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Rabindra Mohapatra16/05/2023, 09:30
I discuss parity solutions to the strong CP problem which do not need an axion. It is implemented within the context of left-right symmetric models with minimal Higgs content and the universal seesaw mechanism using vector like fermions to generate quark and lepton masses. I discuss a way to understand the origin of matter-anti-matter asymmetry in these models using Affleck-Dine (AD)...
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Peisi Huang16/05/2023, 09:55
In this talk, I will present a new scenario of leptogenesis, which is triggered by a first-order phase transition (FOPT). The right-handed neutrinos (RHNs) are massless in the old vacuum, while they acquire a mass in the new vacuum bubbles, and the mass gap is huge compared with the FOPT temperature. The ultra-relativistic bubble walls sweep the RHNs into the bubbles, where the RHNs experience...
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Adrienne Erickcek16/05/2023, 10:20
As remnants of the earliest stages of structure formation, the smallest dark matter halos provide a unique probe of the evolution of the Universe prior to the onset of Big Bang nucleosynthesis (BBN). I will discuss how the pre-BBN expansion history can enhance the microhalo population, thereby boosting the dark matter annihilation rate if dark matter is a thermal relic. The amplitude of this...
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Prof. Jae Yu (University of Texas at Arlington (US))16/05/2023, 11:15
The neutrino oscillation needs parameters to be measured precisely to provide essential information for a modification of the Standard Model. Accomplishing this novel goal in future neutrino experiments requires high flux neutrino beams and powerful combination of near and far detectors. Fermilab’s PIP-II LINAC is an essential element in providing high flux protons to the Long Baseline...
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Joshua Berger (Colorado State University)16/05/2023, 11:50
Neutrino experiments will have leading sensitivity to several dark matter and dark sector models. I discuss signals from a range of different dark sector models, from induced nucleon decay in mesogenesis models to production, scattering, and decay of dark sector states in neutrino beams. I present simulation tools for boosted dark matter and induced nucleon decay signals. I discuss some...
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Deepak Kar (University of the Witwatersrand (ZA))16/05/2023, 14:05
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Ian Lewis (The University of Kansas)16/05/2023, 14:30
Many new physics scenarios predict multi-photon Higgs resonances. One such scenario is the dark axion portal model. The primary decay chain that we study is the Higgs to dark photon ($\gamma_D$) pairs that subsequently decay into a photon ($\gamma$) and an axion-like particle ($a$). The axion-like particles then decay into photon pairs. Hence, the signal is a six-photon Higgs decay:...
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Deion Elgin Fellers (University of Oregon (US))16/05/2023, 14:55
This talk will present the first physics results of the FASER experiment, where we were the first to directly observe neutrino interactions at a particle collider experiment and also probed previously unconstrained phase space of the dark photon with couplings $ϵ∼10^{-5}−10^{-4}$ and masses ∼10 MeV - 100 MeV. FASER is an experiment dedicated to searching for light, extremely weakly-interacting...
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Hyunyong Kim (Texas A & M University (US))16/05/2023, 15:20
Despite the current standard model of particle physics has been highly successful, there are still unanswered questions surrounding dark matter. This suggests that new physics beyond the standard model may be discovered at the Large Hadron Collider. In my talk, I will focus on the search for the dark sector using a novel concept of beam dump experiments at the CMS experiment. While this...
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Jason Robert Veatch (California State University (US))16/05/2023, 16:15
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George Hou (National Taiwan University (TW))16/05/2023, 16:40
We study charged Higgs boson search via $e^+e^− \to H^+H^− \to c\bar b \bar cb$
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at the 500 GeV ILC. In a general two Higgs doublet model without $Z_2$ symmetry,
extra Yukawa couplings $\rho_{tt}$ and $\rho_{tc}$ can drive baryogenesis, but
searches at the HL-LHC may still go empty-handed if the couplings are relatively
weak. Taking $m_{H^+} \simeq m_H \simeq m_A \sim 200$ GeV, with... -
Tao Han16/05/2023, 17:05
The mechanism of fermion mass generation via the Higgs Yukawa interactions remains to be mysterious because of the large mass hierarchies, many free parameters, and their arbitrary flavor mixing patterns. Scrutinizing the fermionic sector associated with the Higgs properties is of high priority. In this talk, I reiterate the fermion mass and flavor puzzles. I propose some experimental studies...
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Taewook Youn (University of Texas at Austin)16/05/2023, 17:30
In this talk, we present a new interacting dark sector model, Stepped Partially Acoustic Dark Matter (SPartAcous), that can tackle two major issues in current cosmological data, namely the $H_0$ and $S_8$ problems. Similar to Partially Acoustic Dark Matter (PAcDM), this model involves a part of dark matter that interacts with dark radiation at high temperatures, resulting in a decrease in the...
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Francesc Ferrer Escursell17/05/2023, 09:30
The flux of high energy neutrinos and photons produced in a blazar could get attenuated when they propagate through the dark matter spike around the central black hole and the halo of the host galaxy. Using the observation by IceCube of a few high-energy neutrino events from TXS 0506+056, and their coincident gamma ray events, we obtain new constraints on the dark matter-neutrino and dark...
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Bhupal Dev (Washington University in St. Louis)17/05/2023, 09:55
Whether neutrinos are Majorana or Dirac particles is an open question. Theoretically, it is also possible that neutrinos are pseudo-Dirac, which are fundamentally Majorana fermions, but essentially act like Dirac fermions in most experimental settings, due to extremely small active-sterile mass splitting. Such small values of mass splitting can only be accessed via active-sterile oscillations...
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Michael Graesser17/05/2023, 10:20
Dark sectors with Abelian gauge symmetries can interact with ordinary matter via kinetic mixing. In such scenarios, magnetic monopoles of a broken dark U (1) will appear in our sector as confined milli-magnetically charged objects under ordinary electromagnetism. If these states contribute sizably to the local dark matter density, they extract significant energy from the galactic magnetic...
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Ashutosh Kotwal (Duke University (US))17/05/2023, 11:15
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David Toback (Texas A & M University (US))17/05/2023, 11:35
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Lorenzo Ricci17/05/2023, 11:50
The precise measurement of the Standard Model parameters is not only a consistency check of the SM itself, but it also represents a powerful probe for New Physics. This is well known in the case of heavy new physics, that might show-up indirectly by modifying the relations among the SM parameters.
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On different lines, we argue that precise SM measurements can also be repurposed to constrain... -
Zhen Liu (University of Minnesota (US))17/05/2023, 12:15
The future high-energy muon colliders, featuring both high energy and low background, could play a critical role in our searches for new physics. The smallness of neutrino mass is a puzzle of particle physics. Broad classes of solutions to the neutrino puzzles can be best tested by seeking the partners of SM light neutrinos, dubbed as heavy neutral leptons (HNLs), at muon colliders.
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We can... -
Atanu Pathak (Purdue University Northwest (US))17/05/2023, 14:05
Many physics models beyond the Standard Model predict heavy new particles preferentially decaying to at least one top quark. This talk will present searches for Leptoquark/Vector-like quark/new resonances decaying into at least one top quark in pp collision at a center-of-mass energy of 13 TeV at the CMS and ATLAS detectors at the LHC.
The searches use the data set collected with the CMS or...
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Mr Soumyananda Goswami (Oklahoma State University (US))17/05/2023, 14:30
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Kaladi Babu17/05/2023, 14:55
Observation of lepton number (L) violation by two units at colliders would provide evidence for the Majorana nature of neutrinos. We study signals of L-violation in the context of two popular models of neutrino masses, the type-II seesaw model and the Zee model, wherein small neutrino masses arise at the tree-level and one-loop level, respectively. We focus on L-violation signals at the LHC...
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Dorival Gonçalves (Oklahoma State University)17/05/2023, 15:20
The Large Hadron Collider provides a unique environment to study quantum entanglement and violation of Bell's inequalities at the highest energy available today. In this talk, we will discuss the possible observation of these quantum correlations with top quark pair production, which represents a system of two-qubits. Our study focus on the semi-leptonic top pair channel. They indicate that...
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Kaustubh Agashe17/05/2023, 16:15
We develop a method for the determination of the top quark mass using the distribution of the decay length of the B-hadrons originating from its decay. This technique is based on our earlier observation regarding the location of the peak of the b quark energy distribution. Such "energy-peak" methods enjoy a greater degree of model-independence with respect to the kinematics of top quark...
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Andrew Larkoski (UCLA)17/05/2023, 16:40
The jet charge is an old observable that has proven uniquely useful for discrimination of jets initiated by different flavors of light quarks, for example. In this talk, I propose an approach to understanding the jet charge by establishing simple, robust assumptions that hold to good approximation non-perturbatively, such as isospin conservation and large particle multiplicity in the jets,...
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Prof. Joel Walker (Sam Houston State University)17/05/2023, 17:05
We describe a new jet clustering algorithm named SIFT (Scale-Invariant Filtered Tree) that maintains the resolution of substructure for collimated decay products at large boosts. The scale-invariant measure combines properties of kT and anti-kT by preferring early association of soft radiation with a resilient hard axis, while avoiding the specification of a fixed cone size. Integrated...
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Minho SON17/05/2023, 17:30
We will discuss about the electroweak dilepton production with two forward jets at the LHC, aiming to measure the anomalous triple gauge couplings in the Effective Field Theory (EFT) approach. This process provides a new example where the interference between Standard Model (SM) and beyond the SM is resurrected in the inclusive cross section of the full amplitude, including two forward jets....
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Patrick James Fox18/05/2023, 09:30
Axion-like dark matter whose symmetry breaking occurs after the end of inflation predicts enhanced primordial density fluctuations at small scales. This leads to dense axion minihalos (or miniclusters) forming early in the history of the Universe. Condensation of axions in the minihalos leads to the formation and subsequent growth of axion stars at the cores of these halos. If, like the QCD...
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Felix Yu (Johannes Gutenberg University Mainz)18/05/2023, 09:55
In [1] and [2], my co-authors and I revisit the the field theory of axion model building from two separate perspectives. We first considered [1] the effects of small-size instantons arising from enlarged color gauge groups on the QCD axion mass, reaffirming earlier results that QCD axion masses can be parametrically heavier than vanilla models when the confinement effects of the extended...
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Tao Xu (The University of Oklahoma)18/05/2023, 10:20
Asteroid-mass primordial black holes (PBH) can make up a fraction or all of dark matter. Their Hawking radiation process offers a novel channel to produce new particles, which is especially interesting if these particles are mostly secluded from the Standard Model sector. Future MeV gamma-ray telescopes provide exciting prospects for detecting the Hawking radiation signal from asteroid-mass...
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Prof. Vera Gluscevic (University of Southern California)18/05/2023, 11:15
Cosmological observables, from the CMB anisotropy to the census of galaxies in the local universe, offer the most direct and broad tests for the nature of dark matter, including a number of scenarios that are challenging or even impossible to test in a laboratory setting. I will review the status of the recent early-universe and late-universe searches for the identity of dark matter,...
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Can Kilic18/05/2023, 11:40
I will discuss a model where dark matter is a composite state in a hidden sector, interacting with the Standard Model via the neutrino portal. The composite states in the hidden sector interpolated by the portal act as singlet neutrinos, which can naturally explain the existence of small but nonzero neutrino masses via the inverse seesaw mechanism. I will describe the existing constraints on...
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Brian Thomas Batell18/05/2023, 12:05
A light singlet scalar field feebly coupled through the super-renormalizable Higgs portal provides a minimal and well-motivated realization of ultra-light bosonic dark matter. We study the cosmological production of dark matter in this model by elucidating the dynamics of two sources of scalar field misalignment generated during the radiation era. For relatively large masses, dark matter is...
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Aaron Zimmerman18/05/2023, 14:05
The final phase of gravitational radiation from black hole binaries is the ringdown of the merged black holes, which occurs at a characteristic set of frequencies. Measurements of the ringdown spectrum can provide especially clean tests of the nature of the final black hole, potentially revealing violations of the famous ``no-hair'' theorem. The large number of gravitational wave observations...
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Kuver Sinha (University of Oklahoma)18/05/2023, 14:30
We use multimessenger observations of the neutron star merger event GW170817 to derive the first merger constraints on axion-like particles (ALPs) coupling to photons. ALP production from Primakoff and photon coalescence processes is calculated; then, the region of parameter space where ALPs can escape the remnant and decay back into two photons is considered. This gives rise to an ALP-induced...
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Jae Hyeok Chang (JHU/UMD)18/05/2023, 14:55
We initiate a study of the gravitational wave signatures of a phase transition that occurs as the Universe's temperature increases during reheating. The gravitational wave signatures of a heating phase transition are different from those of a cooling phase transition and observation of them would allow us to probe reheating. In the lucky case that the gravitational wave signatures from both...
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Savvas Koushiappas, Savvas Koushiappas (Brown University)18/05/2023, 15:20
In the last few years increased precision of experimental data led to challenges to ΛCDM. The dynamics of the expansion and the statistics of the growth of structure appear to be in tension between local measurements and inference from the CMB. I will discuss the H0 and S8 tensions and discuss new physics solutions in the context of dark matter/energy and quantum gravity.
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Zackaria Chacko (University of Maryland, College Park)18/05/2023, 16:15
I discuss the cosmological signals of theories in which the neutrinos decay into invisible dark radiation after becoming nonrelativistic. I show that, in this scenario, near-future large-scale structure measurements from the Euclid satellite, when combined with cosmic microwave background data from Planck, may allow an independent determination of both the lifetime of the neutrinos and the sum...
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Justin Mueller18/05/2023, 16:40
The ICARUS T600 LArTPC detector successfully ran for three years at the underground LNGS laboratories, providing a first sensitive search for LSND-like anomalous electron neutrino appearance in the CNGS beam. After a significant overhauling at CERN, the T600 detector has been placed in its experimental hall at Fermilab, fully commissioned, and the first events observed with full detector...
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Pedro Machado (Fermilab)18/05/2023, 17:05
I will discuss atmospheric neutrino measurements in DUNE and HK. I will discuss sub-GeV atmospheric neutrinos and how they can be used to measure $\delta_{CP}$; Earth tomography measurements, and the impact of solar cycles in the time modulation of atmospheric neutrinos.
Most will be based on 1904.02751, 2110.00003, and 2304.04689.
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Chee Sheng Fong (Universidade Federal do ABC)18/05/2023, 17:30
While the standard 3-flavor neutrino oscillation scenario is well-established, the mechanism behind neutrino mass is not yet pinned down experimentally. In fact, some new physics (related or not related to new physics behind neutrino mass) can modify the standard 3-flavor neutrino oscillation paradigm. We introduce an analytical solution for n-flavor neutrino oscillation in an arbitrary matter...
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Janina Hakenmüller (Duke University)19/05/2023, 09:30
Coherent elastic neutrino nucleus scattering (CE$\nu$NS) is a standard-model interaction in which the neutrino interacts with the nucleus as a whole. It was first measured by the COHERENT collaboration in 2017 decades after its prediction.
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A coherent interaction is only possible at neutrino energies of a few tens of MeV or below, which makes the Spallation Neutron Source (SNS) at Oak Ridge... -
Oleksandr Tomalak19/05/2023, 09:55
We study radiative corrections to the neutron beta decay within the top-down effective field theory approach. First, we match the Standard Model to the four-fermion effective field theory specifying the scheme dependence of the Wilson coefficients. To evaluate radiative corrections at scales of the neutron decay, we perform matching to the heavy-baryon chiral perturbation theory for the vector...
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Tianjun Li19/05/2023, 10:20
A number of nuclear decay anomalies have been reported in the literature, which purport to show periodic variations in the decay rates of certain radioisotopes. If these reports reflect reality, they would necessitate a seismic shift in our understanding of fundamental physics. We provide the first mechanism to explain these findings, via the misalignment mechanism of QCD axion dark matter,...
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52. Stasis in an Expanding Universe: Overview, Concrete Realizations, and Observational ConsequencesBrooks Thomas19/05/2023, 11:15
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Rouzbeh Allahverdi (University of New Mexico)19/05/2023, 11:40
A minimal extension of the standard model is presented that includes a long-lived fermion with weak-scale mass and an O(GeV) fermionic dark matter candidate. Decays of a TeV-scale colored scalar in a radiation-dominated phase bring the former to a thermal abundance while also producing dark matter. The long-lived fermion then drives a period of early matter domination and decays to reheat the...
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Ian Shoemaker (Virginia Tech)
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Keith Dienes (University of Arizona)
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