Ikaros Bigi

Emeritus Professor
Theoretical High Energy Physics

Diploma, Universität München, Germany, 1973
Ph.D., ibid., 1976
Habilitation, Technische Hochschule Aachen, Germany, 1984

Personal Page:
Address: NSH 333f
Phone: (574) 631-7108
Fax: (574) 631-5952

Research Interests

Prof. Bigi’s research has focused on refining the standard model phenomenology for the decays of hadrons carrying the quantum numbers strangeness, charm and beauty and on electric dipole moments to use them as ‘indirect’ searches for new physics. He is concentrating on rare weak decays and particle-antiparticle oscillations, in particular when CP invariance is broken. In 2001 the B factories in Stanford and Japan found the first CP violation outside KL decays in B /to /psi K_S, as predicted by Sanda and Bigi in 1980. While CKM dynamics has been shown to provide at least the lion’s share of CP violation as observed in particle decays, it cannot drive baryogenesis. Thus new physics with CP violation has to exist. He has been advocating the construction of Super-Flavor Factories as envisioned in Japan and Italy. For precision studies of CP violation and rare decays of B and D mesons and of /tau leptons represent high sensitivity probes of the anticipated TeV scale new dynamics. He has been increasingly intrigued by theories with extra dimensions, since he views them as a sufficiently radical departure from conventional thinking that they might lead to novel insights into the flavour problem. In unguarded moments Prof. Bigi is thinking about limitations to quantum mechanics and worlds with more than one time dimension. Bigi is convinced that basic science needs a broader geographical distribution to continue flourishing. Therefore he has committed a significant amount of his time to support the evolution of high energy physics in `emerging countries.’

Selected Publications

“Aspects of Heavy Quark Theory,” I.I. Bigi, M. Shifman, N. Uraltsev, Annu. Rev. Nucl. Part. Sci. 47 (1997) 591.
“A Cicerone for the Physics of Charm,” D. Benson, I. Bigi, S. Bianco, F. Fabbri, La Rivista di Nuovo Cimento, # 7-8 (2003) 1.
“Matter-antimatter oscillations and CP violation as manifested through quantum mysteries,” I.I. Bigi, Rep. Prog. Phys. 70 (2007) 1 – 68.

“CP Violation, Second Edition,” I.I. Bigi, A.I. Sanda, Cambridge University Press (2009).

“CP Violation in D0 - anti-D0 Oscillations: General Considerations and Applications to the Littlest Higgs Model with T-Parity,” Ikaros I. Bigi (Notre Dame U.), Monika Blanke (Munich, Tech. U. & Munich, Max Planck Inst.), Andrzej J. Buras (Munich, Tech. U. & TUM-IAS, Munich), Stefan Recksiegel(Munich, Tech. U.).  JHEP 0907 (2009) 097.

“On a CP anisotropy measurement in the Dalitz plot,” Bediaga (Rio de Janeiro, CBPF), I.I. Bigi (Notre Dame U.), A. Gomes, G. Guerrer, J. Miranda, A.C.dos Reis (Rio de Janeiro, CBPF, Phys.Rev. D80 (2009) 096006.
“Conclusions from CDF Results on CP Violation in D^0 \to \pi^+\pi^-, K^+K^- and Future Tasks,” Ikaros I. Bigi, Ayan Paul (Notre Dame U.), Stefan Recksiegel (Munich, Tech. U.), JHEP 1106 (2011) 089.
“Implications of LHCb measurements and future prospects”,  LHCb Collaboration (R Aaij (NIKHEF, Amsterdam) et al.), 178 pp. Eur.Phys.J. C73 (2013) 2373.

Honors and Awards

  • Mercator Visiting Professorship 2002
  • Organized the “Colloquium on Time & Matter” in Venice (Italy) 2002 with M. Faessler from the Ludwig-Maximilians-Universitaet in Munich
  • The J.J. Sakurai Prize 2004 from the American Physical Society
  • Member of the International Advisory Committee of the 2nd, 3rd & 4th Conferences on “Time & Matter” in Bled, Slovenia, 2007, Budva (Montenegro), 2010 and again in Venice, 2013.
  • Member of the International Advisory Committee of the “International Workshop on Physics at Future High Intensity Collider @ 2-7 GeV in China,” January 2015


Prof. Bigi's Full Curriculum Vitae (pdf)