Stefania Xella

Stefania Xella

Associate Professor, Guest Researcher


  1. Published

    Searches for lepton-flavour-violating decays of the Higgs boson 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., Abreu, H., Abulaiti, Y., Alonso Diaz, A., Bajic, M., hqz214, H., Camplani, A., Dam, M., Galster, G. A. G. K., Hansen, P. H., Hansen, J. D. & 8 others, Hansen, Jørgen Beck, Ignazzi, R., Monk, J. W., Petersen, Troels Christian, Stark, S. H., Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 10 Jan 2020, In: Physics Letters B. 800, 23 p., 135069.

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Published

    Searches for heavy long-lived sleptons and R-hadrons with the ATLAS detector in pp collisions at root s=7 TeV

    Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Khalek, S. A., Dam, Mogens, Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, John Renner, Hansen, Jørn Dines, Heisterkamp, S. J. F., Jørgensen, M. D., Klinkby, E. B., Løvschall-Jensen, A. E., Boelaert, N. M. P., Mehlhase, S., Nilsson, B. S., Petersen, Troels Christian & Xella, Stefania, 26 Mar 2013, In: Physics Letters B. 720, 4-5, p. 277-308

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Published

    Searches for heavy long-lived charged particles with the ATLAS detector in proton-proton collisions at √s = 8 TeV

    Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., Abi, B., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Mehlhase, S., Jørgensen, M. D., Pingel, A. M., Galster, G. A. G. K., Løvschall-Jensen, A. E., Alonso Diaz, A. & 3 others, Monk, J. W., Pedersen, L. E. & Wiglesworth, Graig, 25 Nov 2014, In: Journal of High Energy Physics (Online). 2014, 068, p. 01

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Published

    Searches for heavy long-lived charged particles with the ATLAS detector in proton-proton collisions at root s=8 TeV

    Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., Abi, B., Abolins, M., AbouZeid, O. S., Abramowicz, H., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Mehlhase, S., Jørgensen, M. D., Pingel, A. M. & 6 others, Løvschall-Jensen, A. E., Alonso Diaz, A., Monk, J. W., Pedersen, L. E., Wiglesworth, Graig & Galster, G. A. G. K., 14 Jan 2015, In: Journal of High Energy Physics (Online). 2015, 1, 068.

    Research output: Contribution to journalJournal articleResearchpeer-review

  5. Published

    Searches for heavy diboson resonances in pp collisions at root S=13 TeV with the ATLAS detector

    Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., Aben, R., AbouZeid, O. S., Abraham, NL., Abramowicz, H., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Pingel, A. M., Løvschall-Jensen, A. E., Alonso Diaz, A. & 4 others, Monk, J. W., Pedersen, L. E., Wiglesworth, Graig & Galster, G. A. G. K., 29 Sep 2016, In: Journal of High Energy Physics (Online). 2016, 9, 173.

    Research output: Contribution to journalJournal articleResearchpeer-review

  6. Published

    Searches for heavy ZZ and ZW resonances in the llqq and vvqq final states in pp collisions at root s=13 TeV with the ATLAS detector

    Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abidi, S. H., Abouzeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abreu, R., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adye, T., Affolder, A. A., Afik, Y. & 19 others, Agatonovic-Jovin, T., Agheorghiesei, C., Aguilar-Saavedra, J. A., Ahlen, S. P., Besjes, G., Alonso Diaz, A., Bajic, M., de Almeida Dias, F., Galster, G. A. G. K., Hansen, Peter Henrik, Dam, Mogens, Monk, J. W., Thiele, F. A. J., Hansen, Jørn Dines, Stark, S. H., Hansen, Jørgen Beck, Petersen, Troels Christian, Wiglesworth, Graig & Xella, Stefania, 5 Mar 2018, In: Journal of High Energy Physics. 2018, 3, 53 p., 009.

    Research output: Contribution to journalJournal articleResearchpeer-review

  7. Published

    Searches for exclusive Higgs and Z boson decays into a vector quarkonium state and a photon using 139 fb-1 of ATLAS √s = 13 TeV proton–proton collision data

    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., 5 Sep 2023, In: European Physical Journal C. 83, 9, 33 p., 781.

    Research output: Contribution to journalJournal articleResearchpeer-review

  8. Published

    Searches for exclusive Higgs and Z boson decays into J/psi gamma, psi (2S) gamma, and Upsilon(nS) gamma 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., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adiguzel, A., Adye, T., Affolder, A. A. & 18 others, Afik, Y., Agheorghiesei, C., Aguilar-Saavedra, J. A., Alonso Diaz, A., Bajic, M., Besjes, G., Dam, Mogens, de Almeida Dias, F., Galster, G. A. G. K., Hansen, Peter Henrik, Hansen, Jørn Dines, Hansen, Jørgen Beck, Monk, J. W., Petersen, Troels Christian, Stark, S. H., Thiele, F. A. J., Wiglesworth, Graig & Xella, Stefania, 10 Nov 2018, In: Physics Letters B. 786, p. 134-155 22 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  9. Published

    Searches for electroweak production of supersymmetric particles with compressed mass spectra 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., Abreu, H., Abulaiti, Y., Acharya, B. S., Alonso Diaz, A., hqz214, H., Camplani, A., Dam, M., Galster, G. A. G. K., Hansen, J. B., Hansen, J. D. & 8 others, Hansen, Peter Henrik, Ignazzi, R., Monk, J. W., Petersen, Troels Christian, Stark, S. H., Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 11 Mar 2020, In: Physical Review D. 101, 5, 46 p., 052005.

    Research output: Contribution to journalJournal articleResearchpeer-review

  10. Published

    Searches for Higgs boson pair production in the hh -> bb tau tau, gamma gamma WW*, gamma gamma bb, bbbb channels with the ATLAS detector

    Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M., AbouZeid, O. S., Abramowicz, H., Abreu, H., Abreu, R., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Mehlhase, S., Jørgensen, M. D., Pingel, A. M. & 6 others, Løvschall-Jensen, A. E., Alonso Diaz, A., Monk, J. W., Pedersen, L. E., Wiglesworth, Graig & Galster, G. A. G. K., 5 Nov 2015, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 92, 9, 092004.

    Research output: Contribution to journalJournal articleResearchpeer-review

  11. Published

    Search in diphoton and dielectron final states for displaced production of Higgs or Z bosons with the ATLAS detector in √s=13  TeV pp collisions

    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. B., Hansen, J. D., Hansen, P. H., Ignazzi, R., Petersen, T. C., Wiglesworth, G., Xella, S. & 1 others, ATLAS, A., 19 Jul 2023, In: Physical Review D. 108, 1, 32 p., 012012.

    Research output: Contribution to journalJournal articleResearchpeer-review

  12. Published

    Search for vectorlike B quarks in events with one isolated lepton, missing transverse momentum, and jets at root s=8 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M., AbouZeid, O. S., Abramowicz, H., Abreu, H., Abreu, R., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Mehlhase, S., Jørgensen, M. D., Pingel, A. M. & 6 others, Løvschall-Jensen, A. E., Alonso Diaz, A., Monk, J. W., Pedersen, L. E., Wiglesworth, Graig & Galster, G. A. G. K., 19 Jun 2015, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 91, 11, 112011.

    Research output: Contribution to journalJournal articleResearchpeer-review

  13. Published

    Search for vector-boson resonances decaying to a top quark and bottom quark in the lepton plus jets final state 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., Acharya, B. S., Adachi, J., Adamczyk, L., Adelman, J., Adersberger, M., Adiguzel, A., Adye, T., Affolder, A. A. & 25 others, Afik, Y., Agheorghiesei, C., Aguilar-Saavedra, J. A., Ahmadov, F., Aielli, G., Akatsuka, S., Akesson, T. P. A., Akilli, E., Akimov, A. V., Hansen, Jørgen Beck, Hansen, Peter Henrik, Alonso Diaz, A., Dam, Mogens, Besjes, G., Wiglesworth, Graig, Monk, J. W., Bajic, M., Petersen, Troels Christian, Hansen, Jørn Dines, hqz214, H., Stark, S. H., Galster, G. A. G. K., de Almeida Dias, F., Xella, Stefania & ATLAS, A., 10 Jan 2019, In: Physics Letters B. 788, p. 347-370 24 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  14. Published

    Search for vector-boson resonances decaying into a top quark and a bottom quark using pp collisions at √s=13 TeV 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, Peter Henrik, Hansen, Jørn Dines, Hansen, Jørgen Beck, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 12 Dec 2024, In: Journal of High Energy Physics (Online). 2023, 12, 63 p., 73.

    Research output: Contribution to journalJournal articleResearchpeer-review

  15. Published

    Search for type-III seesaw heavy leptons in pp collisions at root s=8 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M., AbouZeid, O. S., Abramowicz, H., Abreu, H., Abreu, R., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Mehlhase, S., Jørgensen, M. D., Pingel, A. M. & 6 others, Løvschall-Jensen, A. E., Alonso Diaz, A., Monk, J. W., Pedersen, L. E., Wiglesworth, Graig & Galster, G. A. G. K., 3 Aug 2015, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 92, 3, 032001.

    Research output: Contribution to journalJournal articleResearchpeer-review

  16. Published

    Search for type-III seesaw heavy leptons in leptonic final states in pp collisions at root s=13 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abbott, DC., Abud, AA., Abeling, K., Abhayasinghe, DK., Abidi, S. H., Abramowicz, H., Abreu, H., Abulaiti, Y., Dam, M., Camplani, A., Petersen, T. C., Hansen, P. H., Hansen, J. D., Hansen, J. B., Ignazzi, R., Wiglesworth, G., Petersen, T. C., Xella, S. & 1 others, ATLAS, A., 3 Nov 2022, In: European Physical Journal C. 82, 11, 30 p., 988.

    Research output: Contribution to journalJournal articleResearchpeer-review

  17. Published

    Search for type-III seesaw heavy leptons in dilepton final states in pp collisions at root s=13TeV with the ATLAS detector

    Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Alonso Diaz, A., Bajic, M., Camplani, A., Dam, M., Ignazzi, R., Hansen, J. D., Hansen, J. B., Hansen, P. H., Petersen, T. C., Xella, S. & 7 others, Wiglesworth, Graig, Galster, G. A. G. K., Stark, S. H., hqz214, H., Monk, J. W., de Almeida Dias, F. & ATLAS Collaboration, A. C., 5 Mar 2021, In: European Physical Journal C. 81, 3, 30 p., 218.

    Research output: Contribution to journalJournal articleResearchpeer-review

  18. Published

    Search for tt‾ resonances in fully hadronic final states in pp collisions at √s = 13 TeV with the ATLAS detector

    Aad, G., Abbott, B., Abbott, DC., Abud, AA., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Achkar, B., Adam, L., Adamczyk, L., Adelman, J., Alonso Diaz, A., Bajic, M., Camplani, A. & 13 others, Dam, Mogens, Galster, G. A. G. K., hqz214, H., Hansen, Jørgen Beck, Hansen, Jørn Dines, Hansen, Peter Henrik, Ignazzi, R., Petersen, Troels Christian, Stark, S. H., Monk, J. W., Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 9 Oct 2020, In: The Journal of High Energy Physics. 2020, 10, 40 p., 061.

    Research output: Contribution to journalJournal articleResearchpeer-review

  19. Published

    Search for tt-H/A → tt-tt- production in the multilepton final state in proton–proton 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, Jørgen Beck, Hansen, Peter Henrik, Hansen, Jørn Dines, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 26 Jul 2023, In: Journal of High Energy Physics (Online). 2023, 07, 53 p., 203.

    Research output: Contribution to journalJournal articleResearchpeer-review

  20. Published

    Search for trilepton resonances from chargino and neutralino pair production in root s=13 TeV pp collisions 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, Peter Henrik, Hansen, Jørn Dines, Hansen, Jørgen Beck, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 7 Jun 2021, In: Physical Review D. 103, 11, 37 p., 112003.

    Research output: Contribution to journalJournal articleResearchpeer-review

  21. Published

    Search for triboson (WWW -/+)-W-+/--W-+/- production in pp collisions at root s=8 TeV with the ATLAS detector

    Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., Aben, R., AbouZeid, O. S., Abraham, NL., Abramowicz, H., Abreu, H., Abreu, R., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adams, D. L., Adelman, J. P., Adomeit, S., Adye, T. & 17 others, Dam, Mogens, Hansen, Jørn Dines, Hansen, Jørgen Beck, Xella, Stefania, Hansen, Peter Henrik, Petersen, Troels Christian, Løvschall-Jensen, A. E., Alonso Diaz, A., Monk, J. W., Pedersen, L. E., Wiglesworth, Graig, Galster, G. A. G. K., Stark, S. H., Besjes, G., Thiele, F. A. J., de Almeida Dias, F. & Bajic, M., 2 Mar 2017, In: European Physical Journal C. 77, 3, 141.

    Research output: Contribution to journalJournal articleResearchpeer-review

  22. Published

    Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb-1 of root s=13 TeV pp collision data with the ATLAS detector

    Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abidi, S. H., Abouzeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abreu, R., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adye, T., Affolder, A. A., Afik, Y. & 18 others, Agatonovic-Jovin, T., Agheorghiesei, C., Ahlen, S. P., Alonso Diaz, A., Besjes, G., Bajic, M., Dam, Mogens, de Almeida Dias, F., Galster, G. A. G. K., Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, Jørn Dines, Monk, J. W., Thiele, F. A. J., Stark, S. H., Petersen, Troels Christian, Wiglesworth, Graig & Xella, Stefania, 21 Jun 2018, In: Journal of High Energy Physics. 2018, 6, 96 p., 108.

    Research output: Contribution to journalJournal articleResearchpeer-review

  23. Published

    Search for top-quark decays t -> Hq with 36 fb(-1) of pp collision data 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., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adiguzel, A., Adye, T., Affolder, A. A. & 24 others, Afik, Y., Agheorghiesei, C., Aguilar-Saavedra, J. A., Ahmadov, F., Aielli, G., Akatsuka, S., Akesson, T. P. A., Akilli, E., de Almeida Dias, F., Besjes, G., Bajic, M., Dam, Mogens, Galster, G. A. G. K., Alonso Diaz, A., Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, Jørn Dines, Monk, J. W., hqz214, H., Stark, S. H., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 21 May 2019, In: The Journal of High Energy Physics. 2019, 5, 67 p., 123.

    Research output: Contribution to journalJournal articleResearchpeer-review

  24. Published

    Search for top-philic heavy resonances in pp collisions at√ s=13 TeV 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, P. H., Hansen, J. D., Hansen, J. B., Ignazzi, R., Petersen, T. C., Wiglesworth, G., Xella, S. & 1 others, ATLAS Collaboration, A. C., 15 Feb 2024, In: European Physical Journal C. 84, 2, 32 p., 157.

    Research output: Contribution to journalJournal articleResearchpeer-review

  25. Published

    Search for top squarks in final states with one isolated lepton, jets, and missing transverse momentum in root s=13 TeV pp collisions with the ATLAS detector

    Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., AbouZeid, O. S., Abraham, NL., Abramowicz, H., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Pingel, A. M., Løvschall-Jensen, A. E., Alonso Diaz, A., Monk, J. W., Pedersen, L. E. & 2 others, Wiglesworth, Graig & Galster, G. A. G. K., 19 Sep 2016, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 94, 5, 052009.

    Research output: Contribution to journalJournal articleResearchpeer-review

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