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Superradiant Interactions for Relic Detection with Entangled Nuclear Spins
Marios Galanis, Onur Hosten, Asimina Arvanitaki +1
We recently showed that macroscopic nuclear spin ensembles prepared in coherent spin states can dramatically enhance the interaction rates of weakly interacting cosmic relics-such…
Superradiant Interactions of the Cosmic Neutrino Background, Axions, Dark Matter, and Reactor Neutrinos
Asimina Arvanitaki, Savas Dimopoulos, Marios Galanis
In this paper we do three things. First, we outline the conditions under which the interaction rate of inelastic processes that change the internal state of a system of targets…
A Diffraction Grating for the Cosmic Neutrino Background and Dark Matter
Asimina Arvanitaki, Savas Dimopoulos
We propose structures of size between meter to 100 meters that drastically alter the local distribution of the Cosmic Neutrino Background (). These structures have a…
The Cosmic Neutrino Background on the Surface of the Earth
Asimina Arvanitaki, Savas Dimopoulos
We argue that the reflection of relic neutrinos from the surface of the Earth results in a significant local asymmetry, far exceeding the expected primordial lepton asymm…
Dark QED from Inflation
Asimina Arvanitaki, Savas Dimopoulos, Marios Galanis +3
One contribution to any dark sector's abundance comes from its gravitational production during inflation. If the dark sector is weakly coupled to the inflaton and the Standard Mode…
Resonant absorption of bosonic dark matter in molecules
Asimina Arvanitaki, Savas Dimopoulos, Ken Van Tilburg
We propose a new class of bosonic dark matter (DM) detectors based on resonant absorption onto a gas of small polyatomic molecules. Bosonic DM acts on the molecules as a narrow-ban…
A small weak scale from a small cosmological constant
Asimina Arvanitaki, Savas Dimopoulos, Victor Gorbenko +2
We propose a framework in which Weinberg's anthropic explanation of the cosmological constant problem also solves the hierarchy problem. The weak scale is selected by chiral dynami…
A collider observable QCD axion
Savas Dimopoulos, Anson Hook, Junwu Huang +1
We present a model where the QCD axion is at the TeV scale and visible at a collider via its decays. Conformal dynamics and strong CP considerations account for the axion coupling…
Black Hole Mergers and the QCD Axion at Advanced LIGO
Asimina Arvanitaki, Masha Baryakhtar, Savas Dimopoulos +2
In the next few years Advanced LIGO (aLIGO) may see gravitational waves (GWs) from thousands of black hole (BH) mergers. This marks the beginning of a new precision tool for physic…
Sound of Dark Matter: Searching for Light Scalars with Resonant-Mass Detectors
Asimina Arvanitaki, Savas Dimopoulos, Ken Van Tilburg
The fine-structure constant and the electron mass in string theory are determined by the values of scalar fields called moduli. If the dark matter takes on the form of such a light…
Auto-Concealment of Supersymmetry in Extra Dimensions
Savas Dimopoulos, Kiel Howe, John March-Russell +1
In supersymmetric (SUSY) theories with extra dimensions the visible energy in sparticle decays can be significantly reduced and its energy distribution broadened, thus significantl…
Maximally Natural Supersymmetry
Savas Dimopoulos, Kiel Howe, John March-Russell
We consider 4D weak scale theories arising from 5D supersymmetric (SUSY) theories with maximal Scherk-Schwarz breaking at a Kaluza-Klein (KK) scale of several TeV. Many of the prob…
Mini-Split
Asimina Arvanitaki, Nathaniel Craig, Savas Dimopoulos +1
The lack of evidence for new physics beyond the standard model at the LHC points to a paucity of new particles near the weak scale. This suggests that the weak scale is tuned and t…
Split families unified
Nathaniel Craig, Savas Dimopoulos, Tony Gherghetta
We present a simple supersymmetric model of split families consistent with flavor limits that preserves the successful prediction of gauge coupling unification and naturally accoun…
Phenomenology of TeV Little String Theory from Holography
Ignatios Antoniadis, Asimina Arvanitaki, Savas Dimopoulos +1
We study the graviton phenomenology of TeV Little String Theory by exploiting its holographic gravity dual five-dimensional theory. This dual corresponds to a linear dilaton backgr…
String Photini at the LHC
Asimina Arvanitaki, Nathaniel Craig, Savas Dimopoulos +2
String theories with topologically complex compactification manifolds suggest the simultaneous presence of many unbroken U(1)'s without any light matter charged under them. The gau…
Decaying Dark Matter as a Probe of Unification and TeV Spectroscopy
Asimina Arvanitaki, Savas Dimopoulos, Sergei Dubovsky +3
In supersymmetric unified theories the dark matter particle can decay, just like the proton, through grand unified interactions with a lifetime of order of 10^{26} sec. Its decay p…
Astrophysical Probes of Unification
Asimina Arvanitaki, Savas Dimopoulos, Sergei Dubovsky +3
Traditional ideas for testing unification involve searching for the decay of the proton and its branching modes. We point out that several astrophysical experiments are now reachin…
General Relativistic Effects in Atom Interferometry
Savas Dimopoulos, Peter W. Graham, Jason M. Hogan +1
Atom interferometry is now reaching sufficient precision to motivate laboratory tests of general relativity. We begin by explaining the non-relativistic calculation of the phase sh…
Testing Atom and Neutron Neutrality with Atom Interferometry
Asimina Arvanitaki, Savas Dimopoulos, Andrew A. Geraci +2
We propose an atom-interferometry experiment based on the scalar Aharonov-Bohm effect which detects an atom charge at the 10^{-28}e level, and improves the current laboratory limit…
Stopping Gluinos
A. Arvanitaki, S. Dimopoulos, A. Pierce +2
Long lived gluinos are the trademark of split supersymmetry. They form R-hadrons that, when charged, efficiently lose energy in matter via ionisation. Independent of R-spectroscopy…
Aspects of Split Supersymmetry
N. Arkani-Hamed, S. Dimopoulos, G. F. Giudice +1
We explore some fundamental differences in the phenomenology, cosmology and model building of Split Supersymmetry compared with traditional low-scale supersymmetry. We show how the…
Probing Sub-Micron Forces by Interferometry of Bose-Einstein Condensed Atoms
Savas Dimopoulos, Andrew A. Geraci
We propose a technique, using interferometry of Bose-Einstein condensed alkali atoms, for the detection of sub-micron-range forces. It may extend present searches at 1 micron by 6…
The Beyond the Standard Model Working Group: Summary Report
G. Azuelos, J. Gunion, J. Hewett +26
Report of the "Beyond the Standard Model" working group for the Workshop `Physics at TeV Colliders', Les Houches, France, 21 May - 1 June 2001. It consists of 18 separate parts: 1.…