The b s as a piece of the new physics puzzle
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The B s as a Piece of the New Physics Puzzle. Hal Evans Columbia U. Assumption we will have already discovered beyond the SM Physics at the Tevatron/LHC Question to address at next generation exp’s How can B-physics contribute to our understanding of the nature of the new physics

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The b s as a piece of the new physics puzzle
The Bs as a Pieceof the New Physics Puzzle

Hal Evans Columbia U.

Assumption

  • we will have already discovered beyond the SM Physics at the Tevatron/LHC

    Question to address at next generation exp’s

  • How can B-physics contribute to our understanding of the nature of the new physics

    Specific questions to ask

  • What is the discriminating power of b-measurements to different beyond the SM flavors?

  • What are the projected sensitivities of upcoming exp’s?

  • What are their limiting experimental and theoretical errors?

Hal Evans


Acknowledgements
Acknowledgements

Tulika Bose

Leslie Groer

Silas Hoffman

Burair Kothari

Christos Leonidopoulos

Gabrielle Magro

Georg Steinbrueck

Mike Tuts

any mistakes are purely due to me !

Hal Evans


New physics in the b system
New Physics in the B System*

* Buras, hep-ph/0101336

Hal Evans


Models their consequences
Models & Their Consequences

Class A (Minimal Flavor Violation)Ali & London, hep-ph/0002167

  • C1Wtt = C1Wtt(SM) [1 + f]

    Class B (General MFV)Buras, et al, hep-ph/0107048

  • C1Wtt = C1Wtt(SM) [1 + fq] (q = d,s,)

  • fd fsf

  • Mq = Mq(SM) [1 + fq]

  • sin 2 ~ sin 2(SM) F [(1 + fd),(1 + fs),(1 + f)]

Hal Evans


More models
More Models…

Class C (Minimal Insertion Approx)Ali & Lunghi, hep-ph/0105200

  • all M(gluino,squark) ~ TeV except lightest stop

  • only 1 unsuppressed off-diagonal elem’s in squark mass matrix

    • cL – t2 ~excluded by bs

  • Ms: C1Wtt = C1Wtt(SM) [1 + f]

  • K, Md, sin2: C1Wtt = C1Wtt(SM) [1 + f + g] (g = gR + igI)

    Class D (LR Sym + Spont CPV) Ball, et al, hep-ph/9910211

  • very restrictive model

    • generally: sign[] opp. sign[a(Ks)] (same in SM)

    • , q related mainly to (2) param’s governing spont CPV

Hal Evans


Unitarity triangle predictions
Unitarity Triangle Predictions

  • Measurements & constraints included in fits to specific models

    • , |Vcb|, |Vub/Vcb|, Bq, fBi, mt,…

    • K, Md, b,…

  • Other B measurements also see effects:

    • bs, bd: rates and asymmetries

    • bsl+l-: asymmetries

    • BsJ/ asymmetry

Hal Evans


Unitarity triangle in mfv models
Unitarity Triangle in MFV Models

95% CL Allowed Contours from Fit

f = 0 SM

f = 0.2 mSUGRA

f = 0.45 non-mSUGRA

f = 0.75 non-SUGRA + nEDM

Ali and London: hep-ph/0002167

Hal Evans


Unitarity triangle in gmfv
Unitarity Triangle in GMFV

1 Allowed Contours from Fit

Ms = 18.0 ± 0.05 ps-1

a(Ks) = 0.5 ± 0.05

Buras, Chankowski, Rosiek, Slawianowska: hep-ph/0107048

Hal Evans


Unitarity triangle in mia
Unitarity Triangle in MIA

95% CL Allowed Contours from Fit

Ali and Lunghi: hep-ph/0105200

Hal Evans


Mass parameters in sb lr
Mass Parameters in SB LR

Allowed Region from all Constraints

M2 = mass of WR

MH = extra Higgs masses

Decoupling limit (M2,MH) excluded

Ball, Frere, Matias: hep-ph/9910211

Hal Evans


More constraints s s
More Constraints: s & s

  • CPV Phase in Bs

    • A(t)[Bs J/ ]  sin s

    • like sin 2 this is free of hadronic uncertainties to O(10%)

    • New Physics 

  • Bs Width Difference

    • s = L – H = 2 | 12| cos s

    • CP = 2(CP+ – CP-) = 2 | 12| = s / cos s

      • Note that s only decreases with New Physics

    • various methods to disentangle s & cos s

      • Dunietz, Fleischer, Nierste: hep-ph/0012219

    • s coupled to Ms in the SM

Hal Evans


S in new physics models
s in New Physics Models

Grossman: hep-ph/9603244

Hal Evans



B s experimental sensitivities

Main Exp Limitations

Statistics

Proper Time Resolution

Backgrounds

Main Theor Uncertainties

fBBB

mq

Bs Experimental Sensitivities

all sensitivities per year unless otherwise noted

Hal Evans


Gauging the impact of flavor physics
Gauging the Impact of Flavor Physics

Goal

  • Compare discriminating power of Flavor Physics for different new physics models

  • Quantifies where Flavor Physics makes an impact

    Strategy

  • Develop standard tests

  • Apply these to current situation and expected future

  • Predictions for benchmark SUSY points

  • Allowed regions for classes of models

    • Define outputs:

    • Define inputs: standard current parameter sets

    • Improvement path: collect expected sens’s vs time

      Problems

    • do we miss something by narrowing our goals?

  • Hal Evans


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