Search for heavy neutrinos or third-generation leptoquarks in final states with two hadronically decaying $$\tau$$ leptons and two jets in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV
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A search for new particles has been conducted using events with two high transverse momentum (p$$_{T}$$) τ leptons that decay hadronically, at least two high-p$$_{T}$$ jets, and missing transverse energy from the τ lepton decays. The analysis is performed using data from proton-proton collisions, collected by the CMS experiment in 2015 at $$ \sqrt{s}=13 $$ TeV, corresponding to an integrated luminosity of 2.1 fb$$^{−1}$$. The results are interpreted in two physics models. The first model involves heavy right-handed neutrinos, N$$_{ℓ}$$ (ℓ = e, μ, τ), and right-handed charged bosons, W$$_{R}$$, arising in a left-right symmetric extension of the standard model. Masses of the W$$_{R}$$ boson below 2.35 (1.63) TeV are excluded at 95% confidence level, assuming the N$$_{τ}$$ mass is 0.8 (0.2) times the mass of the W$$_{R}$$ boson and that only the N$$_{τ}$$ flavor contributes to the W$$_{R}$$ decay width. In the second model, pair production of third-generation scalar leptoquarks that decay into ττbb is considered. Third-generation scalar leptoquarks with masses below 740 GeV are excluded, assuming a 100% branching fraction for the leptoquark decay to a τ lepton and a bottom quark. This is the first search at hadron colliders for the third-generation Majorana neutrino, as well as the first search for third-generation leptoquarks in the final state with a pair of hadronically decaying τ leptons and jets.
- Research Organization:
- ABC Federal U.; Aachen, Tech. Hochsch.; Adiyaman U.; Ain Shams U., Cairo; Alabama U.; Andes U., Bogota; Antwerp U.; Argonne National Laboratory (ANL), Argonne, IL (United States); Athens U.; Auckland U.; Bari Polytechnic; Bari U.; Basilicata U., Potenza; Baylor U.; BeiHang U.; Beijing, Inst. High Energy Phys.; Belgrade U.; Bhabha Atomic Res. Ctr.; Bhubaneswar, Inst. Phys.; Bhubaneswar, NISER; Bogazici U.; Bologna U.; Boskovic Inst., Zagreb; Boston U.; Brandenburg Tech. U.; Bristol U.; British U. in Egypt; Brown U.; Brunel U.; Brussels U.; Budapest, RMKI; CC, Villeurbanne; CERN; CHEP, Taegu; CINVESTAV, IPN; Cag U., Mersin; Cairo, Acad. Sci. Res. Tech.; Caltech; Cantabria Inst. of Phys.; Canterbury U.; Carnegie Mellon U.; Catania U.; Catholic U. America; Charles U.; Chonbuk Natl. U.; Chonnam Natl. U.; Chulalongkorn U.; Colorado U.; Conacyt, Mexico; Cornell U.; Cukurova U.; Cyprus U.; DESY; Debrecen, Inst. Nucl. Res.; Delhi U.; Democritos Nucl. Res. Ctr.; Dubna, JINR; Ecole Polytechnique; Eotvos U.; Erzincan U.; Fairfield U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Florence U.; Florida Inst. Tech.; Florida Intl. U.; Florida State U.; Florida U.; Frascati; GTU, Tbilisi; Gaziosmanpasa U.; Genoa U.; Gent U.; Guglielmo Marconi U.; Hacettepe U.; Hamburg U.; Hanyang U.; Haute Alsace U.; Helsinki Inst. of Phys.; Helsinki U.; Helwan U.; IAC, La Laguna; IISER, Bhopal; IISER, Pune; IIUM, Kuala Lumpur; 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; IPM, Tehran; IRFU, Saclay; Iberoamericana U.; Ilia State U.; Illinois U., Chicago; Imperial Coll., London; Indian Inst. Tech., Madras; Inst. Scintill. Mat., Kharkiv; Ioannina U.; Iowa U.; Isfahan Tech. U.; Islamic Azad U., Sci. Res. Branch, Tehran; Istanbul Aydin U.; Istanbul Bilgi U.; Istanbul, Tech. U.; Izmir Inst. Tech.; Johns Hopkins U.; KIT, Karlsruhe, EKP; Kafkas U.; Kansas State U.; Kansas U.; Kharkov, KIPT; Korea U.; LIP, Lisbon; Lappeenranta U. Tech.; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lebedev Inst.; Louvain U.; Lyon, IPN; MIT; MOSTI, Malaysian Nucl. Agency, Kajang; Madrid, Autonoma U.; Madrid, CIEMAT; Malaya U.; Marmara U.; Maryland U.; Mersin U.; Middle East Tech. U., Ankara; Milan Bicocca U.; Mimar Sinan U.; Minnesota U.; Minsk, High Energy Phys. Ctr.; Minsk, Inst. Nucl. Problems; Mississippi U.; Moscow Phys. Eng. Inst.; Moscow State U.; Moscow, INR; Moscow, ITEP; Moscow, MIPT; NCBJ, Swierk; NICPB, Tallinn; Naples U.; Nebraska U.; Northeastern U.; Northwestern U.; Notre Dame U.; Novosibirsk State U.; Novosibirsk, IYF; Ohio State U.; Oviedo U.; Ozyegin U.; PSI, Villigen; Padua U.; Panjab U.; Pavia U.; Peking U.; Pelotas U.; Perugia U.; Piemonte Orientale U., Novara; Piri Reis U., Istanbul; 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.; Rice U.; Riga Tech. U.; Rio de Janeiro State U.; Rio de Janeiro, CBPF; Rochester U.; Rome U.; Ruhuna U.; Rutgers U., Piscataway; Rutherford; SUNY, Buffalo; Saha Inst.; San Francisco de Quito U.; San Luis Potosi U.; Sao Paulo, IFT; Seoul Natl. U.; Seoul U.; Serpukhov, IHEP; Siena U.; Sofiya U.; Sofiya, Inst. Nucl. Res.; Southampton U.; Split Tech. U.; Split U.; St. Petersburg Polytechnic Inst.; St. Petersburg, INP; Strasbourg, IPHC; Suez Canal U.; Sungkyunkwan U.; TIFR, Mumbai, DHEP; TU Vienna; Taiwan, Natl. Central U.; Taiwan, Natl. Taiwan U.; Tbilisi State U.; Tennessee U.; Texas A&M U. Qatar, Doha; Texas A-M; Texas Tech.; Trieste U.; Turin U.; U. Bern, AEC; U. Campinas; U. Debrecen, Inst. Phys.; U. Mons; U. Tehran, Coll. Engin.; UC, Davis; UC, Riverside; UC, San Diego; UC, Santa Barbara; UCLA; University Coll., Dublin; Utah Valley U.; 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; Yazd U.; Yerevan Phys. Inst.; Yildiz Tech. U.; Zurich U.; Zurich, ETH
- Sponsoring Organization:
- US Department of Energy
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1334969
- Alternate ID(s):
- OSTI ID: 22659149
- Report Number(s):
- CERN-EP-2016-286; CMS-EXO-16-016; FERMILAB-PUB-16-578-CMS; oai:inspirehep.net:1501683; arXiv:1612.01190
- Journal Information:
- JHEP, Journal Name: JHEP Vol. 03
- Country of Publication:
- United States
- Language:
- English
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