, Ybp+p-  p+p-J/y  p+p-J/y  wJ/y

  4. Narrow 1++ preferred DD* threshold

  5. ISR The Y(4260) 1-- 2005 2006 G ~ 90 MeV Gee Bp+p-J/y ~ 5.5 eV Direct Scan vs 0.5 eV y(3770) LargeG(Y p+p-y) !

  6. II. Xbp+p- at Tevatron/LHC Mass: If BB* ➯ 10640 MeV If coupled BB* and s/d-wave ➯ ~10560 MeV Production: - No B  KX analogue - Fortunately prompt X(3872) dominant (~ y(2S)) Will check if rdominant when seen 4.4K/77pb-1 vs300K/40pb-1 J/y ~ 3000 X(3872) evts / fb-1 [ p+p-J/y(mm)] PRL’02 PRD’05 Xbp+p-(mm) analogue: ~ 180 evts / 8fb-1 Too Optimistic?

  7. To Do (seems on-going at CDF) - benchmark: (2S) p+p- - Look for high mass, narrow states   bb ??? Promising at Tevatron Run II More conservative: Take ratio of peaks ~ 1/800 ➯ ~ 30 evts / 8fb-1 J/y(mm) N.B. BR, production frac., etc. CDF, PRD’05 (mm) CDF, PRL’02

  8. Remarks - Much work to do to estimate cross sections - Forward cross sections even less known Should be larger ! - LHCb has forward design(w/ RICH/ECAL) ➯Spectroscopy May be best @ LHCb “Y(3940)” Any narrow state, e.g. wJ/y (K+K-J/y ?) Assured at LHC (if exist) Xbp+p-(mm) Domenech-Garret, Sanchis-Lozano, NPB’01 Huge cross section over 102 increase ➯ Expect > 103 evts / fb-1 PYTHIA fitting CDF J/y To Do for ATLAS, CMS, LHCb - benchmark: (2S) p+p- - Look for high mass, narrow states CDF, PRL’02   bb ???

  9. II. Ybp+p-in e+e- (gISR)Yb e+e- gISRp+p-J/y e+e- p+p-J/y BaBar, PRL’05 CLEO-c, PRL’06 233 fb-1 13 pb-1 ~ 125 evts ~ 35 evts stimulate s(e+e-+p-J/) ~ 50 pb Analogy: Do bothe+e- gISRp+p- and e+e- p+p-

  10. Belle (5S) Runs Bs motivated June 21-23, 2005 1.86 fb-1 @ 10869 MeV Energy scan: 10825 10845 10865 10885 10905 each 30 pb-1 Repeated June, 2006 21.7 fb-1 ! ~ 1 fb-1/day Do Bothe+e- p+p- and e+e- gISR p+p- ~ 24 fb-1 on (5S)at hand Direct ScanQuick and Easy Yb Mass ? Cross Section ?

  11. Guestimates ─ Mass: Use QQg hybrid (CLEO favored) lattice work to illustrate - 10600 - 10900 MeV(Michael) Could scale down, ∵ccg prediction typically higher than Y(4260) ➯ Could show up in ISR on (5S) - 10900 – 11000 MeV (Juge, Kuti, Morningstar) Predicted ccg state ~ 4260 ➯ Prefers Higher Energy Scan Width: 100 MeV (~ Yc = Y(4260)) plausible Product BR: Assume ~ Could be smaller or larger ─ 10865 ─ BaBar/CLEO

  12. Yb p+p- Evt Guestimates Cross Section: ISR on (5S) g energy fraction in CM Direct 10900 11000 ─ ─ ~1/s scaling Even for ~ 1 eV, Comparable to BaBar CLEO-c for Y(4260) ~ 125 ISR evts @ 10700 MeV, for 25 fb-1 on (5S) ~ 45 Direct Scan evts / 30 pb-1 Promising ! More effective ?

  13. IV. Discussion and Conclusion • Only Tevatron confirmed X(3872) — Need Highest Energy • - Only narrow states at hadronic colliders: Go for Xb • - Too much combinatorics (p+p-) for heavy ion collisions • 1++not easy at e+e-, so/but LHCb should • - Be prepared for other Narrow States • - Aim for diverse modes (e.g. K+K-  or w) and JPC determination • Available (5S) at Belle should be exploited for ISR Yb • Probably hard for BaBar to collect equivalent data • Both Belle and BaBar should try • Quick energy scan 10600 – 11000 MeV Profitable ! (?) • If Yb found, can run a little longer around direct e+e-  Yb • Study different channels (K+K-? p0p0?) and properties (be ingenious)

  14. Conclusion 233 fb-1 125 evts BaBar (gISR +) ppat B Factories ? ppat Tevatron/LHC ? Xb, YbMaybe Discovered in Near Future !

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