Probe New Physics in Heavy Flavor: await for

SI 2014 @ Fuji Yoshida

Fanrong XuNational Taiwan University 2014. 8. 23

In Collaboration with Wei-Shu Hou and Masaya Kohda

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Outline• Introduction

(and, or)

• Our results in SM4

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The role of flavor physicsFlavor physics is one of the

important ways to probe NP : indirect detection.

Superstars in flavor in 2010s

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A.J. Buras, J. Girrbach, 1306.3775

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The evolution of

Straub [Moriond 2012] Straub [Nuovo Cim. C35 1 (2012) 249-256]

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The upcoming combination of

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CM

S P

RL

11

1 (

20

13

) 1

01

80

4LH

Cb

PR

L 11

1 (2

01

3) 1

01

80

5

Preliminary

“3σ”SI2014@Fuji Yoshida

s = 0.00 ± 0.07

PRD2013, 1 fb−1

0.01 ± 0.07 ± 0.01

PLB2012, 1 fb−1PRL2012, 0.37 fb−1

— Tagging —

The measurement of

Moral from φs

2013, 1 fb−1

2012, 1 fb−12012, 0.37 fb−1

2013, 1 fb−1

— Tagging —

0.070 ± 0.068 ± 0.0082014, 3 fb−1

?2014/5, 3 fb−1

CMS/ATLAS Provide Sanity Check

If Central Value stays Large Deviation+ from SM

Enhanced Bd → μ+μ− ? NP in b → d

Positive φs ? NP CPV in b → s

KOTO

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T. Nomura, ICHEP 2014

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A. Sergi [NA62], ICHEP 2014

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4G quark as an example of NP

Sequent 4G quark direct search

,

The discovery of Higgs boson in 2012 …

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SM4

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@ SM4Updated from Hou, Kohda, FX, Phys. Rev. D 87, 094005 (2013) [1302.1471]

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Scenario 1 & 3Scenario 2

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Scenario 1: enhanced & PDG purple (light): 1 (2) sigma allowed region

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Hou, Kohda, FX, to appear, 2014

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Current G-N bound

(𝑅¿¿6 , R8)=(1 ,0.7 ) , (1.5 ,0.7 ) , (2 ,0.7 ) ,(2.5,0 .7 )¿

gives a critical selection; In 1 sigma region, 10 times enhancement of from SM is easily achieved; In 2 sigma region, considering the effort from NA62 which would reduce the

Grossman-Nir bound, the prediction in SM4 is approaching GN bound; The discovery of in KOTO experiment is hopeful.

Scenario 1: enhanced & PDG

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The prediction for

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SC2: SM-like and LHCb

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SC3: enhanced and LHCb

In 2 sigma region together with large of , can touch GN bound

The solution space is narrow even in 2 sigma region, and is as low as SM-like, hard to be observed.

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Summary• With more rich data accumulated at LHC, and will be

precisely measured soon, which indicates the direction of NP.

• If NP appears in while is SM-like, could be large and approach G-N bound.

• If NP appears in while is SM-like, could touch G-N bound.

• If is observed enhanced, is slightly deviated from SM model in positive direction, will then be challenging to be observed in near future .

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