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Signatures of Dirac and Majorana sterile neutrinos in trilepton events at the LHC
Dib, CO; Kim, CS; Wang KC(王科臣); Wang, KC
2017
Source PublicationPHYSICAL REVIEW D
ISSN2470-0010
EISSN2470-0029
Volume95Issue:11Pages:115020
SubtypeArticle
AbstractHeavy sterile neutrinos with masses below MW can induce trilepton events at the 14 TeV LHC through purely leptonic W decays of W-+/--> e(+/-) e(+/-) mu(+/-)nu. and mu(+/-)mu(+/-)e(+/-)nu. where the heavy neutrino will be in an intermediate state on its mass shell. Discovery and exclusion limits for the heavy neutrinos are found using both cut-and-count (CC) and multivariate analysis (MVA) methods in this study. We also show that it is possible to discriminate between a Dirac and a Majorana heavy neutrino, even when lepton number conservation cannot be directly tested due to unobservability of the final state neutrino. This discrimination is done by exploiting a combined set of kinematic observables that differ between the Majorana and Dirac cases. We find that the MVA method can greatly enhance the discovery and discrimination limits in comparison with the CC method. For a 14-TeV pp collider with integrated luminosity of 3000 fb(-1), sterile neutrinos can be found with 5s significance if heavy-to-light neutrino mixings vertical bar U-Ne broken vertical bar(2)similar to vertical bar U-N mu vertical bar(2) similar to 10(-6), while the Majorana vs Dirac type can be distinguished if vertical bar U-Ne broken vertical bar(2)similar to vertical bar U-N mu vertical bar(2) similar to 10(-5) or even U-N mu vertical bar(2) similar to 10(-6) if one of the mixing elements is at least an order of magnitude smaller than the other.
DOI10.1103/PhysRevD.95.115020
WOS KeywordDOUBLE-BETA DECAY ; LEPTON NUMBER ; MASSES ; VIOLATION ; MU(+/-)MU(+/-) ; MIXINGS ; SEARCH ; MODELS
Indexed BySCI ; SCOPUS ; ADS ; INSPIREHEP
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000403493200007
ADS Bibcode2017PhRvD..95k5020D
ADS URLhttps://ui.adsabs.harvard.edu/abs/2017PhRvD..95k5020D
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2017PhRvD..95k5020D/citations
AXRIV CODE173
inspireid1516200
inspireURLhttps://inspirehep.net/record/1516200
Citation statistics
Cited Times:21 [INSPIRE]
Cited Times:25 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/284497
Collection理论物理室
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Dib, CO,Kim, CS,Wang KC,et al. Signatures of Dirac and Majorana sterile neutrinos in trilepton events at the LHC[J]. PHYSICAL REVIEW D,2017,95(11):115020.
APA Dib, CO,Kim, CS,王科臣,&Wang, KC.(2017).Signatures of Dirac and Majorana sterile neutrinos in trilepton events at the LHC.PHYSICAL REVIEW D,95(11),115020.
MLA Dib, CO,et al."Signatures of Dirac and Majorana sterile neutrinos in trilepton events at the LHC".PHYSICAL REVIEW D 95.11(2017):115020.
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