Properties of dual multiloop amplitudes
نویسندگان
چکیده
منابع مشابه
Covariant Multiloop Superstring Amplitudes
Talk given at Strings 2004 In these proceedings, the multiloop amplitude prescription using the super-Poincaré invariant pure spinor formalism for the superstring is reviewed. Unlike the RNS prescription , there is no sum over spin structures and surface terms coming from the boundary of moduli space can be ignored. Massless N-point multiloop amplitudes vanish for N < 4, which implies (with two...
متن کاملHidden Beauty in Multiloop Amplitudes
Planar L-loop maximally helicity violating amplitudes in N = 4 supersymmetric Yang-Mills theory are believed to possess the remarkable property of satisfying iteration relations in L. We propose a simple new method for studying the iteration relations for four-particle amplitudes which involves the use of certain linear differential operators and eliminates the need to fully evaluate any loop i...
متن کاملThe field theory limit of multiloop string amplitudes
We report on recent progress in the use of string techniques for the computation of field theory amplitudes. We show how one–loop renormalization constants in Yang–Mills theory can be computed using the open spinning string, we review the calculation of two–loop scalar amplitudes with the bosonic string, and we briefly indicate how the technique can be applied to the two–loop vacuum bubbles of ...
متن کاملMultiloop Superstring Amplitudes from Non-minimal Pure Spinor Formalism
Using the non-minimal version of the pure spinor formalism, manifestly super-Poincaré covariant superstring scattering amplitudes can be computed as in topological string theory without the need of picture-changing operators. The only subtlety comes from regularizing the functional integral over the pure spinor ghosts. In this paper, it is shown how to regularize this functional integral in a B...
متن کاملDual Amplitudes and Basic Assumptions
Four simple assumptions for scattering amplitudes are proposed in order to derive dual amplitudes. The assumptions are conventional except the one which states that each term of an amplitude, corresponding to a certain combination of Regge poles ins, t and u channels, is constructed by a triple product form of three unknown functions, U1 (t), {12 (s) and us (u). This is arrived at by an abstrac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Il Nuovo Cimento A
سال: 1971
ISSN: 0369-3546,1826-9869
DOI: 10.1007/bf02731520