Ulrich Ellwanger
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View article: NMSSM explanation for excesses in the search for neutralinos and charginos and a 95 GeV Higgs boson
NMSSM explanation for excesses in the search for neutralinos and charginos and a 95 GeV Higgs boson Open
The observed excesses in the search for neutralinos and charginos by ATLAS and CMS can be fitted simultaneously in the minimal supersymmetric standard model (MSSM) assuming a light higgsino mass, of magnitude less than about 250 GeV, and a…
View article: Nmssm with correct relic density and an additional 95 GeV Higgs boson
Nmssm with correct relic density and an additional 95 GeV Higgs boson Open
We investigate whether it is possible within the NMSSM to describe simultaneously a correct dark matter relic density complying with the latest null results from the LZ experiment, an extra Higgs boson with a mass of $$\sim 95$$ GeV vi…
View article: NMSSM Explanation for Excesses in the Search for Neutralinos and Charginos and a 95 GeV Higgs Boson
NMSSM Explanation for Excesses in the Search for Neutralinos and Charginos and a 95 GeV Higgs Boson Open
The observed excesses in the search for neutralinos and charginos by ATLAS and CMS can be fitted simultaneously in the minimal supersymmetric standard model (MSSM) assuming a light higgsino mass, of magnitude less than about 250 GeV, and a…
View article: NMSSM with correct relic density and an additional 95 GeV Higgs boson
NMSSM with correct relic density and an additional 95 GeV Higgs boson Open
We investigate whether it is possible within the NMSSM to describe simultaneously a correct dark matter relic density complying with the latest null results from the LZ experiment, an extra Higgs boson with a mass of ~95 GeV visible in the…
View article: Benchmark Lines and Planes for Higgs-to-Higgs Decays in the NMSSM
Benchmark Lines and Planes for Higgs-to-Higgs Decays in the NMSSM Open
A number of benchmark scenarios for NMSSM Higgs boson searches via Higgs-to-Higgs decays at the LHC have been proposed by the NMSSM Subgroup of the LHC HWG3. Some of them are already in use by the ATLAS and CMS collaborations for the inter…
View article: Additional Higgs Bosons near 95 and 650 GeV in the NMSSM
Additional Higgs Bosons near 95 and 650 GeV in the NMSSM Open
Hints for an additional Higgs boson with a mass of about 95 GeV originate from LEP and searches in the diphoton channel by CMS and ATLAS. A search for resonant production of SM plus BSM Higgs bosons in the diphoton plus bb channel by CMS s…
View article: $$M_W$$, dark matter and $$a_\mu $$ in the NMSSM
$$M_W$$, dark matter and $$a_\mu $$ in the NMSSM Open
We study regions in the parameter space of the NMSSM which are able to simultaneously explain the current measured values for the W mass $$M_W$$ and the muon anomalous magnetic moment $$a_\mu $$ , and provide a dark matter relic de…
View article: A Repository for Beyond-the-Standard-Model Tools
A Repository for Beyond-the-Standard-Model Tools Open
To aid phenomenological studies of Beyond-the-Standard-Model (BSM) physics scenarios, a web repository for BSM calculational tools has been created. We here present brief overviews of the relevant codes, ordered by topic as well as by alph…
View article: Higgs-mass predictions in the MSSM and beyond
Higgs-mass predictions in the MSSM and beyond Open
Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions of the Standard Model, where they play a crucial role in constraining the parameter space. The discovery of a Higgs boson and the remarkably precise me…
View article: Gradient flows for $$\beta $$ β functions via multi-scale renormalization group equations
Gradient flows for $$\beta $$ β functions via multi-scale renormalization group equations Open
Renormalization schemes and cutoff schemes allow for the introduction of various distinct renormalization scales for distinct couplings. We consider the coupled renormalization group flow of several marginal couplings which depend on just …
View article: Exploring sensitivity to NMSSM signatures with low missing transverse energy at the LHC
Exploring sensitivity to NMSSM signatures with low missing transverse energy at the LHC Open
A bstract We examine scenarios in the Next-to-Minimal Supersymmetric Standard Model (NMSSM), where pair-produced squarks and gluinos decay via two cascades, each ending in a stable neutralino as Lightest Supersymmetric Particle (LSP) and a…
View article: Handbook of LHC Higgs Cross Sections: 4. Deciphering the Nature of the Higgs Sector
Handbook of LHC Higgs Cross Sections: 4. Deciphering the Nature of the Higgs Sector Open
This Report summarizes the results of the activities of the LHC Higgs Cross Section Working Group in the period 2014-2016. The main goal of the working group was to present the state-of-the-art of Higgs physics at the LHC, integrating all …
View article: Possible Explanation of the Electron Positron Anomaly at 17 MeV in $^8Be$ Transitions Through a Light Pseudoscalar
Possible Explanation of the Electron Positron Anomaly at 17 MeV in $^8Be$ Transitions Through a Light Pseudoscalar Open
We estimate the values of Yukawa couplings of a light pseudoscalar A with a mass of about 17 MeV, which would explain the $^8Be$ anomaly observed in the Atomki pair spectrometer experiment. The resulting couplings of A to up and down type …
View article: A 750 GeV Diphoton Signal from a Very Light Pseudoscalar in the NMSSM
A 750 GeV Diphoton Signal from a Very Light Pseudoscalar in the NMSSM Open
The excess of events in the diphoton final state near 750 GeV observed by ATLAS and CMS can be explained within the NMSSM near the R-symmetry limit. Both scalars beyond the Standard Model Higgs boson have masses near 750 GeV, mix strongly,…
View article: Discovery prospects of a light scalar in the NMSSM
Discovery prospects of a light scalar in the NMSSM Open
A bstract We study a region in the NMSSM parameter space in which the mass of the SM-like Higgs boson is uplifted by ∼ 4 − 17 GeV, allowing for stop masses and | A t | ≤ 1 TeV alleviating the little fine tuning problem of the MSSM. An upli…