Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Vernazza, L."'
The lack of convergence of the convolution integrals appearing in next-to-leading-power (NLP) factorization theorems prevents the applications of existing methods to resum power-suppressed large logarithmic corrections in collider physics. We conside
Externí odkaz:
http://arxiv.org/abs/2205.04479
Autor:
Frixione, S., Laenen, E., Calame, C. M. Carloni, Denner, A., Dittmaier, S., Engel, T., Flower, L., Gellersen, L., Hoeche, S., Jadach, S., Masouminia, M. R., Montagna, G., Nicrosini, O., Piccinini, F., Plätzer, S., Price, A., Reuter, J., Rocco, M., Schönherr, M., Signer, A., Sjöstrand, T., Stagnitto, G., Ulrich, Y., Verheyen, R., Vernazza, L., Vicini, A., Ward, B. F. L., Zaro, M.
This white paper concerns theoretical and phenomenological aspects relevant to the physics of future $e^+e^-$ colliders, in particular regarding initial-state QED radiation. The contributions each contain key technical aspects, and are formulated in
Externí odkaz:
http://arxiv.org/abs/2203.12557
Publikováno v:
Phys. Rev. D 103, 034022 (2021)
We generalise the factorization of abelian gauge theory amplitudes to next-to-leading power (NLP) in a soft scale expansion, following a recent generalisation for Yukawa theory. From an all-order power counting analysis of leading and next-to-leading
Externí odkaz:
http://arxiv.org/abs/2008.01736
Autor:
Bahjat-Abbas, N., Bonocore, D., Damsté, J. Sinninghe, Laenen, E., Magnea, L., Vernazza, L., White, C. D.
Perturbative cross-sections in QCD are beset by logarithms of kinematic invariants, whose arguments vanish when heavy particles are produced near threshold. Contributions of this type often need to be summed to all orders in the coupling, in order to
Externí odkaz:
http://arxiv.org/abs/1905.13710
We consider the production of an arbitrary number of colour-singlet particles near partonic threshold, and show that next-to-leading order cross sections for this class of processes have a simple universal form at next-to-leading power (NLP) in the e
Externí odkaz:
http://arxiv.org/abs/1706.04018
Soft and collinear radiation is responsible for large corrections to many hadronic cross sections, near thresholds for the production of heavy final states. There is much interest in extending our understanding of this radiation to next-to-leading po
Externí odkaz:
http://arxiv.org/abs/1610.06842
Threshold logarithms become dominant in partonic cross sections when the selected final state forces gluon radiation to be soft or collinear. Such radiation factorizes at the level of scattering amplitudes, and this leads to the resummation of thresh
Externí odkaz:
http://arxiv.org/abs/1503.05156
Publikováno v:
Acta Phys.Polon.B3:227-233,2010
The discrepancies found in the B->pi K decays between theory and experiment suggest the presence of new physics in the electroweak penguin sector of the theory. We show that this hypothesis can be tested more efficiently including in the analysis the
Externí odkaz:
http://arxiv.org/abs/0910.2809
Publikováno v:
Eur.Phys.J.C61:429-438,2009
We present an analysis of non-leptonic B decays in the minimally flavour-violating MSSM with large tan(beta). We relate the Wilson coefficients of the relevant hadronic scalar operators to leptonic observables, showing that the present limits on the
Externí odkaz:
http://arxiv.org/abs/0901.4841
Autor:
Beneke, M., Vernazza, L.
Publikováno v:
Nucl.Phys.B811:155-181,2009
We demonstrate that exclusive B decays to P-wave charmonium factorize in the non-relativistic limit provided that colour-octet contributions are taken into account, and estimate the branching fractions. Although there are very large uncertainties, we
Externí odkaz:
http://arxiv.org/abs/0810.3575