Journal Articles

  1. A new twist on the geometry of gravitational plane waves. Journal of High Energy Physics 2017(9)
  2. & Leptogenesis and gravity: Baryon asymmetry without decays. Physics Letters B 766, 162-169.
  3. & Causality, renormalizability and ultra-high energy gravitational scattering. Journal of Physics A: Mathematical and Theoretical 49(21), 215401
  4. & Causality Violation, Gravitational Shockwaves and UV Completion. Journal of High Energy Physics 1603, 129
  5. & Leptogenesis from loop effects in curved spacetime. Journal of High Energy Physics 1604, 030
  6. & Radiatively-induced gravitational leptogenesis. Physics Letters B B751, 469-473.
  7. & Gravitational leptogenesis, C, CP and strong equivalence. Journal of High Energy Physics(2015:76)
  8. & The quark condensate in multi-flavour QCD – planar equivalence confronting lattice simulations. Physics Letters B 741, 184-189.
  9. Polarised structure functions and two-photon physics at Super-B. The European Physical Journal C 73(3)
  10. & The Unbearable Beingness of Light - dressing and undressing photons in black hole spacetimes. Int. J. Mod. Phys. D 21, 1241003-1241010.
  11. THE UNBEARABLE BEINGNESS OF LIGHT — Dressingand Undressing Photonsin Black Hole Spacetimes. International Journal of Modern Physics D "D21"(11), 1241003
  12. & The effect of gravitational tidal forces on renormalized quantum fields. Journal of High Energy Physics 2012(2), 120
  13. & The effect of gravitational tidal forces on vacuum polarization: How to undress a photon. Physics Letters B 691(5), 279-284.
  14. & `Superluminal' Photon Propagation in QED in Curved Spacetime is Dispersive and Causal. arXiv:1006.1238
  15. & The refractive index of curved spacetime II: QED, Penrose limits and black holes. Journal of High Energy Physics 2009(08), 089
  16. & The causal structure of QED in curved spacetime: analyticity and the refractive index. Journal of High Energy Physics 2008(12), 091
  17. & The refractive index of curved spacetime: The fate of causality in QED. Nuclear Physics B 795(1-2), 138-171.
  18. & Causality and Micro-Causality in Curved Spacetime. Phys. Lett. B 655, 67-74.
  19. Superluminality and UV completion. Nuclear Physics B 778(3), 219-258.
  20. Pseudoscalar meson decay constants and couplings, the Witten-Veneziano formula beyond large N(c), and the topological susceptibility,. Nucl. Phys. B 744, 34-58.
  21. & Quark condensate in massless QCD from planar equivalence. Nucl. Phys. B 740(1-2), 23-35.
  22. Strong equivalence, Lorentz and CPT violation, anti-hydrogen spectroscopy and gamma-ray burst polarimetry. Nuclear Physics B 717(1-2), 86-118.
  23. The Polarised photon g(1) gamma sum rule at the linear collider and high luminosity B factories. Nucl. Phys. B 712(1-2), 411-429.
  24. Quantum gravitational optics. Contemp. Phys. 44(6), 503-521.
  25. Constructing Time Machines. Int. J. Mod. Phys. 18(23), 4169-4200.
  26. A local effective action for photon–gravity interactions. Nucl. Phys. B 646(1-2), 281-300.
  27. Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation. Nucl. Phys. B 633(1-2), 271-294.
  28. η′(η) → γγ : A Tale of Two Anomalies. Phys. Scripta T99, 84-95.
  29. Accelerating photons with gravitational radiation. Nucl. Phys. B 605(1-3), 455-466.
  30. The gauge-invariant angular momentum sum-rule for the proton. Nuclear Physics B "B581"(1-2), 409-431.
  31. Radiative η′ decays, the topological susceptibility and the Witten–Veneziano mass formula. Nuclear Physics B "B569"(1-3), 107-124.
  32. & Target fragmentation in semi-inclusive DIS: Fracture functions, cut vertices and the OPE. Nuclear Physics B "B555"(1-2), 259-278.
  33. & Topological charge screening and the ‘proton spin’ beyond the chiral limit. Nuclear Physics B "B546"(1-2), 235-278.
  34. Testing target independence of the ‘proton spin’ effect in semi-inclusive deep-inelastic scattering. Nuclear Physics B "B516"(1-2), 333-353.
  35. The Schrödinger wave functional and vacuum states in curved spacetime II: Boundaries and foliations. Nuclear Physics B "B530"(1-2), 279-303.
  36. The Schrödinger wave functional and vacuum states in curved spacetime. Nuclear Physics B "B530"(1-2), 247-278.
  37. “Faster than light” photons and rotating black holes. Physics Letters B "B367"(1-4), 75-83.
  38. ‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons. Nuclear Physics B "B460"(2), 379-396.
  39. & Target independence of the EMC-SMC effect. Nuclear Physics B "B433"(1), 209-233.
  40. “Faster than light” photons and charged black holes. Nuclear Physics B "B425"(3), 634-650.


  1. The c and a-theorems and the Local Renormalisation Group. Springer International Publishing.

Book Chapters

  1. The U(1)A Anomaly and QCD Phenomenology. In Lecture Notes in Physics. (pp. 235-288). Springer-Verlag.
  2. Causality and Superluminal Light. In I.I. Bigi & M. Faessler (Ed.), Time and Matter. (pp. 45-66). Singapore: World Scientific.
  3. U_A(1) problems and gluon topology: Anomalous symmetry in QCD. In Hidden Symmetries and Higgs Phenomena. Proceedings,Zuoz 1998. (pp. 201-223).
  4. The Proton spin crisis: Another ABJ anomaly?. In From the Planck length to the Hubble radius. Proceedings, Erice 1998. (pp. 79-105).
  5. Target fragmentation at polarized HERA: A Test of universal topological charge screening in QCD. In Physics with polarized protons at HERA. Proceedings, Hamburg 1997. (pp. 194-201).
  6. The Standard Model. In School for Young High Energy Physicists. Proceedings, Abingdon 1995.. (pp. 99-154).

Conference Contributions

  1. (1997). The ‘proton spin’ effect — theoretical status '97. Presented at Nuclear Physics B - Proceedings Supplements,(1-3), 167-178. doi:10.1016/S0920-5632(97)01056-6
  2. (1996). A test of target independence of the ‘proton spin’ effect in semi-inclusive deep inelastic scattering. Presented at Nuclear Physics B - Proceedings Supplements,(1-2), 122-126. doi:10.1016/S0920-5632(97)00026-1
  3. (1994). Target independence of the ‘proton spin’ effect. Presented at Nuclear Physics B - Proceedings Supplements,(2-3), 101-105. doi:10.1016/0920-5632(95)00051-A