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

The ATLAS collaboration

doi:10.1016/j.physletb.2024.138865

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

The ATLAS collaboration

School of Physics and Astronomy

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

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 |V_eN|² and |V_eNV_μN^⁎| parameters for heavy Majorana neutrino masses between 50 GeV and 20 TeV, where V_ℓN 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.

Original language	English
Article number	138865
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	856
DOIs	https://doi.org/10.1016/j.physletb.2024.138865
State	Published - Sep 2024

Funding

Funders	Funder number
BSF-NSF
BNL
DRAC
La Caixa Banking Foundation
BMWFW
NAWA
European Union, Future Artificial Intelligence Research
European Organization for Nuclear Research
SERI
FAPESP
Polish National Science Centre
ANPCyT
CEA-DRF
Horizon 2020, ICSC-NextGenerationEU
MNiSW
H2020 Marie Skłodowska-Curie Actions
CFI
CAS
INFN-CNAF
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministry of Science and Innovation
Wallenberg Foundation
ISF
Leverhulme Trust
Baden-Württemberg Stiftung
PROMETEO
Neubauer Family Foundation
Javna Agencija za Raziskovalno Dejavnost RS
Generalitat de Catalunya
Instituto Nazionale di Fisica Nucleare
IFA
FCT
BCKDF
MSSR
ERDF
Agencia Nacional de Investigación y Desarrollo
CNRST
NSF
Canarie
GridKA
Horizon 2020 Framework Programme
Göran Gustafssons Stiftelser
MIZŠ
NRF
European Commission
MESTD
DOE
EU-ESF
COST
CRC
RGC
SNSF
ARC
PRIMUS
ARRS
MEXT
ICSC
ANR
HGF
FWF
STFC
MEYS CR
NSERC
Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science
GenT Programmes Generalitat Valenciana, Spain
DNRF
BMBF
Ministry of Sports and Education
ANID
Cantons of Bern and Geneva
NRC
KIT
MICINN
MNE
Royal Society
Minerva Foundation
NWO
MoST
IRFU
Generalitat Valenciana
CERN
DFG
AvH Foundation
DSI
INFN
CNPq
FAIR-NextGenerationEU	PE00000013
Norwegian Financial Mechanism	2014-2021
National Natural Science Foundation of China	12275265, 12175119, NSFC-12075060
National Natural Science Foundation of China
European Research Council	101089007, 948254
European Research Council
JSPS	JP21H05085, JP22H04944, JP22H01227, JP22KK0227
MUCCA	CHIST-ERA-19-XAI-00
Swedish Research Council	VR 2018-00482, 2021-03651, VR 2022-04683, VR 2023-03403, VR 2022-03845, 2023-04654
Agence Nationale de la Recherche	ANR-20-CE31-0013, ANR-21-CE31-0013, ANR-21-CE31-0022
Agence Nationale de la Recherche
ERC	101089007
GenT Programmes Generalitat Valenciana	CIDEGENT/2019/023, CIDEGENT/2019/027
NCN	UMO-2022/47/O/ST2/00148, UMO-2020/37/B/ST2/01043, UMO-2019/34/E/ST2/00393, 2022/47/B/ST2/03059, 2021/42/E/ST2/00350, UMO-2021/40/C/ST2/00187, UMO-2023/49/B/ST2/04085
Norges Forskningsråd	RCN-314472
Norges Forskningsråd
NDGF	CC-IN2P3
U.S. Department of Energy	ECA DE-AC02-76SF00515
U.S. Department of Energy
MCIN	PID2021-125273NB, RYC2021-031273-I, RYC2022-038164-I, PCI2022-135018-2, RYC2020-030254-I, RYC2019-028510-I
NSFC	NSFC-12075060
Czech Science Foundation	GACR - 24-11373S
Polish National Agency for Academic Exchange	PPN/PPO/2020/1/00002/U/00001
Deutsche Forschungsgemeinschaft	DFG - CR 312/5-2, DFG - 469666862
Deutsche Forschungsgemeinschaft
Investissements d'Avenir Labex	ANR-11-LABX-0012
CERN-CZ	21/SCI/017
FEDER	IDIFEDER/2018/048
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	RPG-2020-004, PCEFP2_194658, NIF-R1-231091
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Ministry of Science and Technology of the People's Republic of China	MOST-2023YFA1605700
Ministry of Science and Technology of the People's Republic of China
Japan Society for the Promotion of Science	JP21H05085, JP22H04944, JP22H01227, JP22KK0227
Japan Society for the Promotion of Science
DNSRC	IN2P3-CNRS
ARIS	J1-3010
FORTE	PRIMUS/21/SCI/017, CZ.02.01.01/00/22_008/0004632
FONDECYT	1230987, 1230812, 1190886, 1210400
Knut och Alice Wallenbergs Stiftelse	KAW 2022.0358, KAW 2018.0157, KAW 2018.0458, KAW 2019.0447
Knut och Alice Wallenbergs Stiftelse

Access to Document

10.1016/j.physletb.2024.138865

Cite this

@article{116e2bb83f8a46ef9cdb3298c9dedc5f,

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 = "{The 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 L. Barak and G. Bella and Y. Benhammou and Biswal, {J. P.} and E. Etzion and O. Kuprash and Lutz, {M. S.} and R. Nayak and D. Reikher and A. Soffer and Tamir, {N. M.}",

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 = "אנגלית",

volume = "856",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - 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

AU - The ATLAS collaboration

AU - Aad, G.

AU - Aakvaag, E.

AU - Abbott, B.

AU - Abdelhameed, S.

AU - Abeling, K.

AU - Abicht, N. J.

AU - Abidi, S. H.

AU - Aboelela, M.

AU - Aboulhorma, A.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Ackermann, A.

AU - Adam Bourdarios, C.

AU - Adamczyk, 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 - Akbiyik, M.

AU - Åkesson, T. P.A.

AU - Akimov, A. V.

AU - Barak, L.

AU - Bella, G.

AU - Benhammou, Y.

AU - Biswal, J. P.

AU - Etzion, E.

AU - Kuprash, O.

AU - Lutz, M. S.

AU - Nayak, R.

AU - Reikher, D.

AU - Soffer, A.

AU - Tamir, N. M.

PY - 2024/9

Y1 - 2024/9

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85195170275&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2024.138865

DO - 10.1016/j.physletb.2024.138865

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:85195170275

SN - 0370-2693

VL - 856

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 138865

ER -

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

Funding

Access to Document

Other files and links

Fingerprint

Cite this