Physical Review D最新文献_第2页

Analysis of qrec2 -distribution for B→KMX and B→K*MX decays in a scalar-mediator dark-matter scenario 暗物质尺度介质中B→KMX和B→K*MX衰变的qrec2分布分析

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-05-01 DOI: 10.1103/physrevd.111.075035

Alexander Berezhnoy, Wolfgang Lucha, Dmitri Melikhov

引用次数: 0

Scaling of stochastic normalizing flows in SU(3) lattice gauge theory SU(3)晶格规范理论中随机归一化流的标度

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-05-01 DOI: 10.1103/physrevd.111.074517

Andrea Bulgarelli, Elia Cellini, Alessandro Nada

{"title":"Scaling of stochastic normalizing flows in SU(3) lattice gauge theory","authors":"Andrea Bulgarelli, Elia Cellini, Alessandro Nada","doi":"10.1103/physrevd.111.074517","DOIUrl":"https://doi.org/10.1103/physrevd.111.074517","url":null,"abstract":"Nonequilibrium Markov chain Monte Carlo (NE-MCMC) simulations provide a well-understood framework based on Jarzynski’s equality to sample from a target probability distribution. By driving a base probability distribution out of equilibrium, observables are computed without the need to thermalize. If the base distribution is characterized by mild autocorrelations, this approach provides a way to mitigate critical slowing down. Out-of-equilibrium evolutions share the same framework of flow-based approaches and they can be naturally combined into a novel architecture called stochastic normalizing flows (SNFs). In this work we present the first implementation of SNFs for SU(3) lattice gauge theory in 4 dimensions, defined by introducing gauge-equivariant layers between out-of-equilibrium Monte Carlo updates. The core of our analysis is focused on the promising scaling properties of this architecture with the degrees of freedom of the system, which are directly inherited from NE-MCMC. Finally, we discuss how systematic improvements of this approach can realistically lead to a general and yet efficient sampling strategy at fine lattice spacings for observables affected by long autocorrelation times. Published by the American Physical Society 2025 ","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"38 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143897704","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}

引用次数: 0

Investigating two-loop effects for first-order electroweak phase transitions 研究一阶电弱相变的双环效应

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-05-01 DOI: 10.1103/physrevd.111.075034

Lauri Niemi, Tuomas V. I. Tenkanen

{"title":"Investigating two-loop effects for first-order electroweak phase transitions","authors":"Lauri Niemi, Tuomas V. I. Tenkanen","doi":"10.1103/physrevd.111.075034","DOIUrl":"https://doi.org/10.1103/physrevd.111.075034","url":null,"abstract":"We study first-order electroweak phase transitions in the real-singlet-extended Standard Model, for which nonzero mixing between the Higgs field and the singlet can efficiently strengthen the transitions. We perform large-scale parameter-space scans of the model using two-loop effective potential at next-to-next-to-leading order in the high-temperature expansion, greatly improving description of phase transition thermodynamics over existing one-loop studies. We find that (1) two-loop corrections to the effective potential lead to narrower regions of strong first-order transitions and significantly smaller critical temperatures, (2) transitions involving a discontinuity in the singlet expectation value are significantly stronger at two-loop order, and (3) high-temperature expansion is accurate for a wide range of parameter space that allows strong transitions, although it is less reliable for the very strongest transitions. These findings suggest revisiting past studies that connect the possibility of a first-order electroweak phase transition with future collider phenomenology. Published by the American Physical Society 2025 ","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"1 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143897703","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}

引用次数: 0

Does the Sun have a dark disk? 太阳有一个暗盘吗？

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-05-01 DOI: 10.1103/physrevd.111.083057

Gustavo F. S. Alves, Susan Gardner, Pedro Machado, Mohammadreza Zakeri

{"title":"Does the Sun have a dark disk?","authors":"Gustavo F. S. Alves, Susan Gardner, Pedro Machado, Mohammadreza Zakeri","doi":"10.1103/physrevd.111.083057","DOIUrl":"https://doi.org/10.1103/physrevd.111.083057","url":null,"abstract":"The Sun is not quite a perfect sphere, and its oblateness, thought to be induced through its rotation, has been measured using optical observations of its radius. Its gravitational quadrupole moment can then be deduced using solar models, or through helioseismology, and it can also be determined from measurements of its gravitational effects on Mercury’s orbit. The various assessments do not appear to agree, with the most complete and precise orbital assessments being in slight excess of other determinations. This may speak to the existence of a nonluminous disk or ring, where we also note evidence for a circumsolar dust ring within Mercury’s orbit from the Solar TErrestrial RElations Observatory (STEREO) mission. Historically, too, a protoplanetary disk may have been key to reconciling the Sun’s metallicity with its neutrino yield. The distribution of the nonluminous mass within Mercury’s orbit can modify the relative size of the optical and orbital quadrupole moments in different ways. We develop how we can use these findings to limit the mass of a dark disk, ring, or halo in the immediate vicinity of the Sun, and we note how future observational studies of the inner Solar System can not only refine these constraints but can also help to identify and to assess the mass of its dark-matter component. Published by the American Physical Society 2025 ","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"224 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143897705","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}

引用次数: 0

Impact of glasma on heavy flavor azimuthal correlations and spectra 等离子体对重味方位角相关性和光谱的影响

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-04-29 DOI: 10.1103/physrevd.111.074036

Dana Avramescu, Vincenzo Greco, Tuomas Lappi, Heikki Mäntysaari, David Müller

{"title":"Impact of glasma on heavy flavor azimuthal correlations and spectra","authors":"Dana Avramescu, Vincenzo Greco, Tuomas Lappi, Heikki Mäntysaari, David Müller","doi":"10.1103/physrevd.111.074036","DOIUrl":"https://doi.org/10.1103/physrevd.111.074036","url":null,"abstract":"We study the phenomenological impact of the preequilibrium glasma initial stage of heavy-ion collisions on heavy quark azimuthal correlations and spectra. Using our numerical solver, we simulate the transport of heavy quark test particles in an SU(3) glasma background field. The glasma field equations are formulated using classical real-time lattice gauge theory, and the heavy quark dynamics are described by classical transport equations numerically solved using the colored particle-in-cell method. For the first time, the effect of the glasma stage on the azimuthal correlations of c</a:mi>c</a:mi></a:mrow>¯</a:mo></a:mrow></a:mover></a:mrow></a:math> and <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mi>b</e:mi><e:mover accent=\"true\"><e:mi>b</e:mi><e:mo stretchy=\"false\">¯</e:mo></e:mover></e:math> pairs is studied. The resulting azimuthal width <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:msub><i:mi>σ</i:mi><i:mrow><i:mi mathvariant=\"normal\">Δ</i:mi><i:mi>ϕ</i:mi></i:mrow></i:msub></i:math> exhibits a large and quick decorrelation due to the strong glasma fields. Further, we evaluate how the <l:math xmlns:l=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><l:msub><l:mi>p</l:mi><l:mi>T</l:mi></l:msub></l:math>-broadening in the glasma affects heavy quark <n:math xmlns:n=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><n:msub><n:mi>p</n:mi><n:mi>T</n:mi></n:msub></n:math>-spectra, which are initialized according to the Fixed-Order Next-to-Leading Logarithm (FONLL) heavy quark production calculation. The nuclear modification factor <p:math xmlns:p=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><p:msub><p:mi>R</p:mi><p:mrow><p:mi>A</p:mi><p:mi>A</p:mi></p:mrow></p:msub></p:math> is extracted for <r:math xmlns:r=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><r:mi>c</r:mi></r:math> and <t:math xmlns:t=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><t:mi>b</t:mi></t:math> quarks in the glasma and additional nuclear PDF effects accounting for gluon shadowing are included. Published by the American Physical Society 2025 ","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"10 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143889570","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}

引用次数: 0

Wilsonian renormalization group and thermal field theory in the Schwinger-Keldysh closed-time-path formalism Schwinger-Keldysh闭时径形式主义中的威尔逊重整化群和热场理论

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-04-29 DOI: 10.1103/physrevd.111.085034

Giorgio Frangi, Sašo Grozdanov

{"title":"Wilsonian renormalization group and thermal field theory in the Schwinger-Keldysh closed-time-path formalism","authors":"Giorgio Frangi, Sašo Grozdanov","doi":"10.1103/physrevd.111.085034","DOIUrl":"https://doi.org/10.1103/physrevd.111.085034","url":null,"abstract":"We study perturbative Wilsonian renormalization group (RG) for the scalar ϕ</a:mi>4</a:mn></a:msup></a:math> theory at finite temperature to one loop order in the Schwinger-Keldysh closed-time-path (CTP) formalism. By explicitly integrating out the UV modes, we show how effective interactions coupling the two branches of the CTP contour arise. This provides a microscopic derivation of the type of effective CTP actions used in the literature. While the full effective theory has no critical points, we instead proceed to study critical properties of the RG flow in a reduced space of complex couplings that characterize certain time-ordered correlators and show the existence of two novel fixed points in <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mi>d</c:mi><c:mo>=</c:mo><c:mn>4</c:mn></c:math> spacetime dimensions. We relate one to the Wilson-Fisher fixed point known to exist only in <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mn>4</e:mn><e:mo>−</e:mo><e:mi>ε</e:mi></e:math> dimensions, and the other to the standard Gaussian fixed point. Published by the American Physical Society 2025 ","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"43 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143889693","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}

引用次数: 0

Is inflationary magnetogenesis sensitive to the postinflationary history? 暴胀磁生对后暴胀历史敏感吗？

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-04-29 DOI: 10.1103/physrevd.111.083550

Konstantinos Dimopoulos, Anish Ghoshal, Theodoros Papanikolaou

引用次数: 0

Right-handed neutrino production through first-generation leptoquarks 通过第一代轻夸克产生右手中微子

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-04-29 DOI: 10.1103/physrevd.111.075032

Gokul Duraikandan, Rishabh Khanna, Tanumoy Mandal, Subhadip Mitra, Rachit Sharma

{"title":"Right-handed neutrino production through first-generation leptoquarks","authors":"Gokul Duraikandan, Rishabh Khanna, Tanumoy Mandal, Subhadip Mitra, Rachit Sharma","doi":"10.1103/physrevd.111.075032","DOIUrl":"https://doi.org/10.1103/physrevd.111.075032","url":null,"abstract":"The collider phenomenology of leptoquarks (LQs) and right-handed neutrinos (RHNs) has been studied extensively in the literature. Due to their gauge singlet nature, the production of RHNs at the LHC is typically suppressed by the tiny light-heavy neutrino mixing angles. In this study, we explore a promising scenario where the presence of a LQ mediator significantly enhances the RHN production: the LQ essentially couples only to first-generation fermions (quarks and leptons, including the RHN), and the coupling with the first-generation RHN dominates. We consider all possible scalar and vector LQs that could lead to such a scenario. The prospects are better for the first-generation scenario than the other generations because of the enhanced parton distribution functions (PDFs) of first-generation quarks. The enhanced PDFs boost the production cross sections of LQs, particularly their single and indirect productions. Incorporating all production modes of LQs that result in a pair of RHNs, we estimate the discovery prospects by analyzing the monoelectron and dielectron channels arising from the decay of the RHN pair. We find that the indirect production of LQs is crucial in determining the discovery reach at the HL-LHC for the first-generation scenario. Published by the American Physical Society 2025 ","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"19 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143889696","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}

引用次数: 0

Quantum energies of solitons with different topological charges 具有不同拓扑电荷的孤子的量子能量

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-04-29 DOI: 10.1103/physrevd.111.085031

N. Graham, H. Weigel

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Production and decay of the X0(2900) state with different interpretations 不同解释下的X0（2900）态的产生和衰减

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-04-29 DOI: 10.1103/physrevd.111.076030

Zi-Yan Yang, Qian Wang, Wei Chen

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