@article{59d95e6a68934c1a97197699b8feb859,
title = "Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s=13 TeV",
abstract = "A search for Majorana neutrinos in same-sign WW scattering events is presented. The analysis uses s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb - 1 recorded during 2015–2018 by the ATLAS detector at the Large Hadron Collider. The analysis targets final states including exactly two same-sign muons and at least two hadronic jets well separated in rapidity. The modelling of the main backgrounds, from Standard Model same-sign WW scattering and WZ production, is constrained with data in dedicated signal-depleted control regions. The distribution of the transverse momentum of the second-hardest muon is used to search for signals originating from a heavy Majorana neutrino with a mass between 50 GeV and 20 TeV. No significant excess is observed over the background expectation. The results are interpreted in a benchmark scenario of the Phenomenological Type-I Seesaw model. In addition, the sensitivity to the Weinberg operator is investigated. Upper limits at the 95% confidence level are placed on the squared muon-neutrino–heavy-neutrino mass-mixing matrix element | VμN| 2 as a function of the heavy Majorana neutrino{\textquoteright}s mass mN , and on the effective μμ Majorana neutrino mass | mμμ| .",
author = "{ATLAS Collaboration} and G. Aad and B. Abbott and K. Abeling and Abicht, {N. J.} and Abidi, {S. H.} and A. Aboulhorma and H. Abramowicz and H. Abreu and Y. Abulaiti and {Abusleme Hoffman}, {A. C.} and Acharya, {B. S.} and {Adam Bourdarios}, C. and L. Adamczyk and L. Adamek 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 I. Aizenberg and M. Akbiyik and {\AA}kesson, {T. P.A.} and Akimov, {A. V.} and D. Akiyama and Akolkar, {N. N.} and Khoury, {K. Al} and Alberghi, {G. L.} and J. Albert and P. Albicocco and Albouy, {G. L.} and Forti, {A. C.} and {Munoz Sanchez}, {F. J.} and A. Oh and D. Price and M. Queitsch-Maitland and Matthew Addison and Mohamed Aly and Maximilian Amerl and Volker Austrup and {Baron Moreno}, Diego and Candice Basson and Callum Birch-Sykes and Alexander Bitadze and {Da Via}, Cinzia and Caterina Doglioni and Patrick Dougan and Matteo D'Uffizi and Samuel Dysch and Tobias Fitschen and Robert Hankache and Thomas Hitchings and Benjamin Honan and Z Huang and Zak Lawrence and Brian Le and Matt LeBlanc and Jiri Masik 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 Yang Qin and SM Shaw and Sukanya Sinha and Valentina Vecchio and BJ Wilson and JK Winter and Wyatt, {T. R.}",
note = "Publisher Copyright: {\textcopyright} 2023, CERN for the benefit of the ATLAS Collaboration.",
year = "2023",
month = sep,
doi = "10.1140/epjc/s10052-023-11915-y",
language = "English",
volume = "83",
journal = " European Physical Journal C",
issn = "1434-6044",
publisher = "Springer Nature",
number = "9",
}