First Year of BABAR/PEP-II - Harvard University Laboratory for ...
First Year of BABAR/PEP-II - Harvard University Laboratory for ...
First Year of BABAR/PEP-II - Harvard University Laboratory for ...
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The Unitarity Triangle<br />
Unitarity condition V † V = VV † = 1 gives<br />
*<br />
V ud<br />
V ub<br />
* *<br />
+ V cd<br />
V cb<br />
+ V td<br />
V tb<br />
= 0<br />
The Unitarity Triangle:<br />
*<br />
V ud V<br />
----------------- ub<br />
*<br />
V cd V cb<br />
(ρ, η)<br />
α<br />
*<br />
V td V<br />
---------------- tb<br />
*<br />
V cd V cb<br />
γ<br />
β<br />
(1, 0)<br />
◆ All sides are O(1). Other triangles are squashed by λ 2 or λ 4 .<br />
The Unitarity triangle must close if the SM is correct.<br />
<strong>First</strong> <strong>Year</strong> <strong>of</strong> BaBar/<strong>PEP</strong>-<strong>II</strong> Masahiro Morii SLAC
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