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  Two-Loop QCD Helicity Amplitudes for Higgs Production Associated with a Vector Boson through Bottom Quark Annihilation

Ahmed, T., Ajjath, A., Chen, L., Dhani, P. K., Mukherjee, P., & Ravindran, V. (2019). Two-Loop QCD Helicity Amplitudes for Higgs Production Associated with a Vector Boson through Bottom Quark Annihilation. Proceedings of Science, 010.

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 Creators:
Ahmed, Taushif1, Author
Ajjath, A.H.1, Author
Chen, Long1, Author
Dhani, Prasanna K.1, Author
Mukherjee, Pooja1, Author
Ravindran, V.1, Author
Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650              

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Free keywords: Phenomenology of High Energy Physics
 Abstract: We present the two-loop QCD corrections to the amplitude of the Higgs production associated with a $Z$ boson via the bottom quark-antiquark annihilation channel with a non-vanishing bottom-quark Yukawa coupling. The computation is performed by projecting the D-dimensional scattering amplitude directly onto a set of Lorentz structures related to the linear polarisation states of the $Z$ boson. We cross-check the finite remainders through a computation based on conventional form factor decomposition. We show that for physical observables, an ultimate D-dimensional form factor decomposition of amplitudes is not necessary which has a huge potential to simplify a multiloop computation. We compute numerically the resulting cross sections under the soft-virtual approximation to NNLO and find it three orders of magnitude smaller than that of the s-channel.

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 Dates: 2019
 Publication Status: Issued
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Title: Proceedings of Science
  Abbreviation : PoS
Source Genre: Journal
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 010 Identifier: -

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Title: RADCOR2019
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 010 Identifier: -