Probe New Physics in Heavy Flavor: await for SI 2014 @ Fuji Yoshida Fanrong Xu National Taiwan University 2014. 8. 23 In Collaboration with Wei-Shu Hou and Masaya Kohda
Jan 22, 2016
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
Fanrong Xu 2
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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