New Physics in B decays 3 rd International Conference on Flavor Physics Oct.3-8, 2005 National...

New Physics in B decaysNew Physics in B decays

33rdrd International Conference on Flavor International Conference on Flavor PhysicsPhysics

Oct.3-8, 2005 Oct.3-8, 2005

National Central University, Taiwan National Central University, Taiwan

Tadashi Yoshikawa Tadashi Yoshikawa (Nagoya U. )(Nagoya U. )

This talk is based on

C.S.Kim, Y.J.Kwon,Jake Lee and T. Y. hep-ph/0509015 .

This talk is based on

C.S.Kim, Y.J.Kwon,Jake Lee and T. Y. hep-ph/0509015 .

Before LP05Before LP05 There were quite large discrepancies There were quite large discrepancies

in CP asymmetries. in CP asymmetries.

After LP05After LP05

AfterAfter LP05 LP05 The discrepancies were substantially The discrepancies were substantially

reduced !!reduced !! Almost consistent with the SM !!Almost consistent with the SM !!

Our task is Our task is to find the evidence of to find the evidence of

New PhysicsNew Physics if they are cleverly if they are cleverly

hiding behind the SM. hiding behind the SM.

WhereWhere is the origin ? is the origin ? Using the topological diagrammatic decomposition:

P : QCD Penguin, S: QCD Singlet Penguin

C : color suppressed tree, PEW : EW penguin

Ps, Ss, PEWs : bsss 　 penguin processes

P : QCD Penguin, S: QCD Singlet Penguin

C : color suppressed tree, PEW : EW penguin

Ps, Ss, PEWs : bsss 　 penguin processes

B B decaysdecays

ＴＴｒｒｅｅｅｅ

QCDQCD ＰＰｅｎｅｎｇｕｉｎｇｕｉｎ

CColor olor suppressed suppressed

treetree

EElectrolectroWWeakeak

PPenguin (enguin (PPEWEW))

AAnnihilatinnihilationon SSinglet QCD inglet QCD

PenguinPenguin

CColor suppressed olor suppressed

EWEW PPenguinenguin

((PPCCEWEW ))

Gronau, Hernandez, London, Rosner

b

Comparison by CP Comparison by CP asymmetryasymmetry

Time-dependent CP asymmetry: Time-dependent CP asymmetry:

Af direct CP violation

Sf mixing CP violation : M (phase of B-B mixing) 　～１

Ｄ (phase of A(Bf) )

Almost 0!!

New Physics window is still New Physics window is still

remainingremaining ! !

How to get ?How to get ?1.1. SS ＪＪ // 　　 VS bVS b ｓ　ｓ　 penguin processes penguin processes 2.2. Among bAmong b ｓ　ｓ　 penguins: Spenguins: SKK, S, S’ K’ K, S, SKK

3.3. Between Bd decays and Bs decays Between Bd decays and Bs decays 4.4. bb ｓ ｓ penguin VS bpenguin VS b ｄ　ｄ　 penguin processepenguin processe

s. s.

You can distinguish where the origin comes You can distinguish where the origin comes from!!from!!

For exampleFor example

Case B :

SSS KKK ' SSS KKK '

B-1 ) The difference comes from the weak phase for C .

Time-dependent CP asymmetry are

To reduce both Sf s from sin2is Slightly difficult because of the different of the sigh!!

B-2 ) case B-1 + new weak phase .

Lower bound of S

under A’K = 0.08 0.07, AK = 0.02 0.13 , SK = 0.31 0.26

Lower bound of S

under A’K = 0.08 0.07, AK = 0.02 0.13 , SK = 0.31 0.26

r > 0.1, r > 0.1,

EXP. bound

Need large r (~ C / P) !! Other hand , In SM, r ~ O(0.01) Other hand , In SM, r ~ O(0.01)

In Case D: In Case D: 　　 SSKK 　～　 　～　 SS’ K’ K 　 ～　　 ～　

SSKKHow to distinguish ?

Consider using Bs decays !!Consider using Bs decays !!We can get information because no phase in Bs mixing .

BBdd decays + B decays + Bss decays decays b

S, d

S, d

s

Pure penguin process

Pure EW penguin process

( if C is negligible )

We will extract each information about New phase including We will extract each information about New phase including each diagram. each diagram. We will extract each information about New phase including We will extract each information about New phase including each diagram. each diagram.

ConclusionConclusion Time-dependent CP asymmetries may include Time-dependent CP asymmetries may include

some fruitful information about New Physics. some fruitful information about New Physics. Comparing among SComparing among S f f s, one may find the type of s, one may find the type of

New Physics. New Physics. Several Bs decays may help resolve to distinguish Several Bs decays may help resolve to distinguish

the origin of New Physics! the origin of New Physics!

Bs ’, Bs ’, BsK0K0 will give us some very important information where the new CP phases come from. Bs ’, Bs ’, BsK0K0 will give us some very important information where the new CP phases come from.