197424879
1994 status report RD9: A Demonstrator analog signal processing circuit in a radiation hard SOI-CMOS technology
80725226
Differences in the radiosensitivity of male germ cells determined in various strains of mice
119249635
ABJM amplitudes and WL at finite N
A bstractWe evaluate ABJM observables at two loops, for any value of the rank N of the gauge group. We compute the color subleading contributions to the four-point scattering amplitude in ABJM at two loops. Contrary to the four dimensional case, IR divergent N-subleading contributions are proportional to leading poles in the regularization parameter. We then exploit the non-planar calculation for the amplitude to derive an expression for the two-loop Sudakov form factor at any N. In the planar limit the result coincides with the one recently obtained in literature by using Feynman diagrams and unitarity. Finally, we analyze the subleading contributions to the light-like four-cusps Wilson loop and interpret the result in terms of the non-abelian exponentiation theorem. All these perturbative results satisfy the uniform transcendentality principle, hinting at its validity in ABJM beyond the planar limit.
14317609
String predictions for near future colliders from one-loop scattering amplitudes around D-brane worlds
We derive compact expressions for one-loop scattering amplitudes of four open-string vector bosons around supersymmetric configurations with intersecting or magnetized D-branes on toroidal orbifolds. We check the validity of our formulae against the structure of their singularities and their behaviour under modular transformations to the transverse channel, exposing closed string exchange. We then specialize to the case of forward scattering and compute the total cross section for two massless open string vector bosons on the brane to decay into closed strings in the bulk, relying on the optical theorem. Although not directly related to collider signatures our predictions represent a step forward towards unveiling phenomenological implications of open and unoriented superstrings.
6821869
Duality symmetries in string theory
We review the status of duality symmetries in superstring theories. These discrete symmetries mark the striking differences between theories of pointlike objects and theories of extended objects. They prove to be very helpful in understanding non-perturbative effects in string theories. We will also briefly discuss the strange role played by open strings and their solitons in the emerging scenario.
123407983
On the ADHM construction on ALE gravitational backgrounds
Abstract In this letter we report on the explicit construction of self-dual connections on Asymptotically Locally Euclidean spaces following the approach of Kronheimer and Nakajima. Restricting ourselves to the simplest case of an SU (2) connection with the lowest Chern class on the Eguchi-Hanson gravitational background, we study the wave operators for scalar, spinor and vector fields in the adjoint representation of the gauge group and verify that the metric on the moduli space coincides with the metric on the base manifold.
54031010
Two-loop cusp anomaly in ABJM at strong coupling
A bstractWe compute the null cusp anomalous dimension of ABJM theory at strong coupling up to two-loop order. This is done by evaluating corrections to the corresponding superstring partition function, weighted by the AdS4 × ℂℙ3 action in AdS light-cone gauge. We compare our result, where we use an anomalous shift in the AdS4 radius, with the cusp anomaly of N$$ \mathcal{N} $$ = 4 SYM, and extract the two-loop contribution to the non-trivial integrable coupling h(λ) of ABJM theory. It coincides with the strong coupling expansion of the exact expression for h(λ) recently conjectured by Gromov and Sizov. Our work provides thus a non-trivial perturbative check for the latter, as well as evidence for two-loop UV-finiteness and quantum integrability of the Type IIA AdS4 × ℂℙ3 superstring in this gauge.