Tribute to Francisco (Paco) Yndurain

arXiv:0902.1322v2 [physics.hist-ph] 11 Feb 2009 Tribute to Francisco (Paco) Yndurain Stephan Narison∗† Laboratoire de Physique Théorique et Astroparticules, CNRS - IN2P3 & Université de Montpellier II, Case 070, Place Eugène Bataillon, 34095 - Montpellier Cedex 05, France E-mail: snarison@yahoo.fr This part of the talk aims to present briefly the biodata and the exceptional career of Paco Yndurain who left us suddenly in June 2008. The scientific part: Light Scalar Mesons in QCD is published in the proceedings of QCD 08 (Montpellier 7-12th july 2008: arXiv:0811.0563 [hep-ph]). 8th Conference Quark Confinement and the Hadron Spectrum September 1-6 2008 Mainz, Germany ∗Speaker. †Invited plenary talk. c ⃝Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. http://pos.sissa.it/ Paco Yndurain Stephan Narison 1. Introduction These last months were very sad for our community as we have suddenly lost our colleagues and friends: Paco YNDURAIN (Dec. 1940 - June 2008), Jan STERN (June 1942 - July 2008) and Giuseppe NARDULLI (July 1948 - June 2008) 1. Before starting my talk dedicated to Paco Yndurain, I ask 1mn of silence for their memory. 2. Introduction to Paco Paco at QCD 06 1The two first photos have been taken during Paco and Jan participation at QCD 06 (Montpellier, 4-7th July 2006). 2 Paco Yndurain Stephan Narison I met Paco in 1975 when preparing my “Doctorat of 3ème cycle" in Marseille on the “hadronic contributions to the muon anomalous magnetic moment”, where he has been one of the referees of my thesis. In that time, I have been impressed by his physics intuition and knowledge and by his friendship. I have appreciated his human relation and also benefited from his encouragement during his multiple visits to Marseille. Later on in 1979, we have started to work on the “sum of light the quark masses in QCD" with Carlo Becchi and Eduardo de Rafael. He has invited me to the Pyrenees school and then to Madrid in 79. Driving to Madrid, he has friendly convinced me to compute the radiative corrections to the (pseudo)scalar two-point correlator which few months later becomes the first calculation of this quantity and the first prediction on the running values of the sum of light quark masses in QCD. Since then, though we have not worked directly together, we have continued to share our interests in physics (especially in QCD). Paco was also the Interna- tional Committee member of the QCD Conference series in Montpellier since its creation in 1985, where he came often as an active participant. In the following, I shall give a short review of his formation and brilliant career 2. 3. Paco formation and itinerary University of Zaragoza • Master in Mathematics 1962, • PhD in Physics 1964: “Definitions of hamiltonians and renormalization" • Assistant Prof. 64-66 University of New York • Fullbright Fellow 66-67 • Associate Researcher 67-68 CERN Theory Division • Research Fellow 68-70 • Senior Scientific Associate 76 and 85 University of Madrid • Professor 1970 U. Complutense • Full Professor since 1971 in the Autònoma University. Paco is reputed to be an Excellent Teacher ! 2Some parts of this talk have been inspired from the one of José Pelaez at QCD 08 ( 7-12th July 2008, Montpellier). 3 Paco Yndurain Stephan Narison 4. PACO (important) positions • Director of the Theoretical Physics Department UAM, 74-77, 81-84 • Dean of the UAM Science Faculty 1975 • Research Vice-rector UAM 78-81 • Scientific Advisor of IBM 83-85 and of Scientific Research of Kuwait 80-82 • Elected Member of the Eur. Phys. Soc., 83-89 • Elected Member of the Scientific Policy Committee of CERN, 88-94. • Elected Member by the Senate of the Spanish University Council • Elected Member of the World Innovation Foundation, London, 2001 • Elected President of the Physics and Chemistry Section of the Spanish Royal Academy 2002. Among the Fathers 3 of High-Energy Physics (HEP) in Spain ! 5. PACO Mobilities • CERN - Theory division • Michigan (Veltman-Zakharov) • Marseille (de Rafael), • NIKHEF, Brookhaven, Orsay, Saclay, Groningen, Vienna, La Plata, Bogotà, Caracas. 6. PACO Societies & Honours • Founder member of the European Physical Society • Invited member of the American Association for the Advancement of Science • Invited memeber of the New York Academy of Sciences • Member of the Spanish Royal Physics Society • Member of the Spanish Royal Mathematical Society. 7. International Committee Member and Participation to Conferences • Series of Confinement : since its creation in 1994 • Series of QCD-Montpellier: since its creation in 1985. 3It includes my former collaborator and friend Pedro Pascual who also left us few years ago. 4 Paco Yndurain Stephan Narison 8. PACO (wide) Research Interests: an Outstanding Physicist ! Publications Paco has worked in different fields of High-Energy Physics (electroweak, supersymmetry, QCD, pion-pion scattering,..). He has written: • 158 publications (articles and confe

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