Stefania Xella

Stefania Xella

Associate Professor

 Personal Information

Name:         Stefania Xella
 Title:            Associate professor (since 2010)
 Address:     Niels Bohr Institute (NBI), Copenhagen University,
                     Blegdamsvej 17, DK-2100, Copenhagen, DK
Email:          xella@nbi.dk
Status:        married, two children (18 and 15). Maternity leave 12
                    months

Current research interests
  High energy experimental particle physics, in particular
• ATLAS Trigger system, operation and coordination.
• ATLAS data analysis: Beyond Standard Model effects in lepton
  flavour physics; Higgs measurements.
• Technology development for trigger systems, and production of silicon detectors, for the ATLAS experiment at the high luminosity LHC upgrade at CERN
• Design of a new facility: the SHIP experiment at CERN

Significant research appointments

2006 - present : member of the ATLAS experiment at the Large
                            Hadron Collider (LHC), CERN
2013 - present : member of the SHIP experiment at CERN, and the SHIP
                            Institute board
2011 - present : member of the ATLAS trigger and data acquisition Institute
                            Board
2010 - 2019     : member of the Discovery board (DNF Centre of
                           Excellence in Particle Physics)

2017 - 2019 : ATLAS trigger deputy coordinator (2017-18) and coordinator
(2018-19) (project with ~ 200 people). Member of the ATLAS trigger
management group,and ATLAS Executive Board.
2015 - 2016 : ATLAS trigger menu coordinator (project with ~ 50 people).
                        Member of the ATLAS trigger management group.
2014 - 2015 : ATLAS trigger release coordinator. Member of the ATLAS trigger
                       steering group.
2015             :  Nominated as chair of the ATLAS trigger and data acquisition
                        Institute Board
2011 - 2013 : ATLAS tau reconstruction group (project with ~ 50 people)
                       coordinator. Member of Physics Coordination.
2012 - 2013 : Member of the ATLAS Collaboration Board Chair Advisory group.
2008 - 2011 : ATLAS tau trigger coordinator (project with ~ 20 people).
1999 - 2000 : BaBar Run control coordinator

 Earlier Research Training

2006 - 2010 : Postdoc at the Niels Bohr Institute, DK. ATLAS experiment.
2003 - 2006 : Postdoc at the University of Zurich, CH. H1 experiment.
1999 - 2003 : Postdoc at the Rutherford Appleton Laboratory, UK. Babar
                     experiment.
1999 - 2000 : Long Term stay at Stanford Linear Accelerator Center (SLAC),
                      USA
1996 - 1999 : PhD in Physics. Niels Bohr Institute, DK.
1989 - 1995 : Master in Physics. 110/110 cum laude. University of Bologna, IT.

Physics analysis interests, selected recent efforts 

• Search for heavy neutral leptons in decays of W bosons produced in 13 TeV pp collisions
using prompt and displaced signatures with the ATLAS detector - arXiv:1905.09787
• Search for the lepton-flavor-violating decay of the Z boson into a tau-lepton and a light
lepton with the ATLAS detector - Phys.Rev. D98 (2018) 092010
• Evidence for Higgs decay into tau leptons - JHEP 1504 (2015) 117.

Scientific discoveries I contributed to

• Measurement of CP violation in B decays with the BaBar experiment:
 Phys.Rev.Lett. 87 (2001) 091801, 800+ citations , Phys.Rev.Lett. 89 (2002) 201802, 500+ citations.
• Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector :JHEP 1504 (2015) 117, 200+ citations.

Research review work
2017 - present : Review research proposals for the FCT 2017- SR&TD Project Grants, Science
and Technology Foundation, Portugal (~ review 27 proposals)
2017 - present : Referee for Physics Letter B
2017 - present : Exotics theory contact for Heavy Neutral Lepton searches
2010 - present : Member of several Editorial Boards within the ATLAS experiment
2010 - present : Member of PhD committees in Sweden, Holland, Germany, Denmark, Italy

Publication profile
h-index 154 (https://inspirenet.hep, “find a xella and TC P”), 1010 papers
published, average citations per paper: 115.

Attracted funding
2018 - 2019 : CERN Scientific Associate.
2017 - 2018 : Carlsberg grant for research stay abroad (Melbourne Univ.),
                     11 kEuros.
2014 - 2018 : Research and Innovation fund, YDUN grant, 810 kEuros. One
                       postdoc and two PhD students (co-supported by NBI) hired.
2009 - 2013 : Research and Innovation fund, Women head of research grant,
                        810 kEuros.One postdoc and one PhD student hired.
2008 - 2009 : Copenhagen University FREIA grant. 400 kEuros. Own salary and
                       one PhD student hired.
2005 - 2006 : Swiss National Foundation, Marie Heim Vogtlin, fellowship.
                        Own salary.

Recent conference contributions
DISCRETE18 6th Symposium on Prospects in the Physics of Discrete
Symmetries Searches for new phenomena with the ATLAS detector

WIN2017 The 26th International Workshop on Weak Interactions and
Neutrinos Charged Lepton Flavour Violation/Lepton Number Violation
searches and studies with the ATLAS experiment

CosPA (2014) 10th Conference in the Symposium on Cosmology and Particle
Astrophysics Overview of Higgs properties at ATLAS

Charged-2012 Prospects for Charged Higgs Discovery at Colliders
Physics object reconstruction in ATLAS: tau, b-jets, Etmiss, etc.

Teaching
Yearly courses : 2 bachelor level courses (Electromagnetism 1, 150 students.
Introduction to Nuclear and Particle Physics, 30 students).
Supervision : 6 PhD students (3 female/F, 3 male/M) , 10 master students
(3 F, 7 M), 7 bachelor students (2 F, 5 M) - since 2008.

Lanuage skills
italian (mother tongue)
english (very good)
danish (good)
german (basic)

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