Naturally Small xs?
نویسنده
چکیده
Within the Standard Model, xs (the mixing parameter in theBs−B̄s system) is constrained to the range 7 ≤ xs ≤ 40. We point out that if New Physics contributes significantly to xd (the mixing parameter in the Bd − B̄d system), then 2 ≤ xs ≤ 7 is possible without any fine-tuned cancellations between the Standard Model and the New Physics contributions.
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تاریخ انتشار 2008