Naturally Small $x_s$?

Details Naturally Small $x_s$? Naturally Small $x_s$?

1994-02-24

arxiv.org/abs/hep-ph/9402348v1

Phys.Lett. B327 (1994) 85-89

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, WIS-94/9/Feb-PH

Scientific paper

10.1016/0370-2693(94)91533-4

Within the Standard Model, $x_s$ (the mixing parameter in the $B_s-\bar B_s$ system) is constrained to the range $7 \leq x_s\leq 40$. We point out that if New Physics contributes significantly to $x_d$ (the mixing parameter in the $B_d-\bar B_d$ system), then $2 \leq x_s\leq 7$ is possible without any fine-tuned cancellations between the Standard Model and the New Physics contributions.

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