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.

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.J., et al. (2025). Observation of double parton scattering in same-sign W boson pair production in pp collisions at √s=13 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 870 [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

Cerri A.;
2025-01-01

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
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N.J., et al. (2025). Observation of double parton scattering in same-sign W boson pair production in pp collisions at √s=13 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 870 [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/11365/1317751