The CKM matrix and flavor physics from lattice QCD

Details The CKM matrix and flavor physics from lattice QCD The CKM matrix and flavor physics from lattice QCD

2009-11-16

arxiv.org/abs/0911.3127v1

PoS LAT2009:014,2009

Physics

High Energy Physics

High Energy Physics - Lattice

22 pages, 17 figures. Plenary talk at 27th International Symposium on Lattice Field Theory (Lattice 2009), Beijing, China, 25-

Scientific paper

I discuss the role of lattice QCD in testing the Standard Model and searching for physics beyond the Standard Model in the quark flavor sector. I first review the Standard Model CKM framework. I then present the current status of the CKM matrix, focusing on determinations of CKM matrix elements and constraints on the CKM unitarity triangle that rely on lattice QCD calculations of weak matrix elements. I also show the potential impact of improved lattice QCD calculations on the global CKM unitarity triangle fit. I then describe several hints of new physics in the quark flavor sector that rely on lattice QCD calculations of weak matrix elements, such as evidence of a ~2-3 sigma tension in the CKM unitarity triangle and the "f_{D_s} puzzle". I finish with a discussion of lattice QCD calculations of rare B- and K-decays needed to probe physics beyond the Standard Model at future experiments.

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