Long-lived heavy neutral leptons at the LHC: four-fermion single-NR operators

被引：17

作者：

Beltran, Rebeca ^{[1
]}

Cottin, Giovanna ^{[2
,3
]}

Helo, Juan Carlos ^{[3
,4
]}

Hirsch, Martin ^{[1
]}

Titov, Arsenii ^{[5
,6
]}

Wang, Zeren Simon ^{[7
,8
]}

机构：

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

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

[3] Millennium Inst Subat Phys High Energy Frontier S, Fernandez Concha 700, Santiago, Chile

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

[5] Univ Valencia, Dept Fis Tear, Dr Moliner 50, E-46100 Burjassot, Spain

[6] Univ Valencia, CSIC, Inst Fis Corpuscular, Dr Moliner 50, E-46100 Burjassot, Spain

[7] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan

[8] Natl Tsing Hua Univ, Ctr Theory & Computat, Hsinchu 300, Taiwan

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2022年 / 2022卷 / 01期

关键词：

Beyond Standard Model; Effective Field Theories; Neutrino Physics; LEFT-RIGHT SYMMETRY; NONCONSERVATION; SEARCHES; MASSES; MODEL;

D O I：

10.1007/JHEP01(2022)044

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：

Interest in searches for heavy neutral leptons (HNLs) at the LHC has increased considerably in the past few years. In the minimal scenario, HNLs are produced and decay via their mixing with active neutrinos in the Standard Model (SM) spectrum. However, many SM extensions with HNLs have been discussed in the literature, which sometimes change expectations for LHC sensitivities drastically. In the N-R SMEFT, one extends the SM effective field theory with operators including SM singlet fermions, which allows to study HNL phenomenology in a "model independent" way. In this paper, we study the sensitivity of ATLAS to HNLs in the N-R SMEFT for four-fermion operators with a single HNL. These operators might dominate both production and decay of HNLs, and we find that new physics scales in excess of 20 TeV could be probed at the high-luminosity LHC.

引用

页数：18

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