E 6 motivated UMSSM confronts experimental data
- PDF / 4,427,130 Bytes
- 23 Pages / 595.276 x 841.89 pts (A4) Page_size
- 58 Downloads / 189 Views
Springer
Received: April 9, Revised: April 22, Accepted: May 7, Published: May 25,
2020 2020 2020 2020
a ¨ ¨ Mariana Frank,a Ya¸sar Hi¸cyılmaz,b,c Stefano Morettib and Ozer Ozdal a
Department of Physics, Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec H4B 1R6, Canada b School of Physics & Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, U.K. c Department of Physics, Balıkesir University, TR10145, Balıkesir, Turkey
E-mail: [email protected], [email protected], [email protected], [email protected] Abstract: We test E6 realisations of a generic U(1)0 extended Minimal Supersymmetric Standard Model (UMSSM), parametrised in terms of the mixing angle pertaining to the new U(1)0 sector, θE6 , against all currently available data, from space to ground experiments, from low to high energies. We find that experimental constraints are very restrictive and indicate that large gauge kinetic mixing and θE6 ≈ −π/3 are required within this theoretical construct to achieve compliance with current data. The consequences are twofold. On the one hand, large gauge kinetic mixing implies that the Z 0 boson emerging from the breaking of the additional U(1)0 symmetry is rather wide since it decays mainly into W W pairs. On the other hand, the preferred θE6 value calls for a rather specific E6 breaking pattern different from those commonly studied. We finally delineate potential signatures of the emerging UMSSM scenario in both Large Hadron Collider (LHC) and in Dark Matter (DM) experiments. Keywords: Supersymmetry Phenomenology ArXiv ePrint: 2004.01415
c The Authors. Open Access, Article funded by SCOAP3 .
https://doi.org/10.1007/JHEP05(2020)123
JHEP05(2020)123
E6 motivated UMSSM confronts experimental data
Contents 1
2 Model description
2
3 Scanning procedure and experimental constraints
7
4 Mass spectrum and dark matter
9
5 Summary and conclusion
1
15
Introduction
After the observation of a Standard Model (SM)-like Higgs boson by ATLAS [1] and CMS [2] in 2012, almost all ongoing and planned observational or collider experiments have been concentrating on searching for New Physics (NP). Undoubtedly, Supersymmetry (SUSY) is one of the most studied NP theories at these experiments, since it has remarkable advantages. In SUSY theories, the stability problem of the hierarchy between the Electro-Weak (EW) and Planck scales is solved by introducing new particles, differing by half a spin unit from the SM ones, thereby onsetting a natural cancellation between otherwise divergent boson and fermion loops in a Higgs mass or self-coupling. Furthermore, since it relates the latter to the strength of the gauge boson couplings, SUSY predicts a naturally light Higgs boson in its spectrum, indeed compatible with the discovered 125 GeV Higgs boson. Also, SUSY is able to generate dynamically the Higgs potential required for EW Symmetry Breaking (EWSB), which is instead enforced by hand in the SM. Finally, another significant motivation for SUSY is the natural Weakly Interacti
Data Loading...
