29 November 2021 to 3 December 2021
Virtual and IBS Science Culture Center, Daejeon, South Korea
Asia/Seoul timezone

The Higgs plus three-gluon amplitude at one loop with pySecDec

contribution ID 611
2 Dec 2021, 11:20
20m
S305 (Virtual and IBS Science Culture Center)

S305

Virtual and IBS Science Culture Center

55 EXPO-ro Yuseong-gu Daejeon, South Korea email: library@ibs.re.kr +82 42 878 8299
Oral Track 3: Computations in Theoretical Physics: Techniques and Methods Track 3: Computations in Theoretical Physics: Techniques and Methods

Speaker

Chaitanya Paranjape (IIT Dhanbad)

Description

We present an application of major new features of the program pySecDec, which is a program to calculate parametric integrals, in particular multi-loop integrals, numerically.
One important new feature is the ability to integrate weighted sums of integrals in a way which is optimised to reach a given accuracy goal on the sums rather than on the individual integrals, another one is the option to perform asymptotic expansions.
These new assets of the program represent an important step towards the efficient evaluation of multi-loop amplitudes in a largely automated way. The poster will illustrate them in a pedagogical example, through the calculation of the one-loop amplitude for Higgs plus jet production in the gluon channel, mediated by a top quark loop. Numerical results in the heavy top limit, which can also be obtained with the new version of pySecDec, will be shown as well.

References

https://arxiv.org/abs/2108.10807,
https://github.com/gudrunhe/secdec

Significance

Illustrates important new features of the program pySecDec in a physics application which is simple enough to teach new users of the program how to use it for multi-loop applications.

Speaker time zone Compatible with Asia

Primary author

Chaitanya Paranjape (IIT Dhanbad)

Co-authors

Gudrun Heinrich (KIT) Stephen Philip Jones (University of Durham (GB))

Presentation materials