Measuring the CKM angle

77 Pages·2017·15.82 MB·English

Measuring the CKM angle γ
Matthew Kenzie
University of Cambridge
Neckarzimmern B Physics Workshop
March 22, 2017
1.Football 2/77
γ as a preamble to this evenings entertainment...?
MatthewKenzie(Cambridge) NeckarzimmernBPhysicsWorkshop MeasuringtheCKMangleγ
1.Introduction 3/77
1. Introduction
1 Introduction
2 CP violation and the CKM matrix
3 The LHCb Experiment
4 CKM angle γ
5 Combination of Measurements
6 Conclusion and Prospects
MatthewKenzie(Cambridge) NeckarzimmernBPhysicsWorkshop MeasuringtheCKMangleγ
1.Introduction 4/77
Summary of 2016
March2016-Startedwithsuchpromise
MatthewKenzie(Cambridge) NeckarzimmernBPhysicsWorkshop MeasuringtheCKMangleγ
1.Introduction 5/77
Summary of 2016
March2016-Startedwithsuchpromise
June2016-Brexit
Mylevelsofdespair
MatthewKenzie(Cambridge) NeckarzimmernBPhysicsWorkshop MeasuringtheCKMangleγ
1.Introduction 6/77
Summary of 2016
March2016-Startedwithsuchpromise
June2016-Brexit November2016-Trump
Mylevelsofdespair
MatthewKenzie(Cambridge) NeckarzimmernBPhysicsWorkshop MeasuringtheCKMangleγ
1.Introduction 7/77
Summary of 2016
March2016-Startedwithsuchpromise
June2016-Brexit November2016-Trump
Endof2016-StillnoNewPhysics(NP)
MatthewKenzie(Cambridge) NeckarzimmernBPhysicsWorkshop MeasuringtheCKMangleγ
1.Introduction 8/77
Don’t despair!
(cid:73) Direct NP discovery by ATLAS/CMS is still possible
(cid:73) Flavour sector provides another window of opportunity
(cid:73) Today I will discuss looking for new sources of CPV by constraining CKM angle γ
(cid:73) MainlyfocusedtowardsLHCb’ssearches
(cid:73) AlsoincludeinformationfromBelleandBaBarforHFAG/CKM/PDGworldaverage
(cid:73) WithsomefutureprospectsfromBelleIIandLHCb
MatthewKenzie(Cambridge) NeckarzimmernBPhysicsWorkshop MeasuringtheCKMangleγ
1.Introduction 9/77
How does a matter dominated universe arise?
Sakharov:
1. Baryon Number Violation
2. Cand CPviolation
3. Interactions out of thermal equilibrium
(cid:73) We live in a matter (and photon) dominated universe
(cid:73) CP violation is a crucial ingredient to this problem
(cid:73) CPV in the SM (∼10 20) does not nearly account for the observed baryon-photon
−
ratio (∼10 10)
−
MatthewKenzie(Cambridge) NeckarzimmernBPhysicsWorkshop MeasuringtheCKMangleγ
2.CPviolationandtheCKMmatrix 10/77
2. CP violation and the CKM matrix
1 Introduction
2 CP violation and the CKM matrix
3 The LHCb Experiment
4 CKM angle γ
5 Combination of Measurements
6 Conclusion and Prospects
MatthewKenzie(Cambridge) NeckarzimmernBPhysicsWorkshop MeasuringtheCKMangleγ