Stefania Xella

Stefania Xella

Associate Professor, Guest Researcher


  1. Published

    Search for displaced vertices of oppositely charged leptons from decays of long-lived particles in pp collisions at root s=13 TeV with the ATLAS detector

    Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abhayasinghe, DK., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Alonso Diaz, A., Bajic, M., hqz214, H., Camplani, A., Dam, M., Hansen, P. H., Hansen, J. B., Hansen, J. D. & 8 others, Galster, G. A. G. K., Monk, J. W., Ignazzi, R., Petersen, Troels Christian, Stark, S. H., Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 10 Feb 2020, In: Physics Letters B. 801, 21 p., 135114.

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Published

    Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in root s=13 TeV pp collisions with the ATLAS detector

    Aad, G., Abbott, B., Abbott, DC., Abud, AA., Abeling, K., Abhayasinghe, DK., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Camplani, A., Dam, M., Galster, G. A. G. K., Hansen, P. H., Hansen, J. D., Hansen, J. B., Ignazzi, R., Monk, J. W., Petersen, T. C., Wiglesworth, G. & 3 others, Xella, Stefania, Stark, S. H. & ATLAS Collaboration, A. C., 7 Apr 2020, In: Physical Review D. 101, 7, 32 p., 072001.

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Published

    Search for flavour-changing neutral currents in processes with one top quark and a photon using 81 fb(-1) of pp collisions at root s=13 TeV with the ATLAS experiment

    Aad, G., Abbott, B., Abbott, DC., Abud, AA., Abeling, K., Abhayasinghe, DK., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Alonso Diaz, A., Bajic, M., Camplani, A., Dam, M., Galster, G. A. G. K., hqz214, H., Hansen, J. B., Hansen, P. H. & 7 others, Hansen, Jørn Dines, Monk, J. W., Ignazzi, R., Stark, S. H., Petersen, Troels Christian, Wiglesworth, Graig & Xella, Stefania, 10 Jan 2020, In: Physics Letters B. 800, 21 p., 135082.

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Published

    Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root s=8 TeV

    Aad, G., Abbott, B., Abbott, DC., Abud, AA., Abeling, K., Abhayasinghe, DK., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Alonso Diaz, A., Camplani, A., hqz214, H., Dam, M., Galster, G. A. G. K., Hansen, P. H., Hansen, J. D. & 9 others, Hansen, Jørgen Beck, Ignazzi, R., Monk, J. W., Petersen, Troels Christian, Stark, S. H., Wiglesworth, Graig, Xella, Stefania, ATLAS Collaboration, A. C. & The CMS collaboration, T. C. C., 12 Sep 2020, In: Journal of High Energy Physics (Online). 2020, 8, 67 p., 051.

    Research output: Contribution to journalJournal articleResearchpeer-review

  5. Published

    Dijet Resonance Search with Weak Supervision Using root S=13 TeV pp Collisions in the ATLAS Detector

    Aad, G., Abbott, B., Abbott, DC., Abud, AA., Abeling, K., Abhayasinghe, DK., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Achkar, B., Alonso Diaz, A., Camplani, A., Dam, M., Galster, G. A. G. K., Hansen, J. B., Hansen, P. H. & 9 others, Hansen, Jørn Dines, hqz214, H., Ignazzi, R., Monk, J. W., Petersen, Troels Christian, Stark, S. H., Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 21 Sep 2020, In: Physical Review Letters. 125, 13, 23 p., 131801.

    Research output: Contribution to journalJournal articleResearchpeer-review

  6. Published

    Constraints on Higgs boson production with large transverse momentum using H -> b(b)over-bar decays in the ATLAS detector

    Aad, G., Abbott, B., Abbott, DC., Abud, AA., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Dam, M., Camplani, A., Hansen, P. H., Hansen, J. B., Hansen, J. D., Ignazzi, R., Petersen, T. C., Wiglesworth, G., Xella, S. & 1 others, ATLAS Collaboration, A. C., 11 May 2022, In: Physical Review D. 105, 9, 37 p., 092003.

    Research output: Contribution to journalJournal articleResearchpeer-review

  7. Published

    Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment

    Aad, G., Abbott, B., Abbott, DC., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Acharya, B. S., Dam, M., Camplani, A., Hansen, J. D., Hansen, P. H., Hansen, J. B., Ignazzi, R., Petersen, T. C., Wiglesworth, G., Xella, S. & 1 others, ATLAS Collaboration, A. C., 10 Aug 2023, In: Physics Letters B. 843, 21 p., 137848.

    Research output: Contribution to journalJournal articleResearchpeer-review

  8. Published

    Measurement of the B0s → μμ effective lifetime with the ATLAS detector

    Aad, G., Abbott, B., Abeling, K., Abicht, N. J., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Dam, Mogens, Camplani, Alessandra, Hansen, Jørn Dines, Hansen, Jørgen Beck, Hansen, Peter Henrik, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 28 Sep 2023, In: Journal of High Energy Physics (Online). 2023, 09, 32 p., 199.

    Research output: Contribution to journalJournal articleResearchpeer-review

  9. Published

    Measurements of W+W- production in decay topologies inspired by searches for electroweak supersymmetry

    Aad, G., Abbott, B., Abbott, DC., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Acharya, B. S., Dam, M., Camplani, A., Hansen, J. D., Hansen, P. H., Hansen, J. B., Ignazzi, R., Petersen, T. C., Wiglesworth, G., Xella, S. & 1 others, ATLAS, A., 10 Aug 2023, In: European Physical Journal C. 83, 8, 29 p., 718.

    Research output: Contribution to journalJournal articleResearchpeer-review

  10. Published

    Measurement of exclusive pion pair production in proton-proton collisions at √s=7 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abbott, D., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Dam, Mogens, Hansen, Jørn Dines, Camplani, Alessandra, Hansen, Jørgen Beck, Hansen, Peter Henrik, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 2023, In: European Physical Journal C. 83, 7, 28 p., 627.

    Research output: Contribution to journalJournal articleResearchpeer-review

  11. Published

    Measurements of differential cross sections of Higgs boson production through gluon fusion in the H → W W* → eνμν final state at √s = 13 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Acharya, B. S., Dam, Mogens, Camplani, Alessandra, Hansen, Peter Henrik, Hansen, Jørgen Beck, Hansen, Jørn Dines, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 27 Jul 2023, In: European Physical Journal C. 83, 9, 40 p., 774.

    Research output: Contribution to journalJournal articleResearchpeer-review

  12. Published

    Search for leptoquarks decaying into the bt final state in pp collisions at √s=13 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abbott, D., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Dam, Mogens, Camplani, Alessandra, Hansen, Jørn Dines, Hansen, Peter Henrik, Hansen, Jørgen Beck, Petersen, Troels Christian, Ignazzi, R., Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 2 Oct 2023, In: Journal of High Energy Physics (Online). 2023, 10, 55 p., 001.

    Research output: Contribution to journalJournal articleResearchpeer-review

  13. Published

    Tools for estimating fake/non-prompt lepton backgrounds with the ATLAS detector at the LHC

    Aad, G., Abbott, B., Abbott, D., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Dam, Mogens, Camplani, Alessandra, Hansen, Peter Henrik, Hansen, Jørn Dines, Hansen, Jørgen Beck, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 2023, In: Journal of Instrumentation. 18, 61 p., T11004.

    Research output: Contribution to journalJournal articleResearchpeer-review

  14. Published

    Search for pair-production of vector-like quarks in pp collision events at √s=13 TeV with at least one leptonically decaying Z boson and a third-generation quark with the ATLAS detector

    Aad, G., Abbott, B., Abbott, D., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Dam, Mogens, Camplani, Alessandra, Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, Jørn Dines, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 10 Aug 2023, In: Physics Letters B. 843, 25 p., 138019.

    Research output: Contribution to journalJournal articleResearchpeer-review

  15. Published

    New techniques for jet calibration with the ATLAS detector

    Aad, G., Abbott, B., Abeling, K., Abicht, N. J., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Dam, Mogens, Camplani, Alessandra, Hansen, Jørn Dines, Hansen, Jørgen Beck, Hansen, Peter Henrik, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 29 Aug 2023, In: European Physical Journal C. 83, 8, 41 p., 761.

    Research output: Contribution to journalJournal articleResearchpeer-review

  16. Published

    Search for a new scalar resonance in flavour-changing neutral-current top-quark decays t → qX (q = u, c), with X → b(b)over-bar, in proton-proton collisions at √s=13 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abbott, D. C., Abeling, K., Abidi, S. H., Aboulhosn, J. A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Dam, Mogens, Camplani, Alessandra, Hansen, Jørgen Beck, Hansen, Jørn Dines, Hansen, Peter Henrik, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 26 Jul 2023, In: Journal of High Energy Physics (Online). 2023, 07, 51 p., 199.

    Research output: Contribution to journalJournal articleResearchpeer-review

  17. Published

    Evidence of off-shell Higgs boson production from ZZ leptonic decay channels and constraints on its total width with the ATLAS detector

    Aad, G., Abbott, B., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Acharya, B. S., Dam, Mogens, Camplani, Alessandra, Hansen, Peter Henrik, Hansen, Jørn Dines, Hansen, Jørgen Beck, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 5 Oct 2023, In: Physics Letters B. 846, 29 p., 138223.

    Research output: Contribution to journalJournal articleResearchpeer-review

  18. Published

    Observation of four-top-quark production in the multilepton final state with the ATLAS detector

    Aad, G., Abbott, B., Abeling, K., Abicht, N. J., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Acharya, B. S., Dam, M., Camplani, A., Hansen, J. B., Hansen, P. H., Hansen, J. D., Ignazzi, R., Petersen, T. C., Wiglesworth, G., Xella, S. & 1 others, ATLAS Collaboration, A. C., 12 Jun 2023, In: European Physical Journal C. 83, 6, 35 p., 496.

    Research output: Contribution to journalJournal articleResearchpeer-review

  19. Published

    Measurement of the production of a W boson in association with a charmed hadron in pp collisions at √s=13  TeV with the ATLAS detector

    Aad, G., Abbott, B., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Acharya, B. S., Dam, Mogens, Camplani, Alessandra, Hansen, Peter Henrik, Hansen, Jørn Dines, Hansen, Jørgen Beck, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 14 Aug 2023, In: Physical Review D. 108, 3, 54 p., 032012.

    Research output: Contribution to journalJournal articleResearchpeer-review

  20. Published

    Determination of the strong coupling constant from transverse energy-energy correlations in multijet events at √s= 13 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Abusleme Hoffman, A. C., Dam, Mogens, Camplani, Alessandra, Hansen, Jørn Dines, Hansen, Peter Henrik, Hansen, Jørgen Beck, Ignazzi, R., Wiglesworth, Graig, Petersen, Troels Christian, Xella, Stefania & ATLAS Collaboration, A. C., 11 Jul 2023, In: Journal of High Energy Physics. 2023, 07, 54 p., 85.

    Research output: Contribution to journalJournal articleResearchpeer-review

  21. Published

    Measurement of single top-quark production in association with a W boson in the single-lepton channel at root s=8 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abbott, D., Abud, A., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S. A., Abraham, N., Abramowicz, H., Camplani, Alessandra, Dam, Mogens, Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, Jørn Dines, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 10 Aug 2021, In: European Physical Journal C. 81, 8, 29 p., 720.

    Research output: Contribution to journalJournal articleResearchpeer-review

  22. Published

    Search for R-parity-violating supersymmetry in a final state containing leptons and many jets with the ATLAS experiment using root s=13 TeV proton-proton collision data

    Aad, G., Abbott, B., Abbott, D., Abud, A., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., Abramowicz, H., Abreu, H., Abulaiti, Y., Camplani, Alessandra, Dam, Mogens, Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, Jørn Dines, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 17 Nov 2021, In: European Physical Journal C. 81, 11, 39 p., 1023.

    Research output: Contribution to journalJournal articleResearchpeer-review

  23. Published

    Search for doubly and singly charged Higgs bosons decaying into vector bosons in multi-lepton final states with the ATLAS detector using proton-proton collisions at root s=13 TeV

    Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S. A., Abraham, N., Abramowicz, H., Camplani, Alessandra, Dam, Mogens, Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, Jørn Dines, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 24 Jun 2021, In: Journal of High Energy Physics (Online). 2021, 6, 54 p., 146.

    Research output: Contribution to journalJournal articleResearchpeer-review

  24. Published

    Search for dark matter produced in association with a single top quark in root s=13 TeV pp collisions with the ATLAS detector

    Aad, G., Abbott, B., Abbott, D., Abud, A., Abeling, K., Abhayasinghe, D., Abidi, S. H., AbouZeid, O. S. A., Abraham, N., Abramowicz, H., Camplani, Alessandra, Dam, Mogens, Hansen, Jørgen Beck, Hansen, Jørn Dines, Hansen, Peter Henrik, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 19 Oct 2021, In: European Physical Journal C. 81, 10, 37 p., 860.

    Research output: Contribution to journalJournal articleResearchpeer-review

  25. Published

    Search for dark matter produced in association with a Standard Model Higgs boson decaying into b-quarks using the full Run 2 dataset from the ATLAS detector

    Aad, G., Abbott, B., Abbott, D., Abud, A., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S. A., Abramowicz, H., Abreu, H., Camplani, Alessandra, Dam, Mogens, Ignazzi, R., Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, Jørn Dines, Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 26 Nov 2021, In: Journal of High Energy Physics (Online). 2021, 11, 50 p., 209.

    Research output: Contribution to journalJournal articleResearchpeer-review

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