in the Standard Model with  G.M. Pruna and A. Signer , The  R. Alonso , B. Grinstein and J. Martin Camalich , SU( 2 )  R. Alonso , B. Grinstein and J. Martin Camalich , Lepton universality ... ) 41  A. Crivellin , S. Davidson , G.M. Pruna and A. Signer , Complementarity in lepton- avour  A. Crivellin , F. D'Eramo and M. Procura , New Constraints on Dark Matter E ective Theories from
We give an introduction to several regularization schemes that deal with ultraviolet and infrared singularities appearing in higher-order computations in quantum field theories. Comparing the computation of simple quantities in the various schemes, we point out similarities and differences between them.
. Magnea, Infrared singularities in QCD amplitudes,  G. 't Hooft and M.J.G. Veltman, Regularization and Renormalization of Gauge Fields,  A. Broggio, C. Gnendiger, A. Signer, D. St¨ockinger and A ... . Visconti, SCET approach to  Z. Kunszt, A. Signer and Z. Tro´csa´nyi, One loop helicity amplitudes for all 2 → 2 processes  S. Catani, M.H. Seymour and Z. Tro´csa´nyi, Regularization scheme
, Supersymmetric Dimensional Regularization via Dimensional Reduction,  Z. Bern and D.A. Kosower, The computation of loop amplitudes in gauge theories,  A. Signer and D. St¨ockinger, Using Dimensional ... (2013) 024] [arXiv:0903.1126] [INSPIRE]. [hep-ph/9305239] [INSPIRE].  Z. Kunszt, A. Signer and Z. Tro´csa´nyi, One loop helicity amplitudes for all 2 → 2 processes in QCD and N = 1 supersymmetric
. Bern , D.A. Kosower , The computation of loop amplitudes in gauge theories . Nucl. Phys. B 379 , 451 - 561 ( 1992 ) 17. Z. Kunszt , A. Signer , Z. Trocsanyi , One loop helicity amplitudes for all 2 → 2 ... , Regularization by dimensional reduction: consistency, quantum action principle, and supersymmetry . JHEP 0503 , 076 ( 2005 ). arXiv:hep-ph/0503129 23. A. Signer , D. Stöckinger , Factorization and regularization
We implement a systematic effective field theory approach to the benchmark process μ → eγ, performing automated one-loop computations including dimension 6 operators and studying their anomalous dimensions. We obtain limits on Wilson coefficients of a relevant subset of lepton-flavour violating operators that contribute to the branching ratio μ → eγ at one-loop. In addition, we ...
We extend approximate next-to-next-to-leading order results for top-pair production to include the semi-leptonic decays of top quarks in the narrow-width approximation. The new hard-scattering kernels are implemented in a fully differential parton-level Monte Carlo that allows for the study of any IR-safe observable constructed from the momenta of the decay products of the top. Our ...
o -shell top-antitop production with leptonic decays at hadron colliders, JHEP 10 (2012) 110 [arXiv:1207.5018] [INSPIRE].  P. Falgari, P. Mellor and A. Signer, Production-decay interferences at