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SANCscope -- v.1.00

A. Andonov, A. Arbuzov, D. Bardin, S. Bondarenko, P. Christova, L. Kalinovskaya, G. Nanava, W. von Schlippe

TL;DR

SANCscope provides automated $1\text{-}loop$ radiative corrections in the Standard Model for processes with up to $4$ external legs, delivering UV-finite scalar form factors $FF$ and helicity amplitudes $HA$ and including soft-photon bremsstrahlung to manage IR singularities. The framework uses a covariant amplitude basis organized into a three-level pipeline: analytic precomputation, symbol-to-number conversion, and Monte Carlo generation, enabling end-to-end predictions from SM Lagrangian to event distributions. It presents detailed amplitudes and form factors for a broad set of $3$- and $4$-leg processes in QED, QCD, and EW, including Bhabha scattering and $ffbb\to0$ channels, along with a comprehensive precomputation tree and cross-validation against other tools. By providing public servers and an educationally oriented interface, SANCscope aims to be a practical, high-precision tool for collider phenomenology at current and future experiments.

Abstract

In this article we have summarized the status of the system SANC version 1.00. We have implemented theoretical predictions for many high energy interactions of fundamental particles at the one-loop precision level for up to 4-particle processes. In the present part of our SANC description we place emphasis on an extensive discussion of an important first step of calculations of the one-loop amplitudes of 3- and 4-particle processes in QED, QCD and EW theories. SANC version v1.00 is accessible from servers at Dubna http://sanc.jinr.ru/ (159.93.74.10) and CERN http://pcphsanc.cern.ch/ (137.138.180.42)

SANCscope -- v.1.00

TL;DR

SANCscope provides automated radiative corrections in the Standard Model for processes with up to external legs, delivering UV-finite scalar form factors and helicity amplitudes and including soft-photon bremsstrahlung to manage IR singularities. The framework uses a covariant amplitude basis organized into a three-level pipeline: analytic precomputation, symbol-to-number conversion, and Monte Carlo generation, enabling end-to-end predictions from SM Lagrangian to event distributions. It presents detailed amplitudes and form factors for a broad set of - and -leg processes in QED, QCD, and EW, including Bhabha scattering and channels, along with a comprehensive precomputation tree and cross-validation against other tools. By providing public servers and an educationally oriented interface, SANCscope aims to be a practical, high-precision tool for collider phenomenology at current and future experiments.

Abstract

In this article we have summarized the status of the system SANC version 1.00. We have implemented theoretical predictions for many high energy interactions of fundamental particles at the one-loop precision level for up to 4-particle processes. In the present part of our SANC description we place emphasis on an extensive discussion of an important first step of calculations of the one-loop amplitudes of 3- and 4-particle processes in QED, QCD and EW theories. SANC version v1.00 is accessible from servers at Dubna http://sanc.jinr.ru/ (159.93.74.10) and CERN http://pcphsanc.cern.ch/ (137.138.180.42)

Paper Structure

This paper contains 11 sections, 21 equations, 1 figure.

Table of Contents

  1. Introduction
  2. Amplitude Basis, Scalar Form Factors, Helicity Amplitudes
  3. Introduction
  4. The 3-leg processes ${\boldmath B(Q)\to f(p_1)+\bar{f}(p_2)}$
  5. The 3-leg processes $B(Q)\to V(p_1)+V(p_2),~~V=\gamma, Z, W$
  6. The 4-leg NC processes $f_1\bar{f}_1\to(\gamma Z)\to f\bar{f}$
  7. The 4-leg CC processes $f_1\bar{f}'_1\to(W)\to f\bar{f'}$
  8. Bhabha scattering
  9. $ffbb\to 0$ processes
  10. Precomputation
  11. Introduction

Figures (1)

  • Figure 1: $f_1\bar{f}_1\to f\bar{f}$ process.