Evidence for longitudinally polarized bosons in the electroweak production of same-sign boson pairs in association with two jets in pp collisions at TeV with the ATLAS detector
arXiv:2503.11317 · doi:10.1103/bpln-ccql
Abstract
This Letter reports the first evidence of production of same-sign boson pairs where at least one of the bosons is longitudinally polarized and the most stringent constraint to date for the production of two longitudinally polarized same-sign bosons. The data set used corresponds to an integrated luminosity of 140 fb of proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the ATLAS detector during Run 2 of the Large Hadron Collider. The study is performed in final states including two same-sign leptons (electrons or muons), missing transverse momentum, and at least two jets with a large invariant mass and a large rapidity difference. Two independent fits are performed targeting the production of same-sign bosons with at least one, or two longitudinally polarized bosons. The observed (expected) significance of the production with at least one longitudinally polarized boson is 3.3 (4.0) standard deviations. An observed (expected) 95% confidence level upper limit of 0.45 (0.70) fb is reported on the fiducial production cross section of two longitudinally polarized same-sign bosons.
38 pages in total, author list starting page 21, 4 figures, 5 tables, published Phys. Rev. Lett. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2019-29/
References in corpus (4)
- Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
- Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
- A parton shower algorithm based on Catani-Seymour dipole factorisation
- Measurements of production cross sections of WZ and same-sign WW boson pairs in association with two jets in proton-proton collisions at 13 TeV