Physical Review D最新文献

{"title":"QCD moat regime and its real-time properties","authors":"Wei-jie Fu, Jan M. Pawlowski, Robert D. Pisarski, Fabian Rennecke, Rui Wen, Shi Yin","doi":"10.1103/physrevd.111.094026","DOIUrl":"https://doi.org/10.1103/physrevd.111.094026","url":null,"abstract":"Dense quantum chromodynamics (QCD) matter may exhibit crystalline phases. Their existence is reflected in a moat regime, where mesonic correlations feature spatial modulations. We study the real-time properties of pions at finite temperature and density in QCD in order to elucidate the nature of this regime. We show that the moat regime arises from particle-hole-like fluctuations near the Fermi surface. This gives rise to a characteristic peak in the spectral function of the pion at nonzero spacelike momentum. This peak can be interpreted as a new quasi particle, the moaton. In addition, our framework also allows us to directly test the stability of the homogeneous chiral phase against the formation of an inhomogeneous condensate in QCD. We find that an inhomogeneous instability is highly unlikely for baryon chemical potentials μ</a:mi></a:mrow>B</a:mi></a:mrow></a:msub>≤</a:mo>630</a:mn></a:mtext></a:mtext>MeV</a:mi></a:mrow></a:math>. <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":"13 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066843","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}

{"title":"Reconstructing parametric gravitational-wave population fits from nonparametric results without refitting the data","authors":"Cecilia Maria Fabbri, Davide Gerosa, Alessandro Santini, Matthew Mould, Alexandre Toubiana, Jonathan Gair","doi":"10.1103/physrevd.111.104053","DOIUrl":"https://doi.org/10.1103/physrevd.111.104053","url":null,"abstract":"Combining multiple events into population analyses is a cornerstone of gravitational-wave astronomy. A critical component of such studies is the assumed population model, which can range from astrophysically motivated functional forms to nonparametric treatments that are flexible but difficult to interpret. In practice, the current approach is to fit the data multiple times with different population models to identify robust features. We propose an alternative strategy: assuming the data have already been fit with a flexible model, we present a practical recipe to reconstruct the population distribution of a different model. As our procedure postprocesses existing results, it avoids the need to access the underlying gravitational-wave data again and handle selection effects. Additionally, our reconstruction metric provides a goodness-of-fit measure to compare multiple models. We apply this method to the mass distribution of black-hole binaries detected by LIGO/Virgo/KAGRA. Our work paves the way for streamlined gravitational-wave population analyses by first fitting the data with advanced nonparametric methods and careful handling of selection effects, while the astrophysical interpretation is then made accessible using our reconstruction procedure on targeted models. The key principle is that of conceptually separating data description from data interpretation. <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":"41 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066836","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}

{"title":"Strong backreaction of gauge quanta produced during inflation","authors":"Jian-Feng He, Kai-Ge Zhang, Chengjie Fu, Zong-Kuan Guo","doi":"10.1103/physrevd.111.103525","DOIUrl":"https://doi.org/10.1103/physrevd.111.103525","url":null,"abstract":"During inflation, an axion field coupled to a gauge field through a Chern-Simons term can trigger the production of gauge quanta due to a tachyonic instability. The amplification of the gauge field modes exponentially depends on the velocity of the axion field, which in turn slows down the rolling of the axion field when backreaction is taken into account. To illustrate how the strength of the Chern-Simons coupling and the slope of the axion potential influence the particle production, in this paper we consider a toy model in which the axion field is a spectator with a linear potential. In the strong backreaction regime, the energy density of the gauge field quasiperiodically oscillates. The steep slope of the axion potential linearly increases the peak amplitude of the energy density while the strong coupling linearly decreases the peak amplitude. Additionally, we calculate the energy spectrum of gravitational waves. <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":"40 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066838","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}

{"title":"Contrastive learning for robust representations of neutrino data","authors":"Alex Wilkinson, Radi Radev, Saúl Alonso-Monsalve","doi":"10.1103/physrevd.111.092011","DOIUrl":"https://doi.org/10.1103/physrevd.111.092011","url":null,"abstract":"In neutrino physics, analyses often depend on large simulated datasets, making it essential for models to generalize effectively to real-world detector data. Contrastive learning, a well-established technique in deep learning, offers a promising solution to this challenge. By applying controlled data augmentations to simulated data, contrastive learning enables the extraction of robust and transferable features. This improves the ability of models trained on simulations to adapt to real experimental data distributions. In this paper, we investigate the application of contrastive learning methods in the context of neutrino physics. Through a combination of empirical evaluations and theoretical insights, we demonstrate how contrastive learning enhances model performance and adaptability. Additionally, we compare it to other domain adaptation techniques, highlighting the unique advantages of contrastive learning for this field. <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":"141 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066902","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}

{"title":"LHC and HL-LHC bounds on visible and invisible Z′ decays in the B−L model","authors":"Farinaldo S. Queiroz, Jilberto Zamora-Saa, Ricardo C. Silva, Y. M. Oviedo-Torres","doi":"10.1103/physrevd.111.095021","DOIUrl":"https://doi.org/10.1103/physrevd.111.095021","url":null,"abstract":"In this work, we use published results by the ATLAS Collaboration collected at LHC Run 2 at a center-of-mass energy of s&lt;/a:mi&gt;&lt;/a:msqrt&gt;=&lt;/a:mo&gt;13&lt;/a:mn&gt;&lt;/a:mtext&gt;&lt;/a:mtext&gt;TeV&lt;/a:mi&gt;&lt;/a:math&gt; with an integrated luminosity of &lt;c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;c:mn&gt;139&lt;/c:mn&gt;&lt;c:mtext&gt; &lt;/c:mtext&gt;&lt;c:mtext&gt; &lt;/c:mtext&gt;&lt;c:msup&gt;&lt;c:mi&gt;fb&lt;/c:mi&gt;&lt;c:mrow&gt;&lt;c:mo&gt;−&lt;/c:mo&gt;&lt;c:mn&gt;1&lt;/c:mn&gt;&lt;/c:mrow&gt;&lt;/c:msup&gt;&lt;/c:math&gt; to derive lower-mass limits on the &lt;e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;e:msup&gt;&lt;e:mi&gt;Z&lt;/e:mi&gt;&lt;e:mo&gt;′&lt;/e:mo&gt;&lt;/e:msup&gt;&lt;/e:math&gt; gauge boson associated with the &lt;g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;g:mi&gt;B&lt;/g:mi&gt;&lt;g:mo&gt;−&lt;/g:mo&gt;&lt;g:mi&gt;L&lt;/g:mi&gt;&lt;/g:math&gt; gauge symmetry. Using dilepton data, we find that &lt;i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;i:msub&gt;&lt;i:mi&gt;M&lt;/i:mi&gt;&lt;i:msup&gt;&lt;i:mi&gt;Z&lt;/i:mi&gt;&lt;i:mo&gt;′&lt;/i:mo&gt;&lt;/i:msup&gt;&lt;/i:msub&gt;&lt;i:mo&gt;&gt;&lt;/i:mo&gt;&lt;i:mn&gt;4&lt;/i:mn&gt;&lt;i:mtext&gt; &lt;/i:mtext&gt;&lt;i:mtext&gt; &lt;/i:mtext&gt;&lt;i:mi&gt;TeV&lt;/i:mi&gt;&lt;/i:math&gt; (6 TeV) for &lt;k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;k:msub&gt;&lt;k:mi&gt;g&lt;/k:mi&gt;&lt;k:mrow&gt;&lt;k:mi&gt;B&lt;/k:mi&gt;&lt;k:mo&gt;−&lt;/k:mo&gt;&lt;k:mi&gt;L&lt;/k:mi&gt;&lt;/k:mrow&gt;&lt;/k:msub&gt;&lt;k:mo&gt;=&lt;/k:mo&gt;&lt;k:mn&gt;0.1&lt;/k:mn&gt;&lt;/k:math&gt; (&lt;m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;m:msub&gt;&lt;m:mi&gt;g&lt;/m:mi&gt;&lt;m:mrow&gt;&lt;m:mi&gt;B&lt;/m:mi&gt;&lt;m:mo&gt;−&lt;/m:mo&gt;&lt;m:mi&gt;L&lt;/m:mi&gt;&lt;/m:mrow&gt;&lt;/m:msub&gt;&lt;m:mo&gt;=&lt;/m:mo&gt;&lt;m:mn&gt;0.5&lt;/m:mn&gt;&lt;/m:math&gt;) in the absence of invisible decays. Once invisible decays are turned on, these limits are substantially relaxed. Assuming an invisible branching ratio of &lt;o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;o:msub&gt;&lt;o:mi&gt;BR&lt;/o:mi&gt;&lt;o:mi&gt;inv&lt;/o:mi&gt;&lt;/o:msub&gt;&lt;o:mo&gt;=&lt;/o:mo&gt;&lt;o:mn&gt;0.9&lt;/o:mn&gt;&lt;/o:math&gt;, the LHC bound is loosened up to &lt;q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;q:msub&gt;&lt;q:mi&gt;M&lt;/q:mi&gt;&lt;q:msup&gt;&lt;q:mi&gt;Z&lt;/q:mi&gt;&lt;q:mo&gt;′&lt;/q:mo&gt;&lt;/q:msup&gt;&lt;/q:msub&gt;&lt;q:mo&gt;&gt;&lt;/q:mo&gt;&lt;q:mn&gt;4.8&lt;/q:mn&gt;&lt;q:mtext&gt; &lt;/q:mtext&gt;&lt;q:mtext&gt; &lt;/q:mtext&gt;&lt;q:mi&gt;TeV&lt;/q:mi&gt;&lt;/q:math&gt; for &lt;s:math xmlns:s=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;s:msub&gt;&lt;s:mi&gt;g&lt;/s:mi&gt;&lt;s:mrow&gt;&lt;s:mi&gt;B&lt;/s:mi&gt;&lt;s:mo&gt;−&lt;/s:mo&gt;&lt;s:mi&gt;L&lt;/s:mi&gt;&lt;/s:mrow&gt;&lt;/s:msub&gt;&lt;s:mo&gt;=&lt;/s:mo&gt;&lt;s:mn&gt;0.5&lt;/s:mn&gt;&lt;/s:math&gt;. This analysis confirms that the LHC is able to impose stricter constraints than the bounds established by experiments at LEP. We also estimate the projected High-Luminosity LHC bounds at &lt;u:math xmlns:u=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;u:msqrt&gt;&lt;u:mi&gt;s&lt;/u:mi&gt;&lt;/u:msqrt&gt;&lt;u:mo&gt;=&lt;/u:mo&gt;&lt;u:mn&gt;14&lt;/u:mn&gt;&lt;u:mtext&gt; &lt;/u:mtext&gt;&lt;u:mtext&gt; &lt;/u:mtext&gt;&lt;u:mi&gt;TeV&lt;/u:mi&gt;&lt;/u:math&gt; and a planned integrated luminosity of &lt;w:math xmlns:w=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;w:mi mathvariant=\"script\"&gt;L&lt;/w:mi&gt;&lt;w:mo&gt;=&lt;/w:mo&gt;&lt;w:mn&gt;3&lt;/w:mn&gt;&lt;w:mtext&gt; &lt;/w:mtext&gt;&lt;w:mtext&gt; &lt;/w:mtext&gt;&lt;w:mrow&gt;&lt;w:msup&gt;&lt;w:mrow&gt;&lt;w:mi&gt;ab&lt;/w:mi&gt;&lt;/w:mrow&gt;&lt;w:mrow&gt;&lt;w:mo&gt;−&lt;/w:mo&gt;&lt;w:mn&gt;1&lt;/w:mn&gt;&lt;/w:mrow&gt;&lt;/w:msup&gt;&lt;/w:mrow&gt;&lt;/w:math&gt; that will probe &lt;z:math xm","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"9 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066837","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}

{"title":"Critical dynamics of model H within the real-time FRG approach","authors":"Yong-rui Chen, Yang-yang Tan, Wei-jie Fu","doi":"10.1103/physrevd.111.094025","DOIUrl":"https://doi.org/10.1103/physrevd.111.094025","url":null,"abstract":"The critical dynamics of model H</a:mi></a:math> with a conserved order parameter coupled to a transverse momentum density which describes the gas-liquid or binary-fluid transitions is investigated within the functional renormalization group approach formulated on the closed time path. According to the dynamic scaling analysis, model <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mi>H</c:mi></c:math> and quantum chromodynamics (QCD) critical end point belong to the same dynamic universality class in the critical region. The higher-order correction of the transport coefficient <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mover accent=\"true\"><e:mi>λ</e:mi><e:mo stretchy=\"false\">¯</e:mo></e:mover></e:math> and shear viscosity <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:mover accent=\"true\"><i:mi>η</i:mi><i:mo stretchy=\"false\">¯</i:mo></i:mover></i:math> arising from mode-couplings are obtained by calculating the two-point correlation functions. The flow equation of a dimensionless coupling constant for nondissipative interactions is derived to look for the fixed-point solution of the system. The scaling relation between the critical exponent of the transport coefficient and that of the shear viscosity is estimated. Finally, the dynamic critical exponent <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><m:mi>z</m:mi></m:math> is obtained as a function of the spatial dimension <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mi>d</o:mi></o:math>. <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":"35 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066903","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}

{"title":"Superexponential primordial black hole production via delayed vacuum decay","authors":"Yanda Wu, Stefano Profumo","doi":"10.1103/physrevd.111.103524","DOIUrl":"https://doi.org/10.1103/physrevd.111.103524","url":null,"abstract":"If a cosmological first-order phase transition occurs sufficiently slowly, delayed vacuum decay may lead to the formation of primordial black holes. Here we consider a simple model as a case study of how the abundance of the produced black holes depends on the model’s input parameters. We demonstrate, using both numerical and analytical arguments and methods, that the black hole abundance is controlled by a double, “super”-exponential dependence on the three-dimensional Euclidean action over temperature at its minimal value. We show that a modified expansion rate during the phase transition, such as one driven by an additional energy density component, leads to a weaker dependence on the underlying model parameters, but maintains the same superexponential structure. We argue that our findings generalize to any framework of black hole production via delayed vacuum decay. <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":"21 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066839","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}

{"title":"Critical unstable qubits: An application to the B0B¯0 meson system","authors":"Dimitrios Karamitros, Thomas McKelvey, Apostolos Pilaftsis","doi":"10.1103/physrevd.111.096020","DOIUrl":"https://doi.org/10.1103/physrevd.111.096020","url":null,"abstract":"We extend our previous work on a novel class of unstable qubits which we have identified recently and called them critical unstable qubits (CUQs). The characteristic property of CUQs is that the energy-level and decay-width vectors, E</a:mi></a:math> and <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><d:mi mathvariant=\"bold\">Γ</d:mi></d:math>, are orthogonal to one another, and the key parameter <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:mrow><g:mi>r</g:mi><g:mo>=</g:mo><g:mo stretchy=\"false\">|</g:mo><g:mi mathvariant=\"bold\">Γ</g:mi><g:mo stretchy=\"false\">|</g:mo><g:mo>/</g:mo><g:mo stretchy=\"false\">|</g:mo><g:mn>2</g:mn><g:mi mathvariant=\"bold\">E</g:mi><g:mo stretchy=\"false\">|</g:mo></g:mrow></g:math> is less than 1. Most remarkably, CUQs exhibit two atypical behaviors: (i) they display coherence-decoherence oscillations in a co-decaying frame of the system described by a unit Bloch vector <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mi mathvariant=\"bold\">b</o:mi></o:math>, and (ii) the unit Bloch vector <r:math xmlns:r=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><r:mi mathvariant=\"bold\">b</r:mi></r:math> describing a pure CUQ sweeps out unequal areas during equal intervals of time, while rotating about the vector <u:math xmlns:u=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><u:mi mathvariant=\"bold\">E</u:mi></u:math>. The latter phenomenon emerges beyond the usual oscillatory pattern due to the energy-level difference of the two-level quantum system, which governs an ordinary qubit. By making use of a Fourier series decomposition, we define anharmonicity observables that quantify the degree of oscillation of a CUQ. We apply the results of our formalism to the <x:math xmlns:x=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><x:msup><x:mi>B</x:mi><x:mn>0</x:mn></x:msup><x:msup><x:mover accent=\"true\"><x:mi>B</x:mi><x:mo stretchy=\"false\">¯</x:mo></x:mover><x:mn>0</x:mn></x:msup></x:math>-meson system and derive, for the first time, generic upper limits on these new observables. <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":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066842","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}

{"title":"Single spin asymmetry in forward pA collisions from the Pomeron-odderon interference","authors":"Sanjin Benić, Eric Andreas Vivoda","doi":"10.1103/physrevd.111.094027","DOIUrl":"https://doi.org/10.1103/physrevd.111.094027","url":null,"abstract":"Working in the hybrid framework of the high energy p</a:mi>A</a:mi></a:math> collisions we identify a new contribution to transverse single spin asymmetry (SSA). The phase necessary for the SSA is provided by the Pomeron-odderon interference in the dense nuclear target. The complete formula for the <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mi>p</c:mi><c:mi>A</c:mi><c:mo stretchy=\"false\">→</c:mo><c:mi>h</c:mi><c:mi>X</c:mi></c:math> polarized cross section also contains the transversity distribution for the polarized projectile as well as the real part of the twist-three fragmentation function. We numerically estimate the asymmetry <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><f:msub><f:mi>A</f:mi><f:mi>N</f:mi></f:msub></f:math> and its nuclear dependence. Based on a model computation we find that <h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><h:msub><h:mi>A</h:mi><h:mi>N</h:mi></h:msub></h:math> can be a percent level in the forward and low-<j:math xmlns:j=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><j:msub><j:mi>P</j:mi><j:mrow><j:mi>h</j:mi><j:mo>⊥</j:mo></j:mrow></j:msub></j:math> region. For large nuclei we find significant suppression, with <l:math xmlns:l=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><l:msub><l:mi>A</l:mi><l:mi>N</l:mi></l:msub><l:mo>∝</l:mo><l:msup><l:mi>A</l:mi><l:mrow><l:mo>−</l:mo><l:mn>7</l:mn><l:mo>/</l:mo><l:mn>6</l:mn></l:mrow></l:msup></l:math> parametrically. As a notable feature we find a node of <n:math xmlns:n=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><n:msub><n:mi>A</n:mi><n:mi>N</n:mi></n:msub></n:math> as a function of the <p:math xmlns:p=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><p:msub><p:mi>P</p:mi><p:mrow><p:mi>h</p:mi><p:mo>⊥</p:mo></p:mrow></p:msub></p:math> around the values of the initial saturation scale that could be used to test this mechanism experimentally. <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":"10 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066901","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}

{"title":"Rho-meson screening mass in the presence of strong magnetic fields","authors":"L. A. Hernández, Juan D. Martínez-Sánchez, R. Zamora","doi":"10.1103/physrevd.111.096019","DOIUrl":"https://doi.org/10.1103/physrevd.111.096019","url":null,"abstract":"We study the screening mass of the neutral rho-meson in the presence of strong magnetic fields using the Kroll-Lee-Zumino (KLZ) model. The rho-meson self-energy is computed at one-loop order within the lowest Landau level (LLL) approximation, considering the magnetic field as the dominant energy scale. Due to Lorentz symmetry breaking induced by the external field, we decompose the self-energy into three independent tensor structures, which give rise to three distinct modes. Additionally, the four-momentum splits into parallel and perpendicular components, leading to two types of screening masses: the parallel screening mass (p</a:mi>0</a:mn></a:msub>=</a:mo>0</a:mn></a:math> and <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:msub><c:mi>p</c:mi><c:mo>⊥</c:mo></c:msub><c:mo stretchy=\"false\">→</c:mo><c:mn>0</c:mn></c:math>) and the perpendicular screening mass (<f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><f:msub><f:mi>p</f:mi><f:mn>0</f:mn></f:msub><f:mo>=</f:mo><f:mn>0</f:mn></f:math> and <h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><h:msub><h:mi>p</h:mi><h:mo stretchy=\"false\">∥</h:mo></h:msub><h:mo stretchy=\"false\">→</h:mo><h:mn>0</h:mn></h:math>). Our results show that the zero and perpendicular modes exhibit a monotonically increasing behavior with the magnetic field strength, whereas the parallel mode remains essentially constant. These findings provide new insights into the behavior of vector mesons in strongly magnetized media, with implications for QCD under extreme conditions. <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":"20 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066694","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}