This letter reports the measurement of double parton scattering in same-sign W boson pair production with the ATLAS detector. The data set used corresponds to an integrated luminosity of 140 fb−1 of proton–proton collisions at a center-of-mass energy of 13 TeV, collected during Run 2 of the Large Hadron Collider. The study is performed in final states including two same-charge leptons, electron or muon, missing transverse momentum, and up to one jet. An excess of events is observed over the expected background contributions with a significance of 8.8 standard deviations. The measured fiducial cross section times leptonic branching fraction is 4.59±0.64 fb. The measurement corresponds to a double parton scattering effective cross section of 10.6±1.8 mb.

Observation of double parton scattering in same-sign W boson pair production in pp collisions at s=13 TeV with the ATLAS detector / Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.J., Abidi, S.H., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abulaiti, Y., Acharya, B.S., Ackermann, A., Bourdarios, C.A., Adamczyk, L., Addepalli, S.V., Addison, M.J., Adelman, J., Adiguzel, A., Adye, T., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 870:(2025). [10.1016/j.physletb.2025.139892]

Observation of double parton scattering in same-sign W boson pair production in pp collisions at s=13 TeV with the ATLAS detector

Aloisio A.;Canale V.;Casolaro P.;Cirotto F.;D'Avanzo A.;Della Pietra M.;Iengo P.;Massarotti P.;Rossi E.;
2025

Abstract

This letter reports the measurement of double parton scattering in same-sign W boson pair production with the ATLAS detector. The data set used corresponds to an integrated luminosity of 140 fb−1 of proton–proton collisions at a center-of-mass energy of 13 TeV, collected during Run 2 of the Large Hadron Collider. The study is performed in final states including two same-charge leptons, electron or muon, missing transverse momentum, and up to one jet. An excess of events is observed over the expected background contributions with a significance of 8.8 standard deviations. The measured fiducial cross section times leptonic branching fraction is 4.59±0.64 fb. The measurement corresponds to a double parton scattering effective cross section of 10.6±1.8 mb.
2025
Observation of double parton scattering in same-sign W boson pair production in pp collisions at s=13 TeV with the ATLAS detector / Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.J., Abidi, S.H., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abulaiti, Y., Acharya, B.S., Ackermann, A., Bourdarios, C.A., Adamczyk, L., Addepalli, S.V., Addison, M.J., Adelman, J., Adiguzel, A., Adye, T., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 870:(2025). [10.1016/j.physletb.2025.139892]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/1026934
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