scholarly journals Constraints on H± Parameter Space in 2HDM at $\sqrt {s}=$ 8 TeV and $\sqrt {s}=$ 13 TeV

2020 ◽  
Vol 59 (10) ◽  
pp. 3189-3205
Author(s):  
Ijaz Ahmed ◽  
Murad Badshah ◽  
Nadia Kausar
Keyword(s):  
2015 ◽  
Vol 2015 ◽  
pp. 1-24 ◽  
Author(s):  
Andreas Redelbach

Searches for supersymmetry (SUSY) at the LHC frequently assume the conservation ofR-parity in their design, optimization, and interpretation. In the case thatR-parity is not conserved, constraints on SUSY particle masses tend to be weakened with respect toR-parity-conserving models. We review the current status of searches forR-parity-violating (RPV) supersymmetry models at the ATLAS and CMS experiments, limited to 8 TeV search results published or submitted for publication as of the end of March 2015. All forms of renormalisable RPV terms leading to prompt signatures have been considered in the set of analyses under review. Discussing results for searches for promptR-parity-violating SUSY signatures summarizes the main constraints for various RPV models from LHC Run I and also defines the basis for promising signal regions to be optimized for Run II. In addition to identifying highly constrained regions from existing searches, also gaps in the coverage of the parameter space of RPV SUSY are outlined.


2019 ◽  
Vol 79 (11) ◽  
Author(s):  
Prasenjit Sanyal

Abstract The latest CMS results on the upper limits on $$\sigma _{H^\pm }$$σH±BR($$H^\pm \rightarrow \tau ^\pm \nu )$$H±→τ±ν) and $$\sigma _{H^\pm }$$σH±BR($$H^+ \rightarrow t{\bar{b}}$$H+→tb¯) for $$\sqrt{s}=13$$s=13 TeV at an integrated luminosity of 35.9 $$\hbox {fb}^{-1}$$fb-1 are used to impose constraints on the charged Higgs $$H^\pm $$H± parameters within the Two Higgs Doublet Model (2HDM). The 2HDM is the simplest extension of the Standard Model (SM) under the same gauge symmetry to contain charged Higgs and is relatively little constrained compared to the Minimal Supersymmetric Standard Model (MSSM). The latest results lead to much more stringent constraints on the charged Higgs parameter space than for the earlier 8 TeV results. The CMS collaboration also studied the exotic bosonic decays $$H^\pm \rightarrow W^\pm A$$H±→W±A and $$A \rightarrow \mu ^+ \mu ^-$$A→μ+μ- for the first time and put upper limits on the BR($$t\rightarrow H^+ b$$t→H+b) for the light charged Higgs boson. These constraints lead to the exclusion of parameter space which is not excluded by the $$\tau \nu $$τν channel. For comparison the exclusion regions from flavor physics constraints are also discussed.


2017 ◽  
Vol 32 (02n03) ◽  
pp. 1750014
Author(s):  
Ran Ding ◽  
Li Huang ◽  
Tianjun Li ◽  
Bin Zhu

We propose a supersymmetric explanation of the diphoton excess in the Minimal Supersymmetric Standard Model (MSSM) with the leptonic R-parity violation. In our model, sneutrino serves as the 750 GeV resonance and produced through quark–antiquark annihilation. With introducing appropriate trilinear soft parameters, we show that the diphoton branching ratio is significantly enhanced compared with the conventional MSSM. For current dijet and W-pair LHC constraints, we can successfully fit the observed diphoton signal rate in sizeable parameter regions, the resulting parameter space strongly favor the masses of light smuon and stau within the range from 375–500 GeV, which depends on the choice of electroweakino masses and soft trilinear terms. While after taking into account the compatibility of diphoton excess between the 8 TeV and 13 TeV LHC, only the coupling involved with the second generation quarks is survived. In this case, the corresponding parameter space favors a narrow mass range of smuon and stau with [Formula: see text]. Even if the 750 GeV diphoton excesses were not confirmed by the ATLAS and CMS experiments, we point out that our proposal can still be used to explain the current and future tentative diphoton excesses.


2011 ◽  
Vol 8 (1) ◽  
pp. 65-73
Author(s):  
E.Sh. Nasibullaeva ◽  
I.Sh. Akhatov

The mathematical model of a bubble cluster subjected to an acoustic field is investigated. In this model the cluster is considered as a large drop containing a liquid and a set of microbubbles. Areas of applicability of the mathematical model of the bubble cluster in the parameter space (α, R_0) are constructed, where α is the bubble concentration in the cluster; R_0 is the initial radius of the cluster.


2019 ◽  
Vol 22 (1) ◽  
pp. 6-17 ◽  
Author(s):  
Elisabeth Reinhardt ◽  
Ahmed M. Salaheldin ◽  
Monica Distaso ◽  
Doris Segets ◽  
Wolfgang Peukert

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