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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…
Heating up the Galaxy with Hidden Photons
Sergei Dubovsky, Guzmán Hernández-Chifflet
We elaborate on the dynamics of ionized interstellar medium in the presence of hidden photon dark matter. Our main focus is the ultra-light regime, where the hidden photon mass is…
Black Hole Portal into Hidden Valleys
Sergei Dubovsky, Victor Gorbenko
Superradiant instability turns rotating astrophysical black holes into unique probes of light axions. We consider what happens when a light axion is coupled to a strongly coupled h…
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…
(No) Eternal Inflation and Precision Higgs Physics
Nima Arkani-Hamed, Sergei Dubovsky, Leonardo Senatore +1
Even if nothing but a light Higgs is observed at the LHC, suggesting that the Standard Model is unmodified up to scales far above the weak scale, Higgs physics can yield surprises…
Star tracks in the ghost condensate
S. L. Dubovsky
We consider the infrared modification of gravity by ghost condensate. Naively, in this scenario one expects sizeable modification of gravity at distances of order 1000 km, provided…
Grand unification with gauge mediated supersymmetry breaking
S. L. Dubovsky, D. S. Gorbunov, S. V. Troitsky
We consider constraints on gauge mediated supersymmetry breaking models imposed by the requirement of grand unification. In particular, we demonstrate several ways to reduce the nu…
Flavor violation and in gauge mediated models with messenger-matter mixing
S. L. Dubovsky, D. S. Gorbunov
We consider the Minimal Gauge Mediated Model (MGMM) with either fundamental or antisymmetric messenger multiplets and study consequences of messenger-matter mixing. We find that in…
Galactic Anisotropy as Signature of ``Top-Down'' Mechanisms of Ultra-High Energy Cosmic Rays
S. L. Dubovsky, P. G. Tinyakov
We show that ``top-down'' mechanisms of Ultra-High Energy Cosmic Rays which involve heavy relic particle-like objects predict Galactic anisotropy of highest energy cosmic rays at t…
Towards common origin of supersymmetry breaking, compositeness, and gauge mediation
S. L. Dubovsky, D. S. Gorbunov, S. V. Troitsky
We present a toy model which has the following properties: i) it is strongly coupled at a certain scale and breaks supersymmetry at this scale; ii) matter superfields of (one gener…
Dynamical supersymmetry breaking and unification of couplings
S. L. Dubovsky, D. S. Gorbunov, S. V. Troitsky
We consider the possibility of unification of the Supersymmetric Standard Model gauge groups with those of the dynamical supersymmetry breaking (DSB) sector in theories with gauge…
Messenger-matter mixing and lepton flavor violation
S. L. Dubovsky, D. S. Gorbunov
We consider the Minimal Gauge Mediated Model (MGMM) with messenger-matter mixing and find that existing experimental limits on decay and - conversion place signifi…