Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s=13 TeV

ATLAS Collaboration; Matthew Addison; Mohamed Aly; Maximilian Amerl; Volker Austrup; Diego Baron Moreno; Candice Basson; Callum Birch-Sykes; Alexander Bitadze; Cinzia Da Via; Caterina Doglioni; Patrick Dougan; Matteo D'Uffizi; Samuel Dysch; Tobias Fitschen; Robert Hankache; Thomas Hitchings; Benjamin Honan; Z Huang; Zak Lawrence; Brian Le; Matt LeBlanc; Jiri Masik; Antonio Mendes Jacques Da Costa; Martin Murin; Joleen Pater; R. F. Y. Peters; A. D.  Pilkington; Dong Qichen; Yang Qin; SM Shaw; Sukanya Sinha; Valentina Vecchio; BJ Wilson; JK Winter; T. R.  Wyatt

doi:10.1140/epjc/s10052-023-11915-y

Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s=13 TeV

ATLAS Collaboration
, Matthew Addison
, Mohamed Aly
, Maximilian Amerl
, Volker Austrup
, Diego Baron Moreno
, Candice Basson
, Callum Birch-Sykes
, Alexander Bitadze
, Cinzia Da Via
, Caterina Doglioni
, Patrick Dougan
, Matteo D'Uffizi
, Samuel Dysch
, Tobias Fitschen
, Robert Hankache
, Thomas Hitchings
, Benjamin Honan
, Z Huang
, Zak Lawrence

Brian Le, Matt LeBlanc, Jiri Masik, Antonio Mendes Jacques Da Costa, Martin Murin, Joleen Pater, R. F. Y. Peters, A. D. Pilkington, Dong Qichen, Yang Qin, SM Shaw, Sukanya Sinha, Valentina Vecchio, BJ Wilson, JK Winter, T. R. Wyatt

Pontificia Universidad Javeriana
University of Bucharest
iThemba Labs
University of South Africa
University of Zululand
New York University Abu Dhabi
University of Granada
CERN (European Organisation for Nuclear Research)
CNRS/IN2P3
University of Oklahoma
Georg-August-Universitat Gottingen
Technische Universität Dortmund
Brookhaven National Laboratory
UNIVERSITE MOHAMMED VI POLYTECHNIQUE
Tel Aviv University
Technion - Israel Institute of Technology
New York University
Pontificia Universidad Catolica de Chile (Catholic University of Chile)
INFN Sezione di Bari
The International Centre for Theoretical Physics (ICTP)
King's College London
CNRS/IN2P3
AGH University of Science and Technology
University of Toronto
Brandeis University
Northern Illinois University
University of Istanbul
Rutherford Appleton Laboratory
Santa Cruz Institute for Particle Physics
Institut de Física d'Altes Energies (IFAE)
INFN Sezione di Pavia
Universita Degli Studi di Pavia
Johannes Gutenberg-Universitat Mainz
Alexandru Ioan Cuza University of Iasi
National Academy of Sciences of Azerbaijan
McGill University
Royal Holloway, University of London
Zhengzhou University
INFN Sezione di Roma2
Universita Degli Studi Di Roma Tor Vergata
Universitat de Valencia
Réseau Universitaire de Physique des Hautes Energies - Université Hassan II
Weizmann Institute of Science
Lund University
Waseda University
University of Bonn
Columbia University
INFN-Sezione di Bologna
University of Victoria
Laboratori Nazionali di Frascati (INFN)
Universite Joseph Fourier - Grenoble 1

Research output: Contribution to journal › Article › peer-review

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 | V_μ_N| ² as a function of the heavy Majorana neutrino’s mass m_N , and on the effective μμ Majorana neutrino mass | m_μ_μ| .

Original language	English
Article number	824
Pages (from-to)	1-26
Number of pages	26
Journal	European Physical Journal C
Volume	83
Issue number	9
DOIs	https://doi.org/10.1140/epjc/s10052-023-11915-y
Publication status	Published - 15 Sept 2023

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10.1140/epjc/s10052-023-11915-y

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ATLAS Collaboration , Addison, M., Aly, M., Amerl, M., Austrup, V., Baron Moreno, D., Basson, C., Birch-Sykes, C., Bitadze, A., Da Via, C., Doglioni, C., Dougan, P., D'Uffizi, M., Dysch, S., Fitschen, T., Hankache, R., Hitchings, T., Honan, B., Huang, Z., ... Wyatt, T. R. (2023). Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s=13 TeV. European Physical Journal C, 83(9), 1-26. Article 824. https://doi.org/10.1140/epjc/s10052-023-11915-y

@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,

day = "15",

doi = "10.1140/epjc/s10052-023-11915-y",

language = "English",

volume = "83",

pages = "1--26",

journal = " European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "9",

}

ATLAS Collaboration , Addison, M, Aly, M, Amerl, M, Austrup, V, Baron Moreno, D, Basson, C, Birch-Sykes, C, Bitadze, A, Da Via, C , Doglioni, C, Dougan, P, D'Uffizi, M, Dysch, S, Fitschen, T, Hankache, R, Hitchings, T, Honan, B, Huang, Z, Lawrence, Z, Le, B, LeBlanc, M, Masik, J, Mendes Jacques Da Costa, A, Murin, M, Pater, J, Peters, RFY , Pilkington, AD, Qichen, D, Qin, Y, Shaw, SM, Sinha, S, Vecchio, V, Wilson, BJ, Winter, JK & Wyatt, TR 2023, 'Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s=13 TeV', European Physical Journal C, vol. 83, no. 9, 824, pp. 1-26. https://doi.org/10.1140/epjc/s10052-023-11915-y

TY - JOUR

T1 - Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s=13 TeV

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abeling, K.

AU - Abicht, N. J.

AU - Abidi, S. H.

AU - Aboulhorma, A.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Abusleme Hoffman, A. C.

AU - Acharya, B. S.

AU - Adam Bourdarios, C.

AU - Adamczyk, L.

AU - Adamek, L.

AU - Addepalli, S. V.

AU - Addison, M. J.

AU - Adelman, J.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agaras, M. N.

AU - Agarwala, J.

AU - Aggarwal, A.

AU - Agheorghiesei, C.

AU - Ahmad, A.

AU - Ahmadov, F.

AU - Ahmed, W. S.

AU - Ahuja, S.

AU - Ai, X.

AU - Aielli, G.

AU - Aikot, A.

AU - Ait Tamlihat, M.

AU - Aitbenchikh, B.

AU - Aizenberg, I.

AU - Akbiyik, M.

AU - Åkesson, T. P.A.

AU - Akimov, A. V.

AU - Akiyama, D.

AU - Akolkar, N. N.

AU - Khoury, K. Al

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albicocco, P.

AU - Albouy, G. L.

AU - Forti, A. C.

AU - Munoz Sanchez, F. J.

AU - Oh, A.

AU - Price, D.

AU - Queitsch-Maitland, M.

AU - Addison, Matthew

AU - Aly, Mohamed

AU - Amerl, Maximilian

AU - Austrup, Volker

AU - Baron Moreno, Diego

AU - Basson, Candice

AU - Birch-Sykes, Callum

AU - Bitadze, Alexander

AU - Da Via, Cinzia

AU - Doglioni, Caterina

AU - Dougan, Patrick

AU - D'Uffizi, Matteo

AU - Dysch, Samuel

AU - Fitschen, Tobias

AU - Hankache, Robert

AU - Hitchings, Thomas

AU - Honan, Benjamin

AU - Huang, Z

AU - Lawrence, Zak

AU - Le, Brian

AU - LeBlanc, Matt

AU - Masik, Jiri

AU - Mendes Jacques Da Costa, Antonio

AU - Murin, Martin

AU - Pater, Joleen

AU - Peters, R. F. Y.

AU - Pilkington, A. D.

AU - Qichen, Dong

AU - Qin, Yang

AU - Shaw, SM

AU - Sinha, Sukanya

AU - Vecchio, Valentina

AU - Wilson, BJ

AU - Winter, JK

AU - Wyatt, T. R.

PY - 2023/9/15

Y1 - 2023/9/15

N2 - 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’s mass mN , and on the effective μμ Majorana neutrino mass | mμμ| .

AB - 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’s mass mN , and on the effective μμ Majorana neutrino mass | mμμ| .

UR - https://www.scopus.com/pages/publications/85171580591

U2 - 10.1140/epjc/s10052-023-11915-y

DO - 10.1140/epjc/s10052-023-11915-y

M3 - Article

AN - SCOPUS:85171580591

SN - 1434-6044

VL - 83

SP - 1

EP - 26

JO - European Physical Journal C

JF - European Physical Journal C

IS - 9

M1 - 824

ER -

Search for Majorana neutrinos in same-sign WW scattering events from pp collisions at √s=13 TeV

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