426 citations · 1.1k across the 18 of their papers we have counts for
19 papers
Global Gauge Symmetries, Risk-Free Portfolios, and the Risk-Free Rate
Martin Gremm
We define risk-free portfolios using three gauge invariant differential operators that require such portfolios to be insensitive to price changes, to be self-financing, and to prod…
The Origin of Fat Tails
Martin Gremm
We propose a random walk model of asset returns where the parameters depend on market stress. Stress is measured by, e.g., the value of an implied volatility index. We show that mo…
Mathematical Constraints on Financially Viable Public Policy
Martin Gremm, Mark B. Wise
Social Security and other public policies can be viewed as a series of cash in and outflows that depend on parameters such as the age distribution of the population and the retirem…
Compactified NCOS and duality
Martin Gremm
We study four-dimensional U(1) on a non-commutative T^2 with rational Theta. This theory has dual descriptions as ordinary SYM or as NCOS. We identify a set of massive non-interact…
Thick domain walls and singular spaces
Martin Gremm
We discuss thick domain walls interpolating between spaces with naked singularities and give arguments based on the /CFT correspondence why such singularities may be physicall…
Four-dimensional gravity on a thick domain wall
Martin Gremm
We consider an especially simple version of a thick domain wall in space and investigate how four-dimensional gravity arises in this context. The model we consider has the ad…
Heterotic Little String Theories and Holography
Martin Gremm, Anton Kapustin
It has been conjectured that Little String Theories in six dimensions are holographic to critical string theory in a linear dilaton background. We test this conjecture for theories…
Mirror symmetry for N=1 QED in three dimensions
Martin Gremm, Emanuel Katz
We construct three-dimensional N=1 QED with N_f flavors using branes of type IIB string theory. This theory has a mirror, which can be realized using the S-dual brane configuration…
N=1 Theories, T-duality, and AdS/CFT correspondence
Martin Gremm, Anton Kapustin
We construct an N=1 superconformal field theory using branes of type IIA string theory. The IIA construction is related via T-duality to a IIB configuration with 3-branes in a back…
A note on brane boxes at finite string coupling
Eric G. Gimon, Martin Gremm
We consider N=1 supersymmetric SU(N_c) gauge theories, using the type IIB brane construction recently proposed by Hanany and Zaffaroni. At non-zero string coupling, we find that th…
Exact solutions for some N=2 supersymmetric SO(N) gauge theories with vectors and spinors
Mina Aganagic, Martin Gremm
We find exact solutions for N=2 supersymmetric SO(N), N=7,9,10,11,12 gauge theories with matter in the fundamental and spinor representation. These theories, with specific numbers…
The Coulomb branch of N=1 supersymmetric SU(N_c) x SU(N_c) gauge theories
Martin Gremm
We analyze the low energy behavior of N=1 supersymmetric gauge theories with SU(N_c) x SU(N_c) gauge group and a Landau-Ginzburg type superpotential. These theories contain fundame…
Annihilation of S-wave quarkonia and the measurement of alpha_s
Martin Gremm, Anton Kapustin
We analyze the relativistic corrections to annihilation rates of S-wave quarkonia within the framework of NRQCD. We show that order v^2 corrections can be expressed in terms of the…
Order alpha_s^2 beta_0 Correction to the Charged Lepton Spectrum in b \to c \ell \barν_\ell decays
Martin Gremm, Iain Stewart
We compute the α_s^2β_0 part of the two-loop QCD corrections to the charged lepton spectrum in b \to c \ell \barν_\ell decays and find them to be about 50\% of the first order corr…
Order 1/m_b^3 corrections to B\to X_c\ell\barνdecay and their implication for the measurement of \barΛand λ_1
Martin Gremm, Anton Kapustin
We compute the order 1/m_b^3 nonperturbative contributions to the inclusive differential B\to X_c\ell\barνdecay rate. They are parametrized by the expectation values of two local a…
Implications of the lepton spectrum for heavy quark physics
Martin Gremm, Anton Kapustin, Zoltan Ligeti +1
The shape of the lepton spectrum in inclusive semileptonic decay is sensitive to matrix elements of the heavy quark effective theory, and .…
Remarks on the Inclusive Decays and
M. Gremm, G. Köpp, F. Krüger +1
We consider the effects of quark-binding on the angular distribution and polarization characteristics of the inclusive decays and $Λ_b \to X_c l \bar{\n}_l$ $(l=e,…
Angular Distribution and Polarization of Photons in the Inclusive Decay
M. Gremm, F. Krüger, L. M. Sehgal
We study the angular distribution of photons produced in the inclusive decay of a polarized , , using the technique of Heavy Quark Effective Theory. Finite non-…
Tau Polarization in and
M. Gremm, G. Koepp, L. M. Sehgal
We discuss the longitudinal and transverse -polarization in inclusive decays of hadrons containing -quarks. The calculation is performed by means of an OPE in HQET. Some math…