**Lochlainn O’Raifeartaigh**

**Biographies/ obituaries**

Obituary (*Physics Today*)

Obituary (*Journal of Physics*)

Obituary (*Physics World* )

Obituary* (The Irish Times)*

Obituary (*IoP, Ireland* )

Memorial* (Dublin Institute for Advanced Studies)
*

Biography: *Physicists of Ireland: Passion and Precision (IoP), chapter 12 (Siddartha Sen)*

**Wikipedia entry**

**Lochlainn O’Raifeartaigh** (1933 -2000) was an Irish physicist of world-wide repute in the field of theoretical particle physics. He is best known for the O’Raifeartaigh Theorem, an important result in unification theory, and the O’Raifeartaigh Model of supersymmetry breaking.

O’Raifeartaigh was born in Dublin in 1933, and most of his scientific career was centred around that city, where he obtained his first degrees at University College Dublin (BA in 1953 and MSc in Mathematical Physics in 1956), and spent from 1968 until his death as Senior Professor at the Dublin Institute for Advanced Studies. He obtained his doctorate from the University of Zurich in 1960, under Walter Heitler. He also visited many institutions, notably Madras, IHES Bures, and Princeton University, but it was during an extended stay at Syracuse University (1964-8) that he made the discovery that established his reputation. This result, which became known as O’Raifeartaigh’s no-go theorem, showed that it was impossible to combine internal and relativistic symmetries other than in a trivial fashion, thus ending a widespread quest by the particle physics community to achieve this fusion.

O’Raifeartaigh’s prolific career in theoretical physics was manifested by many fundamental contributions to the application of symmetries in particle physics. In the 1970s he showed that the new supersymmetries could provide a mechanism (O’Raifeartaigh’s mechanism) for circumventing his no-go theorem which had assumed only classical Lie group symmetries. In the 1980s he applied non-Abelian gauge theory to the analysis of magnetic monopoles. His interests encompassed the spin-statistics theorem, Kac-Moody and W-algebras, and included early contributions to the theory of non-invariance (dynamical) groups, among much else. His long and productive career in the application of symmetry methods to theoretical physics was acknowledged by the award of the Wigner Medal in August 2000.

**Bibliography**

Books (5), book chapters (6), review articles (12), journal articles (130) and conference proceedings (70)

**Books**

1. Lectures on Local Lie Groups and Their Representations

*(Matscience Report 25, Madras Institute for Mathematical Science , Madras, 1964)*

2. General Relativity; Papers in Honour of JL Synge

*(Clarendon Press, Oxford 1972)*

3. Lecture Notes on Supersymmetry

*(Dublin Institute for Advanced Studies, 1975)*

4. The Group Structure of Gauge Theories

*(Cambridge University Press, 1986)*

5. The Dawning of Gauge Theory

*(Princeton University Press, 1997)*

**O’Raifeartaigh Conferences**

0. Fundamental problems conference in honour of the 65th birthday of Lochlainn O’Raifeartaigh

*Birthday conference (Trinity College Dublin, 1998)*

1. O’Raifeartaigh Memorial Conference

*First Memorial Conference (DIAS, Dublin, 2002)*

2. O’Raifeartaigh Symposium on non-purtabative and symmetry methods in field theory

*Second Memorial Conference (KFKI, Budapest, 2006)*

Conference announcement* (26/06/06, The Irish Times)*

3. O’Raifeartaigh Symposium on symmetry and integrability

*Third Memorial Conference (LMU, Munich, July 19-21st, 2012)
*

Cormac’s Life-in-Science talk Slides (ppt)

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