@article{4acea146ff3949c4a8f12466c5b37acf,
title = "Search for heavy Majorana neutrinos in e±e± and e±μ± final states via WW scattering in pp collisions at s=13 TeV with the ATLAS detector",
abstract = "A search for heavy Majorana neutrinos in scattering of same-sign W boson pairs in proton–proton collisions at s=13 TeV at the LHC is reported. The dataset used corresponds to an integrated luminosity of 140 fb−1, collected with the ATLAS detector during 2015–2018. The search is performed in final states including a same-sign ee or eμ pair and at least two jets with large invariant mass and a large rapidity difference. No significant excess of events with respect to the Standard Model background predictions is observed. The results are interpreted in a benchmark scenario of the Phenomenological Type-I Seesaw model. New constraints are set on the values of the |VeN|2 and |VeNVμN⁎| parameters for heavy Majorana neutrino masses between 50 GeV and 20 TeV, where VℓN is the matrix element describing the mixing of the heavy Majorana neutrino mass eigenstate with the Standard Model neutrino of flavour ℓ=e,μ. The sensitivity to the Weinberg operator is investigated and constraints on the effective ee and eμ Majorana neutrino masses are reported. The statistical combination of the ee and eμ channels with the previously published μμ channel is performed.",
author = "{ATLAS Collaboration} and G. Aad and E. Aakvaag and B. Abbott and S. Abdelhameed and K. Abeling and Abicht, {N. J.} and Abidi, {S. H.} and M. Aboelela and A. Aboulhorma and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, {B. S.} and A. Ackermann and {Adam Bourdarios}, C. and L. Adamczyk and Addepalli, {S. V.} and Addison, {M. J.} and J. Adelman and A. Adiguzel and T. Adye and Affolder, {A. A.} and Y. Afik and Agaras, {M. N.} and J. Agarwala and A. Aggarwal and C. Agheorghiesei and A. Ahmad and F. Ahmadov and Ahmed, {W. S.} and S. Ahuja and X. Ai and G. Aielli and A. Aikot and {Ait Tamlihat}, M. and B. Aitbenchikh and M. Akbiyik and {\AA}kesson, {T. P.A.} and Akimov, {A. V.} and D. Akiyama and Akolkar, {N. N.} and S. Aktas and {Al Khoury}, K. and Alberghi, {G. L.} and J. Albert and Forti, {A. C.} and {Munoz Sanchez}, {F. J.} and A. Oh and D. Price and M. Queitsch-Maitland and Mohamed Aly and Maximilian Amerl and Volker Austrup and {Baron Moreno}, Diego and {Da Via}, Cinzia and Caterina Doglioni and Patrick Dougan and Matteo D'Uffizi and Tobias Fitschen and Thomas Hitchings and Benjamin Honan and Z. Huang and Zak Lawrence and Brian Le and Matt LeBlanc and Jiri Masik and May, {A E} and {Mendes Jacques Da Costa}, Antonio and Martin Murin and Joleen Pater and Peters, {R. F. Y.} and Pilkington, {A. D.} and Dong Qichen and Shaw, {S M} and Simpson, {E L} and Sukanya Sinha and Smith, {J L} and Valentina Vecchio and Wilson, {B J} and Winter, {J K} and Wyatt, {T. R.}",
note = "Publisher Copyright: {\textcopyright} 2024 CERN for the benefit of the ATLAS Collaboration",
year = "2024",
month = sep,
doi = "10.1016/j.physletb.2024.138865",
language = "English",
volume = "856",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier BV",
}