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Denis Rathjens (Texas A & M University (US))5/23/24, 9:00 AM
Minimal non-thermal dark matter models are an attractive type of model, since they can potentially explain both the existence of dark matter as well as the baryon asymmetry in the universe. In this presentation, I focus on a type of model with two color-triplet iso-singlet scalars at TeV scale masses and a singlet Majorana fermion dark matter candidate at the GeV scale. A phenomenological...
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Zhongtian Dong (University of Kansas)5/23/24, 9:25 AM
Top quark polarization measurements provide observables that are sensitive to spin correlation measurements and new physics. The down-type fermion from the W decay is the most powerful spin analyzer from top, which is not straight forward to measure in hadronic decays. Most applications measure top quark spin via an optimal hadronic spin analyzer built from kinematics. In this talk, we discuss...
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Tao Han5/23/24, 9:50 AM
Quantum entanglement is a fundamental property of quantum mechanics. Recently, studies have explored entanglement in the $t\bar{t}$ system at the Large Hadron Collider (LHC) when both the top quark and anti-top quark decay leptonically. Entanglement is detected via correlations between the polarizations of the top and anti-top and these polarizations are measured through the angles of the...
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Mustafa Amin5/23/24, 10:45 AM
I will argue that if the density of dark matter in the early
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universe is dominated by subhorizon, non-relativistic field modes,
then there is a relatively model-independent lower bound on the
mass of dark matter particles $m > 10^{-19}\, {\rm eV}$. The bound comes from considerations of (observed lack of) suppression of structure due
to free streaming, and (observed lack of) an enhancement... -
Rouzbeh Allahverdi (University of New Mexico)5/23/24, 11:10 AM
String theory setups can accommodate superheavy dark matter with the correct relic abundance. In addition, they may induce tiny R-parity violating couplings which make dark matter unstable with a lifetime well above the age of the universe. In this talk, I will discuss the high-energy gamma ray and neutrino signals from various three-body decays of superheavy neutralinos. I will then show how...
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Barmak Shams Es Haghi (University of Texas at Austin)5/23/24, 11:35 AM
We investigate the influence of the reheating temperature of the visible sector on the freeze-in dark matter (DM) benchmark model for direct detection experiments, where DM production is mediated by an ultralight dark photon. Here we consider a new regime for this benchmark: we take the initial temperature of the thermal Standard Model (SM) bath to be below the DM mass. Then the production...
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Prof. Savvas Koushiappas (Brown University)5/23/24, 12:00 PM
I will discuss light dark matter candidates with kinetic coupling. More specifically, a condensate dark matter in a two-field model where the axion is coupled to a second moduli field at the level of its kinetic term. I will discuss cosmological consequences of such a dark matter candidate.
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Roshan Mammen Abraham (University of California Irvine (US))5/23/24, 2:00 PM
The recent observation of collider neutrinos and BSM searches for ALPs by the FASER collaboration highlights the potential the forward direction at the LHC has for neutrino physics and BSM studies. After briefly reviewing some of the FASER collaboration's recent results, I will present some of my own work on the phenomenological studies of the electromagnetic properties of neutrinos, namely...
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Kevin Pedro (Fermi National Accelerator Lab. (US))5/23/24, 2:25 PM
There has been a surge of interest in hidden valley models with new, strong forces, sometimes called "dark QCD". These models propose asymmetric, composite dark matter in the form of "dark hadrons" that would evade direct and indirect bounds as well as typical collider DM searches for large missing transverse momentum accompanied by radiation. However, evidence of these models can still be...
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Prof. Jae Yu (University of Texas at Arlington (US))5/23/24, 2:50 PM
Dark matter is thought to make up 25% of the universe. Dark sector particles (DSP) do not interact through the known forces but could be weakly coupled to Standard Model particles through a portal or a mediator. Many searches for dark matter/dark sector particles at an accelerator thus far seem to face a ceiling that the sensitivity reach is greatly limited, beyond statistical effects. DAMSA...
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Matheus Hostert5/23/24, 3:15 PM
In this talk, I will discuss examples of flavor-violating light new physics and how it can impact experiments like Mu3e, Mu2e, as well as neutrino experiments. Among the scenarios I will discuss include long-lived particles that can be abundantly produced at spallation sources and detected through their visible decays in neutrino experiments.
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Viviana Cavaliere (Brookhaven National Lab)5/23/24, 4:10 PM
I will discuss measurements of Higgs boson properties with the ATLAS and CMS experiments.
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Hyunyong Kim (Texas A & M University (US))5/23/24, 4:35 PM
Several theories beyond the Standard Model (BSM) suggest an expanded Higgs sector, prompting investigations for neutral and charged Higgs bosons in addition to the one observed at 125 GeV. The completion of Run 2 of the LHC in 2018 yielded a total of 139 fb^−1 of data, offering an opportunity to delve deeper into the BSM Higgs parameter space. This presentation covers the searches for BSM...
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Jason Veatch (California State University (US))5/23/24, 5:00 PM
The Standard Model predicts non-resonant production of Higgs boson pairs, which provides a handle to directly measure the shape of the Higgs potential. Numerous BSM models predict new scalar fields with couplings that lead to the simultaneous production of scalar bosons. The ATLAS and CMS Collaborations have active search programs targeting multi-scalar-boson production. This talk provides and...
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Joel Meyers (Southern Methodist University)5/23/24, 5:25 PM
The most precise determination of the sum of neutrino masses from cosmological data, derived from analysis of the cosmic microwave background and recent baryon acoustic acoustic oscillations data from DESI, favors a value below the minimum inferred from neutrino flavor oscillation experiments. The sum of neutrino mass is determined in cosmology from the suppression of matter clustering in the...
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Deepak Sathyan5/23/24, 5:50 PM
We present a comprehensive analysis of nonstandard neutrino interactions with the dark sector in an effective field theory (EFT) framework, considering {\it exact} analytic formulae for the differential scattering cross sections of neutrinos with scalar, fermionic, and vector dark matter (DM) for dark sector models with mediators of different spins. We then implement the full catalog of...
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Angelo Di Canto (Brookhaven National Laboratory (US))5/24/24, 9:00 AM
The Belle II experiment has collected 424 fb$^{-1}$ sample of $e^+e^-$ collisions produced by the asymmetric SuperKEKB collider, at a centre-of-mass energy equal to or near the mass of the $\Upsilon(4S)$ resonance. Ninety-percent of the sample is at the $\Upsilon(4S)$ resonance, which decays to $B$-meson pairs. The predecessor experiment, Belle, collected nearly $1~{\rm ab}^{-1}$ of data from...
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Prof. Fred Olness (Southern Methodist University (US))5/24/24, 9:25 AM
With the HL-LHC and EIC on the horizon, high-precision measurements are paramount to both SM and BSM studies. As PDF uncertainty is often a limiting factor, our goal is not only to ‘fit’ PDFs but also to better understand the underlying process at the precision level. We describe ongoing projects within both the nCTEQ and BNL-based SURGE project as we explore and characterize the full...
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Prof. Pavel Nadolsky (Southern Methodist University)5/24/24, 9:50 AM
On the example of recent work by the CTEQ-TEA group, I discuss the progress on precision parton distribution functions (PDFs) in the proton. I particularly emphasize new insights on quantification of uncertainties on PDFs that affect key electroweak and Higgs precision studies at the HL-LHC.
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Baishan Hu5/24/24, 10:45 AM
Over the past decades, ab initio nuclear calculation has made dramatic progress, especially reaching the heavy mass region as 208Pb recently. This means that it becomes possible to obtain first-principles computation (with quantified uncertainties) of quantities which even reside in the heavy-mass region. The quantities include these relevant for astrophysics and searches for physics beyond...
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Shirley Li (UC Irvine)5/24/24, 11:10 AM
The standard calculations of neutrino oscillation are predicated on the assumption that neutrinos' wave packets maintain coherence throughout their propagation. Effects associated with neutrinos wave packets decoherence--- specifically, damping of the oscillation probabilities---were considered unobservable in terrestrial experiments. However, recent claims suggest that if sterile neutrinos...
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Zahra Khajeh Tabrizi5/24/24, 11:35 AM
Neutrino physics is advancing into a precision era with the construction of new experiments, particularly in the few GeV energy range. Within this energy range, neutrinos exhibit diverse interactions with nucleons and nuclei. In this talk I will delve in particular into neutrino–nucleus quasi-elastic cross sections, taking into account both standard and, for the first time, non-standard...
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Min-Gwa Park (Jeonbuk National University)5/24/24, 12:00 PM
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Prof. Kimberly Boddy (University of Texas at Austin)5/24/24, 2:00 PM
Cosmological and astrophysical observations provide a unique opportunity to probe the fundamental properties of dark matter. Dark matter interactions with the Standard Model of particle physics, for example, can alter predictions from the standard cosmological model, permitting robust tests of new dark matter physics. In this talk, I will describe the impact that dark matter interactions have...
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Keith R. Dienes (University of Arizona)5/24/24, 2:25 PM
Many theories of physics beyond the Standard Model give rise to a unique early-universe cosmology during which the abundances of different energy components such as matter, radiation, and vacuum energy remain constant across extended cosmological eras, even though the universe is expanding. Even more surprisingly, such “stasis” epochs are actually universal attractors, with the universe...
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Brooks Thomas5/24/24, 2:50 PM
It has recently been realized that many extensions of the Standard Model give rise to cosmological histories exhibiting extended epochs of cosmological stasis — epochs wherein the abundances of multiple energy components (such as matter, radiation, or vacuum energy) remain effectively constant despite cosmological expansion. In this talk, I shall discuss a novel realization of stasis involving...
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Dr Chee Sheng Fong (Universidade de São Paulo)5/24/24, 3:15 PM
In this talk, we will look at the role of primordial black holes in sourcing the cosmic baryon as well as dark matter abundance.
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Kuver Sinha (University of Oklahoma)5/24/24, 4:10 PM
Future gravitational wave detectors probing the mHz - nHz frequency range will provide a unique opportunity for BSM physicists to study new physics. Neutron star and white dwarf mergers can serve as axion probes, while extreme mass ratio inspirals can constrain dark forces. Gravitational wave detectors will also probe early first order phase transitions. I will discuss some ongoing work and...
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Tao Xu (The University of Oklahoma)5/24/24, 4:35 PM
The observation of gravitational waves opens a new window for exploring astrophysics and cosmology. These messengers enable the concurrent measurement of their amplitudes and phases, facilitating a precise analysis of wave production and propagation. In this talk, I will demonstrate how gravitational waves can be utilized to study the properties of dark matter. Specifically, I will use wave...
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Cash Hauptmann5/24/24, 5:00 PM
Any particle physics model exhibiting symmetry breaking is necessarily accompanied by a phase transition taking the particle content of the universe from its initially symmetric phase to one where the underlying gauge symmetry is “broken”. First-order phase transitions (FOPTs) are characterized by the rapid expansion of bubbles containing the new broken phase, which nucleate stochastically...
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Dorival Gonçalves (Oklahoma State University)5/24/24, 5:25 PM
The knowledge of the Higgs potential is crucial for understanding the origin of mass and the thermal history of our Universe. We show how collider measurements and observations of stochastic gravitational wave signals can complement each other to explore the multiform scalar potential in the two Higgs doublet model. In our investigation, we analyze critical elements of the Higgs potential to...
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Adrian Thompson5/25/24, 9:00 AM
In this work, we explore baryon number violating interactions (BNV) within a specific model framework involving a charged iso-singlet, color-triplet scalar and a Majorana fermion with interactions in the quark sector. This model has been useful for explaining baryogenesis, neutron-antineutron oscillations, and other puzzles such as the DM-baryon coincidence puzzle. We revisit this model, with...
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Nicholas Rodd5/25/24, 9:25 AM
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Prof. Flip Tanedo (UC Riverside)5/25/24, 9:50 AM
Pre-stellar galactic halos are highly sensitive to soft radiation: the presence of sources of O(10 eV) Lyman-Werner radiation changes the gas chemistry and prevent the standard fragmentation of the gas. Rather than producing Population III stars, this may instead lead to direct collapse black holes. Observations of supermassive black holes at high redshift have long been suspected to be...
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Luca Lavezzo (MIT)5/25/24, 10:45 AM
I will discuss the LHC search efforts for dark matter and dark-sector particles.
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Prof. Jong-Chul Park (Chungnam National University (KR))5/25/24, 11:10 AM
We propose a novel method to determine the mass scale of ambient dark matter that can be generally applied to the (at least effectively) two-dimensional direct detection experiments allowing for directional observables.
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Ryan Plestid5/25/24, 11:35 AM
Ultralight dark matter (ULDM) must be bosonic, and the arguably simplest model is furnished by a scalar field that is uncharged under the Standard Model gauge group oscillating in a harmonic potential. This field will generically couple to other BSM singlet states such as sterile neutrinos or other progenitors of neutrino mass. In this talk I will discuss how interactions between ULDM and...
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Anupam Ray5/25/24, 12:00 PM
A sub-component of dark matter with a short collision length compared to a planetary size leads to efficient accumulation of dark matter in astrophysical bodies. Such particles represent an interesting physics target since they can evade existing bounds from direct detection due to their rapid thermalization in high-density environments. In this talk, I will show that their annihilation to...
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Prof. Yue Zhang5/25/24, 2:00 PM
Sterile neutrino, a gauge-singlet fermion with a small active neutrino mixture, is a simple and one of the oldest dark matter candidates. In its first incarnation, proposed by Dodelson and Widrow, sterile neutrino dark matter can be produced via neutrino oscillation in the early universe, which is a very elegant mechanism. However, it has been completely ruled out by astrophysical observations...
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Prof. Seodong Shin (Jeonbuk National University)5/25/24, 2:25 PM
In this talk, I will discuss the potential of current/future tau neutrino experiments in probing new physics beyond the Standard Model. A focus will be given to a tau neutrino-philic new particle that can play an important role in the evolution of early Universe.
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Bhupal Dev (Washington University in St. Louis)5/25/24, 2:50 PM
The sources of the high-energy neutrino events detected by IceCube remain largely unknown. A more precise neutrino flavor ratio measurement in the future will be crucial in resolving this open question. We discuss how the flavor ratio gets modified in presence of matter effects for Active Galactic Nuclei (AGNs) which are currently the most promising astrophysical candidate sources. We show...
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Prof. Frank F Deppisch5/25/24, 3:15 PM
Neutrinoless double beta decay is the primary means with which we can probe a potential Majorana nature of light neutrinos. Planned experiments searching for this hypothetical decay aim to be sensitive to half-lives of up to 10^28 years, allowing to probe Majorana neutrino mass scales of O(10 meV). It is also well established that neutrinoless double beta decay receives contributions beyond...
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Todd Adams (Florida State University (US))5/25/24, 4:10 PM
Over the past decade the LHC collaborations have developed an extensive program of searches for new, long-lived particles produced in proton-proton collisions. These searches probe phase space where new physics could be hiding. I will review some of the newest results from the LHC collaborations.
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Hector De La Torre Perez (Northern Illinois University (US))5/25/24, 4:35 PM
Talk on behalf of the ATLAS and CMS Collaborations
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Kaustubh Agashe5/25/24, 5:00 PM
Simple modifications of existing extensions of the Standard Model (SM) can dramatically alter its signals at the LHC. We illustrate this general point within the specific framework of SM fields propagating in a warped extra dimension, which can address both the Planck-weak and flavor hierarchy problems of the SM. We consider the possibility that,
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among the SM particles, only the gauge bosons... -
Ian Lewis (The University of Kansas)5/25/24, 5:25 PM
We present a comprehensive study on how to distinguish the properties of heavy dijet resonances at hadron colliders. A variety of spins, chiral couplings, charges, and QCD color representations are considered. Distinguishing the different color representations is particularly difficult at hadron colliders. To determine the QCD color structure, we consider a third jet radiated in a resonant...
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Kaladi Babu5/26/24, 9:00 AM
I will discuss the axion quality problem.
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Fazlollah Hajkarim (University of Oklahoma)5/26/24, 9:25 AM
We derive new constraints on axion-like particles (ALPs) using precision $X$-ray polarization studies of magnetars. Specifically, we use the first detection of polarized $X$-rays from the magnetars 4U 0142+61 and 1RXS J170849.0-400910 by the Imaging $X$-ray Polarimetry Explorer (IXPE) to place bounds on the product of the ALP-photon and ALP-nucleon couplings, $g_{a\gamma}g_{aN}$, with $g_{aN}$...
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Andrew Long (Rice University)5/26/24, 9:50 AM
A cosmological network of axion strings in our Universe today may leave its imprint on the polarization pattern of the cosmic microwave background radiation through the phenomenon of axion-string-induced birefringence. I will explain how this signal arises, discuss how it depends on the properties of the string network and the axion-photon coupling, describe how existing measurements of...
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Jason Kumar5/26/24, 10:15 AM
We consider the effect of isospin-violating dark matter-nucleon interactions on direct detection constraints in the regime of small dark matter mass and large scattering cross section. Isospin-violation can lead to both reductions in sensitivity (due to a reduced cross section for scattering with nuclei in the detector) and enhancements in sensitivity (due to a reduced cross section for...
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Kate Scholberg
I will present an overview of recent results from the COHERENT experiment.
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Prof. Flip Tanedo (UC Riverside)
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