Amarjit Soni
YOU?
Author Swipe
View article: Efficient lattice QCD computation of radiative-leptonic-decay form factors at multiple positive and negative photon virtualities
Efficient lattice QCD computation of radiative-leptonic-decay form factors at multiple positive and negative photon virtualities Open
In previous work [D. Giusti, Methods for high-precision determinations of radiative-leptonic decay form factors using lattice QCD, ], we showed that form factors for radiative leptonic decays of pseudoscalar mesons can be determined effici…
View article: Status of the Proton EDM Experiment (pEDM)
Status of the Proton EDM Experiment (pEDM) Open
The Proton EDM Experiment (pEDM) is the first direct search for the proton electric dipole moment (EDM) with the aim of being the first experiment to probe the Standard Model (SM) prediction of any particle EDM. Phase-I of pEDM will achiev…
View article: Old neutron stars as a new probe of relic neutrinos and sterile neutrino dark matter
Old neutron stars as a new probe of relic neutrinos and sterile neutrino dark matter Open
We study the kinetic cooling (heating) of old neutron stars due to coherent scattering with relic neutrinos (sterile neutrino dark matter) via Standard Model neutral-current interactions. We take into account several important physical eff…
View article: Old neutron stars as a new probe of relic neutrinos and sterile neutrino dark matter
Old neutron stars as a new probe of relic neutrinos and sterile neutrino dark matter Open
We study the kinetic cooling (heating) of old neutron stars due to coherent scattering with relic neutrinos (sterile neutrino dark matter) via Standard Model neutral-current interactions. We take into account several important physical eff…
View article: Theoretical underpinnings of CP-Violation at the High-energy Frontier
Theoretical underpinnings of CP-Violation at the High-energy Frontier Open
We present a general analysis for the discovery potential of CP-violation (CPV) searches in scattering processes at TeV-scale colliders in an effective field theory framework, using the SMEFT basis for higher dimensional operators. In part…
View article: Reappraisal of SU(3)-flavor breaking in $B\rightarrow DP$
Reappraisal of SU(3)-flavor breaking in $B\rightarrow DP$ Open
In light of recently found deviations of the experimental data from predictions from QCD factorization for $B_{(s)}\rightarrow D_{(s)}P$ decays, where $P=\{π,K\}$, we systematically probe the current status of the SU(3)$_F$ expansion from …
View article: Long-distance contribution to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>ε</mml:mi><mml:mi>K</mml:mi></mml:msub></mml:math> from lattice QCD
Long-distance contribution to from lattice QCD Open
A lattice QCD approach to the calculation of the long-distance contributions to εK is presented. This parameter describes indirect CP violation in K→ππ decay. While the short-distance contribution to εK can be accurately calculated in term…
View article: Theory of <i>CP</i> angle measurements
Theory of <i>CP</i> angle measurements Open
In the early 1980s Sanda-san and collaborators wrote key papers on the direct and clean determination of the unitarity angle ϕ1(β). This motivated many of us to analogously come up with ways for direct and clean determinations of the other…
View article: Rare K decays off and on the lattice
Rare K decays off and on the lattice Open
\nThe importance of rare $K$ decays especially in the context of a kaon unitarity triangle (KUT) is emphasized. The decay $K_L \\to \\pi^0 \\nu \\bar \\nu$ is theoretically very clean but experimentally extremely challenging. The Standard …
View article: Rare K decays off and on the lattice
Rare K decays off and on the lattice Open
The importance of rare $K$ decays especially in the context of a kaon unitarity triangle (KUT) is emphasized. The decay $K_L \to π^0 ν\bar ν$ is theoretically very clean but experimentally extremely challenging. The Standard Model predicti…
View article: Long-distance contribution to $ε_K$ from lattice QCD
Long-distance contribution to $ε_K$ from lattice QCD Open
A lattice QCD approach to the calculation of the long-distance contributions to $ε_K$ is presented. This parameter describes indirect CP violation in $K\toππ$ decay. While the short-distance contribution to $ε_K$ can be accurately calculat…
View article: Erratum: Isospin 0 and 2 two-pion scattering at physical pion mass using all-to-all propagators with periodic boundary conditions in lattice QCD [Phys. Rev. D <b>107</b>, 094512 (2023)]
Erratum: Isospin 0 and 2 two-pion scattering at physical pion mass using all-to-all propagators with periodic boundary conditions in lattice QCD [Phys. Rev. D <b>107</b>, 094512 (2023)] Open
Received 22 July 2023DOI:https://doi.org/10.1103/PhysRevD.108.039902Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain a…
View article: $ΔI = 3/2$ and $ΔI = 1/2$ channels of $K\toππ$ decay at the physical point with periodic boundary conditions
$ΔI = 3/2$ and $ΔI = 1/2$ channels of $K\toππ$ decay at the physical point with periodic boundary conditions Open
We present a lattice calculation of the $K\toππ$ matrix elements and amplitudes with both the $ΔI = 3/2$ and 1/2 channels and $\varepsilon'$, the measure of direct $CP$ violation. We use periodic boundary conditions (PBC), where the correc…
View article: Isospin 0 and 2 two-pion scattering at physical pion mass using all-to-all propagators with periodic boundary conditions in lattice QCD
Isospin 0 and 2 two-pion scattering at physical pion mass using all-to-all propagators with periodic boundary conditions in lattice QCD Open
A study of two-pion scattering for the isospin channels, I=0 and I=2, using lattice QCD is presented. Möbius domain-wall fermions, on top of the Iwasaki-DSDR gauge action for gluons with periodic boundary conditions, are used for the latti…
View article: Methods for high-precision determinations of radiative-leptonic decay form factors using lattice QCD
Methods for high-precision determinations of radiative-leptonic decay form factors using lattice QCD Open
We present a study of lattice-QCD methods to determine the relevant hadronic form factors for radiative-leptonic decays of pseudoscalar mesons. We provide numerical results for D+s→ℓ+νγ. Our calculation is performed using a domain-wall act…
View article: Exclusive semileptonic $B_s\to K \ell ν$ decays on the lattice
Exclusive semileptonic $B_s\to K \ell ν$ decays on the lattice Open
Semileptonic $B_s \to K \ell ν$ decays provide an alternative $b$-decay channel to determine the CKM matrix element $|V_{ub}|$, and to obtain a $R$-ratio to investigate lepton-flavor-universality violations. Results for the CKM matrix elem…
View article: Methods for high-precision determinations of radiative-leptonic decay form factors using lattice QCD
Methods for high-precision determinations of radiative-leptonic decay form factors using lattice QCD Open
We present a study of lattice-QCD methods to determine the relevant hadronic form factors for radiative leptonic decays of pseudoscalar mesons. We provide numerical results for $D_s^+ \to \ell^+ νγ$. Our calculation is performed using a do…
View article: Isospin 0 and 2 two-pion scattering at physical pion mass using all-to-all propagators with periodic boundary conditions in lattice QCD
Isospin 0 and 2 two-pion scattering at physical pion mass using all-to-all propagators with periodic boundary conditions in lattice QCD Open
A study of two-pion scattering for the isospin channels, $I=0$ and $I=2$, using lattice QCD is presented. Möbius domain wall fermions on top of the Iwasaki-DSDR gauge action for gluons with periodic boundary conditions are used for the lat…
View article: Generic tests of CP-violation in high-$p_\text{T}$ multi-lepton signals at the LHC and beyond
Generic tests of CP-violation in high-$p_\text{T}$ multi-lepton signals at the LHC and beyond Open
We introduce a modification to the standard expression for tree-level CP-violation in scattering processes at the LHC, which is important when the initial state in not self-conjugate. Based on that, we propose a generic and model-independe…
View article: Probing the muon (g-2) anomaly at the LHC in final states with two muons and two taus
Probing the muon (g-2) anomaly at the LHC in final states with two muons and two taus Open
The longstanding muon $(g-2)$ anomaly, as well as the persistent hints of lepton flavor universality violation in $B$-meson decays, could be signaling new physics beyond the Standard Model (SM). A minimal $R$-parity-violating supersymmetri…
View article: Precision tau physics: Challenge for Theory, on and off the lattice
Precision tau physics: Challenge for Theory, on and off the lattice Open
$τ$ is playing an important role in the current B-physics indications from experiments of lepton flavor universality violations(LFUV). This suggests it be given increasing attention theoretically in the coming years, given also the fact th…
View article: Relations between b → cτν decay modes in scalar models
Relations between b → cτν decay modes in scalar models Open
As a consequence of the Ward identity for hadronic matrix elements, we find relations between the differential decay rates of semileptonic decay modes with the underlying quark-level transition b → cτν, which are valid in scalar models. Th…
View article: Hints of natural supersymmetry in flavor anomalies?
Hints of natural supersymmetry in flavor anomalies? Open
The recent results from the Fermilab muon g-2 experiment, as well as the persisting hints of lepton flavor universality violation in B-meson decays, present a very strong case for flavor-nonuniversal new physics beyond the Standard Model. …
View article: Proton Decay Amplitudes with Physical Chirally-Symmetric Quarks
Proton Decay Amplitudes with Physical Chirally-Symmetric Quarks Open
Proton decay is a major prediction of Grand-Unified Theories (GUT) and its observation would indicate baryon number violation that is required for baryogenesis. Many decades of searching for proton decay have constrained its rate and ruled…
View article: Multi-lepton probes of new physics and lepton-universality in top-quark interactions
Multi-lepton probes of new physics and lepton-universality in top-quark interactions Open
We explore the sensitivity to new physics (NP) in the associated production of top-quarks with leptons $pp \to t \bar t \ell^+ \ell^-$, which leads to the multi-leptons signals $pp \to n \ell + {\tt jets} + \not\!\! E_T$, where $n = 2,3,4$…
View article: Form factors for semileptonic $B\to \pi\ , B_s\to K$ and $B_s\to D_s$ decays
Form factors for semileptonic $B\to \pi\ , B_s\to K$ and $B_s\to D_s$ decays Open
We report on our determinations of $B\\to \\pi\\ell\\nu$, $B_s\\to K \\ell \\nu$ and $B_s\\to D_s \\ell \\nu$ semileptonic form factors. In addition we discuss the determination of $R$-ratios testing lepton-flavor universality and suggest …