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  1. The nontrivial topology of spin systems such as skyrmions in real space can promote complex electronic states. Here, we provide a general viewpoint at the emergence of topological spectral gaps in spin systems based on the methods of noncommutativeK-theory. By realizing that the structure of the observable algebra of spin textures is determined by the algebraic properties of the noncommutative torus, we arrive at a unified understanding of topological electronic states which we predict to arise in various noncollinear setups. The power of our approach lies in an ability to categorize emergent topological states algebraically without referring to smooth real- or reciprocal-space quantities. This opens a way towards an educated design of topological phases in aperiodic, disordered, or nonsmooth textures of spins and charges containing topological defects.

    <supplementary-material><permissions><copyright-statement>Published by the American Physical Society</copyright-statement><copyright-year>2024</copyright-year></permissions></supplementary-material></sec> </div> <a href='#' class='show open-abstract' style='margin-left:10px;'>more »</a> <a href='#' class='hide close-abstract' style='margin-left:10px;'>« less</a> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> <a class="misc external-link" href="https://doi.org/10.1103/PhysRevResearch.6.013102" target="_blank" title="Link to document DOI" data-ostiid="10555583"> Full Text Available <span class="fas fa-external-link-alt"></span> </a> </span> </div> </div><div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemscope itemtype="http://schema.org/TechArticle"> <div class="item-info"> <div class="title"> <a href="https://par.nsf.gov/biblio/10422204-probing-mev-scale-scalar-boson-association-tev-scale-top-quark-partner-lhc" itemprop="url"> <span class='span-link' itemprop="name">Probing an MeV-scale scalar boson in association with a TeV-Scale top-quark partner at the LHC</span> </a> </div> <div> <strong> <a class="misc external-link" href="https://doi.org/10.1007/JHEP03(2023)164" target="_blank" title="Link to document DOI">https://doi.org/10.1007/JHEP03(2023)164  <span class="fas fa-external-link-alt"></span></a> </strong> </div> <div class="metadata"> <span class="authors"> <span class="author" itemprop="author">Dutta, Bhaskar</span> <span class="sep">; </span><span class="author" itemprop="author">Ghosh, Sumit</span> <span class="sep">; </span><span class="author" itemprop="author">Gurrola, Alfredo</span> <span class="sep">; </span><span class="author" itemprop="author">Julson, Dale</span> <span class="sep">; </span><span class="author" itemprop="author">Kamon, Teruki</span> <span class="sep">; </span><span class="author" itemprop="author">Kumar, Jason</span> </span> <span class="year">( <time itemprop="datePublished" datetime="2023-03-01">March 2023</time> , Journal of High Energy Physics) </span> </div> <div style="cursor: pointer;-webkit-line-clamp: 5;" class="abstract" itemprop="description"> A bstract Searches for new low-mass matter and mediator particles have actively been pursued at fixed target experiments and at e + e − colliders. It is challenging at the CERN LHC, but they have been searched for in Higgs boson decays and in B meson decays by the ATLAS and CMS Collaborations, as well as in a low transverse momentum phenomena from forward scattering processes (e.g., FASER). We propose a search for a new scalar particle in association with a heavy vector-like quark. We consider the scenario in which the top quark ( t ) couples to a light scalar ϕ′ and a heavy vector-like top quark T . We examine single and pair production of T in pp collisions, resulting in a final state with a top quark that decays purely hadronically, a T which decays semileptonically ( T → W + b → ℓ ν b ), and a ϕ′ that is very boosted and decays to a pair of collimated photons which can be identified as a merged photon system. The proposed search is expected to achieve a discovery reach with signal significance greater than 5 σ (3 σ ) for m ( T ) as large as 1.8 (2) TeV and m ( ϕ′ ) as small as 1 MeV, assuming an integrated luminosity of 3000 fb − 1 . This search can expand the reach of T , and demonstrates that the LHC can probe low-mass, MeV-scale particles. </div> <a href='#' class='show open-abstract' style='margin-left:10px;'>more »</a> <a href='#' class='hide close-abstract' style='margin-left:10px;'>« less</a> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> <a class="misc external-link" href="https://doi.org/10.1007/JHEP03(2023)164" target="_blank" title="Link to document DOI" data-ostiid="10422204"> Full Text Available <span class="fas fa-external-link-alt"></span> </a> </span> </div> </div><div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemscope itemtype="http://schema.org/TechArticle"> <div class="item-info"> <div class="title"> <a href="https://par.nsf.gov/biblio/10447216-sensitivity-dark-sector-scales-from-gravitational-wave-signatures" itemprop="url"> <span class='span-link' itemprop="name">Sensitivity to dark sector scales from gravitational wave signatures</span> </a> </div> <div> <strong> <a class="misc external-link" href="https://doi.org/10.1007/JHEP08(2022)300" target="_blank" title="Link to document DOI">https://doi.org/10.1007/JHEP08(2022)300  <span class="fas fa-external-link-alt"></span></a> </strong> </div> <div class="metadata"> <span class="authors"> <span class="author" itemprop="author">Dent, James B.</span> <span class="sep">; </span><span class="author" itemprop="author">Dutta, Bhaskar</span> <span class="sep">; </span><span class="author" itemprop="author">Ghosh, Sumit</span> <span class="sep">; </span><span class="author" itemprop="author">Kumar, Jason</span> <span class="sep">; </span><span class="author" itemprop="author">Runburg, Jack</span> </span> <span class="year">( <time itemprop="datePublished" datetime="2022-08-01">August 2022</time> , Journal of High Energy Physics) </span> </div> <div style="cursor: pointer;-webkit-line-clamp: 5;" class="abstract" itemprop="description"> A bstract We consider gravitational sound wave signals produced by a first-order phase transition in a theory with a generic renormalizable thermal effective potential of power law form. We find the frequency and amplitude of the gravitational wave signal can be related in a straightforward manner to the parameters of the thermal effective potential. This leads to a general conclusion; if the mass of the dark Higgs is less than 1% of the dark Higgs vacuum expectation value, then the gravitational wave signal will be unobservable at all upcoming and planned gravitational wave observatories. Although the understanding of gravitational wave production at cosmological phase transitions is still evolving, we expect this result to be robust. </div> <a href='#' class='show open-abstract' style='margin-left:10px;'>more »</a> <a href='#' class='hide close-abstract' style='margin-left:10px;'>« less</a> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> <a class="misc external-link" href="https://doi.org/10.1007/JHEP08(2022)300" target="_blank" title="Link to document DOI" data-ostiid="10447216"> Full Text Available <span class="fas fa-external-link-alt"></span> </a> </span> </div> </div><div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemscope itemtype="http://schema.org/TechArticle"> <div class="item-info"> <div class="title"> <a href="https://par.nsf.gov/biblio/10348343-explaining-g2-rk-using-light-mediators-t3r" itemprop="url"> <span class='span-link' itemprop="name">Explaining gμ−2 and RK(*) using the light mediators of U(1)T3R</span> </a> </div> <div> <strong> <a class="misc external-link" href="https://doi.org/10.1103/PhysRevD.105.015011" target="_blank" title="Link to document DOI">https://doi.org/10.1103/PhysRevD.105.015011  <span class="fas fa-external-link-alt"></span></a> </strong> </div> <div class="metadata"> <span class="authors"> <span class="author" itemprop="author">Dutta, Bhaskar</span> <span class="sep">; </span><span class="author" itemprop="author">Ghosh, Sumit</span> <span class="sep">; </span><span class="author" itemprop="author">Huang, Peisi</span> <span class="sep">; </span><span class="author" itemprop="author">Kumar, Jason</span> </span> <span class="year">( <time itemprop="datePublished" datetime="2022-01-01">January 2022</time> , Physical Review D) </span> </div> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> <a class="misc external-link" href="https://doi.org/10.1103/PhysRevD.105.015011" target="_blank" title="Link to document DOI" data-ostiid="10348343"> Full Text Available <span class="fas fa-external-link-alt"></span> </a> </span> </div> </div><div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemscope itemtype="http://schema.org/TechArticle"> <div class="item-info"> <div class="title"> <a href="https://par.nsf.gov/biblio/10310277-low-mass-inelastic-dark-matter-direct-detection-via-migdal-effect" itemprop="url"> <span class='span-link' itemprop="name">Low-mass inelastic dark matter direct detection via the Migdal effect</span> </a> </div> <div> <strong> <a class="misc external-link" href="https://doi.org/10.1103/PhysRevD.104.076013" target="_blank" title="Link to document DOI">https://doi.org/10.1103/PhysRevD.104.076013  <span class="fas fa-external-link-alt"></span></a> </strong> </div> <div class="metadata"> <span class="authors"> <span class="author" itemprop="author">Bell, Nicole F.</span> <span class="sep">; </span><span class="author" itemprop="author">Dent, James B.</span> <span class="sep">; </span><span class="author" itemprop="author">Dutta, Bhaskar</span> <span class="sep">; </span><span class="author" itemprop="author">Ghosh, Sumit</span> <span class="sep">; </span><span class="author" itemprop="author">Kumar, Jason</span> <span class="sep">; </span><span class="author" itemprop="author">Newstead, Jayden L.</span> </span> <span class="year">( <time itemprop="datePublished" datetime="2021-10-01">October 2021</time> , Physical Review D) </span> </div> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> <a class="misc external-link" href="https://doi.org/10.1103/PhysRevD.104.076013" target="_blank" title="Link to document DOI" data-ostiid="10310277"> Full Text Available <span class="fas fa-external-link-alt"></span> </a> </span> </div> </div><div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemscope itemtype="http://schema.org/TechArticle"> <div class="item-info"> <div class="title"> <a href="https://par.nsf.gov/biblio/10310275-cosmic-ray-upscattered-inelastic-dark-matter" itemprop="url"> <span class='span-link' itemprop="name">Cosmic-ray upscattered inelastic dark matter</span> </a> </div> <div> <strong> <a class="misc external-link" href="https://doi.org/10.1103/PhysRevD.104.076020" target="_blank" title="Link to document DOI">https://doi.org/10.1103/PhysRevD.104.076020  <span class="fas fa-external-link-alt"></span></a> </strong> </div> <div class="metadata"> <span class="authors"> <span class="author" itemprop="author">Bell, Nicole F.</span> <span class="sep">; </span><span class="author" itemprop="author">Dent, James B.</span> <span class="sep">; </span><span class="author" itemprop="author">Dutta, Bhaskar</span> <span class="sep">; </span><span class="author" itemprop="author">Ghosh, Sumit</span> <span class="sep">; </span><span class="author" itemprop="author">Kumar, Jason</span> <span class="sep">; </span><span class="author" itemprop="author">Newstead, Jayden L.</span> <span class="sep">; </span><span class="author" itemprop="author">Shoemaker, Ian M.</span> </span> <span class="year">( <time itemprop="datePublished" datetime="2021-10-01">October 2021</time> , Physical Review D) </span> </div> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> <a class="misc external-link" href="https://doi.org/10.1103/PhysRevD.104.076020" target="_blank" title="Link to document DOI" data-ostiid="10310275"> Full Text Available <span class="fas fa-external-link-alt"></span> </a> </span> </div> </div><div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemscope itemtype="http://schema.org/TechArticle"> <div class="item-info"> <div class="title"> <a href="https://par.nsf.gov/biblio/10310274-explaining-xenon1t-excess-luminous-dark-matter" itemprop="url"> <span class='span-link' itemprop="name">Explaining the XENON1T Excess with Luminous Dark Matter</span> </a> </div> <div> <strong> <a class="misc external-link" href="https://doi.org/10.1103/PhysRevLett.125.161803" target="_blank" title="Link to document DOI">https://doi.org/10.1103/PhysRevLett.125.161803  <span class="fas fa-external-link-alt"></span></a> </strong> </div> <div class="metadata"> <span class="authors"> <span class="author" itemprop="author">Bell, Nicole F.</span> <span class="sep">; </span><span class="author" itemprop="author">Dent, James B.</span> <span class="sep">; </span><span class="author" itemprop="author">Dutta, Bhaskar</span> <span class="sep">; </span><span class="author" itemprop="author">Ghosh, Sumit</span> <span class="sep">; </span><span class="author" itemprop="author">Kumar, Jason</span> <span class="sep">; </span><span class="author" itemprop="author">Newstead, Jayden L.</span> </span> <span class="year">( <time itemprop="datePublished" datetime="2020-10-01">October 2020</time> , Physical Review Letters) </span> </div> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> <a class="misc external-link" href="https://doi.org/10.1103/PhysRevLett.125.161803" target="_blank" title="Link to document DOI" data-ostiid="10310274"> Full Text Available <span class="fas fa-external-link-alt"></span> </a> </span> </div> </div><div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemscope itemtype="http://schema.org/TechArticle"> <div class="item-info"> <div class="title"> <a href="https://par.nsf.gov/biblio/10419511-forward-physics-facility-high-luminosity-lhc" itemprop="url"> <span class='span-link' itemprop="name">The Forward Physics Facility at the High-Luminosity LHC</span> </a> </div> <div> <strong> <a class="misc external-link" href="https://doi.org/10.1088/1361-6471/ac865e" target="_blank" title="Link to document DOI">https://doi.org/10.1088/1361-6471/ac865e  <span class="fas fa-external-link-alt"></span></a> </strong> </div> <div class="metadata"> <span class="authors"> <span class="author" itemprop="author">Feng, Jonathan L</span> <span class="sep">; </span><span class="author" itemprop="author">Kling, Felix</span> <span class="sep">; </span><span class="author" itemprop="author">Reno, Mary Hall</span> <span class="sep">; </span><span class="author" itemprop="author">Rojo, Juan</span> <span class="sep">; </span><span class="author" itemprop="author">Soldin, Dennis</span> <span class="sep">; </span><span class="author" itemprop="author">Anchordoqui, Luis A</span> <span class="sep">; </span><span class="author" itemprop="author">Boyd, Jamie</span> <span class="sep">; </span><span class="author" itemprop="author">Ismail, Ahmed</span> <span class="sep">; </span><span class="author" itemprop="author">Harland-Lang, Lucian</span> <span class="sep">; </span><span class="author" itemprop="author">Kelly, Kevin J</span> <span class="sep">; </span><span class="author">et al</span></span> <span class="year">( <time itemprop="datePublished" datetime="2023-01-20">January 2023</time> , Journal of Physics G: Nuclear and Particle Physics) </span> </div> <div style="cursor: pointer;-webkit-line-clamp: 5;" class="abstract" itemprop="description"> Abstract High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along the beam collision axis, outside of the acceptance of existing LHC experiments. The proposed Forward Physics Facility (FPF), to be located several hundred meters from the ATLAS interaction point and shielded by concrete and rock, will host a suite of experiments to probe standard model (SM) processes and search for physics beyond the standard model (BSM). In this report, we review the status of the civil engineering plans and the experiments to explore the diverse physics signals that can be uniquely probed in the forward region. FPF experiments will be sensitive to a broad range of BSM physics through searches for new particle scattering or decay signatures and deviations from SM expectations in high statistics analyses with TeV neutrinos in this low-background environment. High statistics neutrino detection will also provide valuable data for fundamental topics in perturbative and non-perturbative QCD and in weak interactions. Experiments at the FPF will enable synergies between forward particle production at the LHC and astroparticle physics to be exploited. We report here on these physics topics, on infrastructure, detector, and simulation studies, and on future directions to realize the FPF’s physics potential. </div> <a href='#' class='show open-abstract' style='margin-left:10px;'>more »</a> <a href='#' class='hide close-abstract' style='margin-left:10px;'>« less</a> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> <a class="misc external-link" href="https://doi.org/10.1088/1361-6471/ac865e" target="_blank" title="Link to document DOI" data-ostiid="10419511"> Full Text Available <span class="fas fa-external-link-alt"></span> </a> </span> </div> </div><div class="clearfix"></div> </div> </li> </ol> <div id="pagination-lower" style="display:none;"> <div class="pull-right" style="line-height: 30px;"> <div class="btn-group pagination nomargin"> <a href="#" class="btn btn-sm btn-default noborderradius" disabled="disabled">«<span class="hidden-xs"> Prev</span></a> <a class="dropdown-toggle btn btn-sm btn-default paging-dropdown disabled hidden-xs noborderradius" href="#" data-toggle="dropdown"> <span class="caret"></span> <span class="sr-only" style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">Select page number</span> </a> <a href="#" class="btn btn-sm btn-default noborderradius" disabled="disabled"><span class="hidden-xs">Next </span>»</a> </div> </div> <div class="clearfix"></div> </div> </div> </div> </div> <!-- / basic search results --> </div> </div> <input type='hidden' id='schtype' value=''/> </div> </div> <footer class="row" id="footer-wrapper"> <div class="footer-content"> <div id="footerOSTI" class=" hidden-print"> <ul> <li><a target="_blank" rel="noreferrer" href="http://www.nsf.gov/policies/">Website Policies</a> | <a target="_blank" rel="noreferrer" href="http://www.nsf.gov/about/performance/">Budget and Performance</a> | <a target="_blank" rel="noreferrer" href="http://www.nsf.gov/oig/">Inspector General</a> | <a target="_blank" rel="noreferrer" href="http://www.nsf.gov/policies/privacy.jsp">Privacy</a> | <a target="_blank" rel="noreferrer" href="http://www.nsf.gov/policies/foia.jsp">FOIA</a> | <a target="_blank" rel="noreferrer" href="http://www.nsf.gov/od/odi/notice.jsp">No FEAR Act</a> | <a target="_blank" rel="noreferrer" href="http://usa.gov">USA.gov</a> | <a target="_blank" rel="noreferrer" href="http://www.nsf.gov/policies/access.jsp">Accessibility</a> | <a target="_blank" rel="noreferrer" href="http://www.nsf.gov/policies/nsf_plain_language.jsp">Plain Language</a> | <a target="_blank" rel="noreferrer" href="http://www.nsf.gov/help/contact.jsp">Contact</a> | <a target="_blank" rel="noreferrer" href="https://nsf.gov/help/">Help</a> </li> </ul> The National Science Foundation, 2415 Eisenhower Avenue, Alexandria, Virginia 22314, USA Tel: (703) 292-5111, FIRS: (800) 877-8339 | TDD: (800) 281-8749 </div> </div> </footer> </div> <div id="authorselect" class="modal" tabindex="-1" role="dialog" aria-labelledby="authorselect_label" aria-hidden="true"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button> <div id="authorselect_label">Author Select</div> </div> <form id="authorselect-form" style="margin-bottom: 0px;"> <input type="hidden" name="pg" id="authorselect-pg" value="1" /> <div class="modal-body" id="authorselect_body"> <div class="row"> <div class="col-md-4"> <label for="authorselect-lname">Last Name:</label><br /> <input type="text" name="lname" class="input-sm form-control" id="authorselect-lname" placeholder="Last name" /><br /> </div> <div class="col-md-4"> <label for="authorselect-fname">First Name:</label><br /> <input type="text" name="fname" class="input-sm form-control" id="authorselect-fname" placeholder="First name" /> </div> <div class="col-md-2">  <br /> <a href="#" onclick="$('#authorselect-form').submit(); return false;" class="btn btn-sm btn-default"><span class="fa fa-search"></span><span class="sr-only">Search</span></a> </div> </div> <div class="push_top"></div> <div class="row"> <div class="col-md-12"> <ul class="nav nav-tabs"> <li class="active"><a href="#authorselect-tab-res" id="authorselect-tab-res-btn" data-toggle="tab">Search Results</a></li> <li><a href="#authorselect-tab-sel" id="authorselect-tab-sel-btn" data-toggle="tab">Selected Authors</a></li> </ul> <div class="tab-content"> <div class="tab-pane active" id="authorselect-tab-res" style="max-height: 450px;"> <div class="padding text-muted" id="authorselect-tab-res-content">Type in a name, or the first few letters of a name, in one or both of appropriate search boxes above and select the search button. 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