Stefania Xella

Stefania Xella

Associate Professor, Guest Researcher

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    ORCID: 0000-0002-0988-1655

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    1. Published

      Performance and calibration of quark/gluon-jet taggers using 140 fb-1 of 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., 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 Collaboration, A. C., 1 Feb 2024, In: Chinese Physics C. 48, 2, 26 p., 023001.

      Research output: Contribution to journal › Journal article › Research › peer-review

    2. Published

      Optimisation of large-radius jet reconstruction for the ATLAS detector in 13 TeV proton–proton collisions

      Aad, G., Abbott, B., Abbott, DC., Abud, A. A., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Alonso Diaz, A., Camplani, A., Dam, M., Galster, G. A. G. K., hqz214, H., Hansen, J. B., Hansen, J. D., Hansen, P. H., Ignazzi, R. & 6 others, Petersen, Troels Christian, Monk, J. W., Stark, S. H., Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 19 Apr 2021, In: European Physical Journal C. 81, 47 p., 334.

      Research output: Contribution to journal › Journal article › Research › peer-review

    3. Published

      Operation of the ATLAS trigger system in Run 2

      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., Abreu, R., Abulaiti, Y., Camplani, A., Dam, M., Galster, G. A. G. K., Hansen, J. D., Hansen, J. B., Hansen, P. H., Ignazzi, R. & 7 others, Monk, J. W., hqz214, H., Wiglesworth, Graig, Stark, S. H., Petersen, Troels Christian, Xella, Stefania & ATLAS Collaboration, A. C., 10 Feb 2020, In: Journal of Instrumentation. 15, 60 p., P10004.

      Research output: Contribution to journal › Journal article › Research › peer-review

    4. Published

      Operation and performance of the ATLAS semiconductor tracker in LHC Run 2

      Aad, G., Abbott, B., Abbott, D., Abud, A., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Dam, Mogens, Camplani, Alessandra, Hansen, Jørn Dines, Hansen, Peter Henrik, Hansen, Jørgen Beck, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 1 Jan 2022, In: Journal of Instrumentation. 17, 1, 56 p., P01013.

      Research output: Contribution to journal › Journal article › Research › peer-review

    5. Published

      Operation and performance of the ATLAS semiconductor tracker

      Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., Abi, B., Abolins, M., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Jørgensen, M. D., Petersen, T. C., Thomsen, L. A., Alonso Diaz, A., Galster, G. A. G. K., Mehlhase, S., Pingel, A. M. & 4 others, Løvschall-Jensen, A. E., Monk, J. W., Pedersen, L. E. & Wiglesworth, Graig, 29 Apr 2014, In: Journal of Instrumentation. 9, 80 p., P08009.

      Research output: Contribution to journal › Journal article › Research › peer-review

    6. Published

      Operation and performance of the ATLAS Tile Calorimeter in Run 1

      Aaboud, M., Aad, G., Abbott, B., Abdallah, J., 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. & 20 others, Affolder, A. A., Afik, Y., Agheorghiesei, C., Aguilar-Saavedra, J. A., Ahmadov, F., Alonso Diaz, A., Bajic, M., Besjes, G., de Almeida Dias, F., Dam, Mogens, Galster, G. A. G. K., Hansen, Jørn Dines, Hansen, Peter Henrik, Hansen, Jørgen Beck, Monk, J. W., hqz214, H., Petersen, Troels Christian, Stark, S. H., Wiglesworth, Graig & Xella, Stefania, 30 Nov 2018, In: European Physical Journal C. 78, 12, 48 p., 987.

      Research output: Contribution to journal › Journal article › Research › peer-review

    7. Published

      Observation of top-quark pair production in association with a photon and measurement of the t(t)over-bar gamma production cross section in pp collisions at root s=7 TeV using the ATLAS detector

      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., 28 Apr 2015, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 91, 7, 072007.

      Research output: Contribution to journal › Journal article › Research › peer-review

    8. Published

      Observation of the γγ → ττ Process in Pb plus Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector

      Aad, G., Abbott, B., Abbott, D., Abud, A., Abeling, K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Dam, Mogens, Camplani, Alessandra, Hansen, Peter Henrik, Hansen, Jørgen Beck, Hansen, Jørn Dines, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 12 Oct 2023, In: Physical Review Letters. 131, 15, 23 p., 151802.

      Research output: Contribution to journal › Letter › Research › peer-review

    9. Published

      Observation of the associated production of a top quark and a Z boson 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., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Alonso Diaz, A., hqz214, H., Bajic, M., 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., Stark, S. H., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 20 Jul 2020, In: Journal of High Energy Physics (Online). 2020, 7, 46 p., 124.

      Research output: Contribution to journal › Journal article › Research › peer-review

    10. Published

      Observation of spin correlation in ttbar events from pp collisions at sqrt(s) = 7 TeV using the ATLAS detector

      Aad, G., Boelaert, N. M. P., Dam, Mogens, Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, Jørn Dines, Hansen, John Renner, Heisterkamp, S. J. F., Jørgensen, M. D., Klinkby, E. B., Nilsson, B. S., Mehlhase, S., Petersen, Troels Christian & Xella, Stefania, 24 May 2012, In: Physical Review Letters. 108, 21, p. 212001 19 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    11. Published

      Observation of photon-induced W+W- production in pp collisions at √s ​=13 TeV using the ATLAS detector

      Aad, G., Abbott, B., Abud, AA., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Alonso Diaz, A., Camplani, A., Dam, M., Galster, G. A. G. K., hqz214, H., Hansen, J. D., Hansen, J. B., Hansen, P. H., Ignazzi, R. & 6 others, Monk, J. W., Stark, S. H., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 4 Mar 2021, In: Physics Letters B. 816, 24 p., 136190.

      Research output: Contribution to journal › Journal article › Research › peer-review

    12. Published

      Observation of gauge boson joint-polarisation states in W±Z production from 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, Peter Henrik, Hansen, Jørgen Beck, Hansen, Jørn Dines, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 10 Aug 2023, In: Physics Letters B. 843, 27 p., 137895.

      Research output: Contribution to journal › Journal article › Research › peer-review

    13. 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 journal › Journal article › Research › peer-review

    14. Published

      Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 TeV with the ATLAS detector

      Aad, G., Abbott, B., Abbott, D., Abud, A., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Dam, Mogens, Camplani, Alessandra, Ignazzi, R., Hansen, Peter Henrik, Hansen, Jørn Dines, Hansen, Jørgen Beck, Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 3 Feb 2022, In: European Physical Journal C. 82, 2, 41 p., 105.

      Research output: Contribution to journal › Journal article › Research › peer-review

    15. Published

      Observation of electroweak production of two jets and a Z-boson pair

      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., Dam, M., Camplani, A., Hansen, J. D., Hansen, J. B., Hansen, P. H., Ignazzi, R., Wiglesworth, G., Petersen, T. C., Xella, S. & 1 others, ATLAS, A., 9 Feb 2023, In: Nature Physics. 19, p. 237-253 18 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    16. Published

      Observation of electroweak W(+/-)Z boson pair production in association with two jets in pp collisions at root s=13 TeV with the ATLAS detector

      ATLAS, A., 10 Jun 2019, In: Physics Letters B. 793, p. 469-492 24 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    17. Published

      Observation of an Excited B± Meson State with the ATLAS Detector

      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., Løvschall-Jensen, A. E., Alonso Diaz, A., Monk, J. W. & 3 others, Pedersen, L. E., Galster, G. A. G. K. & Wiglesworth, Graig, 3 Jul 2014, In: Physical Review Letters. 113, 212004.

      Research output: Contribution to journal › Journal article › Research › peer-review

    18. Published

      Observation of an Excess of Dicharmonium Events in the Four-Muon Final State 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, Ignazzi, R., Hansen, Peter Henrik, Hansen, Jørn Dines, Hansen, Jørgen Beck, Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS, A., 2023, In: Physical Review Letters. 131, 15, 22 p., 151902.

      Research output: Contribution to journal › Letter › Research › peer-review

    19. Published

      Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC

      Aad, G., Dam, Mogens, Hansen, Jørn Dines, Hansen, Jørgen Beck, Hansen, John Renner, Hansen, Peter Henrik, Klinkby, E. B., Boelaert, N. M. P., Jørgensen, M. D., Petersen, Troels Christian, Nilsson, B. S., Xella, Stefania, Heisterkamp, S. J. F., Mehlhase, S., Løvschall-Jensen, A. E. & ATLAS, A., 17 Sep 2012, In: Physics Letters B. 716, 1, p. 1-29 29 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    20. Published

      Observation of a New ¿b State in Radiative Transitions to ¿(1S) and ¿(2S) at ATLAS

      Aad, G., Dam, Mogens, Boelaert, N. M. P., Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, John Renner, Hansen, Jørn Dines, Heisterkamp, S. J. F., Jørgensen, M. D., Klinkby, E. B., Mehlhase, S., Nilsson, B. S., Petersen, Troels Christian, Løvschall-Jensen, A. E. & Xella, Stefania, 9 Apr 2012, In: Physical Review Letters. 108, 15, p. 152001

      Research output: Contribution to journal › Journal article › Research › peer-review

    21. Published

      Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at sqrt(S(NN))= 2.76 TeV with the ATLAS Detector at the LHC

      Aad...[et al.], G., Dam, Mogens, Hansen, John Renner, Hansen, Jørgen Beck, Hansen, Jørn Dines, Hansen, Peter Henrik, Jørgensen, M. D., Klinkby, E. B. & Xella, Stefania, 13 Dec 2010, In: Physical Review Letters. 105, 25, p. 252303 18 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    22. Published

      Observation of Wγγ triboson production in proton-proton 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., 24 Jan 2024, In: Physics Letters B. 848, 24 p., 138400.

      Research output: Contribution to journal › Journal article › Research › peer-review

    23. Published

      Observation of WZγ Production in pp Collisions at √s=13  TeV with the ATLAS Detector

      Aad, G., Abbott, B., Abeling, K., Abicht, N. J., Abidi, S. H., Aboulhosn, J. 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 Collaboration, A. C., 12 Jan 2024, In: Physical Review Letters. 132, 2, 21 p., 021802.

      Research output: Contribution to journal › Letter › Research › peer-review

    24. Published

      Observation of WWW Production in pp Collisions at √s = 13 TeV with the ATLAS Detector

      Aad, G., Abbott, D., Abud, A., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abulaiti, Y., Dam, Mogens, Camplani, Alessandra, Hansen, Jørn Dines, Hansen, Peter Henrik, Hansen, Jørgen Beck, Ignazzi, R., Petersen, Troels Christian, Wiglesworth, Graig, Xella, Stefania & ATLAS Collaboration, A. C., 4 Aug 2022, In: Physical Review Letters. 129, 20 p., 061803.

      Research output: Contribution to journal › Letter › Research › peer-review

    25. Published

      Observation of Spin Correlation in t(t)over-bar Events from pp Collisions at root s=7 TeV Using the ATLAS Detector

      Aad, G., Abbott, B., Dam, Mogens, Hansen, Jørgen Beck, Hansen, Peter Henrik, Hansen, John Renner, Hansen, Jørn Dines, Heisterkamp, S. J. F., Jørgensen, M. D., Løvschall-Jensen, A. E., Klinkby, E. B., Boelaert, N. M. P., Mehlhase, S., Nilsson, B. S., Petersen, Troels Christian & Xella, Stefania, 24 May 2012, In: Physical Review Letters. 108, 21, p. 212001

      Research output: Contribution to journal › Journal article › Research › peer-review

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