Search for type-III seesaw heavy leptons in pp collisions at root s=8 TeV with the ATLAS detector

Aad, G.; Agatonović-Jovin, Tatjana; Bogavac, D.; Bozic, I.; Dimitrievska, A.; Krstić, Jelena; Mamužić, Judita; Marjanović, M.; Popović, D. S.; Sijacki, Dj.; Simić, Lj.; Vranješ, Nenad; Vranješ Milosavljević, Marija; Živković, Lada

doi:10.1103/PhysRevD.92.032001

2015

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Abstract

A search for the pair production of heavy leptons (N-0, L-+/-) predicted by the type-III seesaw theory formulated to explain the origin of small neutrino masses is presented. The decay channels N-0 - GT W(+/-)l(+/-) (l = e, mu, tau) and L-+/- - GT W(+/-)v (v = v(e), v(mu), v(tau)) are considered. The analysis is performed using the final state that contains two leptons (electrons or muons), two jets from a hadronically decaying W boson and large missing transverse momentum. The data used in the measurement correspond to an integrated luminosity of 20.3 fb(-1) of pp collisions at root s = 8 TeV collected by the ATLAS detector at the LHC. No evidence of heavy lepton pair production is observed. Heavy leptons with masses below 325-540 GeV are excluded at the 95% confidence level, depending on the theoretical scenario considered.

Source:
Physical Review D, 2015, 92, 3

Funding / projects:

ANPCyT, Argentina, YerPhI, Armenia, ARC, Australia, BMWFW, Austria, FWF, Austria, ANAS, Azerbaijan, SSTC, Belarus, CNPq, Brazil, FAPESP, Brazil, NSERC, Canada, NRC, Canada, CFI, Canada, CERN, CONICYT, Chile, CAS, China, MOST, China, NSFC, China, COLCIENCIAS, Colombia, MSMT CR, Czech Republic, MPO CR, Czech Republic, VSC CR, Czech Republic, DNRF, Denmark, DNSRC, Denmark, Lundbeck Foundation, Denmark, EPLANET, European Union, ERC, European Union, NSRF, European Union, IN2P3-CNRS, France, CEA-DSM/IRFU, France, GNSF, Georgia, BMBF, Germany, DFG, Germany, HGF, Germany, MPG, Germany, AvH Foundation, Germany, GSRT, Greece, NSRF, Greece, RGC, Hong Kong SAR, China, ISF, Israel, MINERVA, Israel, GIF, Israel, I-CORE, Israel, Benoziyo Center, Israel, INFN, Italy, MEXT, Japan, JSPS, Japan, CNRST, Morocco, FOM, Netherlands, NWO, Netherlands, BRF, Norway, RCN, Norway, MNiSW, Poland, NCN, Poland, GRICES, Portugal, FCT, Portugal, MNE/IFA, Romania, MES of Russia, Russian Federation, NRC KI, Russian Federation, JINR, MSTD, Serbia, MSSR, Slovakia, ARRS, Slovenia, MIZS, Slovenia, DST/NRF, South Africa, MINECO, Spain, SRC, Sweden, Wallenberg Foundation, Sweden, SER, Switzerland, SNSF, Switzerland, Cantons of Bern and Geneva, Switzerland, NSC, Taiwan, TAEK, Turkey, STFC, United Kingdom, Royal Society, United Kingdom, Leverhulme Trust, United Kingdom, DOE, United States of America, NSF, United States of America, ICREA

DOI: 10.1103/PhysRevD.92.032001

ISSN: 1550-7998; 1550-2368

WoS: 000358935400001

Scopus: 2-s2.0-84940545151

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TY  - JOUR
AU  - Aad, G.
AU  - Agatonović-Jovin, Tatjana
AU  - Bogavac, D.
AU  - Bozic, I.
AU  - Dimitrievska, A.
AU  - Krstić, Jelena
AU  - Mamužić, Judita
AU  - Marjanović, M.
AU  - Popović, D. S.
AU  - Sijacki, Dj.
AU  - Simić, Lj.
AU  - Vranješ, Nenad
AU  - Vranješ Milosavljević, Marija
AU  - Živković, Lada
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/684
AB  - A search for the pair production of heavy leptons (N-0, L-+/-) predicted by the type-III seesaw theory formulated to explain the origin of small neutrino masses is presented. The decay channels N-0 - GT W(+/-)l(+/-) (l = e, mu, tau) and L-+/- - GT W(+/-)v (v = v(e), v(mu), v(tau)) are considered. The analysis is performed using the final state that contains two leptons (electrons or muons), two jets from a hadronically decaying W boson and large missing transverse momentum. The data used in the measurement correspond to an integrated luminosity of 20.3 fb(-1) of pp collisions at root s = 8 TeV collected by the ATLAS detector at the LHC. No evidence of heavy lepton pair production is observed. Heavy leptons with masses below 325-540 GeV are excluded at the 95% confidence level, depending on the theoretical scenario considered.
T2  - Physical Review D
T1  - Search for type-III seesaw heavy leptons in pp collisions at root s=8 TeV with the ATLAS detector
VL  - 92
IS  - 3
DO  - 10.1103/PhysRevD.92.032001
ER  -

@article{
author = "Aad, G. and Agatonović-Jovin, Tatjana and Bogavac, D. and Bozic, I. and Dimitrievska, A. and Krstić, Jelena and Mamužić, Judita and Marjanović, M. and Popović, D. S. and Sijacki, Dj. and Simić, Lj. and Vranješ, Nenad and Vranješ Milosavljević, Marija and Živković, Lada",
year = "2015",
abstract = "A search for the pair production of heavy leptons (N-0, L-+/-) predicted by the type-III seesaw theory formulated to explain the origin of small neutrino masses is presented. The decay channels N-0 - GT W(+/-)l(+/-) (l = e, mu, tau) and L-+/- - GT W(+/-)v (v = v(e), v(mu), v(tau)) are considered. The analysis is performed using the final state that contains two leptons (electrons or muons), two jets from a hadronically decaying W boson and large missing transverse momentum. The data used in the measurement correspond to an integrated luminosity of 20.3 fb(-1) of pp collisions at root s = 8 TeV collected by the ATLAS detector at the LHC. No evidence of heavy lepton pair production is observed. Heavy leptons with masses below 325-540 GeV are excluded at the 95% confidence level, depending on the theoretical scenario considered.",
journal = "Physical Review D",
title = "Search for type-III seesaw heavy leptons in pp collisions at root s=8 TeV with the ATLAS detector",
volume = "92",
number = "3",
doi = "10.1103/PhysRevD.92.032001"
}

Aad, G., Agatonović-Jovin, T., Bogavac, D., Bozic, I., Dimitrievska, A., Krstić, J., Mamužić, J., Marjanović, M., Popović, D. S., Sijacki, Dj., Simić, Lj., Vranješ, N., Vranješ Milosavljević, M.,& Živković, L.. (2015). Search for type-III seesaw heavy leptons in pp collisions at root s=8 TeV with the ATLAS detector. in Physical Review D, 92(3).
https://doi.org/10.1103/PhysRevD.92.032001

Aad G, Agatonović-Jovin T, Bogavac D, Bozic I, Dimitrievska A, Krstić J, Mamužić J, Marjanović M, Popović DS, Sijacki D, Simić L, Vranješ N, Vranješ Milosavljević M, Živković L. Search for type-III seesaw heavy leptons in pp collisions at root s=8 TeV with the ATLAS detector. in Physical Review D. 2015;92(3).
doi:10.1103/PhysRevD.92.032001 .

Aad, G., Agatonović-Jovin, Tatjana, Bogavac, D., Bozic, I., Dimitrievska, A., Krstić, Jelena, Mamužić, Judita, Marjanović, M., Popović, D. S., Sijacki, Dj., Simić, Lj., Vranješ, Nenad, Vranješ Milosavljević, Marija, Živković, Lada, "Search for type-III seesaw heavy leptons in pp collisions at root s=8 TeV with the ATLAS detector" in Physical Review D, 92, no. 3 (2015),
https://doi.org/10.1103/PhysRevD.92.032001 . .