Daniel Egaña-Ugrinovic
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View article: Search for continuous gravitational wave signals from luminous dark photon superradiance clouds with LVK O3 observations
Search for continuous gravitational wave signals from luminous dark photon superradiance clouds with LVK O3 observations Open
Superradiance clouds of kinetically mixed dark photons around spinning black holes can produce observable multimessenger electromagnetic and gravitational wave signals. The cloud generates electric fields of up to a teravolt-per-meter, whi…
View article: Search for continuous gravitational wave signals from luminous dark photon superradiance clouds with LVK O3 observations
Search for continuous gravitational wave signals from luminous dark photon superradiance clouds with LVK O3 observations Open
Superradiance clouds of kinetically-mixed dark photons around spinning black holes can produce observable multi-messenger electromagnetic and gravitational wave signals. The cloud generates electric fields of up to a Teravolt-per-meter, wh…
View article: Dual-sided charge-coupled devices
Dual-sided charge-coupled devices Open
Existing charge-coupled devices (CCDs) operate by detecting either the electrons or holes created in an ionization event. Here, we propose an imager, the dual-sided CCD, which collects and measures both charge carriers on opposite sides of…
View article: Doped semiconductor devices for sub-MeV dark matter detection
Doped semiconductor devices for sub-MeV dark matter detection Open
Dopant atoms in semiconductors can be ionized with ∼10 meV energy depositions, allowing for the design of low-threshold detectors. We propose using doped semiconductor targets to search for sub-MeV dark matter scattering or sub-eV dark ma…
View article: Low-energy radiative backgrounds in CCD-based dark-matter detectors
Low-energy radiative backgrounds in CCD-based dark-matter detectors Open
A bstract The reach of sub-GeV dark-matter detectors is at present severely affected by low-energy events from various origins. We present the theoretical methods to compute the single- and few-electron events that arise from secondary rad…
View article: Low-Energy Radiative Backgrounds in CCD-Based Dark-Matter Detectors
Low-Energy Radiative Backgrounds in CCD-Based Dark-Matter Detectors Open
The reach of sub-GeV dark-matter detectors is at present severely affected by low-energy events from various origins. We present the theoretical methods to compute the single- and few-electron events that arise from secondary radiation emi…
View article: Dual-sided Charge-Coupled Devices
Dual-sided Charge-Coupled Devices Open
Existing Charge-Coupled Devices (CCDs) operate by detecting either the electrons or holes created in an ionization event. We propose a new type of imager, the Dual-Sided CCD, which collects and measures both charge carriers on opposite sid…
View article: Dark photon superradiance: Electrodynamics and multimessenger signals
Dark photon superradiance: Electrodynamics and multimessenger signals Open
We study the electrodynamics of a kinetically mixed dark photon cloud that forms through superradiance around a spinning black hole, and design strategies to search for the resulting multimessenger signals. A dark photon superradiance clou…
View article: Dark photon superradiance: Electrodynamics and multimessenger signals
Dark photon superradiance: Electrodynamics and multimessenger signals Open
We study the electrodynamics of a kinetically mixed dark photon cloud that forms through superradiance around a spinning black hole, and design strategies to search for the resulting multimessenger signals. A dark photon superradiance clou…
View article: Doped Semiconductor Devices for sub-MeV Dark Matter Detection
Doped Semiconductor Devices for sub-MeV Dark Matter Detection Open
Dopant atoms in semiconductors can be ionized with $\sim10$ meV energy depositions, allowing for the design of low-threshold detectors. We propose using doped semiconductor targets to search for sub-MeV dark matter scattering or sub-eV dar…
View article: New physics searches at kaon and hyperon factories
New physics searches at kaon and hyperon factories Open
Rare meson decays are among the most sensitive probes of both heavy and light new physics. Among them, new physics searches using kaons benefit from their small total decay widths and the availability of very large datasets. On the other h…
View article: Charged fermions below 100 GeV
Charged fermions below 100 GeV Open
How light can a fermion be if it has unit electric charge? We revisit the lore that LEP robustly excludes charged fermions lighter than about 100 GeV. We review LEP chargino searches, and find them to exclude charged fermions lighter than …
View article: Snowmass2021 Cosmic Frontier White Paper: Calibrations and backgrounds for dark matter direct detection
Snowmass2021 Cosmic Frontier White Paper: Calibrations and backgrounds for dark matter direct detection Open
Future dark matter direct detection experiments will reach unprecedented levels of sensitivity. Achieving this sensitivity will require more precise models of signal and background rates in future detectors. Improving the precision of sign…
View article: Strange quark as a probe for new physics in the Higgs sector
Strange quark as a probe for new physics in the Higgs sector Open
This paper describes a novel algorithm for tagging jets originating from the hadronisation of strange quarks (strange-tagging) with the future International Large Detector (ILD) at the International Linear Collider (ILC). It also presents …
View article: Searching for Ultra-light Bosons and Constraining Black Hole Spin Distributions with Stellar Tidal Disruption Events
Searching for Ultra-light Bosons and Constraining Black Hole Spin Distributions with Stellar Tidal Disruption Events Open
Stars that pass close to the supermassive black holes located in the center of galaxies can be violently disrupted by tidal forces, leading to flares that are observed as bright transient events in sky surveys. The rate for these events to…
View article: Sources of Low-Energy Events in Low-Threshold Dark-Matter and Neutrino Detectors
Sources of Low-Energy Events in Low-Threshold Dark-Matter and Neutrino Detectors Open
We discuss several low-energy backgrounds to sub-GeV dark matter searches,\nwhich arise from high-energy particles of cosmic or radioactive origin that\ninteract with detector materials. We focus in particular on Cherenkov\nradiation, tran…
View article: Multi-Higgs boson production probes Higgs sector flavor
Multi-Higgs boson production probes Higgs sector flavor Open
We demonstrate that multiple-Higgs production at the LHC is the most sensitive probe of first- and second-generation quark flavor in the Higgs sector. In models where new scalars couple to light quarks, gigantic di-Higgs and even sizable t…
View article: Sources of Low-Energy Events in Low-Threshold Dark Matter Detectors
Sources of Low-Energy Events in Low-Threshold Dark Matter Detectors Open
We discuss several low-energy backgrounds to sub-GeV dark matter searches, which arise from high-energy particles of cosmic or radioactive origin that interact with detector materials. We focus on Cherenkov radiation, transition radiation,…
View article: Light Scalars and the Koto Anomaly
Light Scalars and the Koto Anomaly Open
We show that the recent excess presented by KOTO in their search for K_{L}→π^{0}νν[over ¯] may be due to weakly coupled scalars produced from Kaon decays. We study two concrete realizations, the minimal Higgs portal and a hadrophilic scala…
View article: Higgs bosons with large couplings to light quarks
Higgs bosons with large couplings to light quarks Open
A common lore has arisen that beyond the Standard Model (BSM) particles,\nwhich can be searched for at current and proposed experiments, should have\nflavorless or mostly third-generation interactions with Standard Model quarks.\nThis theo…
View article: Aligned and Spontaneous Flavor Violation
Aligned and Spontaneous Flavor Violation Open
We present a systematic spurion setup called aligned flavor violation (AFV) that allows for new physics couplings to quarks that are aligned with standard model (SM) Yukawa couplings, but do not necessarily share their hierarchies nor are …
View article: Structure formation and exotic compact objects in a dissipative dark sector
Structure formation and exotic compact objects in a dissipative dark sector Open
Here, we present the complete history of structure formation in a simple dissipative dark-sector model. The model has only two particles: a dark electron, which is a subdominant component of dark matter, and a dark photon. Dark-electron pe…
View article: Higgs Boson Contributions to the Electron Electric Dipole Moment
Higgs Boson Contributions to the Electron Electric Dipole Moment Open
The contributions of a second Higgs doublet to the electron electric dipole moment near the heavy Higgs decoupling limit are determined within an effective field theory framework. In models that satisfy the Glashow-Weinberg condition, the …
View article: The minimal fermionic model of electroweak baryogenesis
The minimal fermionic model of electroweak baryogenesis Open
We present the minimal model of electroweak baryogenesis induced by fermions.\nThe model consists of an extension of the Standard Model with one electroweak\nsinglet fermion and one pair of vector like doublet fermions with\nrenormalizable…
View article: Current challenges in fundamental physics
Current challenges in fundamental physics Open
The discovery of the Higgs boson at the Large Hadron Collider completed the Standard Model of particle physics. The Standard Model is a remarkably successful theory of fundamental physics, but it suffers from severe problems. It does not p…