ROOT Development Team

The ROOT development team consists of the following people:

Pere Mato

Pere Mato picture. Pere Mato bio.

Philippe Canal

Philippe Canal is working at the FNAL Computing Division since 1995. Philippe graduated from Ecole Centrale Paris and has a Master in Computer Science. Philippe is responsible for the development of the I/O sub-system and the Tree query mechanism. He is of great help for many problems and questions related to CINT or the I/O sub system in general for which he has developed a powerful test suite. Philippe coordinates the support for ROOT for all FNAL experiments. Philippe Canal

Bertrand Bellenot

Bertrand Bellenot Bertrand was primary working in Aluminum industry as process engineer, developing software for data acquisition, data analysis, statistical process control (SPC) and for X-Ray spectrometry. He has been involved in ROOT development since 2001 by porting ROOT to Windows. Bertrand is a member of the ROOT development team at CERN since August 2005. He's currently working on GUI (Graphical User Interface), core (mainly Windows support), and support of PROOF (Parallel Root Facility) on Windows.

Olivier Couet

Olivier Couet received a Physic's Master from the Strasbourg University and a Master’s Degree in Engineering from the "Ecole Nationale Supérieure de Physique de Strasbourg" (ENSPS) on work in computer graphics and image processing in 1985. He then performed his Ph.D work (in Computer Graphics) at the "Laboratoire D'Annecy le Vieux de Physique des Particules" (LAPP) on the PAW project. He has been employed by CERN since 1988. He was one of the main authors of the PAW system, more precisely its graphical components (HIGZ and HPLOT). HIGZ has been the standard graphics package in High Energy Physics for years and is still being used. He was responsible for the PAW system from 1995 until he joined the ROOT team in 2002 and took responsibility of the graphics work package. Olivier's picture

Axel Naumann

Axel Naumann Starting off as a physicist, Axel studied physics and math in Muenster, Germany. In 2000, he got a Ph.D. position for high energy physics in Nijmegen, The Netherlands. They sent him to Fermilab at Chicago, where he worked with the D0 experiment - which also meant writing software from PCI drivers to data analysis code. During that time he got involved with ROOT, slowly converting from a user to a developer. He contributed to whatever he needed, e.g. the statistics part, the documentation engine, and porting it to cygwin. After a position with the Fermilab Computing Division in 2005 he ended up at CERN in the ROOT development team.

Gerardo Ganis

Gerri Ganis is an experimental high-energy physicist. He graduated in Physics at the University of Trieste, Italy, in 1988. He worked for many years in the ALEPH experiment at LEP in particular in the fields of offline data analysis and software development. In 2002, he joined the CERN PH-SFT group and the ROOT development team. He is currently the main developer and architect of the PROOF system. He is also responsible for the security infrastructure of the ROOT and XROOTD/SCALLA systems. Gerri's picture

Danilo Piparo


Danilo is an experimental HEP physicist. As a member of the      CMS collaboration, he graduated in 2007 but already during his studies he worked for the CERN IT department. He obtained his PhD at the Karlsruhe Institute of Technology in 2010 to then immediately join CERN as responsible of many software operations of the CMS experiment. The high performance and parallel software expert of the SFT group, he joined the ROOT team in 2013. His main responsibility is the I/O subsystem but he is actively involved in the development and support of reflection and mathematical libraries.

Lorenzo Moneta

Lorenzo started working in 1989 as an experimental physicist for the ALEPH experiment working for data analysis and software event reconstruction. He graduated in Pisa in 1990 and he received his Ph.D. in particle physics in 1994 at the University of Florence. Afterwards, since 1997, he was working for data analysis of the CDF experiments and online software for the ATLAS experiment. In 2002 he joined the physics application software group of CERN, and since 2005 he joined the ROOT team with the responsibility of the Math work package, which provides development and support for the ROOT mathematical and statistical libraries.  Lorenzo Moneta

Vasil Vasilev

Vasil Vasilev Vasil obtained a Bachelor’s Degree in computer science in September 2009 from the Faculty of Mathematics and Informatics at the University of Plovdiv “Paisii Hilendarski”. A year later he got a Master's Degree in Software Technologies at the same institution. Vasil had the excellent opportunity to be a teaching assistant at his faculty, and to teach a number of courses – Computer Graphics and Presentations, Object-Oriented Programming, and Methods of Translation. For the time being, his research interests lie in the general area of programming language design and implementation and software optimization. Vasil is currently working on Cling - an interactive C++ interpreter, using the LLVM and Clang infrastructure. In particular he is responsible for the implementation of the CINT-specific C++ language extensions in Cling.