1. Heavy Flavor Physics in the LHC era 조기현, 남수현, 김정현, 김영진, 배태길 고에너지물리연구팀 KISTI (Korea Institute of Science and Technology Information) April 13-15, 2011 The Korean Physical Society Meeting Daejeon, Korea 1

2. Kihyeon Cho Abstract Since LHC turns on and Belle II is approved, there have been rich for hot topics on heavy flavor physics experiments. In this paper, we will compare theories and experiments (Belle/Belle II, CDF and LHCb) on heavy flavor physics. We also show the activities at KISTI. In addition, we consider the meaning of heavy flavor physics during LHC era. 2

3. Kihyeon Cho Heavy Flavor Experiments (2011.04) 3 Belle/Belle II (KISTI 참여 ) CDF (KISTI 참여 ) LHCb ( 참고 ) Year1998-2010 (Belle) 2014 – (Belle II) 2001-2009- PlaceKEK, JapanFermilab, USACERN, Europe Collaboratio n 13/47/~300(Belle II) (Nat./Ins./member) 15/63/62015/54/730 σ1 nb (10GeV) 150 μb (2TeV) 300~500 μb (7~14TeV) Current Luminosity 1 ab -1 9 fb -1 10 pb -1

4. Kihyeon Cho 4 B physics selections Ref. LHCb-CONF-2001-001 (2011.3.24)

5. Kihyeon Cho 5 Not so near future!! Grossman, Ligeti, Nir (May 2009)

6. Kihyeon Cho Heavy Flavor Physics at KISTI 6 ExperimentTheory Rare B0 decaysBelle ( 김정현 등 ) Left-Right models ( 남수현 등 ) Mixing and CPV on Bs->J/psi phi CDF ( 김영진, 조기현, 배태길 등 ) Left-Right models ( 남수현 등 ) Top Forward-backward Asymmetry CDFModel independent Analysis ( 남수현 등 ) CP violating dimuon charge asymmetry due to B mixing D0 Left-Right models ( 남 수현 등 ) e- Science Theory Comput -ing Experi- ment

7. Kihyeon Cho Rare B modes @ Belle B → Φπ Pure EW penguin mode SM Br ~O(10 -8 ) Babar with 232M BB: UL(Φπ + ) < 2.4*10 -7 @90%CL2.4*10 -7 @90%CL UL(Φπ 0 ) < 2.8*10 -7 @90%CL2.8*10 -7 @90%CL Draft is almost ready. B + → ρ 0 K *+ Penguin dominant status Work on progress 7 Junghyun Kim, K. Cho, Nakao, …

8. Kihyeon Cho 8 Mixing @ Left-Right models  Currently work in progress Dr. Soo-hyeon Nam

9. Kihyeon Cho 9 CP violation on Bs-> J/psi @CDF Analyzed 5.2 fb -1 Including new trigger (TTT) => adds 25% more data New analysis => cross-check Optimized data selection => 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 presentation

10. Kihyeon Cho 10 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 @ 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.

11. 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. 11

12. Kihyeon Cho There are a few interesting results from the heavy flavor physics experiments indicating hints of something unknown… Penguin decays CP Violation and mixing Top forward-backward asymmetry NP or not-NP, we do not have clear understanding, yet. Therefore we, HEP team at KISTI, continue working on heavy flavor physics for both theory and experiment in the LHC era. 12 Summary

13. Thank you. cho@kisti.re.kr 13