Jan 10 – 14, 2022
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Resummed Higgs boson cross section at next-to SV to NNLO+$ \rm \overline {\textbf{NNLL}}$

Jan 10, 2022, 4:32 PM
1m
Online only

Online only

Poster Standard Model Precision SM Measurements

Speaker

Surabhi Tiwari (Institute of Mathematical Sciences)

Description

We present the resummed predictions for inclusive cross-section for the production of Higgs boson
at next-to-next-to leading logarithmic ($\rm \overline {NNLL}$) accuracy taking into account both soft-virtual ($\rm SV$) and next-to SV ($\rm NSV$) threshold logarithms. We derive the $N$-dependent coefficients and the $N$-independent constants in Mellin-$N$ space for our study. We match the resummed result through the framework of minimal prescription with the fixed order results. We report in detail the numerical impact of $N$-independent part of resummed result and explore the ambiguity involved in exponentiating them. By studying the K factors at different logarithmic accuracy from resummed $\rm SV+ NSV$ logarithms we find that the perturbative expansion shows better convergence improving the reliability of the prediction at $\rm NNLO + \overline{NNLL}$ accuracy. We also observe that the resummed $\rm SV + NSV$ result improves the renormalisation scale uncertainty at every order in perturbation theory. The uncertainty from the renormalisation scale $\mu_R$ ranges between $(+8.85\% ,-10.12\%)$ at $\rm NNLO$ whereas it goes down to $(+6.54\% , - 8.32\%)$ at $\rm NNLO + \overline{NNLL}$ accuracy. However, the factorisation scale uncertainty is worsened by the inclusion of these NSV logarithms hinting the importance of resumming beyond $\rm NSV$ terms. We also present our predictions for $\rm SV + NSV$ resummed result at different collider energies.

Primary author

Surabhi Tiwari (Institute of Mathematical Sciences)

Co-authors

Ajjath A.H (IMSc,Chennai) Pooja Mukherjee (IMSc,Chennai) Vajravelu Ravindran (Harish-Chandra Research Institute) Aparna Sankar (IMSc, Chennai)

Presentation materials