Semivisible Jets: Dark Matter Undercover at the LHC

被引：88

作者：

Cohen, Timothy ^{[1
,2
,3
]}

Lisanti, Mariangela ^{[1
]}

Lou, Hou Keong ^{[1
]}

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[2] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA

[3] Univ Oregon, Inst Theoret Sci, Eugene, OR 97403 USA

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 17期

基金：

美国国家科学基金会;

关键词：

HIGGS;

D O I：

10.1103/PhysRevLett.115.171804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Dark matter may be a composite particle that is accessible via a weakly coupled portal. If these hidden-sector states are produced at the Large Hadron Collider (LHC), they would undergo a QCD-like shower. This would result in a spray of stable invisible dark matter along with unstable states that decay back to the standard model. Such "semivisible" jets arise, for example, when their production and decay are driven by a leptophobic Z' resonance; the resulting signature is characterized by significant missing energy aligned along the direction of one of the jets. These events are vetoed by the current suite of searches employed by the LHC, resulting in low acceptance. This Letter will demonstrate that the transverse mass-computed using the final-state jets and the missing energy-provides a powerful discriminator between the signal and the QCD background. Assuming that the Z' couples to the standard model quarks with the same strength as the Z', the proposed search can discover (exclude) Z' masses up to 2.5 TeV (3.5 TeV) with 100 fb(-1) of 14 TeV data at the LHC.

引用

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