Lunedi' alle 13:00 alla sede di Ingegneria a Santa Marta, aula 60 (se libera)

Mercoledi' alle 9:30 al dipartimento di Fisica a Sesto Fiorentino

Un qualsiasi altro giorno su appuntamento.

Ricevimento per appuntamento: ora e data da concordare via email

Personal data

Name: Giuseppe Ruggiero

Email address: giuseppe.ruggiero@unifi.it, giuseppe.ruggiero@cern.ch

Languages spoken

• Italian, mother-tongue
• English, very good written and oral
• French, good

Education

• PhD in physics, University of Firenze (IT), thesis: “Measurement of the charge asymmetry in the K_e3 decays of K-long using the NA48 detector”, supervisor Prof. E. Iacopini.
• Laurea Magister in Physics, University of Firenze (IT), thesis: “Misura di R_b a LEPII con il rivelatore L3”, supervisors D.ssa B. Monteleoni, Prof. A.M. Cartacci.

Professional experiences

• 2020 - present: Associate professor in physics, University of Firenze, Physics Department
• 2017 – 2020: Lecturer in physics and STFC Ernest Rutherford Fellow (ERF), Lancaster University (UK)
• 2016 – 2017: STFC ERF, Liverpool University (UK)
• 2011 – 2016: LD Research Staff, European Center for Nuclear Research (CERN), Geneva (CH)
• 2007 – 2011: Researcher TD in physics, Scuola Normale Superiore, Pisa
• 2005 – 2007: Research fellow, CERN, Geneva (CH)
• 2003 – 2005: Postdoctoral position University of Firenze

Awards

• 2015: STFC Ernest Rutherford Fellowship (UK)

Scientific Interests

My research interests focus on experimental particle physics, and in particular on experiments at the European Center of Nuclear Resarch (CERN) to study flavour physics with Kaons.

I was member of the L3 LEP experiment at CERN, of the NA48, NA48/1 and NA48/2 experiment at CERN, and presently I am Deputy Spokeperson of the NA62 experiment at CERN.

My principal achievement is the design, construction, commissioning, exploitation of the NA62 experiment at CERN, with which I obtained the first evidence of the ultra-rare decay of the K+ meson to a positive pion and a neutrino anti-neutrino pair.

My fields of expertise are data analysis, statistics, phenomenology of flavour physics, detectors for particle physics, algorithms for particle reconstruction.

I have been speaker at more than 40 international conferences and seminars.

Main scientific responsibilities

• Spokesperson of the NA62 experiment at CERN-SPS (October 2022 - Present)
• Deputy Spokesperson of the NA62 experiment at CERN-SPS (2019 - Settembre 2022)
• Physics coordinator of NA62 (2014 – 2019)
• Member of the steering committee of NA62 (2016 - present)
• Member of editorial board of NA62 (2014 - present)
• Group leader of the NA62 group of Lancaster University (2017 – 2020)
• Coordinator of the KPNN analysis group of NA62 (2015 - present)
• Referee of STFC projects
• Referee for JHEP and Physics Letter B journals

Selected conferences, seminars (most recent)

• "21st Conference in Flavour Physics and CP violation, FPCP 2023", Lyon, 29/0502923: Physics with Kaon at NA62
• “Particle Physics Seminar” University of Chicago (online), 17/05/2021: Kaon Physics at CERN with the NA62 Experiment
• “ICHEP Conference 2020", Prague (online) 28/07 – 6/08 2020, invited speaker of a review talk in plenary session: Rare Decays of K Mesons
• “KAON Conference 2019”, Perugia, 10-13/09 2019, invited speaker of the talk: Latest measurement of K+->pi+nunu with the NA62 experiment at CERN
• “CERN EP seminar”, 27/03 2018: K+->pi+nunu, First results from the NA62 experiment at CERN
• “EPS Conference 2017”, Venezia, 5-12/07 2017, speaker of an invited review talk in parallel session: Recent Results from Kaon Physics
• “KAON Conference 2016”, Birmingham, 14-17/09 2016, invited speaker of the talk: Status of the CERN NA62 Experiment.
• “51st Rencontres de Moriond EW 2016”, La Thuile, 12-19/03 2016, invited speaker of the talk: pi0form factor and K+->pi+nunu at NA62

Detailed Activity

I graduated in physics at the University of Firenze with a thesis on b-quark pair production in e+/e- collisions at the L3 experiment at CERN-LEP. I worked in L3 the first year of PhD at the University of Firenze. Then I joined the NA48 experiment at CERN-SPS, and I obtained the PhD with a study of CP violation in neutral kaon decays.

After completion of the PhD, I obtained a two years postdoc at the University of Firenze to study CP violation in charged kaons at the NA48/2 experiment (selected publication 20). Then I moved to CERN in 2005, as a research fellow. During the fellowship, I worked to a project of a new experiment capable to observe and study the ultra-rare decay of a K+ decaying to a charged pion and a neutrino pair (KPNN). I made the first design of this experiment. I focused my work on the tracking system of the apparatus made of silicon pixel detectors and straw tubes in vacuum, on the RICH detector for pion/muon separation, and on the electromagnetic calorimeter at liquid Krypton. I am one of the main authors of the proposal of this experiment, called P326 (report CERN-SPSC-2005-013).

In 2007, I moved to Scuola Normale Superiore, Pisa, as TD researcher in physics. I performed experimental studies of lepton flavor violation with the NA48/2 apparatus. I continued working to the P326 proposal that got the approval and took the name NA62 experiment. I wrote a reconstruction of the electromagnetic calorimeter; I developed a GEANT4-based simulation of the straw spectrometer; I participated to the laboratory activity to build an electronic board for trigger and data acquisition.

In 2010, I awarded a LD research staff position at CERN and I continued working in NA62. My principal area of activity were: development of a track reconstruction of the straw spectrometer; measurement of the 3D map of the dipole magnetic field of the NA62 spectrometer; definition of the final sensitivity studies of the NA62 apparatus under construction; study of the expected trigger rates. I analyzed the data of NA62 from 2012 to 2015 commissioning the readout of the electromagnetic calorimeter; the reconstructions of the straw chamber spectrometer and of the beam tracker. I was one of the editors of the technical design report of NA62, and one of the main authors of the article describing the NA62 detector.

In 2015, I awarded a 5 years STFC Ernest Rutherford Fellowship (ERF) in UK to work on NA62, and I joined Liverpool University in 2016. In 2017, I moved to Lancaster University, where I was appointed lecturer in physics with an indefinite contract position, while holding the STFC-ERF grant. In this period, I focused my activity on the 2016, 2017, 2018 data taking of NA62, and on the analysis of the data, with the goal to study the KPNN decay. As Physics Coordinator of NA62, I contributed to the definition of the strategy and goals of the NA62 data taking periods. I performed the KPNN analysis, in person and coordinating the KPNN analysis group. The analysis of data eventually has allowed NA62 to produce the first evidence ever of the KPNN decay with significance larger than 3 sigma, and to measure the 10^(-10) branching ratio with unprecedented 30% precision. I am the corresponding author of the all the publications about KPNN. I have presented the results on KPNN as invited speaker at a CERN seminar, at the KAON 2019 conference, and at a plenary session of the ICHEP 2020 conference, where I reviewed the worldwide experimental status and future prospects of rare kaon decays

In 2020, I have been appointed Associated Professor in experimental particle physics at the University of Firenze within the framework of the MIUR program of direct calls of scholars abroad.

In 2022 I was elected Spokesperson of the NA62 experiment. In this role I am responsible for all the avitivites of the experiment, I represent the experiment worldwide and in front of the financial bodies, and I interact with the CERN management to coordinate the activities of NA62 within the program of the CERN laboratory.

During my research activity, I mentored several PhD students from Italian, UK, USA and German universities, working on NA62. I was also co-supervisor of a PhD student of George-Mason University (USA) and supervisor of a PhD student in data science applied to NA62 of Lancaster University.

Scientific publications summary (2022)

Citation report (Scopus): 253 articles; 7386 citations; h-index 38

Teaching activity

• 2021 – present: chair of the module “Metodi Sperimentali della fisica Subnucleare”, Physics Department, second year Laurea Magistrale in Physics, University of Firenze.
• 2021 – present: chair of the module “Principi di Meccanica” (cognomi A-D),, Engineering Department, first-year Laurea Triennale in Engineering, University of Firenze.
• 2020 – 2021 : co-chair of the module “Principi di elettromagnetismo” (cognomi O-Z), Engineering Department, first-year Laurea Triennale in Engineering, University of Firenze.
• 2018 – 2020 chair of the course “Experimental methods in particle physics', fourth-year undergraduates in Physics, Physics Department, University of Lancaster.
• 2017 – 2018: co-chair of the course ``laboratory of nuclear physics'', third-year undergraduates in Physics, Physics Departement, University of Lancaster.
• 2010: tutor for the course: ``Elettromagnetismo II'', third-year undergraduate in Mathematics, Physics Department, University of Pisa.
• 2009-2010: demonstrator for the laboratory course: ``Laboratorio di fisica nucleare'', fourth-year undergraduates in Physics, Physics Department, University of Pisa.
• 2009: tutor for the course: ``Fisica I'', first-year undergraduate in Physics, Physics Department, University of Pisa.
• 2008: demonstrator for the course: ``Laboratorio di Fisica I'', first-year undergraduates of Classe di Scienze, Scuola Normale Superiore, Pisa.