Conveners
Supersymmetry: Models, Phenomenology and Experimental Results
- Carlos E.M. Wagner (University of Chicago)
Supersymmetry: Models, Phenomenology and Experimental Results
- Jia Liu (Peking University)
Supersymmetry: Models, Phenomenology and Experimental Results
- Stefan Guindon (CERN)
Supersymmetry: Models, Phenomenology and Experimental Results
- Xiaoping Wang (Beihang University)
Supersymmetry: Models, Phenomenology and Experimental Results
- Iacopo Vivarelli (University of Sussex (GB))
Supersymmetry: Models, Phenomenology and Experimental Results
- Hao Zhang (Theoretical Division, Institute of High Energy Physics, Chinese Academy of Sciences)
Supersymmetry: Models, Phenomenology and Experimental Results
- Iacopo Vivarelli (University of Sussex (GB))
Supersymmetry: Models, Phenomenology and Experimental Results
- Lei Wu (Nanjing Normal University)
Supersymmetry: Models, Phenomenology and Experimental Results
- Stefan Guindon (CERN)
Supersymmetry: Models, Phenomenology and Experimental Results
- Andrew Fowlie (Nanjing Normal University)
Supersymmetry: Models, Phenomenology and Experimental Results
- Bhujyo Bhattacharya
We explain how the landscape can make predictions for Higgs and sparticle masses.
A power-law draw to large soft terms coupled with the ABDS anthropic condition that he derived weak scale be within a factor of a few of our measured value leads to m(h)~125 GeV with sparticles above present LHC limits. The spectra that emerges is that of radiatively driven natural SUSY. We show why such natural...
We consider an explicit effective field theory example based on the Bousso-Polchinski framework with a large number N of hidden sectors contributing to supersymmetry breaking. Each contribution comes from four form quantized fluxes, multiplied by random couplings. The soft terms in the observable sector in this case become random variables, with mean values and standard deviations which are...
String theory has no parameter except the string scale $M_S$, so the Planck scale $M_\text{Pl}$, the supersymmetry-breaking scale $m_{\rm susy}$, the electroweak scale $m_\text{EW}$ as well as the vacuum energy density (cosmological constant) $\Lambda$ are to be determined dynamically at any local minimum solution in the string theory landscape. Here we consider a model that links the...
We perform an analysis of the vacuum stability of the neutral scalar potential of the $\mu$-from-$\nu$ Supersymmetric Standard Model ($\mu\nu$SSM). As an example scenario, we discuss the alignment without decoupling limit of the $\mu\nu$SSM. We demonstrate that in this limit large parts of the parameter space feature unphysical minima that are deeper than the electroweak minimum. In order to...
Based on 3 papers: arXiv:2002.05554, 2003.01662, 2011.12848
1.“A Novel Scenario in the Semi-constrained NMSSM,” JHEP 06, 078 (2020)
2.“Funnel annihilations of light dark matter and the invisible decay of the Higgs boson,”Phys. Rev. D 101, no.9, 095028 (2020)
3. “Higgsino Asymmetry and Direct-Detection Constraints of Light Dark Matter in the NMSSM with Non-Universal Higgs Masses,” Chin. Phys....
We will consider the proton decay in a class of minimal SU(5) GUTs mediated by color-triplets Higgsinos. Even though their masses are comparable with the GUT scale, they can still yield a shorter lifetime for the proton, especially in the low tan beta region. In this work, we consider several threshold effects from Planck-suppressed operators, which lead to heavier triplet Higgsinos as well as...
Results from the CMS experiment are presented for searches for strong supersymmetric with decays to hadronic final states. The searches use proton-proton collision data with luminosity up to 137 fb-1 recorded by the CMS detector at center of mass energy 13 TeV during the LHC Run 2.
Despite the absence of experimental evidence, weak-scale supersymmetry remains one of the best motivated and studied Standard Model extensions. This talk summarizes recent ATLAS results on inclusive searches for supersymmetric squarks of the first two generations and gluinos, focusing on decay modes in which R-parity is conserved and therefore the lightest SUSY particle is a stable dark matter...
Naturalness arguments for weak-scale supersymmetry favour supersymmetric partners of the third generation quarks with masses light enough to be produced at the LHC. The ATLAS experiment has a variety of analyses devoted to direct production of stops and sbottoms, exploiting novel reconstruction and analysis techniques. This talk presents recent results from these searches and their...
Results from the CMS experiment are presented for searches for supersymmetric stop and sbottom production. A variety of final state decays are considered with an emphasis on targeting difficult to reach kinematic regions. The searches use proton-proton collision data with luminosity up to 137 fb-1 recorded by the CMS detector at center of mass energy 13 TeV during the LHC Run 2
The direct pair-production of the tau-lepton super-partner, stau, is one of the most interesting channels to search for SUSY. First of all the stau is with high probability the lightest of the scalar leptons. Secondly the signature of stau pair production signal events is one of the most difficult ones, yielding to the 'worst' and so most global scenario for the searches. The current...
The Higgs boson mass has turned into a precision observable with an uncertainty of a few hundred MeV at the LHC and provides an important constraint on the parameter space of supersymmetric models. To have sensible limits, the experimental accuracy has to be matched by the precision of the theory predictions. Consequently, a tremendous effort has been put in the computation of the...
The Next-to-Minimal Supersymmetric extension of the Standard Model (NMSSM) including additionally six leptonic singlet superfields can explain the small active neutrinos masses via the inverse seesaw mechanism (ISS), while it still allows for large values of the neutrino Yukawa couplings with a mass scale of sterile neutrinos of order TeV. While $R$-parity is conserved in this model, lepton...
In light of the current situation that no direct sign of new particles has been observed so far,indirect searches of new particles become increasingly important.
Accurate theoretical predictions are inevitable in order to be able to indirectly find new physics and - in case of discovery - to identify the underlying model.
In this study, we calculated the full one-loop corrections to the...
I discuss the general Three-Higgs Doublet Model (3HDM) and identify all limits that lead to exact SM alignment. I focus on the most economic setting, called here the Maximally Symmetric Three-Higgs Doublet Model (MS-3HDM). The potential of the MS-3HDM obeys an Sp(6) symmetry, softly broken by bilinear masses and explicitly by hypercharge and Yukawa couplings through renormalisation-group...
Charginos and neutralinos are often the lightest new particles predicted by a wide range of supersymmetry models, and the lightest neutralino is a well motivated and studied candidate for dark matter in models with R-parity conservation. The small direct production cross sections of electroweakinos leads to difficult searches, despite relatively clean final states. This talk will highlight the...
In this talk, I will give an overview of the status and recent developments of FeynHiggs. Focusing on the calculation of the SM-like Higgs boson mass in the MSSM, I will highlight some of the recent improvements in the effective field theory calculation that are relevant for multi-scale hierarchies. I.e., I will discuss the case of a heavy gluino as well as the case of light non-SM-like Higgs...
Results from the CMS experiment are presented for electroweak production of supersymmetric partners with decays to leptonic final states. The searches use proton-proton collision data with luminosity up to 137 fb-1 recorded by the CMS detector at center of mass energy 13 TeV during the LHC Run 2.
Searches for electroweakinos light enough to be produced at the LHC are well motivated by consideration on dark matter, naturalness and the recently observed muon g-2 anomaly. This talk presents a search for electroweakinos in fully-hadronic final states to exploit the advantage of the large branching ratio, and the efficient background rejection by identifying the high-pT bosons using...
Results from the CMS experiment are presented for searches for supersymmetric particle production with tau leptons in the final state. The searches use proton-proton collision data with luminosity up to 137 fb-1 recorded by the CMS detector at center of mass energy 13 TeV during the LHC Run 2.
We explore the supersymmetric (susy) final states coming from MSSM Higgs decaying via neutralinos and charginos, collectively called electroweakinos. They give rise to mono-(h/Z) + missing energy final states. We consider backgrounds coming from Standard Model (SM) and susy processes. The susy backgrounds have not been considered in this kind of analysis earlier, which comes from direct...
The search for renormalization group invariant relations among parameters to all orders in perturbation theory constitutes the basis of the reduction of couplings concept. Reduction of couplings can be achieved in certain $N=1$ supersymmetric grand unified theories and few of them can even become finite at all loops. The resulting theories in which successful reduction of couplings has been...
A cluster of soft displaced tracks corresponds to the dark matter co-annihilation regime. The long-lived regime is, in particular, motivated by the unexplored top partner physics. The background in this regime is extremely challenging to model using a traditional simulation method. We demonstrate the feasibility of handling the formidable background using the CMS Open Data. We perform this...
We analyse NMSSM scenarios containing a singlino LSP dark matter. By systematically considering several NLSP compositions, we identify and classify regions of parameter space where NLSP exhibits a long lifetime due to suppressed couplings and leads to a displaced vertex signature at the colliders. We furthermore construct viable production and decay processes at the HL-LHC to search for such...
The disappearing track signature, which arises from the decay of a long-lived charged particle to a neutral particle and particles with momenta below the reconstruction thresholds, is characteristic of many well-motivated models for physics beyond the standard model, including anomaly mediated SUSY breaking models, natural models of SUSY with light higgsinos, and dark matter models with...
Various Supersymmetry (SUSY) scenarios, including split SUSY and anomaly or gravity-mediated SUSY-breaking scenarios, lead to signatures with long-lived particles. Searches for these processes may target either the long lived particle itself or its decay products at a significant distance from the collision point. These signatures provide interesting technical challenges due to their special...
Many supersymmetry models feature sleptons with masses below a TeV. Light sleptons can arise in well motivated dark matter models as well as proposed solutions to the observed anomalous muon magnetic moment. The talk presents recent ATLAS results from searches for slepton pair production in a variety of final states, including models in which R-parity is either conserved or violated, and...
Results from the CMS experiment are presented for supersymmetry searches targeting so-called compressed spectra. Those have small mass splittings between the different supersymmetric partners. Such a spectrum presents unique experimental challenges. This talk describes the new techniques utilized by CMS to address such difficult scenarios. The searches use proton-proton collision data with...
The lighter chargino is a prime candidate to be the next-to-lightest SUSY particle (the NLSP). Even if up to now data from the LHC have not shown evidence of SUSY, the complementary nature of physics with e+e- collisions still offers many interesting scenarios in which SUSY can be discovered at the ILC. In this contribution we present the capability of the ILC for excluding or, respectively,...
A highly bino-like Dark Matter (DM), which is the Lightest Supersymmetric Particle (LSP), could be motivated by the stringent upper bounds on the DM direct detection rates. This is especially so when its mass is around or below 100 GeV for which such a bound tends to get most severe. Requiring not so large a higgsino mass parameter, that would render the scenario reasonably 'natural',...
In Supersymmetry, the lightest neutralino turns out to be a promising WIMP dark matter(DM) candidate. In the Minimal Supersymmetric Standard Model(MSSM), a pure neutralino state can be a thermal DM if it has mass $\cal{O}$(1) TeV. So a WIMP dark matter(DM) of mass $\cal{O}$(100) GeV or less should be a "tempered neutralino". Taking into account current constraints from direct detection(DD)...
We study the possibility of measuring neutrino Yukawa couplings in the Next-to-Minimal Supersymmetric Standard Model supplemented with right-handed neutrinos (NMSSMr) when the lightest of such states is the Dark Matter (DM) candidate, by exploiting a `dijet + dilepton + Missing Transverse Energy' (MET) signature. We show that, contrary to the minimal realisation of Supersymmetry (SUSY), the...
In many theories dark matter is assumed to be a Majorana fermion, for which the anapole moment can induce an effective interaction with targets in direct detection experiments via the exchange of a virtual photon. In this talk, I will present the novel contribution to the anapole moment of a generic Majorana fermion due to vectors in the one-loop expression. For this, the diagrams are...
As the standard model of the Big Bang cosmology, the ΛCDM model can account for most observations of the Universe, especially on the large scale structure of the Universe.However, the predictions on small scale structures exist some anomalies:missing satellites, cusp vs core, too big to fail. The issues can be resolved if the DM has strong self-interactions with light mediator(o(1)Mev) where...
R-parity violation introduces many viable signatures to the search for supersymmetry at the LHC.The decay of supersymmetric particles can produce leptons or jets, while removing the missingtransverse momentum signal common to traditional supersymmetry searches. The talk presentsrecent results from searches of supersymmetry in these unusual signatures of R-parity violationwith the CMS detector.
R-parity-violating (RPV) SUSY models are well motivated theories, with fewer experimental constraints than many R-parity-conserving models, and allow for more natural supersymmetric mass spectra. This talk presents the latest result for a search for RPV SUSY in final states with at least one lepton and high number of jets, several of which may be b-jets. The analysis follows a general approach...
Supersymmetry models in which R-parity violation occurs predict a wide range of experimental signatures at the LHC, including many high-multiplicity final states without large missing transverse momentum. These models are motivated by the hierarchy problem and for some parameters naturally explain the lightness of the standard model neutrinos. Searches for RPV SUSY signatures require dedicated...
We confront the Minimal Supersymmetric Standard Model (MSSM) with the recent measurement of (g-2)_mu, the Dark Matter (DM) relic density, DM direct detection limits and electroweak SUSY searches at the LHC. We demonstrate that various distinct regions of the parameter space can fulfill all experimental constraints. We present predictions for future pp and e+e- colliders to explore these regions.
Hierarchical masses of quarks and leptons are addressed by imposing horizontal symmetries. In supersymmetric Standard Models, the same symmetries play a role in suppressing flavor violating processes induced by supersymmetric particles. Combining the idea of spontaneous CP violation to control contributions to electric dipole moments, the mass scale of supersymmetric particles can be...
In April the Fermilab Muon $g-2$ experiment reported its first measurement of the muon g-2, which is in full agreement with the previous BNL measurement and pushes the world average deviation from the Standard Model to a significance of $4.2\sigma$.
We provide an extensive survey of its impact on beyond the Standard Model physics. We compute predictions for g-2, dark...
Gluino-SUGRA ($\tilde g$SUGRA), which is an economical extension of mSUGRA, adopts much heavier gluino mass parameter than other gauginos mass parameters and universal scalar mass parameter at the unification scale. It can elegantly reconcile the experimental results on the Higgs boson mass, the muon $g-2$, the null results in search for supersymmetry at the LHC and the results from...
We present analytical one-loop contributions to $(g-2)_µ$ and Wilson coefficients in Non-Minimal Flavor Violating (NMFV) MSSM scenarios. Evaluating numerically the general results in specific scenarios, we show which scenarios could be (dis-)favored by the experimental $(g-2)_µ$ tension and flavor anomalies. These results provide important insights for BSM searches in general MSSM scenarios.
In R-parity violating supersymmetric scenario, assuming the third-generation superpartners to be the lightest (calling the scenario RPV3), we show that there are some benchmark scenarios in which $R_{D^{(*)}}$, $R_{K^{(*)}}$ and $(g-2)_{\mu}$ anomalies can be addressed and also can be detected at 14 TeV LHC or future hadron colliders. We consider $\overline{t}\mu\overline{\mu}$ as our final...
We reinterpret two recent LHC searches for events containing four top quarks ($t\bar{t}t\bar{t}$) in the context of supersymmetric models with Dirac gauginos and color-octet scalars (sgluons). We explore whether sgluon contributions to the four-top production cross section $\sigma(pp \to t\bar{t}t\bar{t})$ can accommodate an excess of four-top events recently reported by the ATLAS...
