Status of the MSSM Higgs sector using global analysis and direct search bounds, and future prospects at the High Luminosity LHC

Abstract

In this paper, we search for the regions of the phenomenological minimal supersymmetric standard model (pMSSM) parameter space where one can expect to have moderate Higgs mixing angle (α) with relatively light (up to 600 GeV) additional Higgses after satisfying the current LHC data. We perform a global fit analysis using most updated data (till December 2014) from the LHC and Tevatron experiments. The constraints coming from the precision measurements of the rare b-decays B s → µ + µ − and b → sγ are also considered. We find that low M A ( 350) and high tan β ( 25) regions are disfavored by the combined effect of the global analysis and flavour data. However, regions with Higgs mixing angle α ∼ 0.1 -0.8 are still allowed by the current data. We then study the existing direct search bounds on the heavy scalar/pseudoscalar (H/A) and charged Higgs boson (H ± ) masses and branchings at the LHC. It has been found that regions with low to moderate values of tan β with light additional Higgses (mass ≤ 600 GeV) are unconstrained by the data, while the regions with tan β > 20 are excluded considering the direct search bounds by the LHC-8 data. The possibility to probe the region with tan β ≤ 20 at the high luminosity run of LHC are also discussed, giving special attention to the H → hh, H/A → tt and H/A → τ + τ − decay modes.

The light and heavy Higgs interpretation of the MSSM

“…That is, Z 6 is suppressed by less than one order of magnitude relative to Z 1 . 24 In the case where H is SM-like, values between 0 and 0.2 are found for |Z 6 /Z 1 |, with the best-fit value of |Z 6 /Z 1 | 0.1. In both the light and heavy Higgs case, the values of |Z 6 | in the regions of approximate alignment without decoupling are not unnaturally small.…”

“…[17,18]. Focusing on the MSSM, recent fits have shown that the interpretation of the observed scalar as the light CP-even MSSM Higgs boson ("light Higgs case") is a viable possibility, providing a very good description of all data [19][20][21][22][23][24]; see also Refs. [25][26][27] for global fits including also astrophysical data.…”

A global fit of the MSSM with GAMBIT

“…Most notably it stabilises the electroweak scale [2][3][4][5][6] with respect to large corrections from new physics at the Planck scale [7][8][9][10][11], allows the unification of gauge couplings [12][13][14][15], provides a dark matter (DM) candidate that can fit the observed relic abundance [16,17] and predicts a light Higgs boson, in accordance with the 2012 discovery [18,19]. This has prompted a vast number of investigations of this model, with recent literature studying precision corrections to the Higgs mass [20][21][22][23][24][25][26][27][28][29] and other aspects of Higgs physics [30][31][32][33][34][35][36][37][38][39][40], DM , the matter-antimatter asymmetry of the Universe [79][80][81], vacuum stability [82], cosmic inflation [83][84][...…”

Exploring non-holomorphic soft terms in the framework of gauge mediated supersymmetry breaking

“…All the above effects in combination may potentially cause very distinct outcomes in global analyses of low energy SUSY models [84][85][86][87]. In a model-dependent standpoint, one finds that such NH soft terms may arise out of interactions like [71].…”