南京师范大学物科院：Recent Progress in B Physics（PPT讲稿）

Recent Progress in B Physics 肖振军,南京师范大学物科院 第十届全国粒子物理学术会议,南京,2008

Recent Progress in B Physics 肖振军，南京师范大学物科院 第十届全国粒子物理学术会议，南京，2008

Outline 1. Major goals of b physics 2. Some results, puzzles 3. Factorizations, QCDF/SCET, pQCD 4. Some recent progress 5. Summary

1. Major goals of B physics 2. Some results , puzzles 3. Factorizations, QCDF/SCET, pQCD 4. Some recent progress 5. Summary Outline

1. Major goals of B physics

1. Major goals of B physics

1.B物理的主要物理目标 发现B介子系统的CP破坏: 标准模型味参数的精确测量 发现新物理存在的信号或证据 ★发现了B介子系统的直接CP破坏 ★sin(2β)的精确测量; ★测量了几十个衰变道的分支比; ★发现了 Exotic粒子:X,VZ ★ find some“ puzzles

---发现B介子系统的CP破坏： ---标准模型味参数的精确测量 ---发现新物理存在的信号或证据 ★ 发现了B介子系统的直接CP破坏 ★ sin(2β)的精确测量； ★ 测量了几十个衰变道的分支比； ★ 发现了Exotic粒子：X, Y, Z； ★ find some “puzzles” 1. B物理的主要物理目标

The Two b factories Integrated Luminosity(log) SLAC/LBL/LLNL SLAC-Based B Factory Mt Tsukuba PEP- ll and BABAR KEKB/ Belle PEPl‖ BaBar High Energy Ring Will stop soon BaBar

Belle Mt. Tsukuba BaBar PEP-II KEKB KEKB/ Belle PEP-II /BaBar The Two B Factories Will stop soon

LHC Physics Run Starts 2008 M4 M5 M3 SPD/PS HCAl Magnet ECAL T3 RICH2 T2 RICHI Vertex Locator ATLAS ALICE 是 0 15m

LHC Physics Run Starts 2008

ClEO Collaboration DO Collaboration CDF Collaboration

CLEO Collaboration, D0 Collaboration, CDF Collaboration

Belle collaboration IHEP, C Z Yuan, CC Zhang et al PKU Y Ban et al USTC, Z P. Zhang et al Other 3 groups from Taiwan BaBar,∴? LHCb Collaboration: 清华,YN.Gao,etal

Belle Collaboration: IHEP, C.Z.Yuan, C.C.Zhang et al., PKU, Y.Ban et al., USTC, Z.P. Zhang et al., Other 3 groups from Taiwan BaBar，… ? LHCb Collaboration: 清华, Y.N. Gao, et al

2. Some important results some puzzles

2. Some important results, some puzzles

Acp on B→Kπ △ AK Problem B→)K-丌 Belle Direct cpv BARAR weannBsnETObwnpenn established in B system(2004)! 0.200.2 AB(G 0.107+0018+0.0070093+0018±0008 World Average including CLEO: Acp(K+T )=-0.097+0.012 Acp(K+m0)=+0.050+0.025→A(K)=0.147±0.027@50 Need to explain the deviation, Hadronic effect or new physics? 6

Acp on B → Kp Belle  p →  B K Acp = -0.107±0.018 +0.007 -0.093±0.018±0.008 -0.004 • World Average including CLEO: Acp(K+p - ) = -0.097±0.012 • Acp(K+p 0 ) = +0.050±0.025  DA(Kp) = 0.147 ±0.027 @5s • Need to explain the deviation. Hadronic effect or new physics? 6 DAKp Problem Direct CPV established in B system (2004) !