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Heavy Flavor Physics in LHC era 조기현, 남수현, 김정현, 김영진, 배태길 High Energy Physics Team KISTI (Korea Institute of Science and Technology Information) October.

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Presentation on theme: "Heavy Flavor Physics in LHC era 조기현, 남수현, 김정현, 김영진, 배태길 High Energy Physics Team KISTI (Korea Institute of Science and Technology Information) October."— Presentation transcript:

1 Heavy Flavor Physics in LHC era 조기현, 남수현, 김정현, 김영진, 배태길 High Energy Physics Team KISTI (Korea Institute of Science and Technology Information) October 20-22, 2010 Korea Physical Society meeting Pyeongchang, Korea 1

2 Kihyeon Cho Why Heavy Flavor Physics? The first flavor of new phenomena often comes from flavor physics Weak decays of light hadrons => existence of charm quark CP violation => 3 rd quark family B0 oscillation => heavy top quark B mesons are especially suitable for beyond SM searches Large mass of b quark – stronger coupling to new particles Abundant production Well developed technique of experimental selection 2 G. Borissov

3 Kihyeon Cho Flavor physics in the LHC era LHC (High P T )  A unique effort toward the high-energy frontier to determine the energy scale of NP. Flavor physics  A Collective effort toward the high-intensity frontier to determine the flavor structure of NP 3

4 Kihyeon Cho 4 Not so near future!! (Grossman, Ligeti, Nir, May 2009)

5 5 LHC Era Phase 1: CERN vs FNAL scenarios but then ???? LHC , currently foreseen schedule: pp up to 7 TeV cm non stop with: L=0.2fb -1 (2010) + 0.8fb-1 (2011) LHC is starting up again since 2009 Tevatron Expecting to run until end 2011 => 12 fb -1, i.e. 10fb -1 data/experiment => x 2 present stat Presently L>3x10 32 cm -2 s -1, 2.5fb -1 /year Aurore

6 Kihyeon Cho Physics topics at KISTI Top forward-backward asymmetry Mixing and CPV Bs -> J/psi phi Bs -> psi(2S) phi Production mechanism of J/psi phi pipi Search for Bs -> phi(2S) phi pipi (Daejung) 6

7 Kihyeon Cho K. Tollefson FB Asymmetry at Tevatron

8 Kihyeon Cho 8 We used dimension-6 four quark operators with all the possible Dirac and color structures. We considered the s-, t- and u- channel exchanges of spin-0 and spin-1 particles whose color quantum number is either singlet, octet, triplet or sextet. Our results encode the necessary conditions for the underlying new physics in a compact and an effective way when those new particles are too heavy to be produced at the Tevatron. FB asymmetry at Tevatron Model independent analysis S.-h Nam. et.al, PLB 691, 238 (2010) The region in (C1,C2) plane that is consistent with the Tevatron data at the one sigma level.

9 Kihyeon Cho 9 Mixing  Currently working on Bs mixing  Dr. Soon-hyeon Nam’s talk

10 10 G. Borissov

11 11 Ongoing Analyzed 5.2 fb -1 Including new trigger (TTT) => adds 25% more data New analysis => cross-check Optimized data selection => getting more data than just from multiplying with the increase in luminosity. Untagged analysis in progress with TTT and comparing with Dimuons J/Ψ→ μμ from TTT sample Bs→J/Ψφ from TTT sample 6500 events from dimuon sample now => Dr. YoungJin Kim’s talk

12 Kihyeon Cho BelleContentBelle II 1998~2010Time Schedule2014~ 1 ab -1 Luminosity50 ab -1 1 BillionBBbar events50 Billion CP measurementGoalNew Physics Belle Belle II 12 Belle vs. Belle II To handle 50 times more data and grid farms => New Data Handling System

13 Kihyeon Cho 13 M. Nakao

14 Kihyeon Cho More penguin KISTI B → Φπ Pure EW penguin mode SM Br ~O(10 -8 ) Babar with 232M BB: UL(Φπ + ) < 2.4*10 UL(Φπ 0 ) < 2.8*10 Draft is almost ready. B + → ρ 0 K *+ Penguin dominant status Work on progress 14

15 Kihyeon Cho Belle II DH Working Group (Chair: K.Cho) KISTI Group HEP Team AMGA Team GSDC Team Melbourne Group Tom Fifield, Martin Sevior, … Krokow Group Maciej Sitarz, Mitosz Zdybat, Rafat Grzymkowski, Henryk Polka, … KEK, Karlsruhe, etc… => Dr. Junghyun Kim’s talk 15

16 Kihyeon Cho There are a few interesting results from the heavy flavor physics experiments indicating hints of something unknown… Top forward-backward asymmetry CP Violation and mixing Penguin decays NP or not-NP, we do not have clear understanding, yet. Therefore we continue working on heavy flavor physics in the LHC era. 16 Conclusions

17 Thank you. 17


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