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Subleading corrections to parity-violating pion photoproduction
Light photons meson photovoltaic coupling
2014/12/22
We compute the photon asymmetry Bγ for near threshold parity-violating (PV) pion photoproduction through subleading order. We show that subleading contributions involve a new combination of PV couplin...
Quantum Corrections to the Gravitational Interaction of Massless Particles
Collinear Divergence Effective Field Theory General Relativity Infrared Divergence Massless Quantum Gravity
2014/11/20
Donoghue's effective field theory of quantum gravity is extended to include the interaction of massless particles. The collinear divergences which accompany massless particles are examined first in th...
Non-linear corrections to inflationary power spectrum
Non-linear corrections inflationary power spectrum
2010/12/21
We study non-linear contributions to the power spectrum of the curvature perturbation on super-horizon scales, produced during slow-roll inflation driven by a canonical single scalar field. We find th...
Hadron electric polarizability -- finite volume corrections
Hadron electric polarizability finite corrections
2011/1/10
We use the background field method to extract the polarizability for the neutral “pion”. In our previous study we found that the polarizability for this system is negative which is believed to be a fi...