Emanuele Mereghetti
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View article: Can Pions and Weak Magnetism in 2νββ Tell Us Something About BSM Physics?
Can Pions and Weak Magnetism in 2νββ Tell Us Something About BSM Physics? Open
With experiments improving their 2𝜈𝛽𝛽 measurements, there is growing demand for precision in its theoretical calculation. A correction that has been applied to single 𝛽-decay and 0𝜈𝛽𝛽, but not yet to 2𝜈𝛽𝛽, is the chiral correction. This co…
View article: Quantum Monte Carlo calculation of $δ_{\rm NS}$ in $^{10}$C using an effective field theory approach
Quantum Monte Carlo calculation of $δ_{\rm NS}$ in $^{10}$C using an effective field theory approach Open
We compute radiative corrections to the superallowed $β$ decay of $^{10}{\rm C}$ in an effective field theory approach using nuclear matrix elements obtained from quantum Monte Carlo calculations. These corrections are an important ingredi…
View article: Global analysis of μ → e interactions in the SMEFT
Global analysis of μ → e interactions in the SMEFT Open
A bstract We study current experimental bounds on charged lepton flavor violating (CLFV) μ – e interactions in the model-independent framework of the Standard Model Effective Field Theory (SMEFT). Assuming a generic flavor structure in the…
View article: 2νββ spectrum in chiral effective field theory
2νββ spectrum in chiral effective field theory Open
A bstract We investigate two-neutrino double beta decay (2 νββ ) in chiral effective field theory. We find contributions from weak magnetism and double-weak pion-exchange at next-to-leading-order in the chiral power counting. We discuss th…
View article: Effective field theory for radiative corrections to charged-current processes. II. Axial-vector coupling
Effective field theory for radiative corrections to charged-current processes. II. Axial-vector coupling Open
Here, we discuss the hadronic structure-dependent radiative corrections to the axial-vector coupling that controls single-nucleon weak charged-current processes—commonly denoted by gA. We match the Standard Model at the GeV scale onto chir…
View article: Signs of Non-Monotonic Finite-Volume Corrections to $g_A$
Signs of Non-Monotonic Finite-Volume Corrections to $g_A$ Open
We study finite-volume (FV) corrections to determinations of $g_A$ via lattice quantum chromodynamics (QCD) using analytic results and numerical analysis. We observe that $SU(2)$ Heavy Baryon Chiral Perturbation Theory does not provide an …
View article: Gradient Flow of the Weinberg Operator
Gradient Flow of the Weinberg Operator Open
We present preliminary results on the susceptibilities involving the CP-violating (CPV) Weinberg three-gluon operator and the topological Θ term using the gradient flow scheme, and study their continuum and chiral extrapolations. These are…
View article: Gradient flow of the Weinberg operator
Gradient flow of the Weinberg operator Open
We present preliminary results on the susceptibilities involving the CP-violating (CPV) Weinberg three-gluon operator and the topological $Θ$ term using the gradient flow scheme, and study their continuum and chiral extrapolations. These a…
View article: $2νββ$ Spectrum in Chiral Effective Field Theory
$2νββ$ Spectrum in Chiral Effective Field Theory Open
We investigate two-neutrino double beta decay ($2νββ$) in chiral effective field theory. We find contributions from weak magnetism and double-weak pion-exchange at next-to-leading-order in the chiral power counting. We discuss the impact o…
View article: Sterile neutrinos and neutrinoless double beta decay in effective field theory
Sterile neutrinos and neutrinoless double beta decay in effective field theory Open
We investigate neutrinoless double beta decay (0νββ) in the presence of sterile neutrinos with Majorana mass terms. These gauge-singlet fields are allowed to interact with Standard-Model (SM) fields via renormalizable Yukawa couplings as w…
View article: Charged lepton flavor violation at the EIC
Charged lepton flavor violation at the EIC Open
We present a comprehensive analysis of the potential sensitivity of the Electron-Ion Collider (EIC) to charged lepton flavor violation (CLFV) in the channel ep → τX, within the model-independent framework of the Standard Model Effective Fi…
View article: Global analysis of $μ\to e$ interactions in the SMEFT
Global analysis of $μ\to e$ interactions in the SMEFT Open
We study current experimental bounds on charged lepton flavor violating (CLFV) $μ$-$e$ interactions in the model-independent framework of the Standard Model Effective Field Theory (SMEFT). Assuming a generic flavor structure in the quark s…
View article: Radiative Corrections to Superallowed <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math> Decays in Effective Field Theory
Radiative Corrections to Superallowed Decays in Effective Field Theory Open
The accuracy of Vud determinations from superallowed β decays critically hinges on control over radiative corrections. Recently, substantial progress has been made on the single-nucleon, universal corrections, while nucleus-dependent effec…
View article: Neutrinoless double beta decay rates in the presence of light sterile neutrinos
Neutrinoless double beta decay rates in the presence of light sterile neutrinos Open
A bstract We investigate neutrinoless double-beta decay (0 νββ ) in minimal extensions of the Standard Model of particle physics where gauge-singlet right-handed neutrinos give rise to Dirac and Majorana neutrino mass terms. We argue that …
View article: Electric dipole moments in 5+3 flavor weak effective theory
Electric dipole moments in 5+3 flavor weak effective theory Open
A bstract A fully generic treatment of electric dipole moments (EDMs) is presented in the CP-violating and flavor-conserving weak effective field theory (WET) with five flavors of quarks and three flavors of leptons. We systematically anal…
View article: Radiative corrections to proton-proton fusion in pionless EFT
Radiative corrections to proton-proton fusion in pionless EFT Open
We study the leading radiative correction to proton-proton fusion using the pionless effective field theory framework at leading order. We derive the relevant matrix elements and evaluate them using the method of regions. We benchmark the …
View article: Ab-initio electroweak corrections to superallowed $β$ decays and their impact on $V_{ud}$
Ab-initio electroweak corrections to superallowed $β$ decays and their impact on $V_{ud}$ Open
Radiative corrections are essential for an accurate determination of $V_{ud}$ from superallowed $β$ decays. In view of recent progress in the single-nucleon sector, the uncertainty is dominated by the theoretical description of nucleus-dep…
View article: Radiative corrections to superallowed $β$ decays in effective field theory
Radiative corrections to superallowed $β$ decays in effective field theory Open
The accuracy of $V_{ud}$ determinations from superallowed $β$ decays critically hinges on control over radiative corrections. Recently, substantial progress has been made on the single-nucleon, universal corrections, while nucleus-dependen…
View article: Sterile neutrino dark matter within the $ν$SMEFT
Sterile neutrino dark matter within the $ν$SMEFT Open
Sterile neutrinos with masses at the $\mathrm{keV}$ scale and mixing to the active neutrinos offer an elegant explanation of the observed dark matter (DM) density. However, the very same mixing inevitably leads to radiative photon emission…
View article: Neutron electric dipole moment from isovector quark chromo-electric dipole moment
Neutron electric dipole moment from isovector quark chromo-electric dipole moment Open
We present results from our lattice QCD study of the contribution of the isovector quark cEDM (qcEDM) operator to the neutron EDM. The calculation was carried out on four 2+1+1-flavor highly improved staggered quark ensembles (provided to …
View article: Axionlike-particle contributions to the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>μ</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>e</mml:mi></mml:mrow></mml:math> conversion
Axionlike-particle contributions to the conversion Open
We study the μ→e conversion process in nuclear targets arising in models of axionlike particles (ALPs) with hadronic and charged lepton flavor violating (CLFV) interactions. Contributions to this process generally fall into two categories:…
View article: Electric Dipole Moments in 5+3 Flavor Weak Effective Theory
Electric Dipole Moments in 5+3 Flavor Weak Effective Theory Open
A fully generic treatment of electric dipole moments (EDMs) is presented in the CP-violating and flavor-conserving weak effective field theory (WET) with five flavors of quarks and three flavors of leptons. We systematically analyze leadin…
View article: Anomalies in global SMEFT analyses. A case study of first-row CKM unitarity
Anomalies in global SMEFT analyses. A case study of first-row CKM unitarity Open
A bstract Recent developments in the Standard Model analysis of semileptonic charged-current processes involving light quarks have revealed ~ 3 σ tensions in Cabibbo universality tests involving meson, neutron, and nuclear beta decays. In …
View article: Neutrinoless double beta decay rates in the presence of light sterile neutrinos
Neutrinoless double beta decay rates in the presence of light sterile neutrinos Open
We investigate neutrinoless double-beta decay ($0νββ$) in minimal extensions of the Standard Model of particle physics where gauge-singlet right-handed neutrinos give rise to Dirac and Majorana neutrino mass terms. We argue that the standa…