Author

Souvik Bera

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Preprint Oct 2026

Two-loop integrals for $t\bar{t}\gamma$ production at hadron colliders in the leading-colour approximation

We complete the calculation of the two-loop Feynman integrals required for the next-to-next-to-leading order QCD corrections to on-shell top--antitop production in association with a photon at hadron colliders, in the leading-colour approximation. The same integrals also enter the subleading-colour corrections to top--...

Souvik Bera, C. Brancaccio, D. Canko et al. · 0 citations

Review Aug 2026

Elements of Topology, Differential Geometry and General Relativity for Physicists: A Mathematica-based Tutorial Approach

This book is a self-contained, tutorial introduction to topology, differential geometry, and general relativity for students and researchers in physics. Its distinguishing feature is a Mathematica-based approach that makes abstract constructions concrete through explicit, runnable notebooks and worked examples. A key c...

Balasubramanian Ananthanarayan, Souvik Bera, Subhasis Chakrabarty et al. · 0 citations