Articulo
Observation and Measurement of Forward Proton Scattering in Association with Lepton Pairs Produced via the Photon Fusion Mechanism at ATLAS
Registro en:
issn:1079-7114
issn:0031-9007
Autor
Alonso, Francisco
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Institución
Resumen
The observation of forward proton scattering in association with lepton pairs (e⁺e⁻ + p or μ⁺μ⁻ + p) produced via photon fusion is presented. The scattered proton is detected by the ATLAS Forward Proton spectrometer, while the leptons are reconstructed by the central ATLAS detector. Proton-proton collision data recorded in 2017 at a center-of-mass energy of √s = 13 TeV are analyzed, corresponding to an integrated luminosity of 14.6 fb⁻¹. A total of 57 (123) candidates in the ee + p (μμ + p) final state are selected, allowing the background-only hypothesis to be rejected with a significance exceeding 5 standard deviations in each channel. Proton-tagging techniques are introduced for cross-section measurements in the fiducial detector acceptance, corresponding to σ<sub>ee+</sub> = 11.0 ± 2.6(stat) ± 1.2(syst) ± 0.3(lumi) and σ<sub>μμ+p</sub> = 7.2 ± 1.6(stat) ± 0.9(syst) ± 0.2(lumi) fb in the dielectron and dimuon channel, respectively. La lista completa de autores que integran el documento puede consultarse en el archivo. Facultad de Ciencias Exactas Instituto de Física La Plata