Physical Review D最新文献

{"title":"Schwinger particle production: Rapid switch off of the external field versus dynamical assistance","authors":"I. A. Aleksandrov, D. G. Sevostyanov, V. M. Shabaev","doi":"10.1103/physrevd.111.016010","DOIUrl":"https://doi.org/10.1103/physrevd.111.016010","url":null,"abstract":"We consider the process of electron-positron pair production in the presence of strong electric backgrounds being rapidly switched on and off and examine the total particle yield. For sufficiently sharp field profiles, the particle number can be substantially enhanced. It is demonstrated that this enhancement is quite similar to the phenomenon of dynamical assistance by a weak high-frequency field superimposed on a strong background. Both these mechanisms are analyzed by means of exact numerical computations, worldline instanton approach, and the locally constant field approximation. We identify the timescale of the switching profile leading to the pair-production enhancement and argue that the particle yield is highly unlikely to be increased by shaping the switch on and off of realistic laser pulses. On the other hand, we confirm that it is feasible to observe the dynamically assisted Schwinger effect by adding a rapidly oscillating field to a strong electric background. <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":"3 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940171","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":"Relevance of the coupled channels in the ϕp and ρ0p correlation functions","authors":"A. Feijoo, M. Korwieser, L. Fabbietti","doi":"10.1103/physrevd.111.014009","DOIUrl":"https://doi.org/10.1103/physrevd.111.014009","url":null,"abstract":"The vector meson-baryon interaction in a coupled channel scheme is revisited within the correlation function framework. As illustrative cases to reveal the important role played by the coupled channels, we focus on the ϕ</a:mi>p</a:mi></a:mrow></a:math> and <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><d:mrow><d:msup><d:mrow><d:mi>ρ</d:mi></d:mrow><d:mrow><d:mn>0</d:mn></d:mrow></d:msup><d:mi mathvariant=\"normal\">p</d:mi></d:mrow></d:math> systems given their complex dynamics and the presence of quasibound states or resonances in the vicinity of their thresholds. We show that the <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:mrow><g:mi>ϕ</g:mi><g:mi mathvariant=\"normal\">p</g:mi></g:mrow></g:math> femtoscopic data provide novel information about a <j:math xmlns:j=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><j:msup><j:mi>N</j:mi><j:mo>*</j:mo></j:msup></j:math> state present in the experimental region and anticipate the relevance of a future <l:math xmlns:l=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><l:mrow><l:msup><l:mrow><l:mi>ρ</l:mi></l:mrow><l:mrow><l:mn>0</l:mn></l:mrow></l:msup><l:mi mathvariant=\"normal\">p</l:mi></l:mrow></l:math> correlation function measurement in order to pin down the <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mi>S</o:mi><o:mo>=</o:mo><o:mn>0</o:mn><o:mo>,</o:mo><o:mi>Q</o:mi><o:mo>=</o:mo><o:mo>+</o:mo><o:mn>1</o:mn></o:math> vector meson-baryon interaction as well as to disclose the characterizing features of the <q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><q:msup><q:mi>N</q:mi><q:mo>*</q:mo></q:msup><q:mo stretchy=\"false\">(</q:mo><q:mn>1700</q:mn><q:mo stretchy=\"false\">)</q:mo></q:math> state. <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":"3 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961206","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":"Σ+→pℓ+ℓ− decays within the standard model and beyond","authors":"Arnab Roy, Jusak Tandean, German Valencia","doi":"10.1103/physrevd.111.013003","DOIUrl":"https://doi.org/10.1103/physrevd.111.013003","url":null,"abstract":"Motivated by the LHCb measurement of the hyperon decay mode Σ</a:mi></a:mrow>+</a:mo></a:mrow></a:msup>→</a:mo>p</a:mi>μ</a:mi></a:mrow>+</a:mo></a:mrow></a:msup>μ</a:mi></a:mrow>−</a:mo></a:mrow></a:msup></a:mrow></a:math> and prospects for improvement, we revisit the estimates for the rate and muon forward-backward asymmetry within the standard model and beyond. The standard model prediction has a fourfold ambiguity, and we suggest ways to resolve it with other measurements, including possible studies of <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:msup><e:mi mathvariant=\"normal\">Σ</e:mi><e:mo>+</e:mo></e:msup><e:mo stretchy=\"false\">→</e:mo><e:mi>p</e:mi><e:msup><e:mi>e</e:mi><e:mo>+</e:mo></e:msup><e:msup><e:mi>e</e:mi><e:mo>−</e:mo></e:msup></e:math> in the BESIII and LHCb experiments. We use the recent BESIII measurements of <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:msup><i:mi mathvariant=\"normal\">Σ</i:mi><i:mo>+</i:mo></i:msup><i:mo stretchy=\"false\">→</i:mo><i:mi>p</i:mi><i:mi>γ</i:mi></i:math> and <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><m:msup><m:mi mathvariant=\"normal\">Σ</m:mi><m:mo>+</m:mo></m:msup><m:mo stretchy=\"false\">→</m:mo><m:mi>N</m:mi><m:mi>π</m:mi></m:math> to reduce the uncertainty in the long-distance contribution to <q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><q:msup><q:mi mathvariant=\"normal\">Σ</q:mi><q:mo>+</q:mo></q:msup><q:mo stretchy=\"false\">→</q:mo><q:mi>p</q:mi><q:msup><q:mi>μ</q:mi><q:mo>+</q:mo></q:msup><q:msup><q:mi>μ</q:mi><q:mo>−</q:mo></q:msup></q:math>. Beyond the standard model, we consider a general effective Hamiltonian at low energy with ten operators whose Wilson coefficients parametrize the new physics. We derive expressions for the <u:math xmlns:u=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><u:msup><u:mi mathvariant=\"normal\">Σ</u:mi><u:mo>+</u:mo></u:msup><u:mo stretchy=\"false\">→</u:mo><u:mi>p</u:mi><u:msup><u:mi>μ</u:mi><u:mo>+</u:mo></u:msup><u:msup><u:mi>μ</u:mi><u:mo>−</u:mo></u:msup></u:math> rate and the associated muon forward-backward asymmetry in terms of these coefficients. Finally, we present the constraints on these Wilson coefficients that result from both kaon and hyperon decays and emphasize their complementarity. <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":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961208","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":"Weak interaction axial form factors of the octet baryons in nuclear medium","authors":"G. Ramalho, K. Tsushima, Myung-Ki Cheoun","doi":"10.1103/physrevd.111.013002","DOIUrl":"https://doi.org/10.1103/physrevd.111.013002","url":null,"abstract":"We study the axial-vector and the induced pseudoscalar form factors associated with the weak transitions between the octet baryon members in nuclear medium, using a covariant constituent quark model. We extend previous calculations of the axial transition form factors from the vacuum (free space) to the nuclear medium (symmetric nuclear matter). The extension of the model to the nuclear medium takes into account the modifications of the properties of hadrons in the medium (masses and coupling constants), as determined by the quark-meson coupling model. The axial-vector (G</a:mi>A</a:mi></a:msub></a:math>) and the induced pseudoscalar (<c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mrow><c:msub><c:mrow><c:mi>G</c:mi></c:mrow><c:mrow><c:mi>P</c:mi></c:mrow></c:msub></c:mrow></c:math>) form factors are evaluated for different values of the nuclear density <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mi>ρ</e:mi></e:math> in terms of the square transfer momentum <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:msup><g:mi>q</g:mi><g:mn>2</g:mn></g:msup><g:mo>=</g:mo><g:mo>−</g:mo><g:msup><g:mi>Q</g:mi><g:mn>2</g:mn></g:msup></g:math>. We conclude that, in general, the <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:msub><i:mi>G</i:mi><i:mi>A</i:mi></i:msub></i:math> and <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:msub><k:mi>G</k:mi><k:mi>P</k:mi></k:msub></k:math> form factors are reduced in the nuclear medium. The reduction is stronger for light baryons and high densities. The medium modifications are milder for the heavier octet baryons, particularly at large <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><m:msup><m:mi>Q</m:mi><m:mn>2</m:mn></m:msup></m:math>. The calculations presented here can be used to estimate the cross sections of neutrino and antineutrino scattering with nucleus, and neutrino and antineutrino scattering with hyperons bound to a nucleus, as well as those in the cores of compact stars. <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":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961281","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":"Production of single doubly charged Higgs bosons at muon colliders","authors":"Jie-Cheng Jia, Zhi-Long Han, Fei Huang, Yi Jin, Honglei Li","doi":"10.1103/physrevd.111.015009","DOIUrl":"https://doi.org/10.1103/physrevd.111.015009","url":null,"abstract":"In this paper, we study the single production of doubly charged Higgs H&lt;/a:mi&gt;&lt;/a:mrow&gt;±&lt;/a:mo&gt;±&lt;/a:mo&gt;&lt;/a:mrow&gt;&lt;/a:msup&gt;&lt;/a:mrow&gt;&lt;/a:math&gt; in the type-II seesaw at the high energy muon collider. Compared with the pair production channel &lt;c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;c:msup&gt;&lt;c:mi&gt;μ&lt;/c:mi&gt;&lt;c:mo&gt;+&lt;/c:mo&gt;&lt;/c:msup&gt;&lt;c:msup&gt;&lt;c:mi&gt;μ&lt;/c:mi&gt;&lt;c:mo&gt;−&lt;/c:mo&gt;&lt;/c:msup&gt;&lt;c:mo stretchy=\"false\"&gt;→&lt;/c:mo&gt;&lt;c:msup&gt;&lt;c:mi&gt;H&lt;/c:mi&gt;&lt;c:mrow&gt;&lt;c:mo&gt;+&lt;/c:mo&gt;&lt;c:mo&gt;+&lt;/c:mo&gt;&lt;/c:mrow&gt;&lt;/c:msup&gt;&lt;c:msup&gt;&lt;c:mi&gt;H&lt;/c:mi&gt;&lt;c:mrow&gt;&lt;c:mo&gt;−&lt;/c:mo&gt;&lt;c:mo&gt;−&lt;/c:mo&gt;&lt;/c:mrow&gt;&lt;/c:msup&gt;&lt;/c:math&gt;, the single production channel &lt;f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;f:msup&gt;&lt;f:mi&gt;μ&lt;/f:mi&gt;&lt;f:mo&gt;+&lt;/f:mo&gt;&lt;/f:msup&gt;&lt;f:msup&gt;&lt;f:mi&gt;μ&lt;/f:mi&gt;&lt;f:mo&gt;−&lt;/f:mo&gt;&lt;/f:msup&gt;&lt;f:mo stretchy=\"false\"&gt;→&lt;/f:mo&gt;&lt;f:msup&gt;&lt;f:mi&gt;μ&lt;/f:mi&gt;&lt;f:mo&gt;∓&lt;/f:mo&gt;&lt;/f:msup&gt;&lt;f:msup&gt;&lt;f:mo&gt;ℓ&lt;/f:mo&gt;&lt;f:mo&gt;∓&lt;/f:mo&gt;&lt;/f:msup&gt;&lt;f:msup&gt;&lt;f:mi&gt;H&lt;/f:mi&gt;&lt;f:mrow&gt;&lt;f:mo&gt;±&lt;/f:mo&gt;&lt;f:mo&gt;±&lt;/f:mo&gt;&lt;/f:mrow&gt;&lt;/f:msup&gt;&lt;/f:math&gt; in principle could probe the mass region above the threshold &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;H&lt;/i:mi&gt;&lt;i:mrow&gt;&lt;i:mo&gt;±&lt;/i:mo&gt;&lt;i:mo&gt;±&lt;/i:mo&gt;&lt;/i:mrow&gt;&lt;/i:msup&gt;&lt;/i:msub&gt;&lt;i:mo&gt;&gt;&lt;/i:mo&gt;&lt;i:msqrt&gt;&lt;i:mi&gt;s&lt;/i:mi&gt;&lt;/i:msqrt&gt;&lt;i:mo&gt;/&lt;/i:mo&gt;&lt;i:mn&gt;2&lt;/i:mn&gt;&lt;/i:math&gt;. The single production channel depends on the Yukawa coupling &lt;k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;k:mi&gt;h&lt;/k:mi&gt;&lt;/k:math&gt;, which is related to the neutrino oscillation parameters. We show that the Majorana phases &lt;m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;m:msub&gt;&lt;m:mi&gt;ϕ&lt;/m:mi&gt;&lt;m:mn&gt;1&lt;/m:mn&gt;&lt;/m:msub&gt;&lt;/m:math&gt; and &lt;o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;o:msub&gt;&lt;o:mi&gt;ϕ&lt;/o:mi&gt;&lt;o:mn&gt;2&lt;/o:mn&gt;&lt;/o:msub&gt;&lt;/o:math&gt; have great impact on the individual cross section of the single production. We find that the same sign dilepton signature from &lt;q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;q:msup&gt;&lt;q:mi&gt;H&lt;/q:mi&gt;&lt;q:mrow&gt;&lt;q:mo&gt;±&lt;/q:mo&gt;&lt;q:mo&gt;±&lt;/q:mo&gt;&lt;/q:mrow&gt;&lt;/q:msup&gt;&lt;q:mo stretchy=\"false\"&gt;→&lt;/q:mo&gt;&lt;q:msup&gt;&lt;q:mo&gt;ℓ&lt;/q:mo&gt;&lt;q:mo&gt;±&lt;/q:mo&gt;&lt;/q:msup&gt;&lt;q:msup&gt;&lt;q:mo&gt;ℓ&lt;/q:mo&gt;&lt;q:mo&gt;±&lt;/q:mo&gt;&lt;/q:msup&gt;&lt;/q:math&gt; could probe &lt;t:math xmlns:t=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;t:msub&gt;&lt;t:mi&gt;m&lt;/t:mi&gt;&lt;t:msup&gt;&lt;t:mi&gt;H&lt;/t:mi&gt;&lt;t:mrow&gt;&lt;t:mo&gt;±&lt;/t:mo&gt;&lt;t:mo&gt;±&lt;/t:mo&gt;&lt;/t:mrow&gt;&lt;/t:msup&gt;&lt;/t:msub&gt;&lt;t:mo&gt;≲&lt;/t:mo&gt;&lt;t:mn&gt;2.6&lt;/t:mn&gt;&lt;t:mo stretchy=\"false\"&gt;(&lt;/t:mo&gt;&lt;t:mn&gt;7.1&lt;/t:mn&gt;&lt;t:mo stretchy=\"false\"&gt;)&lt;/t:mo&gt;&lt;t:mtext&gt; &lt;/t:mtext&gt;&lt;t:mtext&gt; &lt;/t:mtext&gt;&lt;t:mi&gt;TeV&lt;/t:mi&gt;&lt;/t:math&gt; at the 3 (10) TeV muon collider when the triplet VEV &lt;x:math xmlns:x=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;x:msub&gt;&lt;x:mi&gt;v&lt;/x:mi&gt;&lt;x:mi mathvariant=\"normal\"&gt;Δ&lt;/x:mi&gt;&lt;/x:msub&gt;&lt;x:mo&gt;≲&lt;/x:mo&gt;&lt;x:mn&gt;3&lt;/x:mn&gt;&lt;x:mtext&gt; &lt;/x:mtext&gt;&lt;x:mtext&gt; &lt;/x:mtext&gt;&lt;x:mi&gt;eV&lt;/x:mi&gt;&lt;/x:math&gt;. &lt;jats:supplementary-material&gt; &lt;jats:copyright-statement&gt;Published by the American Physical Society&lt;/jats:copyright-statement&gt; &lt;jats:co","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"129 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961282","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":"Higher derivative scalar-vector-tensor theories from Kaluza-Klein reductions of Horndeski theory","authors":"S. Mironov, A. Shtennikova, M. Valencia-Villegas","doi":"10.1103/physrevd.111.024028","DOIUrl":"https://doi.org/10.1103/physrevd.111.024028","url":null,"abstract":"It was recently pointed out that some precise photon-Galileon couplings in four dimensions (4D)—inspired by a higher dimensional reduction—are enough to obtain a Horndeski theory that is less constrained by the stringent experimental bounds on the speed of gravitational waves. They imply the constancy of the ratio of speed of gravity to light throughout cosmic evolution. This holds even if we include the general scalar potentials G</a:mi>4</a:mn></a:msub>(</a:mo>π</a:mi>,</a:mo>X</a:mi>)</a:mo></a:math> and <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:msub><e:mi>G</e:mi><e:mn>5</e:mn></e:msub><e:mo stretchy=\"false\">(</e:mo><e:mi>π</e:mi><e:mo stretchy=\"false\">)</e:mo></e:math>. In this paper we go into the details of this 4D luminal extension of Horndeski theory including its scalar sector. We also present the complete action including the general <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:msub><i:mi>G</i:mi><i:mn>5</i:mn></i:msub><i:mo stretchy=\"false\">(</i:mo><i:mi>π</i:mi><i:mo>,</i:mo><i:mi>X</i:mi><i:mo stretchy=\"false\">)</i:mo><i:mo>,</i:mo><i:msub><i:mi>G</i:mi><i:mn>6</i:mn></i:msub><i:mo stretchy=\"false\">(</i:mo><i:mi>π</i:mi><i:mo>,</i:mo><i:mi>X</i:mi><i:mo stretchy=\"false\">)</i:mo></i:math> scalar potentials. Thus we show all the <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mi>U</o:mi><o:mo stretchy=\"false\">(</o:mo><o:mn>1</o:mn><o:mo stretchy=\"false\">)</o:mo></o:math> gauge invariant vector Galileons in 4D that result from a Kaluza-Klein dimensional reduction from 5D Horndeski. They provide a coupling of a higher derivative vector to scalar modifications of gravity—namely, without inducing Ostrogradsky ghosts and keeping gauge invariance—in the aim to explore more universal couplings of dark energy to other matter, such as vectors and in particular the photon. <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":"31 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961284","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":"Pion mass dependence in Dπ scattering and the D0*(2300) resonance from lattice QCD","authors":"Haobo Yan, Chuan Liu, Liuming Liu, Yu Meng, Hanyang Xing","doi":"10.1103/physrevd.111.014503","DOIUrl":"https://doi.org/10.1103/physrevd.111.014503","url":null,"abstract":"Lattice QCD results for isospin I</a:mi>=</a:mo>1</a:mn></a:mrow>2</a:mn></a:mrow></a:mfrac></a:mrow></a:math> <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mi>D</c:mi><c:mi>π</c:mi></c:math> scattering are presented. Utilizing a series of <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:msub><e:mi>N</e:mi><e:mi mathvariant=\"normal\">f</e:mi></e:msub><e:mo>=</e:mo><e:mn>2</e:mn><e:mo>+</e:mo><e:mn>1</e:mn></e:math> Wilson-Clover ensembles with pion masses of <h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><h:msub><h:mi>m</h:mi><h:mi>π</h:mi></h:msub><h:mo>≈</h:mo><h:mn>133</h:mn></h:math>, 208, 305, and 317 MeV, various two-particle operators are constructed, and the corresponding finite-volume spectra are determined. The <j:math xmlns:j=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><j:mi>S</j:mi></j:math>- and <l:math xmlns:l=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><l:mi>P</l:mi></l:math>-wave scattering phase shifts are extracted using the Lüscher approach. A clear trend for the motion of the <n:math xmlns:n=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><n:msubsup><n:mi>D</n:mi><n:mn>0</n:mn><n:mo>*</n:mo></n:msubsup><n:mo stretchy=\"false\">(</n:mo><n:mn>2300</n:mn><n:mo stretchy=\"false\">)</n:mo></n:math> pole is identified. With the physical pion mass configurations also included, this calculation constitutes the first lattice calculation in which the pion mass dependence of the <r:math xmlns:r=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><r:msubsup><r:mi>D</r:mi><r:mn>0</r:mn><r:mo>*</r:mo></r:msubsup><r:mo stretchy=\"false\">(</r:mo><r:mn>2300</r:mn><r:mo stretchy=\"false\">)</r:mo></r:math> pole is investigated and the scattering lengths are extrapolated/interpolated to the physical pion mass in <v:math xmlns:v=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><v:mi>D</v:mi><v:mi>π</v:mi></v:math> scattering. <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":"24 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961294","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":"Massless fermions in uniform flux background on T2×R : Vacuum quantum numbers from single-particle filled modes using lattice regulator","authors":"Nikhil Karthik, Rajamani Narayanan, Ray Romero","doi":"10.1103/physrevd.111.014502","DOIUrl":"https://doi.org/10.1103/physrevd.111.014502","url":null,"abstract":"The quantum numbers of monopoles in R</a:mi></a:mrow>3</a:mn></a:mrow></a:msup></a:mrow></a:math> in the presence of massless fermions have been analyzed using a uniform flux background in <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:msup><c:mi>S</c:mi><c:mn>2</c:mn></c:msup><c:mo>×</c:mo><c:mi>R</c:mi></c:math> coupled to fermions. An analogous study in <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:msup><e:mi>T</e:mi><e:mn>2</e:mn></e:msup><e:mo>×</e:mo><e:mi>R</e:mi></e:math> is performed by studying the discrete symmetries of the Dirac Hamiltonian in the presence of a static uniform field on <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:msup><g:mi>T</g:mi><g:mn>2</g:mn></g:msup></g:math> with a total flux of <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:mi>Q</i:mi></i:math> in the continuum. The degenerate ground states are classified based on their transformation properties under <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:mfrac><k:mi>π</k:mi><k:mn>2</k:mn></k:mfrac></k:math> rotations of <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><m:msup><m:mi>T</m:mi><m:mn>2</m:mn></m:msup></m:math> that leave the background field invariant. We find that the lattice analysis with overlap fermions exactly reproduces the transformation properties of the single-particle zero modes in the continuum. Whereas the transformation properties of the single-particle negative energy states can be studied in the continuum and the lattice, we are also able to study the transformation properties and the particle number (charge) of the many-body ground state on a finite lattice, and we show that the contributions from the fully filled single-particle states cannot be ignored. <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":"46 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961280","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":"Ultrarelativistic gravity and extremely energetic cosmic ray","authors":"R. Plyatsko, M. Fenyk","doi":"10.1103/physrevd.111.l021302","DOIUrl":"https://doi.org/10.1103/physrevd.111.l021302","url":null,"abstract":"Two main factors are taken into account when describing the behavior of energetic cosmic rays near black holes: the strong magnetic field and gravity, which determines the geodesic motion of the particles. We draw attention to the third factor: since cosmic ray particles have a nonzero spin, the spin-gravity coupling can play an important role in the ultrarelativistic regime. The reaction of the spinning particle on the gravitomagnetic components of the field of the fast-moving Schwarzschild mass is considered. Some examples and numerical estimations are presented. <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":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940223","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":"Constraints on the maximal number of dark degrees of freedom from black hole evaporation, cosmic rays, colliders, and supernovae","authors":"Chris Ewasiuk, Stefano Profumo","doi":"10.1103/physrevd.111.015008","DOIUrl":"https://doi.org/10.1103/physrevd.111.015008","url":null,"abstract":"A dark sector with a very large number of massive degrees of freedom is generically constrained by radiative corrections to Newton’s constant. However, there are caveats to this statement, especially if the degrees of freedom are light or massless. Here, we examine in detail and update a number of constraints on the possible number of dark degrees of freedom, including from black hole evaporation, from perturbations to systems including an evaporating black hole, from direct gravitational production at colliders, from high-energy cosmic rays, and from supernovae energy losses. <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":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961285","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}