Search for Long-Lived Heavy Neutral Leptons with Lepton Flavour Conserving or Violating Decays to a Jet and a Charged Lepton
[1];
[2];
[2];
[2];
[2];
[2];
[2];
[3];
[2];
[2];
[2];
[2];
[3];
[2];
[2];
[2];
[2];
[2]
more »
- Yerevan Phys. Inst.
- Vienna, OAW
- Vienna, OAW; TU Vienna
- Antwerp U.
- Vrije U., Brussels
- Vrije U., Brussels; Gent U.
- Brussels U.
- Gent U.
- Louvain U.
- Rio de Janeiro, CBPF
- Rio de Janeiro State U.
- Rio de Janeiro State U.; U. Campinas
- Rio de Janeiro State U.; Rio Grande do Sul U.
- Rio Grande do Sul U.
- ABC Federal U.
- Sofiya, Inst. Nucl. Res.
- Sofiya U.
- Tarapaca U.
- Beihang U.
- Tsinghua U., Beijing
- Tsinghua U., Beijing; Nanjing Normal U.; Iowa U.
- Beijing, Inst. High Energy Phys.; UCAS, Beijing
- Beijing, Inst. High Energy Phys.
- Peking U.
- SYSU, Guangzhou
- Hefei, CUST
- Nanjing Normal U.
- Fudan U.; Brussels U.
- Fudan U.
- Zhejiang U.
- Andes U., Bogota
- Antioquia U.
- Split Tech. U.
- Split U.
- Boskovic Inst., Zagreb
- Boskovic Inst., Zagreb; Unlisted
- Cyprus U.
- Charles U.
- Quito, Escuela Politecnica Natl.
- San Francisco de Quito U.
- Cairo, Acad. Sci. Res. Tech.; Cairo U.
- Cairo, Acad. Sci. Res. Tech.; Suez Canal U.; British U. in Egypt
- Fayoum U.
- NICPB, Tallinn
- Helsinki U.
- Helsinki Inst. of Phys.
- Lappeenranta U. Tech.
- IRFU, Saclay
- IRFU, Saclay; Purdue U.
- Ecole Polytechnique
- Strasbourg, IPHC; Haute Alsace U.
- Strasbourg, IPHC
- IP2I, Lyon
- IP2I, Lyon; Tsinghua U., Beijing
- GTU, Tbilisi; Ilia State U.
- GTU, Tbilisi
- GTU, Tbilisi; Unlisted
- Aachen, Tech. Hochsch.
- Aachen, Tech. Hochsch.; Erzincan U.
- DESY
- DESY; Hamburg U.
- DESY; Aachen, Tech. Hochsch.
- DESY; Isfahan Tech. U.
- DESY; Brandenburg Tech. U.
- DESY; IAS, Julich; Aachen, Tech. Hochsch.
- Hamburg U.
- KIT, Karlsruhe, EKP
- KIT, Karlsruhe, EKP; CERN
- KIT, Karlsruhe, IKP
- Democritos Nucl. Res. Ctr.
- Democritos Nucl. Res. Ctr.; CERN
- Athens U.
- Natl. Tech. U., Athens
- Ioannina U.
- Budapest, RMKI; U. Debrecen, Inst. Phys.
- Budapest, RMKI
- Budapest, RMKI; Debrecen, Inst. Nucl. Res.
- Eotvos U.
- Eotvos U.; Budapest, RMKI
- U. Debrecen, Inst. Phys.
- Debrecen, Inst. Nucl. Res.
- EKU KRC, Gyongyos; Budapest, RMKI
- EKU KRC, Gyongyos
- Panjab U.
- Delhi U.
- Saha Inst.
- Saha Inst.; Visva Bharati U.
- Indian Inst. Tech., Madras
- Indian Inst. Tech., Madras; Bangalore, Indian Inst. Sci.
- TIFR, Mumbai, DHEP
- Tata Inst.
- Bhubaneswar, NISER; Indian Inst. Tech., Bhubaneswar
- Bhubaneswar, NISER
- Bhubaneswar, NISER; Bhubaneswar, Inst. Phys.
- IISER, Pune
- Isfahan Tech. U.; DESY
- Isfahan Tech. U.
- Isfahan Tech. U.; Sharif U. of Tech.
- IPM, Tehran
- University Coll., Dublin
- INFN, Bari
- Bari U.; Helwan U.
- Bari U.
- INFN, Bari; Helwan U.
- INFN, Bologna
- INFN, Bologna; ENEA, Bologna
- INFN, Catania
- Messina U.; INFN, Catania
- INFN, Florence; U. Urbino (main)
- INFN, Florence
- Frascati
- Frascati; Guglielmo Marconi U.
- INFN, Genoa
- INFN, Milan Bicocca
- INFN, Naples
- Naples U.
- CERN
- INFN, Padua
- Fermilab
- Ain Shams U., Cairo
- INFN, Pavia
- INFN, Perugia
- INFN, Perugia; Perugia U.
- INFN, Pisa
- Pisa U.
- Pisa, Scuola Normale Superiore
- INFN, Rome; Rome U.
- INFN, Rome
- INFN, Turin
- Turin U.
- INFN, Trieste
- CHEP, Taegu
- Gangneung-Wonju Natl. U.
- Chonnam Natl. U.
- Hanyang U.
- Korea U.
- Kyung Hee U.
- Sejong U.
- Seoul Natl. U.
- Seoul U.
- Yonsei U.
- Sungkyunkwan U.
- AUM, Kuwait
- Riga Tech. U.
- Unlisted
- Vilnius U.
- Malaya U.
- Sonora U.
- CINVESTAV, IPN
- CINVESTAV, IPN; Conacyt, Mexico
- Iberoamericana U.
- Puebla U., Inst. Fis.
- Montenegro U.
- Canterbury U.
- Quaid-i-Azam U.
- AGH-UST, Cracow
- NCBJ, Swierk
- Warsaw U.
- Warsaw U. of Tech.
- LIP, Lisbon
- Belgrade U.
- VINCA Inst. Nucl. Sci., Belgrade
- Madrid, CIEMAT
- Madrid, Autonoma U.
- Oviedo U.
- Cantabria Inst. of Phys.
- Colombo U.
- Ruhuna U.
- CERN; Athens U.
- PSI, Villigen; Zurich U.
- PSI, Villigen
- Zurich, ETH
- Zurich U.; Stefan Meyer Inst. Subatomare Phys.
- Zurich U.
- Taiwan, Natl. Central U.; Annecy, LAPP
- Taiwan, Natl. Central U.
- Taiwan, Natl. Central U.; Bangalore, Indian Inst. Sci.
- Taiwan, Natl. Taiwan U.
- Chulalongkorn U.
- Cukurova U.
- Cukurova U.; Adiyaman U.
- Middle East Tech. U., Ankara
- Bogazici U.
- Bogazici U.; Marmara U.
- Bogazici U.; Kafkas U.
- Istanbul Tech. U.
- Istanbul Tech. U.; Hacettepe U.
- Istanbul U.
- Istanbul U.; Adiyaman U.
- Yildiz Tech. U.
- Yildiz Tech. U.; Adiyaman U.
- Inst. Scintill. Mat., Kharkiv
- Kharkov, KIPT
- Bristol U.
- Bristol U.; Vrije U., Brussels
- Rutherford
- Rutherford; Southampton U.
- Rutherford; Bristol U.
- Imperial Coll., London
- Imperial Coll., London; Monash U.
- Imperial Coll., London; CERN
- Brunel U.
- Baylor U.
- Catholic U. America
- Alabama U.
- Boston U.
- Brown U.
- Brown U.; Aachen, Tech. Hochsch.
- Brown U.; Bethel Coll.
- Brown U.; Karamanoglu Mehmetbey U., Karaman
- UC, Davis
- UCLA
- UC, Riverside
- UC, San Diego
- UC, Santa Barbara
- Caltech
- Carnegie Mellon U.
- Colorado U.
- Cornell U.
- Fermilab; Caltech
- Fermilab; Naval Academy, Annapolis
- Florida U.
- Florida State U.
- Florida Inst. Tech.
- Florida Inst. Tech.; Ain Shams U., Cairo
- Illinois U., Chicago
- Iowa U.
- Iowa U.; Bingöl U.
- Iowa U.; GTU, Tbilisi
- Iowa U.; Sinop U.
- Johns Hopkins U.
- Kansas U.
- Kansas U.; Bucharest, IFIN-HH
- Kansas State U.
- LLNL, Livermore
- Maryland U.
- MIT
- Minnesota U.
- Mississippi U.
- Nebraska U.
- SUNY, Buffalo
- Northeastern U.
- Northwestern U.
- Notre Dame U.
- Notre Dame U.; Unlisted
- Ohio State U.
- Princeton U.
- Puerto Rico U., Mayaguez
- Purdue U.
- Purdue U., Calumet
- Rice U.
- Rochester U.
- Rochester U.; Unlisted
- Rockefeller U.
- Rutgers U., Piscataway
- Rutgers U., Piscataway; Brandenburg Tech. U.
- Tennessee U.
- Texas A-M
- Texas A-M; Texas A&M U. Qatar, Doha
- Texas A-M; CHEP, Taegu
- Texas Tech.
- Vanderbilt U.
- Virginia U.
- Wayne State U.
- Wisconsin U., Madison
- Unlisted; Antwerp U.
- Unlisted; Caltech
- Unlisted; Yerevan Phys. Inst.
- Unlisted; Northeastern U.
- Unlisted; Imperial Coll., London; Yerevan Phys. Inst.
- Unlisted; Tashkent, IYF
A search for long-lived heavy neutral leptons (HNLs) is presented, which considers the hadronic final state and coupling scenarios involving all three lepton generations in the 2–20 GeV HNL mass range for the first time. Events comprising two leptons (electrons or muons) and jets are analyzed in a data sample of proton-proton collisions, recorded with the CMS experiment at the CERN LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138 fb$$^{−1}$$. A novel jet tagger, based on a deep neural network, has been developed to identify jets from an HNL decay using various features of the jet and its constituent particles. The network output can be used as a powerful discriminating tool to probe a broad range of HNL lifetimes and masses. Contributions from background processes are determined from data. No excess of events in data over the expected background is observed. Upper limits on the HNL production cross section are derived as functions of the HNL mass and the three coupling strengths V$$_{ℓN}$$ to each lepton generation ℓ and presented as exclusion limits in the coupling-mass plane, as lower limits on the HNL lifetime, and on the HNL mass. In this search, the most stringent limit on the coupling strength is obtained for pure muon coupling scenarios; values of |$$ {V}_{\mu \textrm{N}}^2 $$| > 5 (4) × 10$$^{−7}$$ are excluded for Dirac (Majorana) HNLs with a mass of 10 GeV at a confidence level of 95% that correspond to proper decay lengths of 17 (10) mm.[graphic not available: see fulltext]
- Research Organization:
- ABC Federal U.; AGH-UST, Cracow; AUM, Kuwait; Aachen, Tech. Hochsch.; Adiyaman U.; Ain Shams U., Cairo; Alabama U.; Andes U., Bogota; Annecy, LAPP; Antioquia U.; Antwerp U.; Athens U.; Bangalore, Indian Inst. Sci.; Bari U.; Baylor U.; Beihang U.; Beijing, Inst. High Energy Phys.; Belgrade U.; Bethel Coll.; Bhubaneswar, Inst. Phys.; Bhubaneswar, NISER; Bingöl U.; Bogazici U.; Boskovic Inst., Zagreb; Boston U.; Brandenburg Tech. U.; Bristol U.; British U. in Egypt; Brown U.; Brunel U.; Brussels U.; Bucharest, IFIN-HH; Budapest, RMKI; CERN; CHEP, Taegu; CINVESTAV, IPN; Cairo U.; Cairo, Acad. Sci. Res. Tech.; Caltech; Cantabria Inst. of Phys.; Canterbury U.; Carnegie Mellon U.; Catholic U. America; Charles U.; Chonnam Natl. U.; Chulalongkorn U.; Colombo U.; Colorado U.; Conacyt, Mexico; Cornell U.; Cukurova U.; Cyprus U.; DESY; Debrecen, Inst. Nucl. Res.; Delhi U.; Democritos Nucl. Res. Ctr.; EKU KRC, Gyongyos; ENEA, Bologna; Ecole Polytechnique; Eotvos U.; Erzincan U.; Fayoum U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Florida Inst. Tech.; Florida State U.; Florida U.; Frascati; Fudan U.; GTU, Tbilisi; Gangneung-Wonju Natl. U.; Gent U.; Guglielmo Marconi U.; Hacettepe U.; Hamburg U.; Hanyang U.; Haute Alsace U.; Hefei, CUST; Helsinki Inst. of Phys.; Helsinki U.; Helwan U.; IAS, Julich; IISER, Pune; INFN, Bari; INFN, Bologna; INFN, Catania; INFN, Florence; INFN, Genoa; INFN, Milan Bicocca; INFN, Naples; INFN, Padua; INFN, Pavia; INFN, Perugia; INFN, Pisa; INFN, Rome; INFN, Trieste; INFN, Turin; IP2I, Lyon; IPM, Tehran; IRFU, Saclay; Iberoamericana U.; Ilia State U.; Illinois U., Chicago; Imperial Coll., London; Indian Inst. Tech., Bhubaneswar; Indian Inst. Tech., Madras; Inst. Scintill. Mat., Kharkiv; Ioannina U.; Iowa U.; Isfahan Tech. U.; Istanbul Tech. U.; Istanbul U.; Johns Hopkins U.; KIT, Karlsruhe, EKP; KIT, Karlsruhe, IKP; Kafkas U.; Kansas State U.; Kansas U.; Karamanoglu Mehmetbey U., Karaman; Kharkov, KIPT; Korea U.; Kyung Hee U.; LIP, Lisbon; Lappeenranta U. Tech.; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Louvain U.; MIT; Madrid, Autonoma U.; Madrid, CIEMAT; Malaya U.; Marmara U.; Maryland U.; Messina U.; Middle East Tech. U., Ankara; Minnesota U.; Mississippi U.; Monash U.; Montenegro U.; NCBJ, Swierk; NICPB, Tallinn; Nanjing Normal U.; Naples U.; Natl. Tech. U., Athens; Naval Academy, Annapolis; Nebraska U.; Northeastern U.; Northwestern U.; Notre Dame U.; Ohio State U.; Oviedo U.; PSI, Villigen; Panjab U.; Peking U.; Perugia U.; Pisa U.; Pisa, Scuola Normale Superiore; Princeton U.; Puebla U., Inst. Fis.; Puerto Rico U., Mayaguez; Purdue U.; Purdue U., Calumet; Quaid-i-Azam U.; Quito, Escuela Politecnica Natl.; Rice U.; Riga Tech. U.; Rio Grande do Sul U.; Rio de Janeiro State U.; Rio de Janeiro, CBPF; Rochester U.; Rockefeller U.; Rome U.; Ruhuna U.; Rutgers U., Piscataway; Rutherford; SUNY, Buffalo; SYSU, Guangzhou; Saha Inst.; San Francisco de Quito U.; Sejong U.; Seoul Natl. U.; Seoul U.; Sharif U. of Tech.; Sinop U.; Sofiya U.; Sofiya, Inst. Nucl. Res.; Sonora U.; Southampton U.; Split Tech. U.; Split U.; Stefan Meyer Inst. Subatomare Phys.; Strasbourg, IPHC; Suez Canal U.; Sungkyunkwan U.; TIFR, Mumbai, DHEP; TU Vienna; Taiwan, Natl. Central U.; Taiwan, Natl. Taiwan U.; Tarapaca U.; Tashkent, IYF; Tata Inst.; Tennessee U.; Texas A&M U. Qatar, Doha; Texas A-M; Texas Tech.; Tsinghua U., Beijing; Turin U.; U. Campinas; U. Debrecen, Inst. Phys.; U. Urbino (main); UC, Davis; UC, Riverside; UC, San Diego; UC, Santa Barbara; UCAS, Beijing; UCLA; University Coll., Dublin; Unlisted; VINCA Inst. Nucl. Sci., Belgrade; Vanderbilt U.; Vienna, OAW; Vilnius U.; Virginia U.; Visva Bharati U.; Vrije U., Brussels; Warsaw U.; Warsaw U. of Tech.; Wayne State U.; Wisconsin U., Madison; Yerevan Phys. Inst.; Yildiz Tech. U.; Yonsei U.; Zhejiang U.; Zurich U.; Zurich, ETH
- Sponsoring Organization:
- US Department of Energy
- Grant/Contract Number:
- 89243024CSC000002; AC02-07CH11359
- OSTI ID:
- 2287666
- Report Number(s):
- CERN-EP-2023-256; CMS-EXO-21-013; FERMILAB-PUB-23-0860-CMS; oai:inspirehep.net:2735808; arXiv:2312.07484
- Journal Information:
- JHEP, Journal Name: JHEP Vol. 03
- Country of Publication:
- United States
- Language:
- English
Similar Records
Search for heavy neutral leptons in final states with electrons, muons, and hadronically decaying tau leptons in proton-proton collisions at $ \sqrt{s} $ = 13 TeV
Search for long-lived heavy neutral leptons decaying in the CMS muon detectors in proton-proton collisions at
Search for long-lived heavy neutral leptons in proton-proton collision events with a lepton-jet pair associated with a secondary vertex at $\sqrt{s}$ = 13 TeV
Journal Article
·
2024
· JHEP
·
OSTI ID:2396705
+2405 more
Search for long-lived heavy neutral leptons decaying in the CMS muon detectors in proton-proton collisions at
Journal Article
·
2024
· Phys.Rev.D
·
OSTI ID:2468678
+2353 more
Search for long-lived heavy neutral leptons in proton-proton collision events with a lepton-jet pair associated with a secondary vertex at $\sqrt{s}$ = 13 TeV
Journal Article
·
2025
· Journal of High Energy Physics (Online)
·
OSTI ID:3007081
+2378 more