We have studied the ND*K¯* system in the framework of the fixed center approximation to the Faddeev equations, taking the exotic D*K¯* system as the cluster and allowing the N to interact with the components of the cluster. Previous studies have determined the existence of three states of spin 0, 1, 2 for the D*K¯* system, the one of spin 0 associated to the X0(2900) state observed by the LHCb Collaboration. From this perspective, we find five states with total spin 1/2,3/2,5/2, with bindings from 10 to 30 MeV and widths below 60 MeV, which could be well identified. We also discuss the decay channels of these states that should help in future experimental searches for these states. Published by the American Physical Society2025
{"title":"Study of the exotic three-body ND*K¯* system","authors":"Qing-Yu Zhai, Raquel Molina, Eulogio Oset, Li-Sheng Geng","doi":"10.1103/physrevd.111.034039","DOIUrl":"https://doi.org/10.1103/physrevd.111.034039","url":null,"abstract":"We have studied the N</a:mi>D</a:mi></a:mrow>*</a:mo></a:mrow></a:msup>K</a:mi></a:mrow>¯</a:mo></a:mrow></a:mover></a:mrow>*</a:mo></a:mrow></a:msup></a:mrow></a:math> system in the framework of the fixed center approximation to the Faddeev equations, taking the exotic <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:msup><e:mi>D</e:mi><e:mo>*</e:mo></e:msup><e:msup><e:mover accent=\"true\"><e:mi>K</e:mi><e:mo stretchy=\"false\">¯</e:mo></e:mover><e:mo>*</e:mo></e:msup></e:math> system as the cluster and allowing the <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:mi>N</i:mi></i:math> to interact with the components of the cluster. Previous studies have determined the existence of three states of spin 0, 1, 2 for the <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:msup><k:mi>D</k:mi><k:mo>*</k:mo></k:msup><k:msup><k:mover accent=\"true\"><k:mi>K</k:mi><k:mo stretchy=\"false\">¯</k:mo></k:mover><k:mo>*</k:mo></k:msup></k:math> system, the one of spin 0 associated to the <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:msub><o:mi>X</o:mi><o:mn>0</o:mn></o:msub><o:mo stretchy=\"false\">(</o:mo><o:mn>2900</o:mn><o:mo stretchy=\"false\">)</o:mo></o:math> state observed by the LHCb Collaboration. From this perspective, we find five states with total spin <s:math xmlns:s=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><s:mn>1</s:mn><s:mo>/</s:mo><s:mn>2</s:mn><s:mo>,</s:mo><s:mn>3</s:mn><s:mo>/</s:mo><s:mn>2</s:mn><s:mo>,</s:mo><s:mn>5</s:mn><s:mo>/</s:mo><s:mn>2</s:mn></s:math>, with bindings from 10 to 30 MeV and widths below 60 MeV, which could be well identified. We also discuss the decay channels of these states that should help in future experimental searches for these states. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"29 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1103/physrevd.111.034512
Erik Lundstrum
We describe a generalization of the hybrid Monte Carlo (HMC) algorithm in which the molecular dynamics steps utilize Nambu generalized Hamiltonian dynamics. Nambu mechanics contains multiple Hamiltonian functions. Using one of these Hamiltonians in the Metropolis accept/reject step is enough to guarantee the correct target distribution. The other Hamiltonians can include arbitrary functions of the gauge field. We examine the simplest case with two Hamiltonians and choose the second to include nonlocal functions of the gauge field. In this way, the links are updated with instantaneous knowledge of far-separated link variables. This represents a promising method for reducing critical slowing down in lattice QCD simulations. Published by the American Physical Society2025
{"title":"Generalized HMC using Nambu mechanics for lattice QCD","authors":"Erik Lundstrum","doi":"10.1103/physrevd.111.034512","DOIUrl":"https://doi.org/10.1103/physrevd.111.034512","url":null,"abstract":"We describe a generalization of the hybrid Monte Carlo (HMC) algorithm in which the molecular dynamics steps utilize Nambu generalized Hamiltonian dynamics. Nambu mechanics contains multiple Hamiltonian functions. Using one of these Hamiltonians in the Metropolis accept/reject step is enough to guarantee the correct target distribution. The other Hamiltonians can include arbitrary functions of the gauge field. We examine the simplest case with two Hamiltonians and choose the second to include nonlocal functions of the gauge field. In this way, the links are updated with instantaneous knowledge of far-separated link variables. This represents a promising method for reducing critical slowing down in lattice QCD simulations. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"347 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We initiate the study of loop-level holographic correlators in the presence of defects. We present a unitarity method that constructs loop corrections from lower order data. As an example, we apply this method to 6D N=(2,0) theories with 12-BPS surface defects and report the first holographic two-point function at one loop. Published by the American Physical Society2025
{"title":"Unitarity method for holographic defects","authors":"Junding Chen, Aleix Gimenez-Grau, Hynek Paul, Xinan Zhou","doi":"10.1103/physrevd.111.l041703","DOIUrl":"https://doi.org/10.1103/physrevd.111.l041703","url":null,"abstract":"We initiate the study of loop-level holographic correlators in the presence of defects. We present a unitarity method that constructs loop corrections from lower order data. As an example, we apply this method to 6D N</a:mi>=</a:mo>(</a:mo>2</a:mn>,</a:mo>0</a:mn>)</a:mo></a:math> theories with <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><f:mfrac><f:mn>1</f:mn><f:mn>2</f:mn></f:mfrac></f:math>-BPS surface defects and report the first holographic two-point function at one loop. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"27 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1103/physrevd.111.046023
Adi Armoni, Ricardo Stuardo
We consider SQCD for Nf<Nc. We use a brane configuration in type IIA string theory to propose a Seiberg dual. The brane configuration that realizes the magnetic theory contains Nf branes and Nc−Nf antibranes, leading to an SU(Nc−Nf) gauge theory with Nf flavors. The potential between the branes triggers a RG flow, and we argue that the IR theory realizes the Affleck-Dine-Seiberg superpotential. We use both field theory arguments, in particular, anomaly matching, and a lift of the type IIA brane configuration to M theory, in order to support our proposal. Published by the American Physical Society2025
{"title":"Note on Seiberg duality for Nf","authors":"Adi Armoni, Ricardo Stuardo","doi":"10.1103/physrevd.111.046023","DOIUrl":"https://doi.org/10.1103/physrevd.111.046023","url":null,"abstract":"We consider SQCD for N</a:mi>f</a:mi></a:msub><</a:mo>N</a:mi>c</a:mi></a:msub></a:math>. We use a brane configuration in type IIA string theory to propose a Seiberg dual. The brane configuration that realizes the magnetic theory contains <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:msub><c:mi>N</c:mi><c:mi>f</c:mi></c:msub></c:math> branes and <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:msub><e:mi>N</e:mi><e:mi>c</e:mi></e:msub><e:mo>−</e:mo><e:msub><e:mi>N</e:mi><e:mi>f</e:mi></e:msub></e:math> antibranes, leading to an <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:mrow><g:mi>S</g:mi><g:mi>U</g:mi><g:mo stretchy=\"false\">(</g:mo><g:msub><g:mrow><g:mi>N</g:mi></g:mrow><g:mrow><g:mi>c</g:mi></g:mrow></g:msub><g:mo>−</g:mo><g:msub><g:mrow><g:mi>N</g:mi></g:mrow><g:mrow><g:mi>f</g:mi></g:mrow></g:msub><g:mo stretchy=\"false\">)</g:mo></g:mrow></g:math> gauge theory with <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:msub><k:mi>N</k:mi><k:mi>f</k:mi></k:msub></k:math> flavors. The potential between the branes triggers a RG flow, and we argue that the IR theory realizes the Affleck-Dine-Seiberg superpotential. We use both field theory arguments, in particular, anomaly matching, and a lift of the type IIA brane configuration to <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><m:mi>M</m:mi></m:math> theory, in order to support our proposal. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"26 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1103/physrevd.111.034036
Oscar Garcia-Montero, Philip Plaschke, Sören Schlichting
We use quantum chromodynamics (QCD) kinetic theory to compute dilepton production coming from the pre-equilibrium phase of the quark-gluon plasma created in high-energy heavy-ion collisions. We demonstrate that the dilepton spectrum exhibits a simple scaling in terms of the specific shear viscosity η/s and entropy density dS/dζ∼(Tτ1/3)∞3/2, which can be derived from dimensional analysis in the presence of a pre-equilibrium attractor. Based on this scaling we perform event-by-event calculations of in-medium dilepton production and determine the invariant mass range where the pre-equilibrium yield is the leading contribution. Published by the American Physical Society2025
{"title":"Scaling of pre-equilibrium dilepton production in QCD kinetic theory","authors":"Oscar Garcia-Montero, Philip Plaschke, Sören Schlichting","doi":"10.1103/physrevd.111.034036","DOIUrl":"https://doi.org/10.1103/physrevd.111.034036","url":null,"abstract":"We use quantum chromodynamics (QCD) kinetic theory to compute dilepton production coming from the pre-equilibrium phase of the quark-gluon plasma created in high-energy heavy-ion collisions. We demonstrate that the dilepton spectrum exhibits a simple scaling in terms of the specific shear viscosity η</a:mi>/</a:mo>s</a:mi></a:mrow></a:math> and entropy density <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mi>d</c:mi><c:mi>S</c:mi><c:mo>/</c:mo><c:mi>d</c:mi><c:mi>ζ</c:mi><c:mo>∼</c:mo><c:msubsup><c:mrow><c:mo stretchy=\"false\">(</c:mo><c:mi>T</c:mi><c:msup><c:mi>τ</c:mi><c:mrow><c:mn>1</c:mn><c:mo>/</c:mo><c:mn>3</c:mn></c:mrow></c:msup><c:mo stretchy=\"false\">)</c:mo></c:mrow><c:mi>∞</c:mi><c:mrow><c:mn>3</c:mn><c:mo>/</c:mo><c:mn>2</c:mn></c:mrow></c:msubsup></c:math>, which can be derived from dimensional analysis in the presence of a pre-equilibrium attractor. Based on this scaling we perform event-by-event calculations of in-medium dilepton production and determine the invariant mass range where the pre-equilibrium yield is the leading contribution. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"52 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In a recent paper [], the LHCb data on the di-J/ψ production in proton-proton collisions were analyzed in a coupled-channel framework based on double-vector-charmonium channels. This investigation identified a robust pole near the J/ψJ/ψ threshold, tagged X(6200), suggesting it as a new state. The present work extends that investigation by incorporating recent di-J/ψ production data from the CMS and ATLAS Collaborations and performing a combined analysis of all three datasets. This study confirms the existence of the X(6200), and its pole position is now determined with a higher precision than in the previous study, where only a single dataset was employed. The pole corresponding to the X(6900) is also extracted, though its actual position and residue depend on a particular coupled-channel model employed and deviate from values reported in the experimental investigations. Moreover, we demonstrate that the currently available data do not allow one to determine whether there is an additional pole in the studied mass range. The dielectron width of the X(6200) is estimated under different conjectures on its quantum numbers, and the number of such states that can be annually produced at the future Super τ-Charm Facility is estimated. The line shape in the complimentary J/ψψ(2S) channel is discussed, and a good agreement with the ATLAS data is found. Published by the American Physical Society2025
{"title":"Toward a precision determination of the X(6200) parameters from data","authors":"Yi-Lin Song, Yu Zhang, Vadim Baru, Feng-Kun Guo, Christoph Hanhart, Alexey Nefediev","doi":"10.1103/physrevd.111.034038","DOIUrl":"https://doi.org/10.1103/physrevd.111.034038","url":null,"abstract":"In a recent paper [], the LHCb data on the di-J</a:mi>/</a:mo>ψ</a:mi></a:math> production in proton-proton collisions were analyzed in a coupled-channel framework based on double-vector-charmonium channels. This investigation identified a robust pole near the <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mi>J</c:mi><c:mo>/</c:mo><c:mi>ψ</c:mi><c:mi>J</c:mi><c:mo>/</c:mo><c:mi>ψ</c:mi></c:math> threshold, tagged <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mi>X</e:mi><e:mo stretchy=\"false\">(</e:mo><e:mn>6200</e:mn><e:mo stretchy=\"false\">)</e:mo></e:math>, suggesting it as a new state. The present work extends that investigation by incorporating recent di-<i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:mi>J</i:mi><i:mo>/</i:mo><i:mi>ψ</i:mi></i:math> production data from the CMS and ATLAS Collaborations and performing a combined analysis of all three datasets. This study confirms the existence of the <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:mi>X</k:mi><k:mo stretchy=\"false\">(</k:mo><k:mn>6200</k:mn><k:mo stretchy=\"false\">)</k:mo></k:math>, and its pole position is now determined with a higher precision than in the previous study, where only a single dataset was employed. The pole corresponding to the <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mi>X</o:mi><o:mo stretchy=\"false\">(</o:mo><o:mn>6900</o:mn><o:mo stretchy=\"false\">)</o:mo></o:math> is also extracted, though its actual position and residue depend on a particular coupled-channel model employed and deviate from values reported in the experimental investigations. Moreover, we demonstrate that the currently available data do not allow one to determine whether there is an additional pole in the studied mass range. The dielectron width of the <s:math xmlns:s=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><s:mi>X</s:mi><s:mo stretchy=\"false\">(</s:mo><s:mn>6200</s:mn><s:mo stretchy=\"false\">)</s:mo></s:math> is estimated under different conjectures on its quantum numbers, and the number of such states that can be annually produced at the future Super <w:math xmlns:w=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><w:mi>τ</w:mi></w:math>-Charm Facility is estimated. The line shape in the complimentary <y:math xmlns:y=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><y:mi>J</y:mi><y:mo>/</y:mo><y:mi>ψ</y:mi><y:mi>ψ</y:mi><y:mo stretchy=\"false\">(</y:mo><y:mn>2</y:mn><y:mi>S</y:mi><y:mo stretchy=\"false\">)</y:mo></y:math> channel is discussed, and a good agreement with the ATLAS data is found. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"14 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1103/physrevd.111.044073
Ben G. Patterson, Sharon Mary Tomson, Stephen Fairhurst
We show that the gravitational waveform emitted by a binary on an eccentric orbit can be naturally decomposed into a series of harmonics. The frequencies of these harmonics depend upon the radial frequency, fr, determined by the time to return to apoapsis, and the azimuthal frequency, fϕ, determined by the time to complete one orbit relative to a fixed axis. These frequencies differ due to periapsis advance. Restricting to the (2, 2) multipole, we find that the frequencies can be expressed as f=2fϕ+kfr. We introduce a straightforward method of generating these harmonics and show that the majority of the signal power is contained in the k=−1,0,1 harmonics for moderate eccentricities. We demonstrate that by filtering these three leading harmonics, we are able to obtain a good estimate of the orbital eccentricity from their relative amplitudes. Published by the American Physical Society2025
{"title":"Identifying eccentricity in binary black hole mergers using a harmonic decomposition of the gravitational waveform","authors":"Ben G. Patterson, Sharon Mary Tomson, Stephen Fairhurst","doi":"10.1103/physrevd.111.044073","DOIUrl":"https://doi.org/10.1103/physrevd.111.044073","url":null,"abstract":"We show that the gravitational waveform emitted by a binary on an eccentric orbit can be naturally decomposed into a series of harmonics. The frequencies of these harmonics depend upon the radial frequency, f</a:mi></a:mrow>r</a:mi></a:mrow></a:msub></a:mrow></a:math>, determined by the time to return to apoapsis, and the azimuthal frequency, <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><d:mrow><d:msub><d:mrow><d:mi>f</d:mi></d:mrow><d:mrow><d:mi>ϕ</d:mi></d:mrow></d:msub></d:mrow></d:math>, determined by the time to complete one orbit relative to a fixed axis. These frequencies differ due to periapsis advance. Restricting to the (2, 2) multipole, we find that the frequencies can be expressed as <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><f:mrow><f:mi>f</f:mi><f:mo>=</f:mo><f:mn>2</f:mn><f:msub><f:mrow><f:mi>f</f:mi></f:mrow><f:mrow><f:mi>ϕ</f:mi></f:mrow></f:msub><f:mo>+</f:mo><f:mi>k</f:mi><f:msub><f:mrow><f:mi>f</f:mi></f:mrow><f:mrow><f:mi mathvariant=\"normal\">r</f:mi></f:mrow></f:msub></f:mrow></f:math>. We introduce a straightforward method of generating these harmonics and show that the majority of the signal power is contained in the <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:mrow><i:mi>k</i:mi><i:mo>=</i:mo><i:mo>−</i:mo><i:mn>1</i:mn><i:mo>,</i:mo><i:mn>0</i:mn><i:mo>,</i:mo><i:mn>1</i:mn></i:mrow></i:math> harmonics for moderate eccentricities. We demonstrate that by filtering these three leading harmonics, we are able to obtain a good estimate of the orbital eccentricity from their relative amplitudes. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"82 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1103/physrevd.111.l031505
Lorenzo Barca, Gunnar Bali, Sara Collins
We determine the nucleon-sigma terms from lattice quantum chromodynamics (QCD). We find that the dominant excited state contamination in the nucleon three-point function with a scalar current is due to the transition between the nucleon and a S-wave scattering state of a nucleon and a scalar (sigma) meson. In this proof-of-concept study, we analyze a single Nf=3 ensemble with the unphysically large pion mass Mπ=429MeV. Excited state contamination is substantially reduced compared to the standard method when employing nucleon-sigma type interpolating operators within a generalized eigenvector analysis. Published by the American Physical Society2025
{"title":"Nucleon sigma terms with a variational analysis from Lattice QCD","authors":"Lorenzo Barca, Gunnar Bali, Sara Collins","doi":"10.1103/physrevd.111.l031505","DOIUrl":"https://doi.org/10.1103/physrevd.111.l031505","url":null,"abstract":"We determine the nucleon-sigma terms from lattice quantum chromodynamics (QCD). We find that the dominant excited state contamination in the nucleon three-point function with a scalar current is due to the transition between the nucleon and a S-wave scattering state of a nucleon and a scalar (sigma) meson. In this proof-of-concept study, we analyze a single N</a:mi>f</a:mi></a:msub>=</a:mo>3</a:mn></a:math> ensemble with the unphysically large pion mass <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:msub><c:mi>M</c:mi><c:mi>π</c:mi></c:msub><c:mo>=</c:mo><c:mn>429</c:mn><c:mtext> </c:mtext><c:mtext> </c:mtext><c:mi>MeV</c:mi></c:math>. Excited state contamination is substantially reduced compared to the standard method when employing nucleon-sigma type interpolating operators within a generalized eigenvector analysis. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"85 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A discrepancy of approximately 5σ exists between the two known results for the tenth-order QED contribution to the anomalous magnetic moment of the electron, calculated from Feynman vertex diagrams without fermion loops. To investigate this, we decomposed this contribution into 389 parts based on a self-energy diagram representation, enabling a diagram-by-diagram numerical comparison of the two calculations. No significant discrepancies were found for individual diagrams. However, the numerical differences of the 98 diagrams sharing a common structure were not randomly distributed. The accumulation of these differences resulted in the 5σ discrepancy. A recalculation with increased statistics in the Monte Carlo integration was performed for these 98 diagrams. By replacing the old values with the new ones for these 98 integrals, we have obtained a revised result of 6.800±0.128, thereby resolving the discrepancy. Published by the American Physical Society2025
{"title":"Verification of the tenth-order QED contribution to the anomalous magnetic moment of the electron from diagrams without fermion loops","authors":"Tatsumi Aoyama, Masashi Hayakawa, Akira Hirayama, Makiko Nio","doi":"10.1103/physrevd.111.l031902","DOIUrl":"https://doi.org/10.1103/physrevd.111.l031902","url":null,"abstract":"A discrepancy of approximately 5</a:mn>σ</a:mi></a:mrow></a:math> exists between the two known results for the tenth-order QED contribution to the anomalous magnetic moment of the electron, calculated from Feynman vertex diagrams without fermion loops. To investigate this, we decomposed this contribution into 389 parts based on a self-energy diagram representation, enabling a diagram-by-diagram numerical comparison of the two calculations. No significant discrepancies were found for individual diagrams. However, the numerical differences of the 98 diagrams sharing a common structure were not randomly distributed. The accumulation of these differences resulted in the <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mrow><c:mn>5</c:mn><c:mi>σ</c:mi></c:mrow></c:math> discrepancy. A recalculation with increased statistics in the Monte Carlo integration was performed for these 98 diagrams. By replacing the old values with the new ones for these 98 integrals, we have obtained a revised result of <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mn>6.800</e:mn><e:mo>±</e:mo><e:mn>0.128</e:mn></e:math>, thereby resolving the discrepancy. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"22 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-25DOI: 10.1103/physrevd.111.034513
Tomoya Hayata, Yoshimasa Hidaka
We simulate Floquet time evolution of a truncated SU(3) lattice Yang-Mills theory on a two-leg ladder geometry under open boundary conditions using IBM’s superconducting 156-qubit device ibm_fez. To this end, we derive the quantum spin representation of the lattice Yang-Mills theory and compose a quantum circuit carefully tailored to hardware, reducing the number of controlled-Z gates. Since it is still challenging to simulate Hamiltonian evolution in present noisy quantum processors, we make the step size in the Suzuki-Trotter decomposition very large and simulate thermalization dynamics in Floquet circuit composed of the Suzuki-Trotter evolution. We demonstrate that IBM’s Heron quantum processor can simulate, by error mitigation, Floquet thermalization dynamics in a large system consisting of 62 qubits. Our work would be a benchmark for further quantum simulations of lattice gauge theories using real devices. Published by the American Physical Society2025
{"title":"Floquet evolution of the q -deformed SU(3)1 Yang-Mills theory on a two-leg ladder","authors":"Tomoya Hayata, Yoshimasa Hidaka","doi":"10.1103/physrevd.111.034513","DOIUrl":"https://doi.org/10.1103/physrevd.111.034513","url":null,"abstract":"We simulate Floquet time evolution of a truncated SU(3) lattice Yang-Mills theory on a two-leg ladder geometry under open boundary conditions using IBM’s superconducting 156-qubit device ibm_fez. To this end, we derive the quantum spin representation of the lattice Yang-Mills theory and compose a quantum circuit carefully tailored to hardware, reducing the number of controlled-Z gates. Since it is still challenging to simulate Hamiltonian evolution in present noisy quantum processors, we make the step size in the Suzuki-Trotter decomposition very large and simulate thermalization dynamics in Floquet circuit composed of the Suzuki-Trotter evolution. We demonstrate that IBM’s Heron quantum processor can simulate, by error mitigation, Floquet thermalization dynamics in a large system consisting of 62 qubits. Our work would be a benchmark for further quantum simulations of lattice gauge theories using real devices. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"25 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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