Measurement of the four-lepton invariant mass spectrum in 13 TeV proton-proton collisions with the ATLAS detector
- Author(s): Aaboud, M
- Aad, G
- Abbott, B
- Abdinov, O
- Abeloos, B
- Abhayasinghe, DK
- Abidi, SH
- AbouZeid, OS
- Abraham, NL
- Abramowicz, H
- Abreu, H
- Abulaiti, Y
- Acharya, BS
- Adachi, S
- Adam, L
- Adamczyk, L
- Adelman, J
- Adersberger, M
- Adiguzel, A
- Adye, T
- Affolder, AA
- Afik, Y
- Agheorghiesei, C
- Aguilar-Saavedra, JA
- Ahmadov, F
- Aielli, G
- Akatsuka, S
- Åkesson, TPA
- Akilli, E
- Akimov, AV
- Alberghi, GL
- Albert, J
- Albicocco, P
- Alconada Verzini, MJ
- Alderweireldt, S
- Aleksa, M
- Aleksandrov, IN
- Alexa, C
- Alexandre, D
- Alexopoulos, T
- Alhroob, M
- Ali, B
- Alimonti, G
- Alison, J
- Alkire, SP
- Allaire, C
- Allbrooke, BMM
- Allen, BW
- Allport, PP
- Aloisio, A
- Alonso, A
- Alonso, F
- Alpigiani, C
- Alshehri, AA
- Alstaty, MI
- Alvarez Gonzalez, B
- Álvarez Piqueras, D
- Alviggi, MG
- Amadio, BT
- Amaral Coutinho, Y
- Ambler, A
- Ambroz, L
- Amelung, C
- Amidei, D
- Amor Dos Santos, SP
- Amoroso, S
- Amrouche, CS
- An, F
- Anastopoulos, C
- Ancu, LS
- Andari, N
- Andeen, T
- Anders, CF
- Anders, JK
- Anderson, KJ
- Andreazza, A
- Andrei, V
- Anelli, CR
- Angelidakis, S
- Angelozzi, I
- Angerami, A
- Anisenkov, AV
- Annovi, A
- Antel, C
- Anthony, MT
- Antonelli, M
- Antrim, DJA
- Anulli, F
- Aoki, M
- Aparisi Pozo, JA
- Aperio Bella, L
- Arabidze, G
- Araque, JP
- Araujo Ferraz, V
- Araujo Pereira, R
- Arce, ATH
- Ardell, RE
- Arduh, FA
- Arguin, JF
- Argyropoulos, S
- et al.
Abstract
© 2019, The Author(s). A measurement of the four-lepton invariant mass spectrum is made with the ATLAS detector, using an integrated luminosity of 36.1 fb −1 of proton-proton collisions at s = 13 TeV delivered by the Large Hadron Collider. The differential cross-section is measured for events containing two same-flavour opposite-sign lepton pairs. It exhibits a rich structure, with different mass regions dominated in the Standard Model by single Z boson production, Higgs boson production, and Z boson pair production, and non-negligible interference effects at high invariant masses. The measurement is compared with state-of-the-art Standard Model calculations, which are found to be consistent with the data. These calculations are used to interpret the data in terms of gg → ZZ → 4ℓ and Z → 4ℓ subprocesses, and to place constraints on a possible contribution from physics beyond the Standard Model.[Figure not available: see fulltext.].