Hunting for New Physics with Unitarity Boomerangs

Details Hunting for New Physics with Unitarity Boomerangs Hunting for New Physics with Unitarity Boomerangs

2010-04-21

arxiv.org/abs/1004.3679v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex 9 pages with two figures. References updated.

Scientific paper

Although the unitarity triangles ($UTs$) carry information about the Kobayashi-Maskawa (KM) quark mixing matrix, it explicitly contains just three parameters which is one short to completely fix the KM matrix. It has been shown recently, by us, that the unitarity boomerangs ($UB$) formed using two $UTs$, with a common inner angle, can completely determine the KM matrix and, therefore, better represents, quark mixing. Here, we study detailed properties of the $UBs$, of which there are a total 18 possible. Among them, there is only one which does not involve very small angles and is the ideal one for practical uses. Although the $UBs$ have different areas, there is an invariant quantity, for all $UBs$, which is equal to a quarter of the Jarlskog parameter $J$ squared. Hunting new physics, with a unitarity boomerang, can reveal more information, than just using a unitarity triangle.

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