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Ruben Guevara

Doctoral Research Fellow - High Energy Physics

Email ruben.guevara@fys.uio.no

Room Ø375

Available hours Whenever I am there! (I also respond mails)

Username

Visiting address Sem Sælands vei 24 Fysikkbygningen 0371 Oslo

Postal address Postboks 1048 Blindern 0316 Oslo

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Academic interests

I am looking for two Higgs guys in this experiment called the LHC with the ATLAS detector. Instead of using my eyes, I use machine learning methods such as Likelihood-Free Inference / Simulation based inference to look for the Higgs guys. Also playing around with quantum machine learning!

Courses taught

Autumn

FYS1400 - Introduction to quantum technology

Spring

Previous courses

Background

MSc Nuclear and Particle Physics, University of Oslo (2023)
BSc Physics and Astronomy, University of Oslo (2021)

Tags: Particle physics, CERN, LHC, ATLAS, Higgs boson, Statistics

Publications

Scientific articles and book chapters

Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,934 contributors for this article] (2026). Precise measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from √s=13TeVpp collisions with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 86(5). doi: 10.1140/epjc/s10052-026-15311-0. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,925 contributors for this article] (2026). Characterization of nuclear breakup as a function of hard-scattering kinematics using dijets measured by ATLAS in p+Pb collisions. Physics Letters B. ISSN 0370-2693. 877. doi: 10.1016/j.physletb.2026.140440.
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,939 contributors for this article] (2026). Search for a resonance decaying into a scalar particle and a Higgs boson in the final state with two bottom quarks and two photons with 199 fb−1 of data collected at √s=13 and 13.6 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 877. doi: 10.1016/j.physletb.2026.140425. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,842 contributors for this article] (2026). Search for massive, long-lived particles in events with displaced vertices and displaced muons in pp collisions at √s=13.6 TeV with the ATLAS experiment. Physics Letters B. ISSN 0370-2693. 878. doi: 10.1016/j.physletb.2026.140509. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,939 contributors for this article] (2026). Search for higgsinos in compressed mass spectra using low-momentum tracks in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(6). doi: 10.1007/JHEP06(2026)094. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,859 contributors for this article] (2026). Search for dimuon resonance in the 35 to 75 GeV mass range using 140 fb−1 of 13 TeV pp collisions with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(6). doi: 10.1007/JHEP06(2026)165. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,863 contributors for this article] (2026). Combined effective field theory interpretation of measurements sensitive to quartic gauge boson couplings in pp collisions at √s=13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 879. doi: 10.1016/j.physletb.2026.140683. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,934 contributors for this article] (2026). Differential cross-section measurements of coherent production of singly and doubly resonant top-quark in WWbb events with one lepton at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(7). doi: 10.1007/JHEP07(2026)028. Full text in Research Archive
Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,932 contributors for this article] (2026). Search for emerging jets in pp collisions at √s=13TeV with the ATLAS experiment. European Physical Journal C. ISSN 1434-6044. 86(7). doi: 10.1140/epjc/s10052-026-15693-1. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,860 contributors for this article] (2026). Measurement of the |Vcb| element of the CKM matrix in tt¯ decays with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(7). doi: 10.1007/JHEP07(2026)078. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,860 contributors for this article] (2026). Measurement of the Higgs boson production in association with top quarks in multilepton final states in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(5). doi: 10.1007/JHEP05(2026)183. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,934 contributors for this article] (2026). Measurement of differential t-channel single top (anti)quark production cross-sections at 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(5). doi: 10.1007/JHEP05(2026)174. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,933 contributors for this article] (2026). Search for long-lived particles using displaced vertices of oppositely charged leptons in 140fb−1 of pp collisions at √s=13 TeV with the ATLAS detector. Physics Letters B. ISSN 0370-2693. 878. doi: 10.1016/j.physletb.2026.140497. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,938 contributors for this article] (2026). Study of Higgs boson pair production in the HH→bb‾γγ final state with 308 fb−1 of data collected at √s= 13 TeV and 13.6 TeV by the ATLAS experiment. Physics Letters B. ISSN 0370-2693. 876. doi: 10.1016/j.physletb.2026.140280. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,923 contributors for this article] (2026). Search for Higgs bosons produced in association with a high-energy photon via vector-boson fusion and decaying to a pair of b-quarks in the ATLAS detector. Physics Letters B. ISSN 0370-2693. doi: 10.1016/j.physletb.2026.140279. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,925 contributors for this article] (2026). Measurement of coherent exclusive J/ψ → μ+μ−production in ultraperipheral Pb+Pb collisions at √sNN = 5.36 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(4). doi: 10.1007/JHEP04(2026)020. Full text in Research Archive
Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,931 contributors for this article] (2026). Search for Beyond the Standard Model physics with anomaly detection in multilepton final states in pp collisions at √s = 13 TeV with the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 86(3). doi: 10.1140/epjc/s10052-025-15218-2. Full text in Research Archive
Aad, G.; Aakvaag, Erlend; Abbott, B.; Abdelhameed, S.; Abeling, K. & Abicht, N. J. [Show all 2,929 contributors for this article] (2026). Measurement of the top-quark Yukawa coupling from tt production in the lepton+jets final state using pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). ISSN 1126-6708. 2026(1). doi: 10.1007/JHEP01(2026)117. Full text in Research Archive
Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,929 contributors for this article] (2026). Search for heavy neutral leptons in decays of W bosons produced in 13 TeV pp collisions using prompt signatures in the ATLAS detector. European Physical Journal C. ISSN 1434-6044. 86(2). doi: 10.1140/epjc/s10052-025-15191-w. Full text in Research Archive
Zwalinski, L.; Zormpa, O.; Zorbas, T. G.; Zografos, A.; Zoch, K. & Zoccoli, A. [Show all 2,926 contributors for this article] (2026). Transforming jet flavour tagging at ATLAS. Nature Communications. 17(1). doi: 10.1038/s41467-025-65059-6. Full text in Research Archive

View all works in NVA

Published Sep. 15, 2023 5:52 PM - Last modified Feb. 25, 2026 11:19 AM

Projects

The ATLAS Experiment at UiO

Research groups

High Energy Physics (HEP)