scholarly journals Analytic results for massless three-loop form factors

2010 ◽  
Vol 2010 (4) ◽  
Author(s):  
R. N. Lee ◽  
A. V. Smirnov ◽  
V. A. Smirnov
Keyword(s):  
Form Factors ◽  
Loop Form

scholarly journals Three loop form factors of a massive spin-2 particle with nonuniversal coupling

2017 ◽  
Vol 95 (3) ◽  
Author(s):  
Taushif Ahmed ◽  
Pulak Banerjee ◽  
Prasanna K. Dhani ◽  
Prakash Mathews ◽  
Narayan Rana ◽  
...  
Keyword(s):  
Form Factors ◽  
Massive Spin ◽  
Loop Form

scholarly journals Hypergeometric presentation for one-loop contributing to H → Z γ

2020 ◽  
Vol 2020 (5) ◽  
Author(s):  
Khiem Hong Phan ◽  
Dzung Tri Tran
Keyword(s):  
Hypergeometric Functions ◽  
Decay Channel ◽  
Form Factors ◽  
Space Time ◽  
Decay Process ◽  
Time Dimension ◽  
Higgs Decay ◽  
Arbitrary Space ◽  
First Time ◽  
Loop Form

Abstract In this paper, new analytic formulas for one-loop contributing to Higgs decay channel $H \rightarrow Z\gamma$ are presented in terms of hypergeometric functions. The calculations are performed by following the technique for tensor one-loop reduction developed in [A. I. Davydychev, Phys. Lett. B 263 (1991) 107]. For the first time, one-loop form factors for the decay process are shown which are valid at arbitrary space–time dimension $d$.

scholarly journals Two-loop form factors in QED

2003 ◽  
Vol 664 (1-2) ◽  
pp. 341-356 ◽  
Author(s):  
P. Mastrolia ◽  
E. Remiddi
Keyword(s):  
Form Factors ◽  
Loop Form

scholarly journals One-loop Form Factors for \(H\rightarrow \gamma^*\gamma^*\) in \(R_{\xi}\) Gauge

2021 ◽  
Vol 32 ◽  
Author(s):  
Khiem Hong Phan ◽  
Dzung Tri Tran
Keyword(s):  
Standard Model ◽  
Form Factors ◽  
Numerical Results ◽  
Good Stability ◽  
Charged Scalar ◽  
Scalar Particles ◽  
Standard Models ◽  
Loop Form

In this paper, we present general one-loop form factors for \(H\rightarrow \gamma^* \gamma^*\) in \(R_{\xi}\) gauge, considering all cases of two on-shell, one on-shell and two off-shell for final photons. The calculations are performed in standard model and in arbitrary beyond the standard models which charged scalar particles may be exchanged in one-loop diagrams. Analytic results for the form factors are shown in general forms which are expressed in terms of the Passarino-Veltman functions. We also confirm the results in previous computations which are available for the case of two on-shell photons. The \(\xi\)-independent of the result is also discussed. We find that numerical results are good stability with varying \(\xi=0,1\) and $\xi\rightarrow \infty\).

scholarly journals nf2 contributions to fermionic four-loop form factors

2017 ◽  
Vol 96 (1) ◽  
Author(s):  
Roman N. Lee ◽  
Alexander V. Smirnov ◽  
Vladimir A. Smirnov ◽  
Matthias Steinhauser
Keyword(s):  
Form Factors ◽  
Loop Form

scholarly journals Analytic two-loop form factors in $ \mathcal{N} = 4 $ SYM

2012 ◽  
Vol 2012 (5) ◽  
Author(s):  
Andreas Brandhuber ◽  
Gabriele Travaglini ◽  
Gang Yang
Keyword(s):  
Form Factors ◽  
Loop Form
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