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Renormalisation-group improved analysis of μ → e processes in a systematic effective-field-theory approach

in the Standard Model with [28] G.M. Pruna and A. Signer , The [29] R. Alonso , B. Grinstein and J. Martin Camalich , SU( 2 ) [30] R. Alonso , B. Grinstein and J. Martin Camalich , Lepton universality ... ) 41 [58] A. Crivellin , S. Davidson , G.M. Pruna and A. Signer , Complementarity in lepton- avour [59] A. Crivellin , F. D'Eramo and M. Procura , New Constraints on Dark Matter E ective Theories from

To \({d}\) , or not to \({d}\) : recent developments and comparisons of regularization schemes

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.

Regularization-scheme dependence of QCD amplitudes in the massive case

. Magnea, Infrared singularities in QCD amplitudes, [5] G. 't Hooft and M.J.G. Veltman, Regularization and Renormalization of Gauge Fields, [8] A. Broggio, C. Gnendiger, A. Signer, D. St¨ockinger and A ... . Visconti, SCET approach to [9] Z. Kunszt, A. Signer and Z. Tro´csa´nyi, One loop helicity amplitudes for all 2 → 2 processes [10] S. Catani, M.H. Seymour and Z. Tro´csa´nyi, Regularization scheme

SCET approach to regularization-scheme dependence of QCD amplitudes

, Supersymmetric Dimensional Regularization via Dimensional Reduction, [3] Z. Bern and D.A. Kosower, The computation of loop amplitudes in gauge theories, [4] A. Signer and D. St¨ockinger, Using Dimensional ... (2013) 024] [arXiv:0903.1126] [INSPIRE]. [hep-ph/9305239] [INSPIRE]. [16] Z. Kunszt, A. Signer and Z. Tro´csa´nyi, One loop helicity amplitudes for all 2 → 2 processes in QCD and N = 1 supersymmetric

Computation of \(H\rightarrow gg\) in fdh and dred: renormalization, operator mixing, and explicit two-loop results

. 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

The μ → eγ decay in a systematic effective field theory approach with dimension 6 operators

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 ...

Renormalization-group improved fully differential cross sections for top pair production

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 ...

Finite-width effects in unstable-particle production at hadron colliders

o -shell top-antitop production with leptonic decays at hadron colliders, JHEP 10 (2012) 110 [arXiv:1207.5018] [INSPIRE]. [13] P. Falgari, P. Mellor and A. Signer, Production-decay interferences at