Bounds on Invisible Higgs Boson Decays Extracted from LHC <(tt)over bar>H Production Data

被引：19
|
作者：
Zhou, Ning [1 ]
Khechadoorian, Zepyoor [1 ]
Whiteson, Daniel [1 ]
Tait, Tim M. P. [1 ]
机构：
[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
来源：
PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 15期
基金：
美国国家科学基金会;
关键词：
DARK-MATTER; SEARCHES; LIGHT;
D O I：
10.1103/PhysRevLett.113.151801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present an upper bound on the branching fraction of the Higgs boson to invisible particles by recasting a CMS Collaboration search for stop quarks decaying to (tt) over bar + E-T(miss) T. The observed (expected) bound, BF(H -> inv.) < 0.40(0.65) at 95% C. L., is the strongest direct limit to date, benefiting from a downward fluctuation in the CMS data in that channel. In addition, we combine this new constraint with existing published constraints to give an observed (expected) bound of BF(H -> inv.) < 0.40(0.40) at 95% C. L., and we show some of the implications for theories of dark matter which communicate through the Higgs portal.
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页数：4
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