科研之友
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摘要
We study the constraints on supersymmetric contributions to b -> s transitions from the recent allowed range and measurement of B-s-(K) over bar (s) mixing obtained by the D0 and Collider Detector at Fermilab collaborations at the Tevatron. We compute the upper bounds on the relevant off-diagonal squark mass terms and compare them with the bounds coming from Delta F=1 decays. We find that the constraints on chirality-flipping mass insertions are unaffected. Conversely, the measurement of B-s-(B) over bar (s) mixing is effective in constraining chirality-conserving mass insertions, and it has striking effects in the case in which left- and right-handed insertions have similar size. Finally, we discuss the phase of the B-s-(B) over bar (s) mixing amplitude in the presence of supersymmetric contributions.
- 出版日期2006-7-14
