arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1006.3469hep-ex
收藏

寻找稀有衰变B_s^0-> mu ^+ mu ^-

Search for the rare decay B_s^0->mu^+mu^-

D0 Collaboration, V. Abazov et al

摘要:

我们利用费米实验室Tevatron对撞机的D0实验收集到的6.1 fb ^-1的ppbar碰撞数据(sqrt(s)= 1.96 TeV),对变味中性电流衰变B_s^0-> mu ^+ mu ^-进行了研究。观察到的B_s^0候选者的数量与背景预期一致。在95% C. L时,支化分数的上限为BR(B_s^0-> mu ^+ mu ^-)<5.1 x 10 ^-8。该限度比先前D0分析的限度好2.4倍,是迄今为止的最佳限度。

英文摘要:

We present the results of a search for the flavor changing neutral current decay B_s^0->mu^+mu^- using 6.1 fb^-1 of ppbar collisions at sqrt(s) = 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron Collider. The observed number of B_s^0 candidates is consistent with background expectations. The resulting upper limit on the branching fraction is BR(B_s^0->mu^+mu^-) < 5.1 x 10^-8 at the 95% C.L. This limit is a factor of 2.4 better than that of the previous D0 analysis and the best limit to date.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑