n jets, with n up to seven, demonstrates the efficiency of the approach.
Comment: 8 pages, talk given at Radcor2011 -->

Druh dokumentu:	Working Paper
Přístupová URL adresa:	http://arxiv.org/abs/1112.3521
Přírůstkové číslo:	edsarx.1112.3521
Autor:	Becker, S., Goetz, D., Reuschle, C., Schwan, C., Weinzierl, S.
Rok vydání:	2011
Předmět:	High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	In this talk we discuss an algorithm for the numerical calculation of one-loop QCD amplitudes and present results at next-to-leading order for jet observables in electron-positron annihilation calculated with the above-mentioned method. The algorithm consists of subtraction terms, approximating the soft, collinear and ultraviolet divergences of QCD one-loop amplitudes, as well as a method to deform the integration contour for the loop integration into the complex plane to match Feynman's i delta rule. The algorithm is formulated at the amplitude level and does not rely on Feynman graphs. Therefore all ingredients of the algorithm can be calculated efficiently using recurrence relations. The application of this method to the leading-colour contribution of e+ e- --> n jets, with n up to seven, demonstrates the efficiency of the approach. Comment: 8 pages, talk given at Radcor2011
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1112.3521 Zobrazit plný text záznamu View this record from Arxiv