A5015917162- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Distributed and Parallel Computing Systems
- Quantum Chromodynamics and Particle Interactions
- Black Holes and Theoretical Physics
- Muon and positron interactions and applications
- International Science and Diplomacy
- Climate Change Communication and Perception
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Numerical methods for differential equations
- Anomaly Detection Techniques and Applications
- Scientific Computing and Data Management
- Pulsars and Gravitational Waves Research
- Noncommutative and Quantum Gravity Theories
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
Harvard University
2021-2024
Purdue University West Lafayette
2024
Harvard University Press
2021-2022
Stony Brook University
2019-2020
Brookhaven National Laboratory
2019
University of Illinois Urbana-Champaign
2016-2018
The Standard Model effective field theory (SMEFT) provides a consistent framework for comparing precision measurements at the LHC to Model. observation of statistically significant nonzero SMEFT coefficients would correspond physics beyond (BSM) some sort. A more difficult question answer is what, if any, detailed information about nature underlying high scale model can be obtained from these measurements. In this work, we consider patterns operators present in five example models and...
We show that the recent excess presented by KOTO in their search for ${K}_{L}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ may be due to weakly coupled scalars produced from Kaon decays. study two concrete realizations, minimal Higgs portal and a hadrophilic scalar model, demonstrate they can explain observed events while satisfying existing limits. The simplicity of these models, possible relations interesting UV constructions, provides strong...
A bstract high energy muon collider can provide new and complementary discovery potential to the LHC or future hadron colliders. Leptoquarks are a motivated class of exotic physics models, with distinct production channels at lepton machines. We study vector leptoquark model $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt></mml:math> = 3 , 14 TeV within set both UV phenomenologically flavor scenarios. compute which mechanism has...
A bstract Anomaly detection relies on designing a score to determine whether particular event is uncharacteristic of given background distribution. One way define use autoencoders, which rely the ability reconstruct certain types data (background) but not others (signals). In this paper, we study some challenges associated with variational such as dependence hyperparameters and metric used, in context anomalous signal (top W ) jets QCD background. We find that hyperparameter choices strongly...
We propose a new beam-dump experiment at future TeV-scale muon collider. A beam dump would be an economical and effective way to increase the discovery potential of collider complex in complementary regime. In this Letter, we consider vector models such as dark photon L_{μ}-L_{τ} gauge boson physics candidates explore which novel regions parameter space can probed with dump. find that for model, gain sensitivity moderate mass (MeV-GeV) range both higher lower couplings compared existing...
The CDF Collaboration recently reported a new precise measurement of the $W$-boson mass ${M}_{W}$ with central value significantly larger than SM prediction. We explore effects including this on fit Standard Model (SM) to electroweak precision data. characterize tension and potential beyond phenomena within sector in terms oblique parameters $S$, $T$ $U$. show that large can be accommodated by large, nonzero $U$, which is difficult construct explicit models. Assuming $U=0$, strongly prefers...
The production of $W^{\pm}H$, $ZH$, $W^+W^-$, and $W^\pm Z$ pairs probes non-Standard-Model interactions quarks, gauge bosons, the Higgs boson. New effects can be parameterized in terms an effective field theory (EFT) where Lagrangian is expanded higher-dimension operators suppressed by increasing powers a high scale $\Lambda$. We examine importance including next-to-leading-order QCD corrections global fits to coefficients EFT. numerical implications on due different approaches enforcing...
The Standard Model effective field theory (SMEFT) is the tool of choice for studying deviations Higgs couplings from predictions. SMEFT an expansion in infinite tower higher dimension operators, which typically truncated at dimension-6. We consider including dimension-8 operators and examine matching to 2 Doublet (2HDM) that assumed be valid some high scale. Both limits direct production single bosons indirect on tri-linear coupling are considered context matched 2HDM, importance assumptions...
A bstract When the Froggatt-Nielsen mechanism is used to explain Standard Model flavor hierarchy, new physics couplings are also determined by horizontal symmetry. However, additional symmetries or dynamics in UV can sometimes lead a departure from this naïve scaling for couplings. We show that an effective way keep track of these changes using spurions U(3) 5 global symmetry, where we parameterize extra suppression enhancement factors, referred as wrinkles , same power counting parameter...
A bstract Simplified template cross sections define a framework for the measurement and dissemination of kinematic information in Higgs measurements. We benchmark currently proposed setup an analysis dimension-6 effective field theory operators W H production. Calculating Fisher allows us to quantify sensitivity this new physics study its dependence on phase space. New machine- learning techniques let compare simplified section full, high-dimensional information. show that way which we...
A search for Lorentz- and $CPT$-violating signals in the double beta decay spectrum of $^{136}\mathrm{Xe}$ has been performed using an exposure $100\text{ }\text{ }\mathrm{kg}\ifmmode\cdot\else\textperiodcentered\fi{}\mathrm{yr}$ with EXO-200 detector. No significant evidence spectral modification due to isotropic Lorentz-violation was found, a two-sided limit $\ensuremath{-}2.65\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}\text{...
A common lore has arisen that beyond the Standard Model (BSM) particles, which can be searched for at current and proposed experiments, should have flavorless or mostly third-generation interactions with quarks. This theoretical bias severely limits exploration of BSM phenomenology, is especially constraining extended Higgs sectors. Such limitations avoided in context Spontaneous Flavor Violation (SFV), a robust UV complete framework allows significant couplings to any up down-type quark,...
We investigate the role of anomalous gauge boson and fermion couplings in production $WZ$ ${W}^{+}{W}^{\ensuremath{-}}$ pairs at LHC to next-to-leading-order (NLO) QCD Standard Model effective field theory (SMEFT), including dimension-six operators. Our results are implemented a publicly available version powheg-box. combine our leptonic final state $e\ensuremath{\nu}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ with previous demonstrate numerical effects NLO corrections on...
We present a systematic spurion setup called aligned flavor violation (AFV) that allows for new physics couplings to quarks are with standard model (SM) Yukawa couplings, but do not necessarily share their hierarchies nor family universal. Additionally, we show there is an important subset of AFV spontaneous (SFV), which naturally arises from UV completions where the quark number and $CP$ groups spontaneously broken. Flavor-changing neutral currents strongly suppressed in SFV extensions SM....
The use of the Standard Model effective field theory Lagrangian to quantify possible Beyond (BSM) effects is standard in LHC and future collider studies. One usual assumptions truncate expansion with dimension-six operators. numerical impact next terms series, dimension-eight operators, unknown general. We consider a specific BSM model containing charge-$2/3$ heavy vectorlike quark compute operators generated at dimension eight. these are studied for $t\overline{t}h$ process, where they...
In the path towards a muon collider with center of mass energy 10 TeV or more, stage at 3 emerges as an appealing option. Reviewing physics potential such is main purpose this document. order to outline progression performances across stages, few sensitivity projections for higher are also presented. There many opportunities probing new collider. Some them in common extensively documented case CLIC stage, and include measuring Higgs trilinear coupling testing possible composite nature boson...
The scalar singlet model extends the Standard Model with addition of a new gauge scalar. We reexamine limits on from oblique parameter fits and global fit to precision electroweak observables present analytic expressions for our results. For case when is much heavier than weak scale, we map onto dimension-six effective field theory review allowed space unitarity considerations requirement that minimum be stable. A data, along LHC observables, used constrain parameters high scale model,...
The CDF collaboration recently reported a new precise measurement of the $W$ boson mass $M_W$ with central value significantly larger than SM prediction. We explore effects including this on fit Standard Model (SM) to electroweak precision data. characterize tension and potential beyond phenomena within sector in terms oblique parameters $S$, $T$ $U$. show that large can be accommodated by large, nonzero $U$, which is difficult construct explicit models. Assuming $U = 0$, strongly prefers...
A bstract muon collider would be a powerful probe of flavor violation in new physics. There is strong complementary case for measurements and precision low-energy probes lepton (as well as CP violation). We illustrate this by studying the reach supersymmetric scenario with flavor-violating slepton mixing. find that could discover sleptons measure neutralino masses high precision, enabling event reconstruction cleanly separate physics signals from Standard Model backgrounds. The discovery...
It was recently shown that domain walls from the spontaneous breaking of CP symmetry are exactly stable, and must be inflated away to recover a viable cosmology. We investigate phenomenological implications this result in Nelson--Barr solutions strong problem. Combined with upper bound on scale necessary suppress contributions dangerous, nonrenormalizable operators $\bar{\theta}$, puts an inflation reheating temperature after inflation. Minimal models therefore tension thermal leptogenesis,...
The two-Higgs doublet model (2HDM) is a well understood alternative to the Standard Model of particle physics. If new particles included in 2HDM are at an energy scale much greater than weak scale, theory can be matched effective field (SMEFT). We compute for first time complete one-loop matching dimension-6. compare its numerical impact with that tree-level dimension-8 by performing global fit single Higgs and precision electroweak measurements, we emphasize importance comparing SMEFT...
A future Higgs Factory will provide improved precision on measurements of couplings beyond those obtained by the LHC, and enable a broad range investigations across fields fundamental physics, including mechanism electroweak symmetry breaking, origin masses mixing particles, predominance matter over antimatter, nature dark matter. Future colliders measure to few per cent, giving window Standard Model (BSM) physics in 1-10 TeV range. In addition, they make precise width, characterize...
The currently unmeasured triple Higgs coupling is one of the strong motivations for future physics programs at LHC and beyond. A sufficiently precise measurement can lead to qualitative changes in our understanding electroweak symmetry breaking cosmological history potential. As such, quantitative this now benchmark measurements any proposed collider. We study capability a potential $27\,\mathrm{TeV}$ HE-LHC upgrade measuring trilinear via di-Higgs production process $b\bar{b}\gamma\gamma$...