A novel scenario in the semi-constrained NMSSM
- PDF / 4,870,245 Bytes
- 25 Pages / 595.276 x 841.89 pts (A4) Page_size
- 47 Downloads / 159 Views
Springer
Received: February Revised: April Accepted: May Published: June
19, 30, 23, 10,
2020 2020 2020 2020
Kun Wang and Jingya Zhu1 Center for Theoretical Physics, School of Physics and Technology, Wuhan University, Wuhan 430072, China
E-mail: [email protected], [email protected] Abstract: In this work, we develop a novel efficient scan method, combining the Heuristically Search (HS) and the Generative Adversarial Network (GAN), where the HS can shift marginal samples to perfect samples, and the GAN can generate a huge amount of recommended samples from noise in a short time. With this efficient method, we find a new scenario in the semi-constrained Next-to Minimal Supersymmetric Standard Model (scNMSSM), or NMSSM with non-universal Higgs masses. In this scenario, (i) Both muon g-2 and right relic density can be satisfied, along with the high mass bound of gluino, etc. As far as we know, that had not been realized in the scNMSSM before this work. (ii) With the right relic density, the lightest neutralinos are singlino-dominated, and can be as light as 0-12 GeV. (iii) The future direct detections XENONnT and LUX-ZEPLIN (LZ-7 2T) can give strong constraints to this scenario. (iv) The current indirect constraints to Higgs invisible decay h2 → χ ˜01 χ ˜01 are weak, but the direct detection of Higgs invisible decay at the future HL-LHC may cover half of the samples, and that of the CEPC may cover most. (v) The branching ratio of Higgs exotic decay h2 → h1 h1 , a1 a1 can be over 20 percent, while their contributions (h2 → 4χ ˜01 ) to the invisible decay are very small. Keywords: Supersymmetry Phenomenology ArXiv ePrint: 2002.05554
1
Corresponding author.
c The Authors. Open Access, Article funded by SCOAP3 .
https://doi.org/10.1007/JHEP06(2020)078
JHEP06(2020)078
A novel scenario in the semi-constrained NMSSM
Contents 1
2 The 2.1 2.2 2.3
2 3 5 6
semi-constrained NMSSM and the search strategy The Higgs and electroweakinos sector of the scNMSSM The Heuristically Search (HS) The Generative Adversarial Network (GAN)
3 Results and discussions 3.1 Scan with HS and GAN 3.2 Light dark matter (DM) and Higgs invisible decay
8 8 12
4 Conclusions
18
1
Introduction
Higgs boson was discovered in 2012 [1, 2], and its production rate in most channels coincides with the Standard Model (SM) prediction considering uncertainties [3–5]. While there are still chances for physics beyond the SM. For example, for the branching ratio of Higgs boson invisible decay, the current excluding limits are only 26% by ATLAS [6] and 19% by CMS [7], with all data at Run I and data of about 36 fb−1 at Run II. Supersymmetry is a popular theory beyond the SM, which introduces a new internal symmetry between fermions and bosons. Thus the large hierarchy problem can be solved, gauge coupling can be unified, and dark matter (DM) candidates can be provided, etc. In the Minimal Supersymmetric Standard Model (MSSM) with 7 free parameters at the electroweak scale, a SM-like 125 GeV Higgs can be afforded, but need large fine-tuning, and the bra
Data Loading...
