Conveners
Supersymmetry phenomenology and experiment
- Jason Evans (Shanghai Jiaotong University/TDLI)
Supersymmetry phenomenology and experiment
- Jeff Shahinian (University of Pennsylvania (US))
Supersymmetry phenomenology and experiment
- Jeff Shahinian (University of Pennsylvania (US))
Supersymmetry phenomenology and experiment
- Jason Evans (Shanghai Jiaotong University/TDLI)
Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. With increasing mass bounds on MSSM scenarios other non-minimal variations of supersymmetry become increasingly interesting. This talk will present the latest results of searches conducted by the ATLAS experiment...
Results from the CMS experiment are presented for supersymmetry searches targeting so-called compressed spectra, with 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 and presents results based on these techniques.
Electroweak states below the TeV scale, motivated by Folded SUSY and confined by a new SU(3) gauge group, can still be discovered at the LHC. We show that masses as low as $100~{\rm GeV}$ evade current searches. Also, we propose using displaced vertex searches and a novel strategy as methods for discovery at the high-luminosity LHC.
The stransverse mass variable MT2 was originally proposed for the study of SUSY-like events at hadron colliders in which N=2 parent particles are produced and then decay semi-invisibly. Here we consider the generalization to the case of Nโฅ3 semi-invisibly decaying parent particles. We introduce the corresponding class of kinematic variables MTN and illustrate their mathematical properties....
Despite the large amount of data produced by the Large Hadron Collider (LHC), no clear evidence of New Physics (NP) has emerged so far. Most LHC searches target exclusive channels, focusing on specific final states, but NP may appear as a dispersed signal across many channels. This motivates a more global approach to finding out where beyond the Standard Model physics might be hiding. We...
In supersymmetric models where the mu problem is solved via discrete R-symmetries, then both the global $U(1)_{PQ}$ (Peccei-Quinn, needed to solve the strong CP problem) and R-parity conservation (RPC, needed for proton stability) are expected to arise as accidental, approximate symmetries. Then in some cases, SUSY dark matter is expected to be all axions since the relic lightest SUSY...
A higgsino could be some or all of the dark matter, with a mass bounded from above by about 1.1 TeV assuming a thermal freezeout density, and from below by collider searches. Direct detection experiments imply purity constraints on a dark matter higgsino, limiting the mixing with the electroweak gauginos. Using the new strong limits available as of the end of 2024 from the LUX-ZEPLIN...
LUX-ZEPLIN (LZ) is a direct detection dark matter experiment located nearly a mile underground at the Sanford Underground Research Facility in South Dakota, USA, employing 7 tonnes of active liquid xenon in a dual-phase time projection chamber (TPC). It is further surrounded by a veto system that includes a 2-tonne liquid xenon skin, a gadolinium-loaded liquid scintillator, and an ultra-pure...
In the context of out of equilibrium radial field dynamics during inflation, ALPs can attain resonantly enhanced perturbation amplitudes. We present how such enhanced amplitudes can lead to a boost in primordial dark matter fraction as well as gravity waves observable by existing and future gravity wave detectors. SUSY embeddings of this class of scenarios will also be discussed.
We discuss a Dual to ordinary matter that yields composite self-interacting dark matter. For each elementary particle inn the SM, the Dual:
1. Changes spin by ยฝ, i.e. a SUSY-lite;
2. U(1): Changes electric charge e to magnetic charge g with g=e/๏ก; to avoid non-integer magnetic charge the up and down squark sectors have g=+3g and -6g, the charged sleptons and Wino are charged 2g;
3....
Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. Naturalness arguments favour supersymmetric partners of the gluons and third-generation quarks with masses light enough to be produced at the LHC. This talk will present the latest results of searches conducted by the...
A wide variety of searches for strong and electroweak productionSupersymmetry have been performed by experiments at the Large Hadron Collider. In this talk, we present recent highlights from these searches.
The direct production of electroweak SUSY particles, including sleptons, charginos, and neutralinos, is a particularly interesting area with connections to dark matter and the naturalness of the Higgs mass. The small production cross-sections and challenging experimental signatures lead to difficult searches. This talk will highlight the most recent results of searches performed by the ATLAS...
For the first time ATLAS and CMS report consistently about excesses in the search for EW SUSY particles, seen in two different search channels by each experiment. We interpret these excesses as the production of two light EW MSSM particles, yielding $M_1 \sim M_2$, i.e. not within "natural GUT-based scenarios". We also interpret these excesses in the NMSSM, where the relation $M_1 \sim M_2/2...
Since the classic searches for supersymmetry under R-parity conserving scenarios have not given any strong indication for new physics yet, more and more supersymmetry searches are carried out on a wider range of supersymmetric scenarios. This talk focuses on searches looking for signatures of stealth and R-parity-violating supersymmetry.
The string landscape statistical draw to large scalar soft masses leads to a mixed quasi-
degeneracy/decoupling solution to the SUSY flavor and CP problems where first/second
generation matter scalars lie in the 20-40 TeV range. With increasing first/second gen-
eration scalars, SUSY models actually become more natural due to two-loop RG effects
which suppress the corresponding third...
Supersymmetry (SUSY) models with featuring small mass splittings between one or more particles and the lightest neutralino could solve the hierarchy problem as well as offer a suitable dark matter candidate consistent with the observed thermal-relic dark matter density. However, the detection of SUSY higgsinos at the LHC remains challenging especially if their mass-splitting is O(1 GeV) or...
We discuss indirect probes of the MSSM at FCC-ee, with particular emphasis on the complementarity between single Higgs production and electroweak precision tests at the Tera-Z run. In addition to flavor-universal contributions to the STWY oblique parameters, we point out important flavor non-universal effects. An example of the latter is the heavy Higgs doublet, which gives tree-level shifts...
The permanent electric dipole moments (EDMs) of nucleons, atoms, and electrons serve as powerful probes of new physics beyond the TeV scale. Once a non-vanishing EDM is discovered, an important issue may be identification of the underlying CP violating source originated from high energy physics. In this work, we investigate the feasibility of experimentally identifying the ultraviolet (UV)...
The search for weakly interacting matter particles (WIMPs) is one of the main objectives of the High Luminosity Large Hadron Collider (HL-LHC). In this work we use Machine-Learning (ML) techniques to explore WIMP radiative decays into a Dark Matter (DM) candidate in a supersymmetric framework. The minimal supersymmetric WIMP sector includes the lightest neutralino that can provide the observed...
