Two-loop triangle integrals with 4 scales for the $HZV$ vertex - INSPIRE

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Two-loop triangle integrals with 4 scales for the $HZV$ vertex

Yuxuan Wang
(
- Peking U. and
- Peking U., SKLNPT
)
,
Xiaofeng Xu
(
- Peking U. and
- Peking U., SKLNPT
)
,
Li Lin Yang
(
- Peking U. and
- Peking U., SKLNPT and
- CICQM, Beijing and
- Peking U., CHEP
)

May 27, 2019

5 pages

Published in:

Phys.Rev.D 100 (2019) 7, 071502

Published: Oct 19, 2019

e-Print:

1905.11463 [hep-ph]

DOI:

10.1103/PhysRevD.100.071502

View in:

ADS Abstract Service

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Abstract: (APS)

We calculate analytically the two-loop triangle integrals entering the O(ααs) corrections to the HZV vertex with V=Z*,γ* using the method of differential equations. Our result provides a prototype to study the analytic properties of multiloop multiscale Feynman integrals, and also allows fast numeric evaluation for phenomenological studies. We apply our results to the leptonic decay of the Higgs boson and to ZH production at electron-positron colliders. Besides the top quark loop, we include also the bottom quark loop contributions, whose evaluation takes a lot of time using purely numeric methods, but is very efficient with our analytic results.

Note:

5 pages, 4 figures

loop integral: 3
Higgs particle: leptonic decay
differential equations
analytic properties
electron positron
Feynman graph
quark

References(27)

Figures(4)

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