Pub Date : 2023-08-23DOI: 10.1103/physrevd.108.043526
G. Tasinato
{"title":"Large |η| approach to single field inflation","authors":"G. Tasinato","doi":"10.1103/physrevd.108.043526","DOIUrl":"https://doi.org/10.1103/physrevd.108.043526","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44661642","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 : 2023-08-22DOI: 10.1103/physrevd.108.044046
D. Dey, N. Layden, A. Coley, P. Joshi
{"title":"Equilibrium condition in gravitational collapse and its application to a cosmological scenario","authors":"D. Dey, N. Layden, A. Coley, P. Joshi","doi":"10.1103/physrevd.108.044046","DOIUrl":"https://doi.org/10.1103/physrevd.108.044046","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47887366","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 : 2023-08-22DOI: 10.1103/PhysRevD.108.044048
C. Savvopoulos, P. Stavrinos
In this work we investigate the anisotropic conformal structure of the gravitational field incorporating dark gravity in a generalized Lagrange geometric framework on the Lorentz tangent bundle and we present two applications; the anisotropic conformal Minkowski spacetime and the anisotropic conformal FLRW cosmology. In the first application, the conformal factor induces an anisotropic conformal de-Sitter-like space with extra curvature which causes extra gravity and allows for Sasaki-type Finsler-like structures which could potentially describe certain gravitational phenomena in a more extended form. The cosmological properties of the model are also studied using a FLRW metric structure for the underlying base manifold in the second application, where we derive generalized Friedmann-like equations for the horizontal subspace of the Lorentz tangent bundle spacetime that reduce under certain conditions to those given by A. Triantafyllopoulos and P. C. Stavrinos (2018) [Class. Quantum Grav. 35 085011] as well as those of general relativity.
在这项工作中，我们研究了在洛伦兹切束上的广义拉格朗日几何框架中包含暗重力的引力场的各向异性共形结构，并给出了两个应用;各向异性共形闵可夫斯基时空和各向异性共形FLRW宇宙学。在第一个应用中，共形因子诱导出具有额外曲率的各向异性共形de-Sitter-like空间，从而产生额外的重力，并允许sasaki型Finsler-like结构以更扩展的形式潜在地描述某些引力现象。在第二个应用中，我们还使用底层基流形的FLRW度量结构研究了该模型的宇宙学性质，其中我们推导了洛伦兹切束时空水平子空间的广义类弗里德曼方程，该方程在某些条件下简化为a . Triantafyllopoulos和P. C. Stavrinos (2018) [Class]给出的方程。量子引力[35 085011]以及广义相对论。
{"title":"Anisotropic conformal dark gravity on the Lorentz tangent bundle spacetime","authors":"C. Savvopoulos, P. Stavrinos","doi":"10.1103/PhysRevD.108.044048","DOIUrl":"https://doi.org/10.1103/PhysRevD.108.044048","url":null,"abstract":"In this work we investigate the anisotropic conformal structure of the gravitational field incorporating dark gravity in a generalized Lagrange geometric framework on the Lorentz tangent bundle and we present two applications; the anisotropic conformal Minkowski spacetime and the anisotropic conformal FLRW cosmology. In the first application, the conformal factor induces an anisotropic conformal de-Sitter-like space with extra curvature which causes extra gravity and allows for Sasaki-type Finsler-like structures which could potentially describe certain gravitational phenomena in a more extended form. The cosmological properties of the model are also studied using a FLRW metric structure for the underlying base manifold in the second application, where we derive generalized Friedmann-like equations for the horizontal subspace of the Lorentz tangent bundle spacetime that reduce under certain conditions to those given by A. Triantafyllopoulos and P. C. Stavrinos (2018) [Class. Quantum Grav. 35 085011] as well as those of general relativity.","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48739186","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 : 2023-08-22DOI: 10.1103/physrevd.108.035031
Kentaro Kojima, K. Takenaga, T. Yamashita
{"title":"Grand gauge-Higgs unification on T2/Z","authors":"Kentaro Kojima, K. Takenaga, T. Yamashita","doi":"10.1103/physrevd.108.035031","DOIUrl":"https://doi.org/10.1103/physrevd.108.035031","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41694035","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 : 2023-08-22DOI: 10.1103/physrevd.108.063004
H. Sotani, T. Kojo
We examine the gravitational wave frequencies of the fundamental ($f$-) and 1st pressure ($p_1$-) modes excited in the neutron star models constructed with the quark-hadron crossover (QHC) type equations of state (EOS). We find that the $f$-mode frequencies with QHC EOS basically are smaller and the $p_1$-mode frequencies with QHC EOS are larger than those with hadronic EOS, focusing on the neutron star model with a fixed mass. We also find that the universality in the $f$-mode frequencies multiplied by the stellar mass as a function of the stellar compactness or as a function of the dimensionless tidal deformability, which is derived with various hadronic EOSs, can keep even with QHC EOS. That is, using these universal relations, one cannot distinguish QHC EOS from hadronic EOSs. Instead, using the relations one can extract the stellar radii whose evolution from low to high mass neutron stars can differentiate QHC from hadronic EOSs. On the other hand, we find that the $p_1$-mode frequencies multiplied by the stellar mass with QHC EOS significantly deviate in a certain mass range from the corresponding empirical relations derived with various hadronic EOSs, with which one may distinguish QHC EOS from hadronic EOSs.
{"title":"Universality in quasinormal modes of neutron stars with quark-hadron crossover","authors":"H. Sotani, T. Kojo","doi":"10.1103/physrevd.108.063004","DOIUrl":"https://doi.org/10.1103/physrevd.108.063004","url":null,"abstract":"We examine the gravitational wave frequencies of the fundamental ($f$-) and 1st pressure ($p_1$-) modes excited in the neutron star models constructed with the quark-hadron crossover (QHC) type equations of state (EOS). We find that the $f$-mode frequencies with QHC EOS basically are smaller and the $p_1$-mode frequencies with QHC EOS are larger than those with hadronic EOS, focusing on the neutron star model with a fixed mass. We also find that the universality in the $f$-mode frequencies multiplied by the stellar mass as a function of the stellar compactness or as a function of the dimensionless tidal deformability, which is derived with various hadronic EOSs, can keep even with QHC EOS. That is, using these universal relations, one cannot distinguish QHC EOS from hadronic EOSs. Instead, using the relations one can extract the stellar radii whose evolution from low to high mass neutron stars can differentiate QHC from hadronic EOSs. On the other hand, we find that the $p_1$-mode frequencies multiplied by the stellar mass with QHC EOS significantly deviate in a certain mass range from the corresponding empirical relations derived with various hadronic EOSs, with which one may distinguish QHC EOS from hadronic EOSs.","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44204417","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 : 2023-08-22DOI: 10.1103/PhysRevD.108.044043
J. B. Formiga, J. Duarte
The lack of a well-established solution for the gravitational energy problem might be one of the reasons why a clear road to quantum gravity does not exist. In this paper, the gravitational energy is studied in detail with the help of the teleparallel approach that is equivalent to general relativity. This approach is applied to the solutions of the Einstein-Maxwell equations known as $pp$-wave spacetimes. The quantization of the electromagnetic energy is assumed and it is shown that the proper area measured by an observer must satisfy an equation for consistency. The meaning of this equation is discussed and it is argued that the spacetime geometry should become discrete once all matter fields are quantized, including the constituents of the frame; it is shown that for a harmonic oscillation with wavelength $lambda_0$, the area and the volume take the form $A=4(N+1/2)l_p^2/n$ and $V=2(N+1/2)l_p^2lambda_0$, where $N$ is the number of photons, $l_p$ the Planck length, and $n$ is a natural number associated with the length along the $z$-axis of a box with cross-sectional area $A$. The localization of the gravitational energy problem is also discussed. The stress-energy tensors for the gravitational and electromagnetic fields are decomposed into energy density, pressures and heat flow. The resultant expressions are consistent with the properties of the fields, thus indicating that one can have a well-defined energy density for the gravitational field regardless of the principle of equivalence.
{"title":"Gravitational energy problem and the energy of photons","authors":"J. B. Formiga, J. Duarte","doi":"10.1103/PhysRevD.108.044043","DOIUrl":"https://doi.org/10.1103/PhysRevD.108.044043","url":null,"abstract":"The lack of a well-established solution for the gravitational energy problem might be one of the reasons why a clear road to quantum gravity does not exist. In this paper, the gravitational energy is studied in detail with the help of the teleparallel approach that is equivalent to general relativity. This approach is applied to the solutions of the Einstein-Maxwell equations known as $pp$-wave spacetimes. The quantization of the electromagnetic energy is assumed and it is shown that the proper area measured by an observer must satisfy an equation for consistency. The meaning of this equation is discussed and it is argued that the spacetime geometry should become discrete once all matter fields are quantized, including the constituents of the frame; it is shown that for a harmonic oscillation with wavelength $lambda_0$, the area and the volume take the form $A=4(N+1/2)l_p^2/n$ and $V=2(N+1/2)l_p^2lambda_0$, where $N$ is the number of photons, $l_p$ the Planck length, and $n$ is a natural number associated with the length along the $z$-axis of a box with cross-sectional area $A$. The localization of the gravitational energy problem is also discussed. The stress-energy tensors for the gravitational and electromagnetic fields are decomposed into energy density, pressures and heat flow. The resultant expressions are consistent with the properties of the fields, thus indicating that one can have a well-defined energy density for the gravitational field regardless of the principle of equivalence.","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42525695","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 : 2023-08-22DOI: 10.1103/physrevd.108.032018
A. Bashyal, S. Akhter, Z. Ahmad Dar, F. Akbar, V. Ansari, M. Ascencio, M. Sajjad Athar, A. Bercellie, M. Betancourt, A. Bodek, J. L. Bonilla, A. Bravar, H. Budd, G. Caceres, T. Cai, M. Carneiro, G. A. Dı́az, J. Félix, L. Fields, A. Filkins, R. Fine, A. M. Gago, H. Gallagher, P. Gaur, S. Gilligan, R. Gran, E. Granados, D. Harris, S. Henry, D. Jena, S. Jena, J. Kleykamp, A. Klustová, M. Kordosky, D. Last, T. Le, A. Lozano, X.-G. Lu, E. Maher, S. Manly, W. A. Mann, C. Mauger, K. McFarland, A. McGowan, B. Messerly, J. Miller, O. Moreno, J. Morfín, D. Naples, J. Nelson, C. Nguyen, A. Olivier, V. Paolone, G. Perdue, K. Plows, M. A. Ramírez, R. Ransome, H. Ray, D. Ruterbories, H. Schellman, C. Solano Salinas, H. Su, M. Sultana, V. Syrotenko, E. Valencia, N. Vaughan, A. Waldron, C. Wret, B. Yaeggy, L. Zazueta
{"title":"High-statistics measurement of antineutrino quasielasticlike scattering at Eν","authors":"A. Bashyal, S. Akhter, Z. Ahmad Dar, F. Akbar, V. Ansari, M. Ascencio, M. Sajjad Athar, A. Bercellie, M. Betancourt, A. Bodek, J. L. Bonilla, A. Bravar, H. Budd, G. Caceres, T. Cai, M. Carneiro, G. A. Dı́az, J. Félix, L. Fields, A. Filkins, R. Fine, A. M. Gago, H. Gallagher, P. Gaur, S. Gilligan, R. Gran, E. Granados, D. Harris, S. Henry, D. Jena, S. Jena, J. Kleykamp, A. Klustová, M. Kordosky, D. Last, T. Le, A. Lozano, X.-G. Lu, E. Maher, S. Manly, W. A. Mann, C. Mauger, K. McFarland, A. McGowan, B. Messerly, J. Miller, O. Moreno, J. Morfín, D. Naples, J. Nelson, C. Nguyen, A. Olivier, V. Paolone, G. Perdue, K. Plows, M. A. Ramírez, R. Ransome, H. Ray, D. Ruterbories, H. Schellman, C. Solano Salinas, H. Su, M. Sultana, V. Syrotenko, E. Valencia, N. Vaughan, A. Waldron, C. Wret, B. Yaeggy, L. Zazueta","doi":"10.1103/physrevd.108.032018","DOIUrl":"https://doi.org/10.1103/physrevd.108.032018","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43531419","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 : 2023-08-18DOI: 10.1103/physrevd.108.046014
Casey Cartwright, Markus Garbiso Amano, M. Kaminski, J. Noronha, E. Speranza
{"title":"Convergence of hydrodynamics in a rotating strongly coupled plasma","authors":"Casey Cartwright, Markus Garbiso Amano, M. Kaminski, J. Noronha, E. Speranza","doi":"10.1103/physrevd.108.046014","DOIUrl":"https://doi.org/10.1103/physrevd.108.046014","url":null,"abstract":"","PeriodicalId":48711,"journal":{"name":"Physical Review D","volume":" ","pages":""},"PeriodicalIF":5.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44451132","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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