Amplitude for N-gluon superstring scattering.
نویسندگان
چکیده
We consider scattering processes involving N gluonic massless states of open superstrings with a certain Regge slope alpha'. At the semiclassical level, the string world-sheet sweeps a disk and N gluons are created or annihilated at the boundary. We present exact expressions for the corresponding amplitudes, valid to all orders in alpha', for the so-called maximally helicity violating configurations, with N = 4, 5 and N = 6. We also obtain the leading O(alpha '2) string corrections to the zero-slope N-gluon Yang-Mills amplitudes.
منابع مشابه
The open superstring 5-point amplitude revisited
We derive the complete five-gluon scattering amplitude at tree level, within the context of Open Superstring theory. We find the general expression in terms of kinematic factors, and also find its complete expansion up to O(α′) terms. We use our scattering amplitude to test three non-equivalent O(α′) effective lagrangians that have recently been matter of some controversy.
متن کاملSupersymmetry Relations and MHV Amplitudes in Superstring Theory
We discuss supersymmetric Ward identities relating various scattering amplitudes in type I open superstring theory. We show that at the disk level, the form of such relations remains exactly the same, to all orders in α′, as in the low–energy effective field theory describing the α′ → 0 limit. This result holds in D = 4 for all compactifications, even for those that break supersymmetry. We appl...
متن کاملExplicit BCJ Numerators from Pure Spinors
We derive local kinematic numerators for gauge theory tree amplitudes which manifestly satisfy Jacobi identities analogous to color factors. They naturally emerge from the low energy limit of superstring amplitudes computed with the pure spinor formalism. The manifestation of the color–kinematics duality is a consequence of the superstring computation involving no more than (n − 2)! kinematic f...
متن کاملMulti–Gluon Scattering in Open Superstring Theory
Abstract We discuss the amplitudes describing N -gluon scattering in type I superstring theory, on a disk world-sheet. After reviewing the general structure of amplitudes and the complications created by the presence of a large number of vertices at the boundary, we focus on the most promising case of maximally helicity violating (MHV) configurations because in this case, the zero Regge slope l...
متن کاملComplete Six–Gluon Disk Amplitude in Superstring Theory
We evaluate all next-to-maximal helicity violating (NMHV) six-gluon amplitudes in type I open superstring theory in four dimensions, at the disk level, to all orders in α′. Although the computation utilizes supersymmetric Ward identities, the result holds for all compactifications, even for those that break supersymmetry and is completely model-independent. Together with the maximally helicity ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 97 21 شماره
صفحات -
تاریخ انتشار 2006