Publications (149)
Tools for probing new physics with newly discovered gamma-ray targets
Chance Hoskinson, Jason Kumar, Pearl Sandick
We present a computational tool, TweedleDEE, for empirically modeling diffuse gamma-ray background emission in a 1 degree region of the sky, using publicly available gamma-ray data…
Cosmic-ray upscattered inelastic dark matter
Nicole F. Bell, James B. Dent, Bhaskar Dutta +4
Light non-relativistic components of the galactic dark matter halo elude direct detection constraints because they lack the kinetic energy to create an observable recoil. However,…
Orientifolds, RG Flows, and Closed String Tachyons
Shamit Kachru, Jason Kumar, Eva Silverstein
We discuss the fate of certain tachyonic closed string theories from two perspectives. In both cases our approach involves studying directly configurations with finite negative tre…
Surveying Standard Model Flux Vacua on
Jason Kumar, James D. Wells
We consider the SU(2)LxSU(2)R Standard Model brane embedding in an orientifold of T6/Z2xZ2. Within defined limits, we construct all such Standard Model brane embeddings and determi…
Dark Matter Through the Quark Vector Current Portal
Dillon Berger, Arvind Rajaraman, Jason Kumar
We consider models of light dark matter coupled to quarks through a vector current interaction. For low energies, these models must be treated through the effective couplings to me…
*-Wars Episode I: The Phantom Anomaly
Ken Intriligator, Jason Kumar
As pointed out, chiral non-commutative theories exist, and examples can be constructed via string theory. Gauge anomalies require the matter content of individual gauge group facto…
A Study of Dark Matter and QCD-Charged Mediators in the Quasi-Degenerate Regime
Andrew Davidson, Chris Kelso, Jason Kumar +2
We study a scenario in which the only light new particles are a Majorana fermion dark matter candidate and one or more QCD-charged scalars, which couple to light quarks. This scena…
Detection Prospects for Majorana Fermion WIMPless Dark Matter
Keita Fukushima, Jason Kumar, Pearl Sandick
We consider both velocity-dependent and velocity-independent contributions to spin-dependent (SD) and spin-independent (SI) nuclear scattering (including one-loop corrections) of W…
Vacuum Energy Cancellation in a Non-supersymmetric String
Shamit Kachru, Jason Kumar, Eva Silverstein
We present a nonsupersymmetric orbifold of type II string theory and show that it has vanishing cosmological constant at the one and two loop level. We argue heuristically that the…
Overcoming Velocity Suppression in Dark-Matter Direct-Detection Experiments
Keith R. Dienes, Jason Kumar, Brooks Thomas +1
Pseudoscalar couplings between Standard-Model quarks and dark matter are normally not considered relevant for dark-matter direct-detection experiments because they lead to velocity…
New Dark Matter Search Strategies at DUNE
Carsten Rott, Seongjin In, Jason Kumar +1
If dark matter annihilates to light quarks in the core of the Sun, then a flux of 236 MeV neutrinos will be produced from the decay of stopped kaons. We consider strategies for DUN…
-factors for Velocity-dependent Dark Matter
Bradly Boucher, Jason Kumar, Van B. Le +1
If dark matter annihilates with a velocity-dependent cross section within a subhalo, then the magnitude and angular distribution of the resulting photon signal will change. These e…
Boxes, Boosts, and Energy Duality: Understanding the Galactic-Center Gamma-Ray Excess through Dynamical Dark Matter
Kimberly K. Boddy, Keith R. Dienes, Doojin Kim +3
Many models currently exist which attempt to interpret the excess of gamma rays emanating from the Galactic Center in terms of annihilating or decaying dark matter. These models ty…
Spin Determination for Fermiophobic Bosons
Jason Kumar, Arvind Rajaraman, David Yaylali
We discuss the prospects for production and detection of fermiophobic bosons (exotic bosons decaying only to standard model gauge bosons) at the LHC, and describe simple methods fo…
Minding the MeV Gap: the Indirect Detection of Low Mass Dark Matter
Kimberly K. Boddy, Jason Kumar
We consider the prospects for the indirect detection of low mass dark matter which couples dominantly to quarks. If the center of mass energy is below about 280 MeV, the kinematica…
A Strategy for Identifying Periodic Sources Contributing to the Galactic Center Excess
Eric J. Baxter, Jason Kumar
The origin of the Galactic Center gamma-ray excess has not been conclusively determined after over a decade of careful study. The two most widely discussed possibilities are a popu…
Model-independent constraints on dark matter annihilation in dwarf spheroidal galaxies
Kimberly K. Boddy, Jason Kumar, Danny Marfatia +1
We present a general, model-independent formalism for determining bounds on the production of photons in dwarf spheroidal galaxies via dark matter annihilation, applicable to any s…
Dark Matter Velocity Distributions: Comparing Numerical Simulations to Analytic Results
Katharena Christy, Jason Kumar, Louis E. Strigari
We test the consistency of dark matter velocity distributions obtained from dark matter-only numerical simulations with analytic predictions, using the publicly available Via Lacte…
Applying Simulation-Based Inference to Spectral and Spatial Information from the Galactic Center Gamma-Ray Excess
Katharena Christy, Eric J. Baxter, Jason Kumar
The two most favored explanations of the Fermi Galactic Center gamma-ray excess (GCE) are millisecond pulsars and self annihilation of the smooth dark matter halo of the galaxy. In…
Angular distribution of gamma-ray emission from velocity-dependent dark matter annihilation in subhalos
Kimberly K. Boddy, Jason Kumar, Jack Runburg +1
We consider the effect of velocity-dependent dark matter annihilation on the angular distribution of gamma rays produced in dark matter subhalos. We assume that the dark matter pot…
Direct detection of electromagnetically interacting ultraheavy dark matter
Jason Kumar, Biprajit Mondal, Girish Muralidhara +1
At a level too faint for astronomy, particle dark matter may interact with Standard Model states via the photon. We derive limits from direct detection experiments on photon-mediat…
High-Energy Scattering in Non-Commutative Field Theory
Jason Kumar, Arvind Rajaraman
We analyze high energy scattering for non-commutative field theories using the dual gravity description. We find that the Froissart-Martin bound still holds, but that cross-section…
Hidden Sector Baryogenesis
Bhaskar Dutta, Jason Kumar
We introduce a novel mechanism for baryogenesis, in which mixed anomalies between the hidden sector and drive the baryon asymmetry. We demonstrate that this mechani…
Intersecting Brane Models and Cosmology
Jason Kumar
We discuss the application of general features of intersecting brane model constructions in cosmology. In particular, we describe a scenario for D-term inflation which arises strai…
Low-mass inelastic dark matter direct detection via the Migdal effect
Nicole F. Bell, James B. Dent, Bhaskar Dutta +3
We consider searches for the inelastic scattering of low-mass dark matter at direct detection experiments, using the Migdal effect. We find that there are degeneracies between the…
Cosmological Constraints on Unstable Particles: Numerical Bounds and Analytic Approximations
Keith R. Dienes, Jason Kumar, Patrick Stengel +1
Many extensions of the Standard Model predict large numbers of additional unstable particles whose decays in the early universe are tightly constrained by observational data. For e…
Proton annihilation at hadron colliders and Kamioka: high-energy versus high-luminosity
Joseph Bramante, Jason Kumar, John Learned
We examine models and prospects for proton annihilation to dileptons, a process which violates baryon and lepton number each by two. We determine that currently Super-Kamiokande wo…
New Signatures of WIMPless Dark Matter
Jason Kumar
We consider new signatures of WIMPless dark matter, particularly those which can be used to test models with low dark matter mass. We focus on detection prospects at hadron collide…
Tools for Studying Low-Mass Dark Matter at Neutrino Detectors
Jason Kumar, John G. Learned, Katherine Richardson +1
We determine the neutrino spectra arising from low-mass (4-10 GeV) dark matter annihilating in the sun. We also determine the low-mass dark matter capture rates (element by element…
Scaling Relations for Dark Matter Halos Hosting Ultra-Faint Dwarf Galaxies
Levi K. C. Fisher, Isabelle S. Goldstein, Jason Kumar +1
We consider the extraction of parameters of dark matter halos hosting ultra-faint dwarf galaxies, in the case where there are only identified member stars with measu…
Constraints on the Injection of Radiation in the Early Universe
Melissa Joseph, Jason Kumar, Pearl Sandick
We consider the generic injection of radiation (both dark and electromagnetic) during the epoch between big bang nucleosynthesis (BBN) and recombination. The contribution of the ad…
Probing the Green-Schwarz Mechanism at the Large Hadron Collider
Jason Kumar, Arvind Rajaraman, James D. Wells
We investigate the phenomenology of new abelian gauge bosons, which we denote as bosons, that suffer a mixed anomaly with the Standard Model, but are made self-consistent by th…
Opportunities for probing with light mediators
Bhaskar Dutta, Sumit Ghosh, Jason Kumar
We consider strategies for using new datasets to probe scenarios in which light right-handed SM fermions couple to a new gauge group, . This scenario provides a natural…
Lines and Boxes: Unmasking Dynamical Dark Matter through Correlations in the MeV Gamma-Ray Spectrum
Kimberly K. Boddy, Keith R. Dienes, Doojin Kim +3
Identifying signatures of dark matter at indirect-detection experiments is generally more challenging for scenarios involving non-minimal dark sectors such as Dynamical Dark Matter…
The Secret Gauging of Flavor Symmetries in Noncommutative QFT
Ken Intriligator, Jason Kumar
We show that flavor 't Hooft anomalies automatically vanish in noncommutative field theories which are obtained from string theory in the decoupling limit. We claim that this is be…
Vector dark matter annihilation with internal bremsstrahlung
Gulab Bambhaniya, Jason Kumar, Danny Marfatia +2
We consider scenarios in which the annihilation of self-conjugate spin-1 dark matter to a Standard Model fermion-antifermion final state is chirality suppressed, but where this sup…
LHC and ILC probes of hidden-sector gauge bosons
Jason Kumar, James D. Wells
Intersecting D-brane theories motivate the existence of exotic U(1) gauge bosons that only interact with the Standard Model through kinetic mixing with hypercharge. We analyze an e…
Matrix element analyses of dark matter scattering and annihilation
Jason Kumar, Danny Marfatia
We provide a compendium of results at the level of matrix elements for a systematic study of dark matter scattering and annihilation. We identify interactions that yield spin-depen…
Isospin-Violating Dark Matter Benchmarks for Snowmass 2013
Jonathan L. Feng, Jason Kumar, Danny Marfatia +1
Isospin-violating dark matter (IVDM) generalizes the standard spin-independent scattering parameter space by introducing one additional parameter, the neutron-to-proton coupling ra…
Landscape Cartography: A Coarse Survey of Gauge Group Rank and Stabilization of the Proton
Jason Kumar, James D. Wells
The landscape of string/M theory is surveyed over a large class of type flux compactification vacua. We derive a simple formula for the average size of the gauge group rank o…
Constraining Dark Matter Microphysics with the Annihilation Signal from Subhalos
Jack Runburg, Eric J. Baxter, Jason Kumar
In the cold dark matter scenario, galactic dark matter halos are populated with a large number of smaller subhalos. Previous work has shown that dark matter annihilations in subhal…
Low-Mass dark matter (in)direct detection with inelastic scattering
Nicole F. Bell, James B. Dent, Bhaskar Dutta +2
We revisit the detection of luminous dark matter in direct detection experiments. In this scenario, dark matter scatters endothermically to produce an excited state, which decays t…
On the Prospects for Detecting a Net Photon Circular Polarization Produced by Decaying Dark Matter
Andrey Elagin, Jason Kumar, Pearl Sandick +1
If dark matter interactions with Standard Model particles are -violating, then dark matter annihilation/decay can produce photons with a net circular polarization. We consider…
Are There Correlations in the HAWC and IceCube High Energy Skymaps Outside the Galactic Plane?
Jason Kumar, Carsten Rott, Pearl Sandick +1
We use publicly-available data to perform a search for correlations of high energy neutrino candidate events detected by IceCube and high-energy photons seen by the HAWC collaborat…
Extension of Standard Model: A Sub-GeV Dark Matter Model
Bhaskar Dutta, Sumit Ghosh, Jason Kumar
We present a model based on a extension of the Standard Model. The model addresses the mass hierarchy between the third generation and the first two generation fermion…
Light Dark Matter Accumulating in Planets: Nuclear Scattering
Joseph Bramante, Jason Kumar, Gopolang Mohlabeng +2
We present, for the first time, a complete treatment of strongly-interacting dark matter capture in planets, taking Earth as an example. We focus on light dark matter and the heati…
Supergravity Solutions for branes
Jason Kumar, Arvind Rajaraman
We find a large class of supersymmetric solutions in the background with NS fluxes. This two-parameter family of solutions preserves 8 of the 16 supersymmetries…
Sensitivity to Dark Sector Scales from Gravitational Wave Signatures
James B. Dent, Bhaskar Dutta, Sumit Ghosh +2
We consider gravitational wave signals produced by a first-order phase transition in a theory with a generic renormalizable thermal effective potential of power law form. We find t…
Explaining the XENON1T excess with Luminous Dark Matter
Nicole F. Bell, James B. Dent, Bhaskar Dutta +3
We show that the excess in electron recoil events seen by the XENON1T experiment can be explained by relatively low-mass Luminous Dark Matter candidate. The dark matter scatters in…
Tachyon Mediated Non-Gaussianity
Bhaskar Dutta, Jason Kumar, Louis Leblond
We describe a general scenario where primordial non-Gaussian curvature perturbations are generated in models with extra scalar fields. The extra scalars communicate to the inflaton…
New dark matter analysis of Milky Way dwarf satellite galaxies with MADHATv2
Kimberly K. Boddy, Zachary J. Carter, Jason Kumar +3
We obtain bounds on dark matter annihilation using 14 years of publicly available Fermi-LAT data from a set of 54 dwarf spheroidal galaxies, using spectral information from 16 ener…
WIMPless Dark Matter
Jonathan L. Feng, Jason Kumar
We describe the scenario of WIMPless dark matter. In this scenario of gauge-mediated supersymmetry breaking, a dark matter candidate in the hidden sector is found to naturally have…
Dipole Moment Bounds on Dark Matter Annihilation
Keita Fukushima, Jason Kumar
We consider constraints on simplified models in which scalar dark matter annihilates to light charged leptons through the exchange of charged mediators. We find that loop diagrams…
Explaining the DAMA Signal with WIMPless Dark Matter
Jonathan L. Feng, Jason Kumar, Louis E. Strigari
WIMPless dark matter provides a framework in which dark matter particles with a wide range of masses naturally have the correct thermal relic density. We show that WIMPless dark ma…
Charged mediators in dark matter scattering with nuclei and the strangeness content of nucleons: Strange Brew
Chris Kelso, Jason Kumar, Pearl Sandick +1
We consider a scenario, within the framework of the MSSM, in which dark matter is bino-like and dark matter-nucleon spin-independent scattering occurs via the exchange of light squ…
A Toy Model for Gauge-Mediation in Intersecting Brane Models
Jason Kumar
We discuss the phenomenology of a toy intersecting brane model where supersymmetry is dynamically broken in an open string hidden sector and gauge-mediated to the visible sector. S…
Indirect Detection of Low-mass Dark Matter Through the and Windows
J. G. Christy, Jason Kumar, Arvind Rajaraman
We consider the search for gamma-rays produced by the annihilation or decay of low-mass dark matter which couples to quarks. In this scenario, most of the photons are produced from…
Fermion WIMPless Dark Matter at DeepCore and IceCube
Vernon Barger, Jason Kumar, Danny Marfatia +1
We investigate the prospects for indirect detection of fermion WIMPless dark matter at the neutrino telescopes IceCube and DeepCore. The dark matter annihilating in the Sun is a hi…
Machine Learning Techniques for Intermediate Mass Gap Lepton Partner Searches at the Large Hadron Collider
Bhaskar Dutta, Tathagata Ghosh, Alyssa Horne +6
We consider machine learning techniques associated with the application of a Boosted Decision Tree (BDT) to searches at the Large Hadron Collider (LHC) for pair-produced lepton par…
Dark matter astrometry at underground detectors with multiscatter events
Joseph Bramante, Jason Kumar, Nirmal Raj
We show that current and imminent underground detectors are capable of precision astrometry of dark matter. First we show that galactic dark matter velocity distributions can be ob…
The Effective J-Factor of the Galactic Center for Velocity-Dependent Dark Matter Annihilation
Kimberly K. Boddy, Jason Kumar, Louis E. Strigari
We present the effective -factors for the Milky Way for scenarios in which dark matter annihilation is p-wave or d-wave suppressed. We find that the velocity suppression of dark…
Searching for light from a dark matter clump
Tathagata Ghosh, Jason Kumar, Danny Marfatia +1
The DAMPE experiment has recently reported an electron spectrum that can be explained by dark matter annihilation into charged lepton pairs in a nearby dark matter clump. The accom…
Sommerfeld-Enhanced -Factors For Dwarf Spheroidal Galaxies
Kimberly K. Boddy, Jason Kumar, Louis E. Strigari +1
For models in which dark matter annihilation is Sommerfeld-enhanced, the annihilation cross section increases at low relative velocities. Dwarf spheroidal galaxies (dSphs) have low…
B's with Direct Decays: Tevatron and LHC Discovery Prospects in the b\bar{b}+MET Channel
Johan Alwall, Jonathan L. Feng, Jason Kumar +1
We explore the discovery prospects for B'\bar{B}' pair production followed by direct decays B'->bX, where B' is a new quark and X is a long-lived neutral particle. We develop optim…
Multi-Brane Recombination and Standard Model Flux Vacua
Jason Kumar, James D. Wells
In a previous work, we noted that vacua with higher flux could be obtained by recombination of a small set of hidden-sector branes, numbering up to the Kahler degrees of freedom le…
Gamma Rays from Bino-like Dark Matter in the MSSM
Jason Kumar, Pearl Sandick
We consider regions of the parameter space of the Minimal Supersymmetric Standard Model (MSSM) with bino-like neutralino dark matter in which a large fraction of the total dark mat…
Approximate Bayesian Computation Applied to the Diffuse Gamma-ray Sky
Eric J. Baxter, J. G. Christy, Jason Kumar
Many sources contribute to the diffuse gamma-ray background (DGRB), including star forming galaxies, active galactic nuclei, and cosmic ray interactions in the Milky Way. Exotic so…
A Brief Comment on Instanton-like Singularities and Cosmological Horizons
Jason Kumar
We argue that in the presence of instanton-like singularities, the existence of cosmological horizons can become frame-dependent, ie. a horizon which appears in Einstein frame may…
Asymmetric Dark Matter from Hidden Sector Baryogenesis
Bhaskar Dutta, Jason Kumar
We consider the production of asymmetric dark matter during hidden sector baryogenesis. We consider a particular supersymmetric model where the dark matter candidate has a number d…
Dark matter annihilation with s-channel internal Higgsstrahlung
Jason Kumar, Jiajun Liao, Danny Marfatia
We study the scenario of fermionic dark matter that annihilates to standard model fermions through an s-channel axial vector mediator. We point out that the well-known chirality su…
Clustering with Light (but Massive) Relics
Jason Kumar, Pearl Sandick, Shuting Xu
We consider the effect of Light (but Massive) Relics (LiMRs) on the clustering of matter in the early Universe. We account for the fact that LiMRs which are massive enough may clus…
New Constraints on Isospin-Violating Dark Matter
Jason Kumar, David Sanford, Louis E. Strigari
We derive bounds on the dark matter annihilation cross-section for low-mass (5-20 GeV) dark matter annihilating primarily to up or down quarks, using the Fermi-LAT bound on gamma-r…
Large Jet Multiplicities and Natural Supersymmetry at the LHC
Jason Kumar
We consider a search strategy for new physics at the Large Hadron Collider which focuses on the signature of many jets and missing transverse energy, but no charged leptons. We sho…
Vector dark matter at the LHC
Jason Kumar, Danny Marfatia, David Yaylali
We consider monojet searches at the Large Hadron Collider (LHC) for spin-1 dark matter that interacts with quarks through a contact operator. If the dark matter particles are produ…
WIMPless Dark Matter: Models and Signatures
Jason Kumar
We consider experimental signatures of WIMPless dark matter. We focus on models where the WIMPless dark matter candidate is a Majorana fermion, and dark matter scattering is predom…
A Review of Distributions on the String Landscape
Jason Kumar
We review some basic flux vacua counting techniques and results, focusing on the distributions of properties over different regions of the landscape of string vacua and assessing t…
Large Jet Multiplicities and New Physics at the LHC
Joseph Bramante, Jason Kumar, Brooks Thomas
A broad class of scenarios for new physics involving additional strongly-interacting fields generically predicts signatures at hadron colliders which consist solely of large number…
Dynamical Dark Matter and the Positron Excess in Light of AMS
Keith R. Dienes, Jason Kumar, Brooks Thomas
The AMS-02 experiment has recently released data which confirms a rise in the cosmic-ray positron fraction as a function of energy up to approximately 350 GeV. Over the past decade…
Asymmetric Dark Matter
Jason Kumar
We review the theoretical framework underlying models of asymmetric dark matter, describe astrophysical constraints which arise from observations of neutron stars, and discuss the…
Scale Dependent Local Non-Gaussianity from Loops
Jason Kumar, Louis Leblond, Arvind Rajaraman
We analyze multi-field inflationary systems which yield strongly scale dependent non-Gaussianity with a shape that is very close to the local shape. As in usual multi-field models,…
Dynamical Dark Matter from Thermal Freeze-Out
Keith R. Dienes, Jacob Fennick, Jason Kumar +1
In the Dynamical Dark Matter (DDM) framework, the dark sector comprises a large number of constituent dark particles whose individual masses, lifetimes, and cosmological abundances…
The Velocity-Dependent -factor of the Milky Way Halo: Does What Happens in the Galactic Bulge Stay in the Galactic Bulge?
Kenny Kiriu, Jason Kumar, Jack Runburg
We consider the angular distribution of the photon signal which could arise from velocity-dependent dark matter annihilation within the Galactic bulge. We find that, for the case o…
Off-Diagonal Dark-Matter Phenomenology: Exploring Enhanced Complementarity Relations in Non-Minimal Dark Sectors
Keith R. Dienes, Jason Kumar, Brooks Thomas +1
In most multi-component dark-matter scenarios, two classes of processes generically contribute to event rates at experiments capable of probing the nature of the dark sector. The f…
Neutrino Topology Reconstruction at DUNE and Applications to Searches for Dark Matter Annihilation in the Sun
Carsten Rott, DongYoung Jeong, Jason Kumar +1
We consider a new technique for neutrino energy and topology reconstruction at DUNE. In particular, we show that when the direction of the incoming neutrino is known, one can use t…
Searching for Dark Matter Annihilation to Monoenergetic Neutrinos with Liquid Scintillation Detectors
Jason Kumar, Pearl Sandick
We consider searches for dark matter annihilation to monoenergetic neutrinos in the core of the Sun. We find that liquid scintillation neutrino detectors have enhanced sensitivity…
An Inflationary Scenario in Intersecting Brane Models
Bhaskar Dutta, Jason Kumar, Louis Leblond
We propose a new scenario for D-term inflation which appears quite straightforwardly in the open string sector of intersecting brane models. We take the inflaton to be a chiral fie…
Connecting Dark Matter Annihilation to the Vertex Functions of Standard Model Fermions
Jason Kumar, Christopher Light
We consider scenarios in which dark matter is a Majorana fermion which couples to Standard Model fermions through the exchange of charged mediating particles. The matrix elements f…
Gamma-ray Signals from Dark Matter Annihilation Via Charged Mediators
Jason Kumar, Pearl Sandick, Fei Teng +1
We consider a simplified model in which Majorana fermion dark matter annihilates to charged fermions through exchange of charged mediators. We consider the gamma-ray signals arisin…
MADHAT: Model-Agnostic Dark Halo Analysis Tool
Kimberly K. Boddy, Stephen Hill, Jason Kumar +2
We present the Model-Agnostic Dark Halo Analysis Tool (MADHAT), a numerical tool which implements a Fermi-LAT data-driven, model-independent analysis of gamma-ray emission from dwa…
Explaining and using the light mediators of
Bhaskar Dutta, Sumit Ghosh, Peisi Huang +1
Scenarios in which right-handed light Standard Model fermions couple to a new gauge group, can naturally generate a sub-GeV dark matter candidate. But such models nece…
Directional Searches at DUNE for Sub-GeV Monoenergetic Neutrinos Arising from Dark Matter Annihilation in the Sun
Carsten Rott, Seongjin In, Jason Kumar +1
We consider the use of directionality in the search for monoenergetic sub-GeV neutrinos arising from the decay of stopped kaons, which can be produced by dark matter annihilation i…
Astrophysical Neutrino Sources as Colliders
Carlos A. Argüelles, P. S. Bhupal Dev, Bhaskar Dutta +6
High-energy neutrinos arise from processes at large center-of-mass energies, offering a window to test physics at comparable scales or beyond those accessible in collider experimen…
Dark Matter Detection With Electron Neutrinos in Liquid Scintillation Detectors
Jason Kumar, John G. Learned, Michinari Sakai +1
We consider the prospects for liquid scintillation experiments (with a focus on KamLAND) to detect the flux of electron neutrinos arising from dark matter annihilation in the core…
Producing the GeV Galactic Center Excess via Cosmic Ray-Dark Matter Scattering
Bhaskar Dutta, Debopam Goswami, Jason Kumar +2
In this work, we propose a novel mechanism for generating gamma rays from the Galactic Center via scattering of cosmic-ray protons off dark matter in the Milky Way halo, in contras…
Indirect Detection of Sub-GeV Dark Matter Coupling to Quarks
Jason Kumar
We consider photon signals arising from the annihilation or decay of low-mass (sub-GeV) dark matter which couples dominantly to quarks. In this scenario, the branching fractions to…
Simplified dark matter models with charged mediators
Tathagata Ghosh, Chris Kelso, Jason Kumar +2
We review simplified models in which a singlet Majorana dark matter candidate couples to Standard Model (SM) fermions through interactions mediated by scalar fermion partners. We s…
Local Scale-Dependent Non-Gaussian Curvature Perturbations at Cubic Order
Joseph Bramante, Jason Kumar
We calculate non-Gaussianities in the bispectrum and trispectrum arising from the cubic term in the local expansion of the scalar curvature perturbation. We compute to three-loop o…
Probing Squeezed Bino-Slepton Spectra with the Large Hadron Collider
Bhaskar Dutta, Kebur Fantahun, Ashen Fernando +5
We consider a Minimal Supersymmetric Standard Model scenario in which the only light superparticles are a bino-like dark matter candidate and a nearly-degenerate slepton. It is not…
Direct Detection of Dynamical Dark Matter
Keith R. Dienes, Jason Kumar, Brooks Thomas
Dynamical dark matter (DDM) is an alternative framework for dark-matter physics in which the dark-matter candidate is an ensemble of constituent fields with differing masses, lifet…
Novel Dark Matter Models and Detection Strategies
Jason Kumar
We consider the impact of relaxing some typical assumptions about dark matter interactions, including isospin-invariance, elastic scattering and contact interactions. We show that…