Conveners
Beyond Standard Model: BSM 1G
- Pavel Fileviez Perez (Case Western Reserve University)
- Ryan Sangwoo Kim (Florida State University (US))
- Ben Carlson (University of Pittsburgh)
Beyond Standard Model: BSM 1A
- Elodie Deborah Resseguie (Lawrence Berkeley National Lab. (US))
- Sabyasachi Chakraborty (Florida State University)
- Tova Ray Holmes (University of Tennessee (US))
Beyond Standard Model: BSM 2G
- Ben Carlson (University of Pittsburgh)
- Bryan Field (Farmingdale State College (US))
- Suho Kim (Florida State University (US))
Beyond Standard Model: BSM 2L
- Andrew Warren Askew (Florida State University (US))
- Jeff Dandoy (University of Pennsylvania (US))
- Doreen Wackeroth (SUNY Buffalo)
Beyond Standard Model: BSM 2A
- Marc Sher (William and Mary College)
- Nicholas Bower (Florida State University (US))
- Zijun Xu (SLAC National Accelerator Laboratory (US))
Beyond Standard Model: BSM 3L
- Jeff Dandoy (University of Pennsylvania (US))
- Evelyn Jean Thomson (University of Pennsylvania (US))
Beyond Standard Model: BSM 3G
- Marco Montella (Ohio State University (US))
- Todd Adams (Florida State University (US))
Beyond Standard Model: BSM 3A
- Meenakshi Narain (Brown University (US))
- Elodie Deborah Resseguie (Lawrence Berkeley National Lab. (US))
Beyond Standard Model: BSM 4A
- Marc Sher (William and Mary College)
- Alexis Plascencia (Case Western Reserve University)
Beyond Standard Model: BSM 4G
- Marco Montella (Ohio State University (US))
- Meenakshi Narain (Brown University (US))
Beyond Standard Model: BSM 5A
- Evelyn Jean Thomson (University of Pennsylvania (US))
- Jeff Dandoy (University of Pennsylvania (US))
Beyond Standard Model: BSM 5G
- Marc Sher (William and Mary College)
- Alexis Plascencia (Case Western Reserve University)
Beyond Standard Model: BSM 5L
- Ian Lewis (The University of Kansas)
- Wasikul Islam (University of Wisconsin-Madison (US))
Beyond Standard Model: BSM 6L
- Wasikul Islam (University of Wisconsin-Madison (US))
- Marc Sher (William and Mary College)
Beyond Standard Model: BSM 6G
- Nathaniel Craig (UC Santa Barbara)
Beyond Standard Model: BSM 6A
- Zhen Liu (University of Minnesota)
- Karri Folan Di Petrillo (Fermi National Accelerator Lab. (US))
A Left-Right Symmetric Model which utilizes VLFs to generate fermion masses via a universal see-saw mechanism is studied. In this talk, I will present the latest results of our analysis on the flavor observables constraining the model. Cabibbo anomaly can be easily resolved in this model, thereby predicting the mass of vector-like quarks. Further, I will discuss the possibility of explaining...
A search is presented for chargino pair-production and chargino-neutralino production, where the almost mass-degenerate chargino and neutralino each decay via $R$-Parity-violating couplings to a boson ($W/Z/H$) and a charged lepton or neutrino. This analysis searches for a trilepton invariant mass resonance in data corresponding to an integrated luminosity of 139 fb$^{-1}$ recorded in...
The discovery of a Higgs boson with mass near 125 GeV in 2012 marked one of the most important milestones in particle physics. The low mass of this Higgs boson with diverging loop corrections adds motivation to look for new physics Beyond the Standard Model (BSM). Several BSM theories introduced new heavy quark partners, called vector-like quarks (VLQ), with mass at the TeV scale. In...
Vector-like quarks (VLQ) are predicted in many extensions to the Standard Model (SM), especially those aimed at solving the hierarchy problem. Their vector-like nature allows them to extend the SM while still being compatible with electroweak sector measurements. In many models, VLQs decay to a SM boson and to a third-generation quark. Pair production of VLQ provides a model-independent method...
A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137 fb-1. The...
We present the status of our all-hadronic analysis in search of pair-produced Vector-Like Quarks (VLQs) using the Boosted Event Shape Tagger (BEST) with the CMS detector using 137 $fb^{-1}$ of $\sqrt{s} = 13$ TeV proton-proton collisions at the LHC. VLQs are motivated by models which predict compositeness of the scalar Higgs boson, and which avoid increasing constraints from Higgs...
With several recent anomalies observed that are in tension with the Standard Model, and with no clear roadmap to the source of new physics, this is an exciting time to explore for new particles at the LHC. Supersymmetry (SUSY) is an elegant solution to many of the Standard Model mysteries, and SUSY models with electroweakly produced sparticles are particularly interesting as possible...
In many models that address the naturalness problem, top-quark partners are often postulated in order to cure the issue related to the quadratic corrections of the mass of the Higgs boson. In this work, we study alternative modes for the production of top- and bottom-quark partners ($T$ and $B$), $pp\rightarrow B$ and $pp\rightarrow T\bar{t}$, via a chromo-magnetic moment coupling. We adopt...
Minimal Supersymmetric Standard Model (MSSM) is one of the most well-motivated and well-studied scenarios for going beyond the Standard Model (SM). Apart from solving the hierarchy problem, one of the primary motivations is the presence of a suitable dark matter (DM) candidate, namely the lightest neutralino, in the particle spectrum of SUSY. Measurement of DM relic density of the universe by...
The recently updated measurement of the muon anomalous magnetic moment strengthens the motivations for new particles beyond the Standard Model. We discuss two well-motivated 2HDM scenarios with vectorlike leptons as well as the Standard Model extended with vectorlike lepton doublets and singlets as possible explanations for the anomalous measurement. In these models we find that, with...
A search for supersymmetry involving the pair production of gluions decaying via stop quarks into the lightest neutralino $\tilde{\chi}^{0}_{1}$ is reported. It uses LHC $pp$ collision data at $\sqrt{s}\ =\ 13\ TeV$ with an integrated luminosity of $139fb^{-1}$ collected with the ATLAS detector in 2015-2018. The search is performed in events containing large missing transverse momentum and...
We present a phenomenological investigation of color-octet
scalars (sgluons) in supersymmetric models with Dirac gaugino masses that feature an explicitly broken $R$ symmetry ($R$-broken models). We have constructed such models by augmenting minimal $R$-symmetric models with a set of supersymmetric and softly supersymmetry-breaking operators that explicitly break $R$ symmetry. We have found...
The Higgs boson could provide the key to discover new physics at the Large Hadron Collider. We investigate novel decays of the Standard Model (SM) Higgs boson into leptophobic gauge bosons which can be light in agreement with all experimental constraints. We study the associated production of the SM Higgs and the leptophobic gauge boson that could be crucial to test the existence of a...
The $\eta$ and $\eta'$ mesons are almost unique in the particle universe since they are Goldstone boson and the dynamics of their decay are strongly constrained. The integrated eta meson samples collected in earlier experiments have been about ~$10^9$ events, dominated by the WASA at Cosy experiment, limiting considerably the search for such rare decays. A new experiment, REDTOP, is being...
The searches for permanent Electric Dipole Moments (EDMs) of elementary particles constitute one of the most powerful tools to probe physics beyond the Standard Model (SM). The existence of EDM can provide an explanation of the dominance of matter over antimatter in the universe which still is considered as one of the most puzzling questions in physics.
The JEDI Collaboration is...
We explore the implications of supersymmetric grand unified theories about the muon anomalous magnetic moment (muon g-2). The discrepancy between the Standard Model (SM) prediction and the experiments in muon g-2 can be resolved by the contributions from the supersymmetric particles, and the fundamental parameter space of the muon g-2 resolution typically favors light sleptons (<~ 800 GeV),...
We explore the implications of $g_\mu-2$ new result to five models based on the $SU(3)_C×SU(3)_L×U(1)_N$ gauge symmetry and put our conclusions into perspective with LHC bounds. We show that previous conclusions found in the context of such models change if there are more than one heavy particle running in the loop. Moreover, having in mind the projected precision aimed by the $g_\mu-2$...
Clockwork models can explain the flavor hierarchies in the Standard Model quark and lepton spectrum. We construct supersymmetric versions of such flavor clockwork models. The zero modes of the clockwork are identified with the fermions and sfermions of the Minimal Supersymmetric Standard Model. In addition to generating a hierarchical fermion spectrum, ...
In a particle theory model whose most readily discovered new particle is the $\sim 1$TeV bilepton resonance in same-sign leptons, currently being sought at CERN's LHC, there exist three quarks ${\cal D, S, T}$ which will be bound by QCD into baryons and mesons. We consider the decays of these additional baryons and mesons whose detailed experimental study will be beyond the reach of the 14...
The REDTOP experiment aims at collecting more than $10^{13}$ $\eta$/yr and $10^{11}$ $\eta'$/yr for studying rare meson decays.
Such large statistics provide the base for the investigation of several discrete symmetries, and the search for particles beyond the Standard Model.
The physics program and the ongoing sensitivity studies will be discussed during the presentation.
Though collider searches are constraining supersymmetric parameter space, generic model independent bounds on sneutrinos remain very low. We calculate new model independent lower bounds on general supersymmetric scenarios with sneutrino LSP and NLSPs. By recasting ATLAS LHC exotic searches in mono boson channels, we place an upper bound on the cross section on...
The Gamma Factory is a proposal to back-scatter laser photons off a beam of partially-stripped ions at the LHC, producing a beam of $\sim 10$ MeV to $1$ GeV photons with intensities of $10^{16}$ to $10^{18}~\text{s}^{-1}$. This implies $\sim 10^{23}$ to $10^{25}$ photons on target per year, many orders of magnitude greater than existing accelerator light sources and also far greater than all...
Recently, there has been great interest in beyond-the-Standard Model (BSM) physics involving new low-mass matter and mediator particles. One such model, $U(1)_{T3R}$, proposes a new U(1) gauge symmetry under which only right-handed fermions of the standard model are charged, as well as the addition of new vector-like fermions (e.g., $\chi_t$) and a new dark scalar particle ($\phi$) whose...
Scenarios in which right-handed light Standard Model fermions couple to a new gauge group, $U(1)_{T3R}$ can naturally generate a sub-GeV dark matter candidate. But such models necessarily have large couplings to the Standard Model, generally yielding tight experimental constraints. We show that the contributions to $g_\mu-2$ from the dark photon and dark Higgs largely cancel out in the narrow...
In this work we study the collider phenomenology of color-octet scalars (sgluons) in minimal supersymmetric models endowed with a global continuous R symmetry. We systematically catalog the significant decay channels of scalar and pseudoscalar sgluons and identify novel features that are natural in these models. These include decays in nonstandard diboson channels, such as to a gluon and a...
A search is presented for new physics beyond the standard model, including versions of Supersymmetry characterized by R-parity Violating (RPV) and Stealth SUSY. The result of this search is in events with two top quarks, no extra transverse momentum, and many light flavor jets as a final state of the top squark. The Run2 data used were collected with the CMS detector at the LHC in 2016 to...
Naturalness suggests that the masses of the lightest electroweak gauginos (electroweakinos) are near the electroweak scale and, as a result, are within the scope of current LHC searches. However, LHC searches have not yet provided evidence of any supersymmetric (SUSY) particles. While exclusion limits for SUSY particles have been commonly reported assuming a simplified model where the...
In a well-motivated class of beyond the Standard Model scenarios, dark matter interacts mainly with neutrinos of the SM via a neutrinophilic mediator. This scenario can leave a striking signature in neutrino detectors -- the mono-neutrino signature. In this process, invisible particles (either dark matter or the mediators) can be radiated off neutrinos when they undergo charged-current weak...
A non-Abelian $SU(2)_X$ gauge extension of the Standard Model is considered under which leptons carry non-trivial charge. Gauge anomaly cancellation requires additional vectorlike fermions, which along with neutral vector bosons that play the role of Dark Matter correct the muon and the electron anomalous magnetic moments as preferred by experiments. When Collider bounds, electroweak precision...
We present a search for dark matter candidates produced in association with a Higgs boson using data collected from $pp$ collision at $\sqrt{s}=13$ TeV with the ATLAS detector that corresponds to an integrated luminosity of 139 $fb^{-1}$. This search targets events that contain a large missing transverse momentum and a Higgs boson reconstructed either as two $b$-tagged small-radius jets or as...
Most searches for new physics at the Large Hadron Collider assume that a new particle produced in pp-collisions decays almost immediately or is non-interacting and escapes the detector. However, a variety of new physics models predict particles that decay inside the detector at a discernible distance from the interaction point. Such long-lived particles would create spectacular signatures that...
Many physics models beyond the Standard Model predict heavy new particles preferentially decaying to at least one top quark. Three searches for a heavy resonance decaying into at least one top quark in pp collision at a center-of-mass energy of 13 TeV at the LHC will be presented in the talk. These searches include: The search for a heavy resonance decaying to a top quark and a W boson in the...
A search for neutral long-lived particles decaying into displaced jets in the ATLAS hadronic calorimeter in $pp$ collisions at $\sqrt{s} = 13 \textrm{ TeV}$ during 2016 with data corresponding to $10.8 \textrm{ fb}^{-1}$ or $33.0 \textrm{ fb}^{-1}$ of integrated luminosity (depending on the trigger) is preserved in RECAST and thereafter used to constrain three new physics models not studied in...
Many beyond the Standard Model (BSM) theories suggest the existence of multiple fundamental scalar fields and associated Higgs bosons, with the standard model Higgs boson being the lightest and most easily discovered. The dimension-4 interactions between a theorized generic heavy Higgs boson and Standard Model (SM) particles have already been explored in all major Higgs boson production...
A search for dijet resonances in events with identified leptons has been performed using full Run 2 data collected in 𝑝𝑝 collisions at √s=13 TeV by the ATLAS detector, corresponding to an integrated luminosity of 139 𝑓𝑏−1. The dijet invariant-mass ($m_{jj}$) distribution from events with at least one isolated electron or muon was probed in the range of $0.22 < m_{jj} < 6.3$ TeV. The analysis...
Charged Higgs bosons produced either in top-quark decays or in association with a top-quark, subsequently decaying via $H^{\pm} \to \tau^{\pm}\nu_{\tau}$, are searched for in $36.1 \mathrm{fb^{-1}}$ of proton-proton collision data at $\sqrt{s}=13$ TeV recorded with the ATLAS detector. Depending on whether the associated top-quark decays hadronically or leptonically, the search targets...
Many theories beyond the Standard Model predict new phenomena, such as $Z'$ and vector-like quarks, in final states containing bottom- or top-quarks. It is challenging to reconstruct and identify the decay products and model the major backgrounds. Nevertheless, such final states offer great potential to reduce the Standard Model backgrounds due to their characteristic decay signature. The...
Triggering long-lived particles (LLPs) at the first stage of the trigger system is very crucial in LLP searches to ensure that we do not miss them at the very beginning. The future High Luminosity runs of the Large Hadron Collider will have an increased number of pile-up events per bunch crossing. There will be major upgrades in hardware, firmware and software sides, like tracking at level-1...
The search for long-lived particles (LLP) at the LHC can be improved with timing information. If the visible decay products of the LLP form jets, the arrival time is not well-defined. In this talk, I will discuss possible definitions and how they are affected by the kinematics of the underlying parton-level event.
Four top-quark production, a rare process in the Standard Model (SM) with a cross-section around 12 fb, is one of the heaviest final states produced at the LHC, and it is naturally sensitive to physics beyond the Standard Model (BSM). A data excess is observed with twice of the expectation. A follow-up analysis is the search for Heavy (pseudo)Higgs boson A/H produced in association with a...
This talk presents a search for a new resonance $W^\prime$ decaying into a $W$ boson and a $125~\text{GeV}$ Higgs boson $H$ in the ${\ell^{\pm}{\nu}b\bar{b}}$ final states, where $\ell = e,~\mu,~\mathrm{or}~\tau$, using $pp$ collision data at 13 TeV corresponding to an integrated luminosity of 139 fb$^{-1}$ collected by the ATLAS detector at LHC. The search considers the one-lepton channel,...
Weakly coupled light new physics is a well motivated lamppost often referred to as a dark sector. At low masses and weak couplings, dark sector particles are generically long-lived. In this talk I will describe how neutrino-portals to a dark sector can be efficiently probed by looking for the decay of heavy neutral leptons that are produced via the upscattering of solar neutrinos within the...
A search for a new heavy boson $W^{\prime}$ in proton-proton collisions at $\sqrt{s}$ = 13 TeV is presented. The search focuses on the decay of the $W^{\prime}$ to a top quark and a bottom quark, using the full Run 2 dataset collected with the ATLAS detector at the LHC with an integrated luminosity of 139 $\text{fb}^{−1}$. The talk will give an overview of the analysis, which includes the...
Many extensions of the Standard Model include the addition of charged Higgs bosons. The two-Higgs doublet model (2HDM) is one such extension that predicts the presence of charged Higgs bosons. The 2HDM predicts three neutral Higgs bosons along with a positive and negative charged pair of Higgs bosons. In this talk, we present a search for these charged Higgs bosons decaying into a top and...
Searches for physics beyond the Standard Model (SM) at collider experiments—mostly focused on prompt signatures with high momentum and high missing transverse energy—have thus far produced no definitive evidence for such phenomena. But what if they have been looking in the wrong places? Just as long-lived particles exist in the SM, beyond the SM physics may too feature such particles. Here, a...
A search is presented for a light pseudoscalar Higgs boson (a) using data collected by the CMS experiment at LHC, at the center-of-mass of energy of 13 TeV. The study looks into the decay Higgs boson (H) via the H→aa→μμττ channel. The Higgs boson can be both standard-model-like (125 GeV) or heavier. The pseudoscalar mass falls within the range ma ϵ[2mτ,mH/2]. The large mass difference between...
A search for electroweak production of charginos and neutralinos at the Large Hadron Collider was conducted in 139 fb$^{-1}$ of proton-proton collision data collected at a center of mass energy of $\sqrt{s} = 13$ TeV with the ATLAS detector. This search utilizes fully hadronic final states with missing transverse momentum to identify signal events with a pair of charginos or neutralinos that...
We present a search for a low mass dark photon below 1 MeV which is radiated from a muon in proton-proton collisions at a center-of-mass energy of 13 TeV. A low mass dark photon has no available decay channel to standard model particles, and is hence stable. We assume that a dark photon directly interacts with detector materials through bremsstrahlung, and its small kinetic mixing, in which...
The Standard Model of particle physics is in remarkable agreement with most experimental data so far. However, a lot of questions remain unanswered, such as the origin of neutrino masses or the need for extra sources of CP violation. Possible solutions rest on scalar sector extensions, popular beyond-the-Standard-Model scenarios, in which the addition of scalar triplets is an attractive...
A modest extension of the Standard Model by two additional Higgs doublets - the Higgs Troika Model - can provide a well-motivated scenario for successful baryogenesis if neutrinos are Dirac fermions. Adapting the ``Spontaneous Flavor Violation'' framework, we consider a version of the Troika model where light quarks have significant couplings to the new multi-TeV Higgs states. Resonant...
Originally, the Large Hadron Collider (LHC) was designed to complete the Standard Model (SM) of particle physics, and while great progress has been made in validating the SM, it still leaves unexplained phenomena. Because of this, it is useful to implement the search for Beyond the Standard Model (BSM) physics. The high luminosity upgrade to the LHC (HL-LHC) can improve current searches for...
The stringent constraints from the direct searches for exotic scalars at the LHC as well as indirect bounds from flavour physics measurements have imposed severe restrictions on the parameter space of new physics models featuring extended Higgs sectors. In the Type-II 2HDM, this implies a lower bound on the charged Higgs masses of $\mathcal{O}$(600 GeV). In this work we analyse the...
The Heavy Photon Search experiment searches for electro-produced dark photons using an electron beam provided by CEBAF at the Thomas Jefferson National Accelerator Facility. HPS looks for dark photons through two distinct methods – a resonance search in the e+e invariant mass distribution above the large QED background for large dark photon-SM particles couplings, and a displaced vertex search...
We revisit the solution to the $(g-2)_\mu$ puzzle based on a kinetically mixed dark photon. Despite this scenario being excluded in minimal models with fully visible and fully invisible dark photon decays, we show that semi-visible scenarios are still allowed by explicitly re-evaluating constraints from B-factories and fixed-target experiments. Such a solution points to dark photons with...
A search for a light pseudoscalar (a) in the composite Higgs model is performed in the gluon-gluon fusion production channel with decay to di-tau. The lightness of a makes it such that the most promising topology is that of a boosted di-tau topology, where a is created with significant momentum transverse to the LHC beam line before decaying into a pair of taus. Preliminary...
Axion-like particles (ALPs) provide a promising direction in the search for new physics, while a wide range of models incorporate ALPs. We point out that neutrino and dark matter experiments, such as DUNE, CCM, possess competitive sensitivity to ALP signals. High-intensity proton beams can not only produce copious amounts of neutrinos, but also cascade photons that are created from charged...
In this talk, we explore the collider phenomenology of the charged Higgs boson in the context of a Beyond Standard Model scenario with extended gauge and scalar sector. Because of the intricate pattern of symmetry breaking, the charged Higgs can simultaneously decay via heavy gauge boson mediated channels ($W^{'}Z/ WZ^{'}$) along with the traditional SM decay modes. Our goal here is to...
I discuss the scenario where the SM scalar sector is enhanced by two real scalar singlets. This model features 3 CP even neutral states that mix and allow for interesting decay chains, e.g. an asymmetric h3-> h1 h2 process with non-degenerate masses or h2-> h1 h1 processes with non SM-like masses. I will present several benchmark planes within this model which lead to interesting novel...
In this talk, I will propose the use of the Earth as a transducer for ultralight dark-matter detection. In particular I will point out a novel signal of kinetically mixed dark-photon dark matter: a monochromatic oscillating magnetic field generated at the surface of the Earth. Similar to the signal in a laboratory experiment in a shielded box (or cavity), this signal arises because the lower...
We consider an explicit effective field theory example based on the Bousso-Polchinski framework with a large number N of hidden sectors contributing to supersymmetry breaking. Each contribution comes from four form quantized fluxes, multiplied by random couplings. The soft terms in the observable sector in this case become random variables, with mean values and standard deviations which are...
Lepton number violation (LNV) is a very attractive research topic for theoretical and experimental physicists due to its implications beyond the Standard Model. It provides feasible theoretical explanations to several open questions in particle physics (e.g., the origin of neutrino mass) and also has a rich phenomenology at different energy scales. We explore the underlying connections between...
A 10 dimensional model with $\mathcal{N}=1$ SUSY and $E_8$ as a gauge group will be presented. It will be shown that through the orbifold $\mathbb{T}^6/(\mathbb{Z}_3\times \mathbb{Z}_3)$, only the Standard Model remains after compactification, with feasible Yukawa couplings. Gauge coupling unification can be achieved at $M_{GUT}=10^7\ {\rm 𝐺𝑒𝑉}$ with a viable proton lifetime. Therefore the...
In the Standard Model, we cannot obtain the mechanism how to derive the left-handed neutrino masses. Our strategy to solve it is to exploit the Seesaw Mechanism. To get the right-handed Majorana neutrino masses for the Seesaw Mechanism, we utilized and studied the D-brane instanton effect with magnetized orbifold models on torus. Many models can be constructed by changing the magnetic fluxes....
Although being very successful, the Standard Models (SM) of particle physics, fails to explain some observations and also puzzles. In particular, neutrino data can’t be accommodated within the SM. Also, the origin of observed hierarchies between charged fermion masses and CKM matrix elements remain unexplained within the SM.
We consider simple extension by non-anomalous U(1) flavor...
The R-parity violating decays of Wino charginos, Wino neutralinos and Bino Neutralinos LSPs are
analyzed within the context of the B − L MSSM “heterotic standard model”. These LSPs correspond
to statistically determined initial soft supersymmetry breaking parameters which, when evolved using
the renormalization group equations, lead to an effective theory satisfying all phenomenological...
We study a model which generates Majorana neutrino masses at tree-level via low-energy effective operator with mass-dimension-9. The introduction of such a higher dimensional operator brings down the lepton number violating mass scale to TeV making such model potentially testable at present or near future colliders. This model possesses several new $SU(2)_L$ fermionic multiplets, in...
The strongly coupled heterotic M-theory vacuum for both the observable and
hidden sectors of the B − L MSSM theory is reviewed, including a discussion of
the “bundle” constraints that both the observable sector SU(4) vector bundle
and the hidden sector bundle induced from a single line bundle must satisfy.
Gaugino condensation is then introduced within this context, and the hidden
sector...
Parity solutions to the strong CP problem are a compelling alternative to approaches based on Peccei-Quinn symmetry, particularly given the expected violation of global symmetries in a theory of quantum gravity. The most natural of these solutions break parity at a low scale, giving rise to a host of experimentally accessible signals. In this talk, we give an overview of this class of...
Despite of the successful predictions of the Standard model, some of the parameters from the flavor sector, e.g. the mixing angles and the and CP phases, do not have an origin within the model. It has been proposed to use modular flavor symmetries to solve this issue, either by imposing them or deriving them from an underlying theory. In this work, we derive the modular symmetries by using the...
We revisit a discussion of one possible way to search for lepton flavor violation (LFV), muonium-antimuonium oscillations. This process violates muon lepton number by two units and could be sensitive to the types of beyond the standard model physics that are not probed by other types of LFV processes. Using techniques of effective field theory, we calculate the mass and width differences of...
The general U$(1)_𝑋$ extension of the Standard Model (SM) is a well motivated scenario which has a plenty of new physics options. Such a model is anomaly free which requires to add three generations of the SM singlet right-handed neutrinos (RHNs) which naturally generates the light neutrino masses by the seesaw mechanism.This offers interesting phenomenological aspects in the model. In...
In certain extensions of the Standard Model(SM), the interactions between the new scalars and the SM Higgs can cause the electroweak(EW) symmetry to remain broken at temperatures well above the electroweak scale. Fermionic-induced EW symmetry non-restoration (EWSNR) effect has also been studied in the context of effective field theories, where EWSNR is linked to some non-renormalizable...
Lepton-flavor violating transitions provide excellent tools to probe physics beyond the Standard Model (BSM). Processes such as radiative muon decays or muon conversion on nuclei probe a variety of different operators. We point out that Rayleigh operators that contribute to muon conversion can also be probed in a much simple environment of e+e- collisions. We report on the computation of short...
We propose a model for the QCD axion which is realized through a coupling of the Peccei-Quinn scalar field to magnetically charged fermions at high energies. We show that the axion of this model solves the strong CP problem and then integrate out heavy magnetic monopoles using the Schwinger proper time method. We find that the model discussed yields axion couplings to the Standard Model which...
We show that assuming flavour violation in the first two generations
of sfermions in the decoupling limit leads to interesting consequences for proton decay. Assuming the decoupling sfermions lie within 30 TeV, for the decay mode $p \to e^+ \pi^0$, which has sensitivity beyond that of DUNE and Hyper K is brought within the reach of those experiments. The most of the decay modes which is $p...
The possibility that tiny violations of Lorentz invariance may occur in nature and be detectable with existing technology has been intensely pursued for over two decades. Despite there being no indication for Lorentz violation, many potential signatures, particularly in the QCD and electroweak sectors, remain critically unexamined. Recent theoretical work on Lorentz violation grounded in...
One of the current problems of the Standard Model is that it does not predict the parameters of the flavor sector, e.g. mixing angles and CP phases need to be adjusted by hand. Recently, a new approach to address this problem has been to assume that Yukawa couplings are modular forms which give rise to a modular flavor symmetry in the Lagrangian. The two main ways to proceed have been to...
Any measurably large elementary particle electric dipole moment (EDM) would constitute physics beyond the standard model. Based on frozen spin polarized beam control technology developed at the COSY laboratory in Juelich, Germany, a conceptual design is presented for a storage ring (PTR) capable of measuring proton (p) and deuteron (d) EDMs. Superimposed electric and magnetic bending make...
The talk presents a search for a new leptophilic vector boson Z' decaying into the four-muon final state using the data collected by ATLAS detector in the year 2015-2018. A moderate excess of 4𝜇 events with a 𝜇+𝜇− pair is the experimental signature for this study. The gauge boson Z' is predicted by the highly motivated gauged 𝐿𝜇−𝐿𝜏 model, which is the simplest extension of the Standard Model...
Rather than view time as one of four dimensions in space-time, we start with the assumption that time is best described in a three dimensional domain of its own, defined by spherical coordinates, and is “linked to” the spatial domain, defined by orthogonal Cartesian coordinates. The result is a six-dimensional structure that is simple to visualize and define geometrically. We will refer to...
Rare nuclear isotope accelerator facilities require high-intensity proton beams to produce different types of nuclear isotopes more copiously. Such requirements provide an excellent opportunity to search for dark-sector particles such as axion-like particles(ALPs). This presentation will introduce an experimental proposal called DAMSA (Dump-produced Aboriginal Matter Searches at Accelerator)...
With the discovery of the Higgs boson in 2012 by the CMS and ATLAS experiments, searches for new heavy particles (such as vector-like quarks) have ensued in hope of solving the hierarchy problem. In this talk, I will be discussing the search for the X5/3, a strongly interacting fermionic partner of the top quark with charge +5/3. Left-handed and right-handed coupling of the X5/3 to W bosons...
Everything in the Universe has its own structure; every structure is in harmony with the others; solar system, Milky Way, black holes, other systems of star around, etc. Also, electron which is one of the main subatomic particles is no exception. We could find electron in two different states: ground or exited state. Regardless of how it gets excited, we realize that it wants to return to the...
Rare nuclear isotope accelerator facilities provide high-flux proton beams to produce a large number of rare nuclear isotopes. The high-intensity nature of their beams enables investigating dark-sector particles including axion-like particles (ALPs). In this talk, we will discuss detection prospects of ALP, using its coupling to Standard Model photons, in DAMSA (Dump-produced Aboriginal Matter...
Clifford algebra is the math language of quantum mechanics, known to most physicists in the matrix representations of Pauli and Dirac. Less familiar (but far more intuitive) is the original geometric intent of Clifford, the algebra of interactions of fundamental geometric objects - point, line, plane, and volume elements. In geometric representation, the 3D vacuum wavefunction is comprised of...
The total decay width of the Higgs has not yet been constrained precisely, which allows for up to 11% of the branching fraction to be from beyond the standard model decays, so the Higgs Decay represents one possible way for Dark Matter(DM) searches. This talk will discuss the search for invisibly decaying Higgs boson or DM particles produced in association with a Z boson that decays into an...
The search for new physics at the energy frontier has a strong model-based foundation, with well-motivated theories informing the phase space that is subsequently investigated in data. This strategy has been effective for decades in establishing the Standard Model, culminating in the 2012 discovery of the Higgs boson with the Large Hadron Collider (LHC). Recent developments in machine learning...
All experimental data is consistent with massless neutrinos. There exist possibilities other than rest mass differences to explain oscillation. The two-component photon wavefunction is comprised of electric and magnetic flux quanta, coupled by Maxwell's equations. In the basic photon-electron interaction of QED, opposing phase shifts of the electron's inductive and capacitive impedances...
MicroBooNE is an 85-ton active mass liquid argon time projection chamber (LArTPC) at Fermilab. Its excellent calorimetry and resolution (both spatial and energy), along with its exposure to two neutrino beamlines make it a powerful detector not just for neutrino physics, but also for Beyond the Standard Model (BSM) physics and astroparticle physics. The experiment has competitive sensitivity...
Two-Higgs-Doublet model with an additional scalar (2HDM+a) belongs to a generic class of mediator-based dark matter models which have garnered considerable theoretical and experimental interest over the past few years.
This presentation talks about the the constraints on this model using 13 TeV collision data collected by the ATLAS detector at the LHC , with multiple analyses and combination...
Sophisticated machine learning techniques have promising potential in search for physics beyond Standard Model in Large Hadron Collider (LHC). Convolutional neural networks (CNN) can provide powerful tools for differentiating between patterns of calorimeter energy deposits by prompt particles of Standard Model and displaced particles coming from decay of long-lived particles predicted in...
An exercise using the value 2.5549x10^59, which is a value that is equal to the equations G/lp^2 and 2Pic^3/h, and that substitutes this value for the Gravitational Constant G in the derived Planck units was performed. The new values were then placed into a matrix chart that compares the newly derived values, dimensions, and magnitudes for both equations as they are used within each derived...
The ATLAS detector was designed to detect prompt particles from the LHC. A pair of long-lived particles, as part of a new Hidden Sector added to the Standard Model, would lead to challenging reconstruction and differentiating from background in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector. The two main backgrounds to a search for such long-lived particles are QCD multijet and...
The THDMa is a new physics model that extends the scalar sector of the Standard Model by an additional doublet as well as a pseudoscalar singlet and allows for mixing between all possible scalar states. In the gauge eigenbasis, the additional pseudoscalar serves as a portal to the dark sector, with a priori any dark matter spin states. The option where dark matter is fermionic is currently one...
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