Long-lived heavy neutral leptons with a displaced shower signature at CMS

被引：11

作者：

Cottin, Giovanna ^{[1
,2
]}

Helo, Juan Carlos ^{[2
,3
]}

Hirsch, Martin ^{[4
]}

Pena, Cristian ^{[5
]}

Wang, Christina ^{[6
]}

Xie, Si ^{[5
,6
]}

机构：

[1] Univ Adolfo Ibanez, Fac Artes Liberales, Dept Ciencias, Diagonal Torres, 2640, Santiago, Chile

[2] Millennium Inst Subatom Phys High Energy Frontier, Fernandez Concha, 700, Santiago, Chile

[3] Univ Serena, Fac Ciencias, Dept Fis, Ave Cisternas,1200, La Serena, Chile

[4] Univ Valencia, AHEP Grp, Inst Fis Corpuscular, CSIC, 22085, E-46071 Valencia, Spain

[5] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[6] CALTECH, Pasadena, CA 91125 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 02期

关键词：

New Light Particles; Sterile or Heavy Neutrinos; SYMMETRY; MASSES;

D O I：

10.1007/JHEP02(2023)011

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study the LHC discovery potential in the search for heavy neutral leptons (HNL) with a new signature: a displaced shower in the CMS muon detector, giving rise to a large cluster of hits forming a displaced shower. A new Delphes module is used to model the CMS detector response for such displaced decays. We reinterpret a dedicated CMS search for neutral long-lived particles decaying in the CMS muon endcap detectors for the minimal HNL scenario. We demonstrate that this new strategy is particularly sensitive to active-sterile mixings with tau leptons, due to hadronic tau decays. HNL masses between similar to 1-6 GeV can be accessed for mixings as low as vertical bar V-tau N vertical bar(2) similar to 10(-7), probing unique regions of parameter space in the tau sector.

引用

页数：16

共 50 条

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