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- Title
Quark mixing, CKM unitarity: The unitarity problem.
- Authors
Abele, H.; Barberio, E.; Dubbers, D.; Glück, F.; Hardy, J. C.; Marciano, W. J.; Serebrov, A.; Severijns, N.
- Abstract
In the Standard Model of elementary particles, quark-mixing is expressed in terms of a 3 x 3 unitary matrix V , the so called Cabibbo-Kobayashi-Maskawa (CKM) matrix. Significant unitarity checks are so far possible for the first row of this matrix. This article reviews the experimental and theoretical information on these matrix elements. On the experimental side, we find a 2.2 σ to 2.7 s deviation from unitarity, which conflicts with the Standard Model.
- Subjects
QUARKS; PARTICLES (Nuclear physics); LEPTONS (Nuclear physics); BETA decay; NUCLEAR physics; NUCLEAR reactions
- Publication
European Physical Journal C -- Particles & Fields, 2004, Vol 33, Issue 1, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s2003-01574-8