Arseniy A. Filin
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The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
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Arseniy A. Filin has a total of 56 co-authors. Here are the top co-authors by number of shared publications:
- Vadim Baru
Ruhr-Universität Bochum
42 shared publications - Evgeny Epelbaum
Ruhr-Universität Bochum
32 shared publications - Christoph Hanhart
Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425 Jülich, Germany
25 shared publications - Alexey V. Nefediev
Universität Bonn
19 shared publications - Ulf-Gerrit Meißner
Universität Bonn
7 shared publications - Hermann Krebs
Fakultät für Physik und Astronomie Institut für Theoretische Physik II Ruhr-Universität Bochum D-44780 Bochum Germany
6 shared publications
Latest Publications
- Open Access
- 22 June 2026
- Published by American Physical Society (APS) in Physical Review D
- Vol. 113 (11)
Shallow T b c states from an EFT analysis of B ( * ) D ¯ ( * ) scattering on the lattice
We present an effective field theory (EFT) framework for coupled-channel B ( * ) D ¯ ( * ) scattering, applying it to recent lattice QCD results by Alexandrou []. Two complementary EFT approaches are developed: (1) a low-energy theory near the B D ¯ ( J = 0 ) and B * D ¯ ( J = 1 ) thresholds, where coupled-channel effects are integrated out; (2) coupled-channel formulation, where all relevant momentum scales are treated as soft, incorporating contact interactions and one-pion exchange (OPE). Importantly, OPE contributes to the lowest channels only through off-diagonal transitions, thus resulting in the appearance of the left-hand cut from two-pion exchange. The two approaches yield mutually consistent results, supporting the existence of shallow bound states in both channels, in agreement with the lattice findings. The finite-volume spectra and extracted pole positions show a near-degeneracy in J = 0 and J = 1 channels, consistent with heavy-quark spin symmetry (HQSS). Using HQSS, we predict additional shallow bound states near the B D ¯ * and B * D ¯ * thresholds, which are accessible to future lattice simulations. The effect of OPE on the finite volume spectra is found to be small, with only moderate impact on HQSS partners.
- 22 June 2026
- Published by American Physical Society (APS) in Physical Review D
- Vol. 113 (11)
Open AccessShallow T b c states from an EFT analysis of B ( * ) D ¯ ( * ) scattering on the lattice
We present an effective field theory (EFT) framework for coupled-channel B ( * ) D ¯ ( * ) scattering, applying it to recent lattice QCD results by Alexandrou []. Two complementary EFT approaches are developed: (1) a low-energy theory near the B D ¯ ( J = 0 ) and B * D ¯ ( J = 1 ) thresholds, where coupled-channel effects are integrated out; (2) coupled-channel formulation, where all relevant momentum scales are treated as soft, incorporating contact interactions and one-pion exchange (OPE). Importantly, OPE contributes to the lowest channels only through off-diagonal transitions, thus resulting in the appearance of the left-hand cut from two-pion exchange. The two approaches yield mutually consistent results, supporting the existence of shallow bound states in both channels, in agreement with the lattice findings. The finite-volume spectra and extracted pole positions show a near-degeneracy in J = 0 and J = 1 channels, consistent with heavy-quark spin symmetry (HQSS). Using HQSS, we predict additional shallow bound states near the B D ¯ * and B * D ¯ * thresholds, which are accessible to future lattice simulations. The effect of OPE on the finite volume spectra is found to be small, with only moderate impact on HQSS partners.
- Open AccessShallow $T_{bc}$ states from an EFT analysis of $B^{(*)} \bar D^{(*)}$ scattering on the latticeWe present an effective field theory (EFT) framework for coupled-channel $B^{(*)}\bar D^{(*)}$ scattering, applying it to recent lattice QCD results by Alexandrou et al. [Phys. Rev. Lett. 132, 151902 (2024)]. Two complementary EFT approaches are developed: (1) A low-energy theory near the $B \bar D$ ($J=0$) and $B^* \bar D$ ($J=1$) thresholds, where coupled-channel effects are integrated out; (2) A coupled-channel formulation, where all relevant momentum scales are treated as soft, incorporating contact interactions and one-pion exchange (OPE). Importantly, OPE contributes to the lowest channels only through off-diagonal transitions, thus resulting in the appearance of the left-hand cut from two-pion exchange. The two approaches yield mutually consistent results, supporting the existence of shallow bound states in both channels, in agreement with the lattice findings. The finite-volume spectra and extracted pole positions show a near-degeneracy in $J=0$ and $J=1$ channels, consistent with heavy-quark spin symmetry (HQSS). Using HQSS, we predict additional shallow bound states near the $B \bar{D}^*$ and $B^* \bar{D}^*$ thresholds, which are accessible to future lattice simulations. The effect of OPE on the finite volume spectra is found to be small, with only moderate impact on HQSS partners.Open AccessShallow $T_{bc}$ states from an EFT analysis of $B^{(*)} \bar D^{(*)}$ scattering on the latticeWe present an effective field theory (EFT) framework for coupled-channel $B^{(*)}\bar D^{(*)}$ scattering, applying it to recent lattice QCD results by Alexandrou et al. [Phys. Rev. Lett. 132, 151902 (2024)]. Two complementary EFT approaches are developed: (1) A low-energy theory near the $B \bar D$ ($J=0$) and $B^* \bar D$ ($J=1$) thresholds, where coupled-channel effects are integrated out; (2) A coupled-channel formulation, where all relevant momentum scales are treated as soft, incorporating contact interactions and one-pion exchange (OPE). Importantly, OPE contributes to the lowest channels only through off-diagonal transitions, thus resulting in the appearance of the left-hand cut from two-pion exchange. The two approaches yield mutually consistent results, supporting the existence of shallow bound states in both channels, in agreement with the lattice findings. The finite-volume spectra and extracted pole positions show a near-degeneracy in $J=0$ and $J=1$ channels, consistent with heavy-quark spin symmetry (HQSS). Using HQSS, we predict additional shallow bound states near the $B \bar{D}^*$ and $B^* \bar{D}^*$ thresholds, which are accessible to future lattice simulations. The effect of OPE on the finite volume spectra is found to be small, with only moderate impact on HQSS partners.
- Open Access
Ab initio charge form factors and radii of light isoscalar nuclei: Role of the two-body charge density
We make \textit{ab initio} predictions of charge form factors (FFs) and radii for the isoscalar nuclei $^6$Li and $^8$Be using the Jacobi-coordinate No-Core Shell Model. The calculations employ chiral semilocal momentum-space regularized two- and three-nucleon interactions, together with consistently regularized one- and two-nucleon electromagnetic charge operators. With the short-range charge density fixed to the $^4$He charge radius, the predicted FFs and the $^6$Li radius show good agreement with available experimental data. We find that two-nucleon charge density contributions are essential for describing the FFs, particularly at intermediate and large momentum transfers. Although their influence on the charge radii is limited, these contributions remain crucial for attaining accurate predictions. The present results highlight the importance of two-nucleon charge operators in addressing the long-standing underestimation of nuclear charge radii in \textit{ab initio} calculations based on modern chiral interactions.
Open AccessAb initio charge form factors and radii of light isoscalar nuclei: Role of the two-body charge density
We make \textit{ab initio} predictions of charge form factors (FFs) and radii for the isoscalar nuclei $^6$Li and $^8$Be using the Jacobi-coordinate No-Core Shell Model. The calculations employ chiral semilocal momentum-space regularized two- and three-nucleon interactions, together with consistently regularized one- and two-nucleon electromagnetic charge operators. With the short-range charge density fixed to the $^4$He charge radius, the predicted FFs and the $^6$Li radius show good agreement with available experimental data. We find that two-nucleon charge density contributions are essential for describing the FFs, particularly at intermediate and large momentum transfers. Although their influence on the charge radii is limited, these contributions remain crucial for attaining accurate predictions. The present results highlight the importance of two-nucleon charge operators in addressing the long-standing underestimation of nuclear charge radii in \textit{ab initio} calculations based on modern chiral interactions.
- Open Access
- 11 December 2024
- Published by Elsevier in Physics Letters B
- Vol. 860
Internal structure of the Tcc(3875)+ from its light-quark mass dependence
- 11 December 2024
- Published by Elsevier in Physics Letters B
- Vol. 860
Open AccessInternal structure of the Tcc(3875)+ from its light-quark mass dependence
- Top Cited PapersOpen Access
- 30 April 2024
- Published by American Physical Society (APS) in Physical Review D
- Vol. 109 (7) , L071506
Solving the left-hand cut problem in lattice QCD: from finite volume energy levelsWe 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 the challenging left-hand cut problem in Lüscher’s method and can handle finite volume energy levels both below and above the left-hand cut. Applied to the lattice data for scattering at a pion mass of 280 MeV, as an illustrative example, our results reveal the significant impact of the one-pion exchange on -wave and -wave phase shifts. The pole position of the state, extracted from the finite-volume energy levels at this pion mass while taking into account left-hand cut effects, range corrections and partial-wave mixing, is consistent with a near-threshold resonance. This study demonstrates, for the first time, that two-body scattering information can be reliably extracted from lattice spectra including the left-hand cut.- 30 April 2024
- Published by American Physical Society (APS) in Physical Review D
- Vol. 109 (7) , L071506
Top Cited PapersOpen AccessSolving the left-hand cut problem in lattice QCD: from finite volume energy levelsWe 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 the challenging left-hand cut problem in Lüscher’s method and can handle finite volume energy levels both below and above the left-hand cut. Applied to the lattice data for scattering at a pion mass of 280 MeV, as an illustrative example, our results reveal the significant impact of the one-pion exchange on -wave and -wave phase shifts. The pole position of the state, extracted from the finite-volume energy levels at this pion mass while taking into account left-hand cut effects, range corrections and partial-wave mixing, is consistent with a near-threshold resonance. This study demonstrates, for the first time, that two-body scattering information can be reliably extracted from lattice spectra including the left-hand cut. - Open AccessSolving the left-hand cut problem in lattice QCD: $T_{cc}(3875)^+$ from finite volume energy levelsWe 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 the challenging left-hand cut problem in Lüscher's method and can handle finite volume energy levels both below and above the left-hand cut. Applied to the lattice data for $DD^*$ scattering at a pion mass of 280 MeV, as an illustrative example, our results reveal the significant impact of the one-pion exchange on P-wave and S-wave phase shifts. The pole position of the $T_{cc}(3875)^+$ state, extracted from the finite-volume energy levels at this pion mass while taking into account left-hand cut effects, range corrections and partial-wave mixing, is consistent with a near-threshold resonance. This study demonstrates, for the first time, that two-body scattering information can be reliably extracted from lattice spectra including the left-hand cut.Open AccessSolving the left-hand cut problem in lattice QCD: $T_{cc}(3875)^+$ from finite volume energy levelsWe 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 the challenging left-hand cut problem in Lüscher's method and can handle finite volume energy levels both below and above the left-hand cut. Applied to the lattice data for $DD^*$ scattering at a pion mass of 280 MeV, as an illustrative example, our results reveal the significant impact of the one-pion exchange on P-wave and S-wave phase shifts. The pole position of the $T_{cc}(3875)^+$ state, extracted from the finite-volume energy levels at this pion mass while taking into account left-hand cut effects, range corrections and partial-wave mixing, is consistent with a near-threshold resonance. This study demonstrates, for the first time, that two-body scattering information can be reliably extracted from lattice spectra including the left-hand cut.
- Top Cited PapersOpen Access
- 29 September 2023
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 131 (13) , 131903
Role of Left-Hand Cut Contributions on Pole Extractions from Lattice Data: Case Study forWe discuss recent lattice data for the state to stress, for the first time, a potentially strong impact of left-hand cuts from the one-pion exchange on the pole extraction for near-threshold exotic states. In particular, if the left-hand cut is located close to the two-particle threshold, which happens naturally in the system for the pion mass exceeding its physical value, the effective-range expansion is valid only in a very limited energy range up to the cut and as such is of little use to reliably extract the poles. Then, an accurate extraction of the pole locations requires the one-pion exchange to be implemented explicitly into the scattering amplitudes. Our findings are general and potentially relevant for a wide class of hadronic near-threshold states.- 29 September 2023
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 131 (13) , 131903
Top Cited PapersOpen AccessRole of Left-Hand Cut Contributions on Pole Extractions from Lattice Data: Case Study forWe discuss recent lattice data for the state to stress, for the first time, a potentially strong impact of left-hand cuts from the one-pion exchange on the pole extraction for near-threshold exotic states. In particular, if the left-hand cut is located close to the two-particle threshold, which happens naturally in the system for the pion mass exceeding its physical value, the effective-range expansion is valid only in a very limited energy range up to the cut and as such is of little use to reliably extract the poles. Then, an accurate extraction of the pole locations requires the one-pion exchange to be implemented explicitly into the scattering amplitudes. Our findings are general and potentially relevant for a wide class of hadronic near-threshold states. - Open AccessRole of left-hand cut contributions on pole extractions from lattice data: Case study for $T_{cc}(3875)^+$We discuss recent lattice data for the $T_{cc}(3875)^+$ state to stress, for the first time, a potentially strong impact of left-hand cuts from the one-pion exchange on the pole extraction for near-threshold exotic states. In particular, if the left-hand cut is located close to the two-particle threshold, which happens naturally in the $DD^*$ system for the pion mass exceeding its physical value, the effective-range expansion is valid only in a very limited energy range up to the cut and as such is of little use to reliably extract the poles. Then, an accurate extraction of the pole locations requires the one-pion exchange to be implemented explicitly into the scattering amplitudes. Our findings are general and potentially relevant for a wide class of hadronic near-threshold states.Open AccessRole of left-hand cut contributions on pole extractions from lattice data: Case study for $T_{cc}(3875)^+$We discuss recent lattice data for the $T_{cc}(3875)^+$ state to stress, for the first time, a potentially strong impact of left-hand cuts from the one-pion exchange on the pole extraction for near-threshold exotic states. In particular, if the left-hand cut is located close to the two-particle threshold, which happens naturally in the $DD^*$ system for the pion mass exceeding its physical value, the effective-range expansion is valid only in a very limited energy range up to the cut and as such is of little use to reliably extract the poles. Then, an accurate extraction of the pole locations requires the one-pion exchange to be implemented explicitly into the scattering amplitudes. Our findings are general and potentially relevant for a wide class of hadronic near-threshold states.
- Open Access
- 30 January 2023
- Published by American Physical Society (APS) in Physical Review D
- Vol. 107 (1) , 014027
Emergence of heavy quark spin symmetry breaking in heavy quarkonium decays
Heavy-quark spin symmetry (HQSS) implies that in the direct decay of a heavy quarkonium with spin , only lower lying heavy quarkonia with the same spin can be produced. However, this selection rule, expected to work very well in the -quark sector, can be overcome if multiquark intermediate states are involved in the decay chain, allowing for transitions to the final-state heavy quarkonia with a different spin . In particular, the measured decays (, 2, 3) and (, 2) appear to have nearly equal strengths, which is conventionally explained by a simultaneous presence of both and components in the wave functions of the in equal shares. Meanwhile, the destructive interference between the contributions of the and to the decay amplitude for a final state kills the signal to zero in the strict HQSS limit. In this paper, we discuss how the HQSS violation needs to be balanced by the narrowness of the states in the physical case to allow for equal transition strengths into final states with different total heavy quark spins, and how spin symmetry is restored as a result of a subtle interplay of the scales involved, when the mass of a heavy quark becomes infinite. Moreover, we demonstrate how similar branching fractions of the decays into and can be obtained and how the mentioned HQSS breaking can be reconciled with the dispersive approach to the interaction in the final state and matched with the low-energy chiral dynamics in both final states.- 30 January 2023
- Published by American Physical Society (APS) in Physical Review D
- Vol. 107 (1) , 014027
Open AccessEmergence of heavy quark spin symmetry breaking in heavy quarkonium decays
Heavy-quark spin symmetry (HQSS) implies that in the direct decay of a heavy quarkonium with spin , only lower lying heavy quarkonia with the same spin can be produced. However, this selection rule, expected to work very well in the -quark sector, can be overcome if multiquark intermediate states are involved in the decay chain, allowing for transitions to the final-state heavy quarkonia with a different spin . In particular, the measured decays (, 2, 3) and (, 2) appear to have nearly equal strengths, which is conventionally explained by a simultaneous presence of both and components in the wave functions of the in equal shares. Meanwhile, the destructive interference between the contributions of the and to the decay amplitude for a final state kills the signal to zero in the strict HQSS limit. In this paper, we discuss how the HQSS violation needs to be balanced by the narrowness of the states in the physical case to allow for equal transition strengths into final states with different total heavy quark spins, and how spin symmetry is restored as a result of a subtle interplay of the scales involved, when the mass of a heavy quark becomes infinite. Moreover, we demonstrate how similar branching fractions of the decays into and can be obtained and how the mentioned HQSS breaking can be reconciled with the dispersive approach to the interaction in the final state and matched with the low-energy chiral dynamics in both final states. - 19 December 2022
- Published by American Physical Society (APS) in Physical Review C
- Vol. 106 (6) , 064003
Pion absorption from the lowest atomic orbital in , andThe , and capture reactions from the lowest atomic orbitals are studied under full inclusion of final state interactions. Our results are obtained with the single-nucleon and two-nucleon transition operators derived at leading order in chiral effective field theory. The initial and final three-nucleon states are calculated with the chiral nucleon-nucleon semilocal momentum space potential up to , augmented by the consistently regularized chiral three-nucleon potential. We found that absorption rates depend strongly on the nuclear pion absorption operator used, and its two-body parts change the rates by a few orders of magnitude. The final state interactions between nucleons generated by the two-nucleon forces are also important, while the three-nucleon interaction plays a visible role only in the reaction. Our absorption rate for the process is in good agreement with the experimental data from the hadronic ground-state broadening in pionic deuterium. The capture rates on are also generally consistent with the spectroscopic data within error bars, though our central values are found to be systematically below the data. We show that for the three-body breakup processes the dominant contributions to the absorption rates arise from the quasi-free scattering and final-state interaction kinematical configurations.- 19 December 2022
- Published by American Physical Society (APS) in Physical Review C
- Vol. 106 (6) , 064003
Pion absorption from the lowest atomic orbital in , andThe , and capture reactions from the lowest atomic orbitals are studied under full inclusion of final state interactions. Our results are obtained with the single-nucleon and two-nucleon transition operators derived at leading order in chiral effective field theory. The initial and final three-nucleon states are calculated with the chiral nucleon-nucleon semilocal momentum space potential up to , augmented by the consistently regularized chiral three-nucleon potential. We found that absorption rates depend strongly on the nuclear pion absorption operator used, and its two-body parts change the rates by a few orders of magnitude. The final state interactions between nucleons generated by the two-nucleon forces are also important, while the three-nucleon interaction plays a visible role only in the reaction. Our absorption rate for the process is in good agreement with the experimental data from the hadronic ground-state broadening in pionic deuterium. The capture rates on are also generally consistent with the spectroscopic data within error bars, though our central values are found to be systematically below the data. We show that for the three-body breakup processes the dominant contributions to the absorption rates arise from the quasi-free scattering and final-state interaction kinematical configurations.