Physical Review DPub Date : 2025-03-28DOI: 10.1103/physrevd.111.066022
Abhishek Baruah, Prabwal Phukon
{"title":"CFT phase transition analysis of charged, rotating black holes in D=4 : A holographic thermodynamics approach","authors":"Abhishek Baruah, Prabwal Phukon","doi":"10.1103/physrevd.111.066022","DOIUrl":"https://doi.org/10.1103/physrevd.111.066022","url":null,"abstract":"We investigate the holographic thermodynamics of 4-D Kerr-Newman anti–de Sitter (AdS) black holes, focusing on the conformal thermal states that are dual to these black holes. We explore the thermodynamic behavior within specific ensembles characterized by fixed sets of variables: (</a:mo>Q</a:mi>,</a:mo>J</a:mi>,</a:mo>V</a:mi>,</a:mo>C</a:mi>)</a:mo></a:math>, <h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><h:mrow><h:mo stretchy=\"false\">(</h:mo><h:mi mathvariant=\"script\">Q</h:mi><h:mo>,</h:mo><h:mi mathvariant=\"normal\">Ω</h:mi><h:mo>,</h:mo><h:mi mathvariant=\"script\">V</h:mi><h:mo>,</h:mo><h:mi>C</h:mi><h:mo stretchy=\"false\">)</h:mo></h:mrow></h:math>, <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mrow><o:mo stretchy=\"false\">(</o:mo><o:mi>φ</o:mi><o:mo>,</o:mo><o:mi mathvariant=\"normal\">Ω</o:mi><o:mo>,</o:mo><o:mi mathvariant=\"script\">V</o:mi><o:mo>,</o:mo><o:mi>C</o:mi><o:mo stretchy=\"false\">)</o:mo></o:mrow></o:math>, <u:math xmlns:u=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><u:mrow><u:mo stretchy=\"false\">(</u:mo><u:mi>φ</u:mi><u:mo>,</u:mo><u:mi mathvariant=\"script\">J</u:mi><u:mo>,</u:mo><u:mi mathvariant=\"script\">V</u:mi><u:mo>,</u:mo><u:mi>C</u:mi><u:mo stretchy=\"false\">)</u:mo></u:mrow></u:math>, (</ab:mo>Q</ab:mi>,</ab:mo>Ω</ab:mi>,</ab:mo>p</ab:mi>,</ab:mo>C</ab:mi>)</ab:mo></ab:mrow></ab:math>, and <gb:math xmlns:gb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><gb:mo stretchy=\"false\">(</gb:mo><gb:mi>φ</gb:mi><gb:mo>,</gb:mo><gb:mi mathvariant=\"normal\">Ω</gb:mi><gb:mo>,</gb:mo><gb:mi>p</gb:mi><gb:mo>,</gb:mo><gb:mi>C</gb:mi><gb:mo stretchy=\"false\">)</gb:mo></gb:math>. Here, <lb:math xmlns:lb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><lb:mi>φ</lb:mi></lb:math>, <nb:math xmlns:nb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><nb:mi mathvariant=\"script\">Q</nb:mi></nb:math>, <qb:math xmlns:qb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><qb:mi mathvariant=\"normal\">Ω</qb:mi></qb:math>, <tb:math xmlns:tb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><tb:mi mathvariant=\"script\">J</tb:mi></tb:math>, <wb:math xmlns:wb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><wb:mi>p</wb:mi></wb:math>, <yb:math xmlns:yb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><yb:mi mathvariant=\"script\">V</yb:mi></yb:math>, and <bc:math xmlns:bc=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><bc:mi>C</bc:mi></bc:math> represent the electric potential, electric charge, angular velocity, angular momentum, conformal field theory (CFT) pressure, CFT volume, and central charge, respectively. The inclusion of both charge and momentum significantly enriches the regime of phase transitions, leading to a variety of phenomena including first-order van der Waals-type phase transitions, (de)confinement phase transitions, Davies-type phase transitions, and second-order superfluid <dc:math xmlns:dc=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"36 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734052","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}
Physical Review DPub Date : 2025-03-28DOI: 10.1103/physrevd.111.065024
Valentin Benedetti, Horacio Casini, Javier M. Magán
{"title":"Selection rules for RG flows of minimal models","authors":"Valentin Benedetti, Horacio Casini, Javier M. Magán","doi":"10.1103/physrevd.111.065024","DOIUrl":"https://doi.org/10.1103/physrevd.111.065024","url":null,"abstract":"Minimal d</a:mi>=</a:mo>2</a:mn></a:math> conformal field theories (CFTs) are usually classified through modular invariant partition functions. There is a finer classification of “noncomplete” models when <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mi>S</c:mi></c:math> duality is not imposed. We approach this classification by starting with the local chiral algebra and adding primaries sequentially. At each step, we only impose locality (T duality) and closure of the operator algebra. For each chiral algebra, this produces a treelike graph. Each tree node corresponds to a local <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mi>d</e:mi><e:mo>=</e:mo><e:mn>2</e:mn></e:math> CFT, with an intrinsic Jones index measuring the size of Haag duality violation. This index can be computed with the partition function and is related to the total quantum dimension of the category of superselection sectors of the node and to the relative size between the node and a modular invariant completion. In this way, we find in a very explicit manner a classification of local minimal (<g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:mi>c</g:mi><g:mo><</g:mo><g:mn>1</g:mn></g:math>) <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:mi>d</i:mi><i:mo>=</i:mo><i:mn>2</i:mn></i:math> CFTs. When appropriate, this matches Kawahigashi-Longo’s previous results. We use this finer classification to constrain renormalization group (RG) flows. For a relevant perturbation, the flow can be restricted to the subalgebra associated with it, typically corresponding to a nonmodular invariant node in the tree. The structure of the graph above such node needs to be preserved by the RG flow. In particular, the superselection sector category for the node must be preserved. This gives selection rules that recover in a unified fashion several known facts while unraveling new ones. <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":"23 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143733930","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}
Physical Review DPub Date : 2025-03-28DOI: 10.1103/physrevd.111.066021
Sam Leutheusser, Hong Liu
{"title":"Subregion-subalgebra duality: Emergence of space and time in holography","authors":"Sam Leutheusser, Hong Liu","doi":"10.1103/physrevd.111.066021","DOIUrl":"https://doi.org/10.1103/physrevd.111.066021","url":null,"abstract":"In holographic duality, a higher dimensional quantum gravity system emerges from a lower dimensional conformal field theory (CFT) with a large number of degrees of freedom. We propose a formulation of duality for a general causally complete bulk spacetime region, called subregion-subalgebra duality, which provides a framework to describe how geometric notions in the gravity system, such as spacetime subregions, different notions of times, and causal structure, emerge from the dual CFT. Subregion-subalgebra duality generalizes and brings new insights into subregion-subregion duality (or equivalently entanglement wedge reconstruction). It provides a mathematically precise definition of subregion-subregion duality and gives an independent definition of entanglement wedges without using entropy. Geometric properties of entanglement wedges, including those that play a crucial role in interpreting the bulk as a quantum error correcting code, can be understood from the duality as the geometrization of the superadditivity of certain algebras. Using general boundary subalgebras rather than those associated with geometric subregions makes it possible to find duals for general bulk spacetime regions, including those not touching the boundary. Applying subregion-subalgebra duality to a boundary state describing a single-sided black hole also provides a precise way to define mirror operators. <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":"18 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734055","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}
Physical Review DPub Date : 2025-03-28DOI: 10.1103/physrevd.111.063546
Md Riajul Haque, Debaprasad Maity, Rajesh Mondal
{"title":"Thermal and nonthermal dark matters with gravitational neutrino reheating","authors":"Md Riajul Haque, Debaprasad Maity, Rajesh Mondal","doi":"10.1103/physrevd.111.063546","DOIUrl":"https://doi.org/10.1103/physrevd.111.063546","url":null,"abstract":"We have discussed in detail how neutrinos produced from inflaton solely through gravitational interaction can successfully reheat the Universe. For this, we have introduced the well-known type-I seesaw neutrino model. Depending on seesaw model parameters, two distinct reheating histories have been realized and dubbed as (i) Neutrino dominating: Following the inflaton domination, the universe becomes neutrino dominated, and their subsequent decay concludes the reheating process, and (ii) Neutrino heating: Despite being subdominant compared to inflaton energy, neutrinos efficiently heat the thermal bath and produce the radiation dominated universe. Imposing baryon asymmetric yield, the Δ</a:mi>N</a:mi>eff</a:mi></a:msub></a:math> constraint at big bang nucleosynthesis (BBN) considering primordial gravitational waves (PGW), we have arrived at the following constraints on reheating equation of state to lie within <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><d:mn>0.5</d:mn><d:mo>≲</d:mo><d:msub><d:mi>w</d:mi><d:mi>ϕ</d:mi></d:msub><d:mo>≲</d:mo><d:mn>1.0</d:mn></d:math>. In these neutrino-driven reheating backgrounds, we further performed a detailed analysis of both thermal and nonthermal production of dark matter (DM), invoking two minimal models, namely the Higgs portal DM and classical quantum chromodynamics pseudoscalar axion. An interesting correlation between seemingly uncorrelated DM and type-I seesaw parameters has emerged when confronting various direct and indirect observations. When DMs are set to freeze-in, freeze-out, or oscillate during reheating, new parameter spaces open, which could be potentially detectable in future experiments, paving an indirect way to look into the early Universe in the laboratory. <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":"30 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734053","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}
Physical Review DPub Date : 2025-03-28DOI: 10.1103/physrevd.111.063549
Fiona McCarthy, J. Colin Hill, William R. Coulton, David W. Hogg
{"title":"Signal-preserving CMB component separation with machine learning","authors":"Fiona McCarthy, J. Colin Hill, William R. Coulton, David W. Hogg","doi":"10.1103/physrevd.111.063549","DOIUrl":"https://doi.org/10.1103/physrevd.111.063549","url":null,"abstract":"Analysis of microwave sky signals, such as the cosmic microwave background, often requires component separation using multifrequency methods, whereby different signals are isolated according to their different frequency behaviors. Many so-called blind methods, such as the internal linear combination (ILC), make minimal assumptions about the spatial distribution of the signal or contaminants, and only assume knowledge of the frequency dependence of the signal. The ILC produces a minimum-variance linear combination of the measured frequency maps. In the case of Gaussian, statistically isotropic fields, this is the optimal linear combination, as the variance is the only statistic of interest. However, in many cases the signal we wish to isolate, or the foregrounds we wish to remove, are non-Gaussian and/or statistically anisotropic (in particular for the case of Galactic foregrounds). In such cases, it is possible that machine learning (ML) techniques can be used to exploit the non-Gaussian features of the foregrounds and thereby improve component separation. However, many ML techniques require the use of complex, difficult-to-interpret operations on the data. We propose a hybrid method whereby we train an ML model using only combinations of the data that , and combine the resulting ML-predicted foreground estimate with the ILC solution to reduce the error from the ILC. We demonstrate our methods on simulations of extragalactic temperature and Galactic polarization foregrounds and show that our ML model can exploit non-Gaussian features, such as point sources and spatially varying spectral indices, to produce lower-variance maps than ILC—e.g., reducing the variance of the B-mode residual by factors of up to 5—while preserving the signal of interest in an unbiased manner. Moreover, we often find improved performance even when applying our ML technique to foreground models on which it was not trained. <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":"66 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734056","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}
Physical Review DPub Date : 2025-03-28DOI: 10.1103/physrevd.111.066019
Bhaskar Shukla, Owais Riyaz, Subhash Mahapatra
{"title":"Classical and quantum chaos of closed strings on a charged confining holographic background","authors":"Bhaskar Shukla, Owais Riyaz, Subhash Mahapatra","doi":"10.1103/physrevd.111.066019","DOIUrl":"https://doi.org/10.1103/physrevd.111.066019","url":null,"abstract":"We discuss the classical and quantum chaos of closed strings on a recently constructed charged confining holographic background. The confining background corresponds to the charged soliton, which is a solution of minimal d</a:mi>=</a:mo>5</a:mn></a:math> gauged supergravity. The solution has a compact spacelike direction with a Wilson line on a circle and asymptotes to <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:msub><c:mi>AdS</c:mi><c:mn>5</c:mn></c:msub></c:math> with a planar boundary. For the classical case, we analyze the chaos using the power spectrum, Poincaré sections, and Lyapunov exponents, finding that both energy and charge play constructive effects on enhancing the chaotic nature of the system. We similarly analyze quantum chaos using the distribution of the spectrum’s level-spacing and out-of-time-ordered correlators and thoroughly investigate the effects of charge and energy. A gradual transition from a chaotic to an integrable regime is obtained as the energy and charge increase from lower to higher values, with charge playing a subdominant role. <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":"48 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734050","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}
Physical Review DPub Date : 2025-03-27DOI: 10.1103/physrevd.111.055032
M. Demirci, M. F. Mustamin
{"title":"Probing light mediators with recent PandaX-4T low-energy electron recoil data","authors":"M. Demirci, M. F. Mustamin","doi":"10.1103/physrevd.111.055032","DOIUrl":"https://doi.org/10.1103/physrevd.111.055032","url":null,"abstract":"Neutrinos elastically scattered off atomic electrons offer a unique opportunity to probe the Standard Model (SM) and beyond SM physics. In this work, we examine the new physics effects of light mediators through elastic neutrino-electron scattering using solar neutrinos at the low energy range of PandaX-4T. These mediators, with a mass less than 1 GeV, are common properties of extensions to the SM. Accordingly, we consider universal light mediator models involving scalar, vector, and tensor interactions allowed by Lorentz invariance, and the anomaly-free U</a:mi>(</a:mo>1</a:mn>)</a:mo></a:mrow>′</a:mo></a:mrow></a:msup></a:mrow></a:math> extensions of the SM with a new vector mediator such as the <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:msub><e:mi>L</e:mi><e:mi>e</e:mi></e:msub><e:mo>−</e:mo><e:msub><e:mi>L</e:mi><e:mi>μ</e:mi></e:msub></e:math>, <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:msub><g:mi>L</g:mi><g:mi>e</g:mi></g:msub><g:mo>−</g:mo><g:msub><g:mi>L</g:mi><g:mi>τ</g:mi></g:msub></g:math> and <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:msub><i:mi>L</i:mi><i:mi>μ</i:mi></i:msub><i:mo>−</i:mo><i:msub><i:mi>L</i:mi><i:mi>τ</i:mi></i:msub></i:math> gauge models in which the charges are exclusively leptonic. The new physics effects are analyzed by embedding each model into the SM process using solar neutrino flux. We obtain novel constraints on the coupling-mass plane of these models from the latest Run0 and Run1 datasets of the PandaX-4T experiment. We also compare our results with other limits derived from various terrestrial and astrophysical experiments. Our analysis results reveal more stringent limits in some regions of parameter space. <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":"72 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723233","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}
Physical Review DPub Date : 2025-03-27DOI: 10.1103/physrevd.111.055031
Yue-Hui Yao, Tingyuan Jiang, Yong Tang
{"title":"Prospects for axion dark matter searches at LISA-like interferometers","authors":"Yue-Hui Yao, Tingyuan Jiang, Yong Tang","doi":"10.1103/physrevd.111.055031","DOIUrl":"https://doi.org/10.1103/physrevd.111.055031","url":null,"abstract":"Axion or axionlike particles are one of the leading candidates for dark matter. Because of its tiny coupling with photons, axion dark matter in the background can induce distinct phase velocities for light with different parity, an effect known as birefringence. Here, we propose a modification to the polarization state of the interspacecraft laser link in Laser Interferometer Space Antenna (LISA)-like interferometers to make them sensitive to this birefringence effect. We discuss the prospects of using the Sagnac combinations to search for axion dark matter and derive the corresponding sensitivity. With this setup, we show that next-generation laser interferometers in space would have promising sensitivities on the axion-photon coupling with axion mass around 10</a:mn></a:mrow>−</a:mo>19</a:mn></a:mrow></a:msup>−</a:mo>10</a:mn></a:mrow>−</a:mo>14</a:mn></a:mrow></a:msup></a:mtext></a:mtext>eV</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":"11 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723251","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}
Physical Review DPub Date : 2025-03-27DOI: 10.1103/physrevd.111.055029
Shu-Yu Ho, Jongkuk Kim, Pyungwon Ko
{"title":"Recent B+→K+νν¯ excess and muon g−2 illuminating light dark sector with Higgs portal","authors":"Shu-Yu Ho, Jongkuk Kim, Pyungwon Ko","doi":"10.1103/physrevd.111.055029","DOIUrl":"https://doi.org/10.1103/physrevd.111.055029","url":null,"abstract":"The Belle II collaboration recently announced that they observed the B</a:mi>+</a:mo></a:msup>→</a:mo>K</a:mi>+</a:mo></a:msup>ν</a:mi>ν</a:mi>¯</a:mo></a:mover></a:math> decay process for the first time. However, their result encounters a <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><f:mrow><f:mn>2.7</f:mn><f:mi>σ</f:mi></f:mrow></f:math> deviation from the Standard Model (SM) calculation. Additionally, Fermilab released new data on muon <h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><h:mi>g</h:mi><h:mo>−</h:mo><h:mn>2</h:mn></h:math> away from the SM expectation with <j:math xmlns:j=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><j:mn>5.1</j:mn><j:mi>σ</j:mi></j:math>. In this paper, we study the simplest UV-complete <l:math xmlns:l=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><l:mrow><l:mi mathvariant=\"normal\">U</l:mi><l:mo stretchy=\"false\">(</l:mo><l:mn>1</l:mn><l:msub><l:mrow><l:mo stretchy=\"false\">)</l:mo></l:mrow><l:mrow><l:msub><l:mrow><l:mi mathvariant=\"sans-serif\">L</l:mi></l:mrow><l:mrow><l:mi>μ</l:mi></l:mrow></l:msub><l:mo>−</l:mo><l:msub><l:mrow><l:mi mathvariant=\"sans-serif\">L</l:mi></l:mrow><l:mrow><l:mi>τ</l:mi></l:mrow></l:msub></l:mrow></l:msub></l:mrow></l:math>-charged complex scalar dark matter (DM) model. Thanks to the existence of light dark Higgs boson and light dark photon, we can explain the observed relic density of DM and resolve the results reported by both Belle II and Fermilab experiments simultaneously. As a by-product, the Hubble tension can be alleviated by taking <s:math xmlns:s=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><s:mrow><s:mi mathvariant=\"normal\">Δ</s:mi><s:msub><s:mrow><s:mi>N</s:mi></s:mrow><s:mrow><s:mi mathvariant=\"sans-serif\">eff</s:mi></s:mrow></s:msub><s:mo>≃</s:mo><s:mn>0.3</s:mn></s:mrow></s:math> induced by the light dark photon, which could be tested by CMB stage-4 and new NA64 experimental data in the near future. In addition, our light DM mass is highly testified by future data released by Belle II and CMB stage-4. <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":"121 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723235","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}
Physical Review DPub Date : 2025-03-27DOI: 10.1103/physrevd.111.053010
Maximilian Ruhdorfer, Ennio Salvioni, Andrea Wulzer
{"title":"Building the case for forward muon detection at a muon collider","authors":"Maximilian Ruhdorfer, Ennio Salvioni, Andrea Wulzer","doi":"10.1103/physrevd.111.053010","DOIUrl":"https://doi.org/10.1103/physrevd.111.053010","url":null,"abstract":"We survey the opportunities offered by the detection of the forward muons that accompany the creation of neutral effective vector bosons at a muon collider, in different kinematic regimes. Vectors with relatively low energy produce the Higgs boson and the extended muon angular coverage enables studies of the Higgs properties, such as the measurement of the inclusive production cross section and the branching ratio to invisible final states. New heavy particles could be produced by vectors of higher energy, through Higgs portal interactions. If the new particles are invisible, the detection of the forward muons is essential in order to search for this scenario. The angular correlations of the forward muons are sensitive to the quantum interference between the vector-boson helicity amplitudes and can be exploited for the characterization of vector-boson scattering and fusion processes. This is illustrated by analyzing the C</a:mi>P</a:mi></a:math> properties of the Higgs coupling to the <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mi>Z</c:mi></c:math> boson. Our findings provide a physics case and a set of benchmarks for the design of a dedicated forward muon detector. <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":"61 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723234","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}