E. Epelbaum
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View article: Gravitational form factors of the Higgs boson
Gravitational form factors of the Higgs boson Open
We calculate the one-loop electroweak corrections to the gravitational form factors of the Higgs boson and discuss the interpretation of the obtained results.
View article: Vacuum energy in effective field theory of general relativity
Vacuum energy in effective field theory of general relativity Open
It is shown to all orders of perturbation theory that in the effective field theory of general relativity the condition of vanishing of the vacuum energy leads to the same value of the cosmological constant viewed as a parameter of the eff…
View article: Renormalizability and nonrenormalizability of nonlocal potentials
Renormalizability and nonrenormalizability of nonlocal potentials Open
We consider separable toy models of the nucleon-nucleon interaction inspired by chiral effective field theory. We show that nonlocality of the long-range forces causes the need for nonlocal counter terms, or even makes the whole approach n…
View article: Zemach radii and nuclear structure effects in hyperfine splitting of Lithium
Zemach radii and nuclear structure effects in hyperfine splitting of Lithium Open
Nuclear structure effects are essential for describing hyperfine splittings from high-precision atomic spectroscopy measurements. These effects are often parametrized by the effective or elastic Zemach radii, with their difference poorly u…
View article: Chiral $3π$-exchange potential using the method of unitary transformation
Chiral $3π$-exchange potential using the method of unitary transformation Open
Nuclear potentials are known to exhibit a considerable degree of scheme dependence. For one- and two-pion exchange nucleon-nucleon (NN) potentials, unitary ambiguities start showing up at the level of the leading relativistic corrections t…
View article: Gravitational Form Factors of the Deuteron
Gravitational Form Factors of the Deuteron Open
The gravitational form factors of the deuteron are calculated in the framework of non-relativistic chiral effective field theory. Non-relativistic reduction of the matrix element of the energy-momentum tensor operator for spin-one systems …
View article: Can the strong interactions between hadrons be determined using femtoscopy?
Can the strong interactions between hadrons be determined using femtoscopy? Open
In the last decades, femtoscopic measurements from heavy-ion collisions have become a popular tool to investigate the strong interactions between hadrons. The key observables measured in such experiments are the two-hadron momentum correla…
View article: Chiral symmetry and peripheral neutron-$α$ scattering
Chiral symmetry and peripheral neutron-$α$ scattering Open
We propose and demonstrate that peripheral neutron-$α$ scattering at low energies can serve as a sensitive and clean probe of the long-range three-nucleon forces. To this aim, we perform {\it ab initio} quantum Monte Carlo calculations usi…
View article: Three-body forces and Efimov physics in nuclei and atoms
Three-body forces and Efimov physics in nuclei and atoms Open
This review article presents historical developments and recent advances in our understanding on the three-body forces and Efimov physics, from an interdisciplinary viewpoint encompassing nuclear physics and cold atoms. Theoretical attempt…
View article: Internal structure of the T(3875)+ from its light-quark mass dependence
Internal structure of the T(3875)+ from its light-quark mass dependence Open
We employ a chiral effective field theory-based approach to connect DD⁎ scattering observables at the physical and variable pion masses accessible in lattice QCD simulations. We incorporate all relevant scales associated with three-body DD…
View article: On the definition of the nucleon axial charge density
On the definition of the nucleon axial charge density Open
We work out the spatial density distributions corresponding to the axial-vector charge density operator for spin-1/2 systems using states described by sharply localized wave packets in arbitrary Lorentz-frames. The static approximation, le…
View article: Non-perturbative three-nucleon simulation using chiral lattice EFT
Non-perturbative three-nucleon simulation using chiral lattice EFT Open
We study the three-nucleon system at next-to-next-to-next-to-leading order ($\mathrm{N^3LO}$) in the framework of chiral effective field theory (EFT) on the lattice. Our calculations do not rely on a perturbative treatment of subleading co…
View article: Gravitational form factors of the deuteron
Gravitational form factors of the deuteron Open
The gravitational form factors of the deuteron are calculated in the framework of non-relativistic chiral effective field theory. Non-relativistic reduction of the matrix element of the energy-momentum tensor operator for spin-one systems …
View article: Doubly charm tetraquark channel with isospin $1$ from lattice QCD
Doubly charm tetraquark channel with isospin $1$ from lattice QCD Open
Experimentally, the doubly charm tetraquark channel $cc\bar q\bar q$ with $q\!=\!u,d$ features an exotic hadron, $T_{cc}$, with isospin $I\!=\!0$ near the $DD^*$ threshold, while no peak was observed for $I\!=\!1$. We present a lattice QCD…
View article: Parity and time-reversal violating nuclear forces with explicit $$\Delta $$-excitations
Parity and time-reversal violating nuclear forces with explicit $$\Delta $$-excitations Open
We emphasize the usefulness of treating delta resonances as explicit degrees of freedom in applications of chiral effective field theory (EFT) to parity-violating and time-reversal-violating (PVTV) nuclear interactions. Compared with the d…
View article: Vacuum energy in the effective field theory of general relativity with a scalar field
Vacuum energy in the effective field theory of general relativity with a scalar field Open
A consistency condition of general relativity as an effective field theory in Minkowskian background uniquely fixes the value of the cosmological constant. In two-loop calculations, including the interaction of gravitons with matter fields…
View article: Internal structure of the $T_{cc}(3875)^+$ from its light-quark mass dependence
Internal structure of the $T_{cc}(3875)^+$ from its light-quark mass dependence Open
We employ a chiral effective field theory-based approach to connect $DD^*$ scattering observables at the physical and variable pion masses accessible in lattice QCD simulations. We incorporate all relevant scales associated with three-body…
View article: Parity and time-reversal violating nuclear forces with explicit $Δ$-excitations
Parity and time-reversal violating nuclear forces with explicit $Δ$-excitations Open
We emphasize the usefulness of treating delta resonances as explicit degrees of freedom in applications of chiral effective field theory (EFT) to parity-violating and time-reversal-violating (PVTV) nuclear interactions. Compared with the d…
View article: Three-body forces and Efimov physics in nuclei and atoms
Three-body forces and Efimov physics in nuclei and atoms Open
This review article presents historical developments and recent advances in our understanding on the three-body forces and Efimov physics, from an interdisciplinary viewpoint encompassing nuclear physics and cold atoms. Theoretical attempt…
View article: Vacuum energy in the effective field theory of general relativity with a scalar field
Vacuum energy in the effective field theory of general relativity with a scalar field Open
A consistency condition of general relativity as an effective field theory in Minkowskian background uniquely fixes the value of the cosmological constant. In two-loop calculations, including the interaction of gravitons with matter fields…
View article: Solving the left-hand cut problem in lattice QCD: <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>T</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mi>c</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>3875</mml:mn><mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mo>+</mml:mo></mml:msup></mml:math> from finite volume energy levels
Solving the left-hand cut problem in lattice QCD: from finite volume energy levels Open
We discuss a novel effective-field-theory-based approach for extracting two-body scattering information from finite volume energies, serving as an alternative to Lüscher’s method. By explicitly incorporating one-pion exchange, we overcome …
View article: Examples and Counterexamples of Renormalizability of an EFT in the Nonperturbative Regime
Examples and Counterexamples of Renormalizability of an EFT in the Nonperturbative Regime Open
An important feature of an effective field theory is its renormalizability, which implies that one can apply a certain power counting to renormalized quantities and perform a systematic expansion of the calculated observables in terms of s…
View article: Chiral Symmetry and Nuclear Interactions
Chiral Symmetry and Nuclear Interactions Open
About 3 decades ago, Steven Weinberg came up with an idea of using the effective chiral Lagrangian to describe nuclear interactions, which has had a long-lasting impact on nuclear physics. Here, I will reflect on what has been learned sinc…
View article: Gravitational p → ∆+ transition form factors in chiral perturbation theory
Gravitational p → ∆+ transition form factors in chiral perturbation theory Open
A bstract The gravitational form factors of the transition from the proton to the ∆ + resonance are calculated to leading one-loop order using a manifestly Lorentz-invariant formulation of chiral perturbation theory. We take into account t…
View article: Explicit renormalization of the nucleon-nucleon interaction in chiral EFT and non-perturbative effects
Explicit renormalization of the nucleon-nucleon interaction in chiral EFT and non-perturbative effects Open
Nucleon-nucleon interaction is studied within chiral effective field theory with a finite cutoff at next-to-leading order in the chiral expansion.\nThe leading order interaction is resummed non-perturbatively, whereas the next-to-leading-o…
View article: Two-loop calculation of the nucleon self-energy
Two-loop calculation of the nucleon self-energy Open
The nucleon self-energy is calculated in SU(2) covariant chiral perturbation theory to study the pion mass dependence of the nucleon mass up to chiral order $\mathcal{O}(q^6)$, i.e., including two-loop diagrams. Applying an algorithm propo…