5-9 October 2020
Online
Europe/Moscow timezone
The conference is over. We would like to thank all participants for their attendance!

On perturbative unitarity in an extended MSSM Higgs sector

6 Oct 2020, 17:20
15m
HEP Theory (Zoom)

HEP Theory

Zoom

https://zoom.us/j/91215148608
Oral talk HEP theory HEP theory

Speaker

Elena Fedotova (SINP MSU)

Description

The MSSM Higgs sector extended by dimension-six operators $U^{(6)}$ [1], which are loop contributions in a Coleman-Weinberg-type potential, is considered. The presence of such additional contributions allows reopening phenomenological MSSM scenarios [2] closed in previous analyses.
In order to restrict corresponding parameter space, perturbative unitarity constraints must be satisfied.
The common approach for checking this is to consider a two-particle scattering
matrix of scalars in the large center-of-mass energy $\sqrt{s}$ limit where only point interactions contribute [3].
However, due to SUSY-particles interactions in MSSM,
trilinear couplings can be significant and
large contributions are present
at smaller $\sqrt{s}$ [4].
We find the analytical formula for quartic and cubic couplings for the Higgs potential extended by dimension-six operators,
compare results with loop corrected constraints, which use the large $\sqrt{s}$ approximation with and without additional $U^{(6)}$-contributions, and
show how the allowed regions in the parameter space are affected in these cases.

  1. M. N. Dubinin and E. Yu. Petrova, Phys. Rev. D 95, 055021 (2017).
  2. M. N. Dubinin and E. Yu. Petrova, Int. J. Mod. Phys. A 33, 1850150 (2018); 1908.05223 [hep-ph].
  3. B. W. Lee, C. Quigg, and H. B. Thacker, Phys. Rev. D 16, 1519 (1977); I. F. Ginzburg and I. P. Ivanov, Phys. Rev. D 72, 115010 (2005); A. G. Akeroyd, A. Arhrib, and E. Naimi, Phys. Lett. B 490, 119 (2000).
  4. M. D. Goodsell and F. Staub, Eur. Phys. J. C 78, 649 (2018); M. E. Krauss and F. Staub, Phys.Rev. D98, no.1, 015041 (2018).

Primary author

Elena Fedotova (SINP MSU)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×