Now showing items 1-20 of 38

• #### The AdS/QCD correspondence: still undelivered ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ...
• #### Deciphering the MSSM Higgs Mass at Future Hadron Colliders ﻿

(Springer Nature, 2017-06)
Future hadron colliders will have a remarkable capacity to discover massive new particles, but their capabilities for precision measurements of couplings that can reveal underlying mechanisms have received less study. In ...
• #### Double-Disk Dark Matter ﻿

(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 ﻿

(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 ...
• #### Electric Dipole Moments in Natural Supersymmetry ﻿

(Springer Nature, 2017-08)
We discuss electric dipole moments (EDMs) in the framework of CP-violating natural supersymmetry (SUSY). Recent experimental results have significantly tightened constraints on the EDMs of electrons and of mercury, and ...
• #### Evidence for a Sublattice Weak Gravity Conjecture ﻿

(Springer Nature, 2017-08-08)
The Weak Gravity Conjecture postulates the existence of superextremal charged particles, i.e. those with mass smaller than or equal to their charge in Planck units. We present further evidence for our recent observation ...
• #### Experimental considerations motivated by the diphoton excess at the LHC ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ...
• #### Nonthermal Production of Dark Radiation and Dark Matter ﻿

(Springer Nature, 2016)
Dark matter may be coupled to dark radiation: light degrees of freedom that mediate forces between dark sector particles. Cosmological constraints favor dark radiation that is colder than Standard Model radiation. In ...
• #### Physics at a Higgs factory ﻿

(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 ﻿

(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 ...