Introduction

11
Cheng-Ju Lin Fermilab Wine&Cheese Introduction he Standard Model, the FCNC decay of B + - is heav ressed 9 10 ) 9 . 0 5 . 3 ( ) ( − − + × ± = → s B BR diction is below the sensitivity of current experim 0): SM Expect to see 0 events at the Tevatron Any signal would indicate new physics!! (Buchalla & Buras, Misiak & Urban) is further suppressed by CKM couping (v td /v ts ) 2 SM prediction

TAGS:

description

Introduction. In the Standard Model, the FCNC decay of B  m + m - is heavily suppressed. SM prediction . (Buchalla & Buras, Misiak & Urban). Bd  mm is further suppressed by CKM couping (v td /v ts ) 2. SM prediction is below the sensitivity of current experiments - PowerPoint PPT Presentation

Transcript of Introduction

Page 1: Introduction

Cheng-Ju Lin Fermilab Wine&Cheese

Introduction

• In the Standard Model, the FCNC decay of B +- is heavily suppressed

910)9.05.3()( −−+ ×±=→ sBBR

• SM prediction is below the sensitivity of current experiments (CDF+D0): SM Expect to see 0 events at the Tevatron

Any signal would indicate new physics!!

(Buchalla & Buras, Misiak & Urban)

• Bd is further suppressed by CKM couping (vtd/vts)2

SM prediction

Page 2: Introduction

Cheng-Ju Lin Fermilab Wine&Cheese

BEYOND STANDARD MODEL

• In many SUSY models, the BR could be enhanced by many orders of magnitude:

For example: - MSSM: Br(B) is proportional to tan6 - Br(B ) also enhanced at high tan in GUT SO(10) models

BR could be as large as 10-1000 times the SM prediction

Would be observable at the Tevatron

Page 3: Introduction

Cheng-Ju Lin Fermilab Wine&Cheese

BEYOND STANDARD MODEL

’i23 i22

b

s

R-parity violating SUSY• Another example: R-Parity violating SUSY

- Tree level diagram is allowed in R-parity violating (RPV) SUSY models. - Possible to observe decay even for low value of tan

- Enhancement depends stronglyon coupling constants (’

Would also be observable at the Tevatron

Page 4: Introduction

PROBE OF NEW PHYSICS• New physics may enhance Bs and Bd differently

• Minimal-flavor-violation (MFV) assumption in SUSY yields SM relations between Bs and Bd decays

• Can observe both Bs and Bd: unique to Tevatron

• CDF has the mass resolution to distinguish two decays, sM~23MeV : unique to CDF

• Either observation or null search, results will provide important clues about possible scenarios of new physics beyond SM

Monte Carlo

M(Bs)-M(Bd)~90MeV

Page 5: Introduction

Bs: we observed 0 events which yields a combined limit of: 1.6×10-7 @ 90% CL 2.1×10-7 @ 95% CL

Bd: we observed 0 events which yields a combined limit of: 3.9×10-8 @ 90% CL 5.1×10-8 @ 95% CL

Br(Bs) < 4.1×10-7 @ 90% CL ; D0 PRL 94 (2005) 042001 Br(Bs) < 5.8×10-7 @ 90% CL ; CDF PRL 93 (2003) 032001 Br(Bd) < 3.0×10-7 @ 90% CL ; D0 Preliminary 4733 Br(Bd) < 8.0×10-8 @ 90% CL ; (BaBar PRL 94 (2005) 221803

Both CDF Bs and Bd results are x2 better than the best published result!!!

Limits Summary

Page 6: Introduction

RPV SUSY EXCLUSIONB. Dutta, U. Regina

’i23 i22

b

s

R-parity violating SUSY

• Possible to exclude phase space even for small tan()

• Exclusion strongly depends on the coupling.

Excluded

Page 7: Introduction

mSUGRA M0 vs M1/2

• We are beginning to carve into mSUGRA space

• For mh~115GeV implies 10-8<Br(Bs)<3×10-7

Solid red = excluded by theory or experimentDashed red line = light Higgs mass (mh)Dashed green line = (a)susy (in units of 10-10)Black line = Br(Bs)

Dedes, Dreiner, Nierste, PRL 87(2001) 251804

M0

[GeV

]

Excluded

Excluded

Page 8: Introduction

mSUGRA M0 vs M1/2

• We are beginning to carve into mSUGRA space

• For mh~115GeV implies 10-8<Br(Bs)<3×10-7

Solid red = excluded by theory or experimentDashed red line = light Higgs mass (mh)Dashed green line = (a)susy (in units of 10-10)Black line = Br(Bs)

Dedes, Dreiner, Nierste, PRL 87(2001) 251804

M0

[GeV

]

Excluded

Excluded

Excluded by thisnew result

Page 9: Introduction

R. Dermisek et al., hep-ph/0304101

SO(10) Unification Model

• tan()~50 constrained by unification of Yukawa coupling

• White region is not excluded

• Unification valid for small M1/2

(~500GeV)

Red regions are excluded by either theory or experimentsGreen region is the WMAP preferred regionBlue dashed line is the Br(Bs) contourLight blue region excluded by old Bs analysis

h2>0.13

m+

<104

GeV

mh<

111G

eV

Page 10: Introduction

R. Dermisek et al., hep-ph/0304101

SO(10) Unification Model

• tan()~50 constrained by unification of Yukawa coupling

• All previously allowed regions (white) are excluded by this new measurement

• Unification valid for small M1/2

(~500GeV)

• New Br(Bs limit strongly disfavors this solution for mA= 500 GeV

Red regions are excluded by either theory or experimentsGreen region is the WMAP preferred regionBlue dashed line is the Br(Bs) contourLight blue region excluded by old Bs analysis

h2>0.13

m+

<104

GeV

mh<

111G

eV

Excluded by thisnew result

Page 11: Introduction

Cheng-Ju Lin Fermilab Wine&Cheese

Bs Limit Projection

• Extrapolate based on the current analysis which was optimized for 1/fb

• Assume background scales linearly with luminosity

• Will need to re-optimize the analysis for > 3/fb


Introduction to introduction to introduction to … Optimization

Introduction to introduction to introduction to … Optimization

1. INTRODUCTION • INTRODUCTION • EINFÜHRUNG • INLEIDING • INTRODUCCIÓN … · 2016-12-16 · 1. INTRODUCTION • INTRODUCTION • EINFÜHRUNG • INLEIDING • INTRODUCCIÓN

1. INTRODUCTION • INTRODUCTION • EINFÜHRUNG • INLEIDING • INTRODUCCIÓN … · 2016-12-16 · 1. INTRODUCTION • INTRODUCTION • EINFÜHRUNG • INLEIDING • INTRODUCCIÓN

PRODUCT INTRODUCTION Company Introduction

PRODUCT INTRODUCTION Company Introduction

Introduction Introduction (ctnd.)

Introduction Introduction (ctnd.)

R as a Web Service Introduction Introduction Introduction

R as a Web Service Introduction Introduction Introduction

Introduction Chapitre 1 · Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction Chapitre 1 · Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

An Introduction to NSAn Introduction to NS2An Introduction ...

An Introduction to NSAn Introduction to NS2An Introduction ...

 · Introduction . 6 . Contents . Introduction ...

 · Introduction . 6 . Contents . Introduction ...

§1.1.1 INTRODUCTION: 1. INTRODUCTION

§1.1.1 INTRODUCTION: 1. INTRODUCTION

Systems Analysis I introduction I introduction. 2Systems Analysis - Introduction Contents Introduction Introduction 3 classic phases 3 classic phases.

Systems Analysis I introduction I introduction. 2Systems Analysis - Introduction Contents Introduction Introduction 3 classic phases 3 classic phases.

Introduction & Strategy Module Introduction & Administrative

Introduction & Strategy Module Introduction & Administrative

voip-iptel-introduction-SRK1.ppt voip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-ip

voip-iptel-introduction-SRK1.ppt voip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-iptel-introduction-SRK1.pptvoip-ip

Introduction - daks2k3a4ib2z.cloudfront.net€¦ · Introduction Establishedin1974MarbleHillFireplacesofferoneofthelargestandmostcomprehensiveselectionsof …

Introduction - daks2k3a4ib2z.cloudfront.net€¦ · Introduction Establishedin1974MarbleHillFireplacesofferoneofthelargestandmostcomprehensiveselectionsof …

Introduction Section I: Introduction

Introduction Section I: Introduction

Introduction Introduction Introduction Introduction.

Introduction Introduction Introduction Introduction.

Introduction 1. Introduction

Introduction 1. Introduction

Introduction and Welcome€¦ · Introduction and Welcome Introduction 4

Introduction and Welcome€¦ · Introduction and Welcome Introduction 4

1. INTRODUCTION 1.1 Introduction

1. INTRODUCTION 1.1 Introduction

Introduction to Elasticsearch and Logstash. - KIT · PDF fileOutline 1 Introduction 2 Logstash Introduction 3 Elasticsearch Introduction 4 Conclusions Introduction Logstash ElasticsearchConclusions

Introduction to Elasticsearch and Logstash. - KIT · PDF fileOutline 1 Introduction 2 Logstash Introduction 3 Elasticsearch Introduction 4 Conclusions Introduction Logstash ElasticsearchConclusions

The Sacrament of Baptism Introduction Video Introduction Video The Sacrament of Baptism Introduction Video Introduction Video.

The Sacrament of Baptism Introduction Video Introduction Video The Sacrament of Baptism Introduction Video Introduction Video.