| Signatures of dirac and majorana sterile neutrinos in trilepton events at the lhc | |
| Dib, Claudio O.1,2; Kim, C. S.3,4; Wang, Kechen5,6 | |
| 刊名 | Physical review d
 |
| 2017-06-16 | |
| 卷号 | 95期号:11页码:10 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/physrevd.95.115020 |
| 通讯作者 | Wang, kechen(kechen.wang@desy.de) |
| 英文摘要 | Heavy 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. |
| WOS关键词 | DOUBLE-BETA DECAY ; LEPTON NUMBER ; MASSES ; VIOLATION ; MU(+/-)MU(+/-) ; MIXINGS ; SEARCH ; MODELS |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000403493200007 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2177318 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Wang, Kechen |
| 作者单位 | 1.Univ Tecn Federico Santa Maria, CCTVal, Valparaiso, Chile 2.Univ Tecn Federico Santa Maria, Dept Phys, Valparaiso, Chile 3.Yonsei Univ, Dept Phys, Seoul 120749, South Korea 4.Yonsei Univ, IPAP, Seoul 120749, South Korea 5.DESY, Notkestr 85, D-22607 Hamburg, Germany 6.Chinese Acad Sci, Inst High Energy Phys, Ctr Future High Energy Phys, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dib, Claudio O.,Kim, C. S.,Wang, Kechen. Signatures of dirac and majorana sterile neutrinos in trilepton events at the lhc[J]. Physical review d,2017,95(11):10. |
| APA | Dib, Claudio O.,Kim, C. S.,&Wang, Kechen.(2017).Signatures of dirac and majorana sterile neutrinos in trilepton events at the lhc.Physical review d,95(11),10. |
| MLA | Dib, Claudio O.,et al."Signatures of dirac and majorana sterile neutrinos in trilepton events at the lhc".Physical review d 95.11(2017):10. |
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