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Your search keyword '"Verbeek, B."' showing total 12 results
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12 results on '"Verbeek, B."'

1. All-order amplitudes at any multiplicity in the multi-Regge limit

Author

Del Duca, V., Druc, S., Drummond, J. M., Duhr, C., Dulat, F., Marzucca, R., Papathanasiou, G., and Verbeek, B.

Subjects
High Energy Physics - Theory
Abstract

We propose an all-loop expression for scattering amplitudes in planar N=4 super Yang-Mills theory in multi-Regge kinematics valid for all multiplicities, all helicity configurations and arbitrary logarithmic accuracy. Our expression is arrived at from comparing explicit perturbative results with general expectations from the integrable structure of a closely related collinear limit. A crucial ingredient of the analysis is an all-order extension for the central emission vertex that we recently computed at next-to-leading logarithmic accuracy. As an application, we use our all-order formula to prove that all amplitudes in this theory in multi-Regge kinematics are single-valued multiple polylogarithms of uniform transcendental weight., Comment: 6 pages, 2 figures, 2 ancillary files; v2: minor corrections and clarifications, matches published version

Published
2019
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2. Earthquake in a Conflict region: Lift the Sanctions?

Author

Stel, N.M., Swedlund, H.J., and Verbeek, B. prof.

Subjects
Institute for Management Research
Abstract

Item does not contain fulltext Public affairs round table, 09 februari 2023 Radboud Reflects

Published
2023

3. Prospective nationwide outcome audit of surgery for suspected acute appendicitis

Author

van Rossem, C. C., Bolmers, M. D. M., Schreinemacher, M. H. F., van Geloven, A. A. W., Bemelman, W. A., van Acker, G. J. D., Akkermans, B., Akkersdijk, G. J. M., Algie, G. D., Allema, J. H., Andeweg, C. S., Appeldorn, N., van Baal, J. G., den Bakker, C. M., Bartels, S. A. L., van den Berg, C., Boekestijn, B., den Boer, F. C., Boerma, D., van den Boom, A. L., Boute, M. C., Bouwense, S. A. W., Bransen, J., van Brussel, F. A., Busch, O. R. C., de Castro, S. M. M., Cense, H. A., Croese, C., van Dalen, T., Dawson, I., van Dessel, E., Dettmers, R., Dhar, N., Dohmen, F. Y. M., van Dongen, K. W., van Duijvendijk, P., Dulfer, R. R., Dwars, B. J., Eerenberg, J. P., van der Elst, M., van den Ende, E., Fassaert, L. M. M., Fikkers, J. T., Foppen, J. W., Furnee, E. J. B., Garssen, F. P., Gerhards, M. F., van Goor, H., Gorter, R. R., de Graaf, J. S., Graat, L. J., Groote, J., van der Ham, A. C., Hamming, J. F., Hamminga, J. T. H., van der Harst, E., Heemskerk, J., Heij, H. A., Heijne, A., Heikens, J. T., Heineman, E., Hertogs, R., van Heurn, E., van den Hil, L. C. L., Hoofwijk, A. G. M., Hulsker, C. C. C., Hunen, D. R. M., Ibelings, M. S., Klaase, J. M., Klicks, R., Knaapen, L., Kortekaas, R. T. J., Kruyt, F., Kwant, S., Lases, S. S., Lettinga, T., Loupatty, A., Matthijsen, R. A., Minnee, R. C., Mirck, B., Mitalas, L., Moes, D., Moorman, A. M., Nieuwenhuijs, V. B., Nieuwenhuijzen, G. A. P., Nijk, P. D., Omloo, J. M. T., Ottenhof, A. G., Palamba, H. W., van der Peet, D. L., Pereboom, I. T. A., Plaisier, P. W., van der Ploeg, A. P. T., Raber, M. H., Reijnen, M. M. P. J., Rijna, H., Rosman, C., Roumen, R. M. H., Schmitz, R. F., van der Velden, Schouten A. P., Schreurs, W. H., Sigterman, T. A., Smeets, H. J., Sonneveld, D. J. A., Sosef, M. N., Spoor, S. F., Stassen, L. P. S., van Steensel, L., Stortelder, E., Straatman, J., van Susante, H. J., de Hoog, Suykerbuyk D. E. N. M., van Scheltinga, Terwisscha C., Toorenvliet, B. R., Verbeek, B. M., Verbeek, P. C. M., Verseveld, M., Volders, J. H., Vriens, M. R., Vriens, P. W. H. E., Vrouenraets, B. C., van de Wall, B. J. M., Wegdam, J. A., Westerduin, E., Wever, J. J., Wijffels, N. A. T., Wijnhoven, B. P. L., Winkel, T. A., van der Zee, D. C., Zeillemaker, A. M., and Zietse, C.

Published
2016
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4. Conclusion

Author

Giacomello G., Verbeek B., G. Giacomello, B. Verbeek, and Giacomello G., Verbeek, B.

Subjects
Foreign policy, international relations, middle powers, Asia, Europa
Abstract

The Conclusion of 'Middle Powers in Asia and Europe' shows that, based on the contributions to the volume, the identification and role of 'middle powers' are quite similar in both geographical areas.

Published
2020

9. Prospective nationwide outcome audit of surgery for suspected acute appendicitis

Author

van Rossem, C C, primary, Bolmers, M D M, additional, Schreinemacher, M H F, additional, van Geloven, A A W, additional, Bemelman, W A, additional, Acker, G J D, additional, Akkermans, B, additional, Akkersdijk, G J M, additional, Algie, G D, additional, Allema, J H, additional, Andeweg, C S, additional, Appeldorn, N, additional, Baal, J G, additional, Bakker, C M, additional, Bartels, S A L, additional, Berg, C, additional, Boekestijn, B, additional, Boer, F C, additional, Boerma, D, additional, Boom, A L, additional, Boute, M C, additional, Bouwense, S A W, additional, Bransen, J, additional, Brussel, F A, additional, Busch, O R C, additional, Castro, S M M, additional, Cense, H A, additional, Croese, C, additional, Dalen, T, additional, Dawson, I, additional, Dessel, E, additional, Dettmers, R, additional, Dhar, N, additional, Dohmen, F Y M, additional, Dongen, K W, additional, Duijvendijk, P, additional, Dulfer, R R, additional, Dwars, B J, additional, Eerenberg, J P, additional, Elst, M, additional, Ende, E, additional, Fassaert, L M M, additional, Fikkers, J T, additional, Foppen, J W, additional, Furnee, E J B, additional, Garssen, F P, additional, Gerhards, M F, additional, Goor, H, additional, Gorter, R R, additional, Graaf, J S, additional, Graat, L J, additional, Groote, J, additional, Ham, A C, additional, Hamming, J F, additional, Hamminga, J T H, additional, Harst, E, additional, Heemskerk, J, additional, Heij, H A, additional, Heijne, A, additional, Heikens, J T, additional, Heineman, E, additional, Hertogs, R, additional, Heurn, E, additional, Hil, L C L, additional, Hoofwijk, A G M, additional, Hulsker, C C C, additional, Hunen, D R M, additional, Ibelings, M S, additional, Klaase, J M, additional, Klicks, R, additional, Knaapen, L, additional, Kortekaas, R T J, additional, Kruyt, F, additional, Kwant, S, additional, Lases, S S, additional, Lettinga, T, additional, Loupatty, A, additional, Matthijsen, R A, additional, Minnee, R C, additional, Mirck, B, additional, Mitalas, L, additional, Moes, D, additional, Moorman, A M, additional, Nieuwenhuijs, V B, additional, Nieuwenhuijzen, G A P, additional, Nijk, P D, additional, Omloo, J M T, additional, Ottenhof, A G, additional, Palamba, H W, additional, Peet, D L, additional, Pereboom, I T A, additional, Plaisier, P W, additional, Ploeg, A P T, additional, Raber, M H, additional, Reijnen, M M P J, additional, Rijna, H, additional, Rosman, C, additional, Roumen, R M H, additional, Schmitz, R F, additional, Velden, A P Schouten, additional, Schreurs, W H, additional, Sigterman, T A, additional, Smeets, H J, additional, Sonneveld, D J A, additional, Sosef, M N, additional, Spoor, S F, additional, Stassen, L P S, additional, Steensel, L, additional, Stortelder, E, additional, Straatman, J, additional, Susante, H J, additional, Hoog, D E N M Suykerbuyk, additional, Scheltinga, C Terwisscha, additional, Toorenvliet, B R, additional, Verbeek, B M, additional, Verbeek, P C M, additional, Verseveld, M, additional, Volders, J H, additional, Vriens, M R, additional, Vriens, P W H E, additional, Vrouenraets, B C, additional, Wall, B J M, additional, Wegdam, J A, additional, Westerduin, E, additional, Wever, J J, additional, Wijffels, N A T, additional, Wijnhoven, B P L, additional, Winkel, T A, additional, Zee, D C, additional, Zeillemaker, A M, additional, and Zietse, C, additional

Published
2015
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10. All-Order Amplitudes at any Multiplicity in the Multi-Regge Limit.

Author

Duca, V. Del, Druc, S., Drummond, J. M., Duhr, C., Dulat, F., Marzucca, R., Papathanasiou, G., and Verbeek, B.

Subjects
*MULTIPLICITY (Mathematics), *YANG-Mills theory, *KINEMATICS
Abstract

We propose an all-loop expression for scattering amplitudes in planar N=4 super Yang-Mills theory in multi-Regge kinematics valid for all multiplicities, all helicity configurations, and arbitrary logarithmic accuracy. Our expression is arrived at from comparing explicit perturbative results with general expectations from the integrable structure of a closely related collinear limit. A crucial ingredient of the analysis is an all-order extension for the central emission vertex that we recently computed at next-to-leading logarithmic accuracy. As an application, we use our all-order formula to prove that all amplitudes in this theory in multi-Regge kinematics are single-valued multiple polylogarithms of uniform transcendental weight. [ABSTRACT FROM AUTHOR]

Published
2020
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11. Full-Color Two-Loop Four-Gluon Amplitude in N=2 Supersymmetric QCD.

Author

Duhr C, Johansson H, Kälin G, Mogull G, and Verbeek B

Abstract

We present the fully integrated form of the two-loop four-gluon amplitude in N=2 supersymmetric quantum chromodynamics with gauge group SU(N_{c}) and with N_{f} massless supersymmetric quarks (hypermultiplets) in the fundamental representation. Our result maintains full dependence on N_{c} and N_{f}, and relies on the existence of a compact integrand representation that exhibits the duality between color and kinematics. Specializing to the N=2 superconformal theory, where N_{f}=2N_{c}, we obtain remarkably simple amplitudes that have an analytic structure close to that of N=4 super-Yang-Mills theory, except that now certain lower-weight terms appear. We comment on the corresponding results for other gauge groups.

Published
2019
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12. International organisations and crisis management: Do crises enable or constrain IO autonomy?

Author

Olsson EK and Verbeek B

Abstract

This article seeks to bridge the gap between the literature on international organisations (IO) and the field of crisis management (CM) by focusing on two themes: how crisis conditions lead organisations to centralise decision-making and how this subsequently affects an international organisation's autonomy. We do this based on two dimensions inspired by the CM literature, that is, the degree of the perceived time pressure and the precrisis legal institutional framework. The plausibility of the analytical framework is assessed on the basis of three cases: the WHO's dealing with the SARS crisis; the European Commission's dealing with the Mad Cow Disease crisis; and the UN's handling of the humanitarian crisis in the Great Lakes region. The results show that the perceived time pressure affected IO autonomy in so far as higher time pressure that rendered IO autonomy stronger, whereas with regard to the institutional framework no stringent pattern could be seen. Moreover, based on our findings, we propose that IO autonomy in crisis situations also depends on the framing of an issue in terms on impartiality, on the extent to which the IO in question is subject to politicisation, as well as on the degree to which it possesses specific technical expertise., (© Macmillan Publishers Ltd 2016.)

Published
2018
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