Now showing items 1-20 of 33

    • The AdS/QCD correspondence: still undelivered 

      Csáki, Csaba; Reece, Matthew; Terning, John (Springer Science + Business Media, 2009)
      We consider the particle spectrum and event shapes in large N gauge theories in different regimes of the short-distance ’t Hooft coupling, λ. The mesons in the small λ limit should have a Regge spectrum in order to agree ...
    • Axion experiments to algebraic geometry — Testing quantum gravity via the Weak Gravity Conjecture 

      Heidenreich, Benjamin; Reece, Matthew; Rudelius, Tom (World Scientific Pub Co Pte Lt, 2016)
      Common features of known quantum gravity theories may hint at the general nature of quantum gravity. The absence of continuous global symmetries is one such feature. This inspired the Weak Gravity Conjecture, which bounds ...
    • Axion experiments to algebraic geometry: Testing quantum gravity via the Weak Gravity Conjecture 

      Heidenreich, Ben; Reece, Matthew; Rudelius, Tom (World Scientific Pub Co Pte Lt, 2016)
      Common features of known quantum gravity theories may hint at the general nature of quantum gravity. The absence of continuous global symmetries is one such feature. This inspired the Weak Gravity Conjecture, which bounds ...
    • Continuum-mediated dark matter–baryon scattering 

      Katz, Andrey; Reece, Matthew; Sajjad, Aqil (Elsevier BV, 2016)
      Many models of dark matter scattering with baryons may be treated either as a simple contact interaction or as the exchange of a light mediator particle. We study an alternative, in which a continuum of light mediator ...
    • Dark-Disk Universe 

      Fan, JiJi; Katz, Andrey; Randall, Lisa; Reece, Matthew (American Physical Society (APS), 2013)
      We point out that current constraints on dark matter imply only that the majority of dark matter is cold and collisionless. A subdominant fraction of dark matter could have much stronger interactions. In particular, it ...
    • Double-Disk Dark Matter 

      Fan, JiJi; Katz, Andrey; Randall, Lisa; Reece, Matthew (Elsevier BV, 2013)
      Based on observational tests of large scale structure and constraints on halo structure, dark matter is generally taken to be cold and essentially collisionless. On the other hand, given the large number of particles and ...
    • Effective field theory and keV lines from dark matter 

      Krall, Rebecca Ann; Reece, Matthew; Roxlo, Thomas (IOP Publishing, 2014)
      We survey operators that can lead to a keV photon line from dark matter decay or annihilation. We are motivated in part by recent claims of an unexplained 3.5 keV line in galaxy clusters and in Andromeda, but our results ...
    • Experimental considerations motivated by the diphoton excess at the LHC 

      Agrawal, Prateek; Fan, JiJi; Heidenreich, Benjamin; Reece, Matthew; Strassler, Matthew (Springer Nature, 2016)
      We consider the immediate or near-term experimental opportunities offered by some scenarios that could explain the new diphoton excess at the LHC. If the excess is due to a new particle Xs at 750 GeV, additional new particles ...
    • In wino veritas? Indirect searches shed light on neutralino dark matter 

      Fan, JiJi; Reece, Matthew (Springer Science + Business Media, 2013)
      Indirect detection constraints on gamma rays (both continuum and lines) have set strong constraints on wino dark matter. By combining results from Fermi-LAT and HESS, we show that: dark matter made entirely of light ...
    • (Light) Stop Signs 

      Han, Zhenyu; Katz, Andrey; Krohn, David; Reece, Matthew (Springer Verlag, 2012)
      Stop squarks with a mass just above the top’s and which decay to a nearly massless LSP are difficult to probe because of the large SM di-top background. Here we discuss search strategies which could be used to set more ...
    • Long-lived neutralino NLSPs 

      Meade, Patrick; Reece, Matthew; Shih, David J. H. (Springer Science + Business Media, 2010)
      We investigate the collider signatures of heavy, long-lived, neutral particles that decay to charged particles plus missing energy. Specifically, we focus on the case of a neutralino NLSP decaying to Z and gravitino within ...
    • Naturalness, b to sγ, and SUSY heavy Higgses 

      Katz, Andrey; Reece, Matthew; Sajjad, Aqil (Springer Science + Business Media, 2014)
      We explore naturalness constraints on the masses of the heavy Higgs bosons \(H^0\) , \(H^ ±\), and \(A^0\) in supersymmetric theories. We show that, in any extension of MSSM which accommodates the 125 GeV Higgs at the tree ...
    • A new look at Higgs constraints on stops 

      Fan, JiJi; Reece, Matthew (Springer Science + Business Media, 2014)
      We present a simple new way to visualize the constraints of Higgs coupling measurements on light stops in natural SUSY scenarios beyond the MSSM, which works directly in the plane of stop mass eigenvalues (with no need to ...
    • Non-relativistic effective theory of dark matter direct detection 

      Fan, JiJi; Reece, Matthew; Wang, Lian-Tao (IOP Publishing, 2010)
      Dark matter direct detection searches for signals coming from dark matter scattering against nuclei at a very low recoil energy scale ∼ 10 keV. In this paper, a simple non-relativistic effective theory is constructed to ...
    • Physics at a Higgs factory 

      Reece, Matthew (World Scientific Pub Co Pte Lt, 2016)
      colliders, including the ILC, FCC-ee, and CEPC. The goal is to explain some of the measurements that can be done in the context of electroweak precision tests and Higgs couplings, to compare some of the options under ...
    • Possible futures of electroweak precision: ILC, FCC-ee, and CEPC 

      Fan, JiJi; Reece, Matthew; Wang, Lian-Tao (Springer Science + Business Media, 2015)
      The future of high-precision electroweak physics lies in e + e − collider measurements of properties of the Z boson, the W boson, the Higgs boson, and the top quark. We estimate the expected performance of three possible ...
    • Precision natural SUSY at CEPC, FCC-ee, and ILC 

      Fan, JiJi; Reece, Matthew; Wang, Lian-Tao (Springer Science + Business Media, 2015)
      Testing the idea of naturalness is and will continue to be one of the most important goals of high energy physics experiments. It will play a central role in the physics program of future colliders. In this paper, we present ...
    • Probing charged matter through h → γγ, gamma ray lines, and EDMs 

      Fan, JiJi; Reece, Matthew (Springer Science + Business Media, 2013)
      Numerous experiments currently underway offer the potential to indirectly probe new charged particles with masses at the weak scale. For example, the tentative excess in h → γγ decays and the tentative gamma-ray line in ...
    • Prompt decays of general neutralino NLSPs at the Tevatron 

      Meade, Patrick; Reece, Matthew; Shih, David J. H. (Springer Science + Business Media, 2010)
      Recent theoretical developments have shown that gauge mediation has a much larger parameter space of possible spectra and mixings than previously considered. Motivated by this, we explore the collider phenomenology of gauge ...
    • Randall-Sundrum and strings 

      Reece, Matthew; Wang, Lian-Tao (Springer Science + Business Media, 2010)
      We investigate stringy excitations in Randall-Sundrum effective theories for electroweak symmetry breaking arising from embedding in string theory. RS is dual to a confining gauge theory, which we expect to have “QCD ...