papers

Publications (138)

hep-th2021

Information Transfer with a Gravitating Bath

Hao Geng, Andreas Karch, Carlos Perez-Pardavila +4

Late-time dominance of entanglement islands plays a critical role in addressing the information paradox for black holes in AdS coupled to an asymptotic non-gravitational bath. A na…

astro-ph.GA2014

Dark Matter as a Trigger for Periodic Comet Impacts

Lisa Randall, Matthew Reece

Although statistical evidence is not overwhelming, possible support for an approximately 35 million year periodicity in the crater record on Earth could indicate a nonrandom underl…

hep-ph1995

Phenomenological Constraints on the Higgs as Pseudo-Goldstone Boson Mechanism in Supersymmetric GUT Theories

Csaba Csaki, Lisa Randall

There are few robust solutions to the doublet-triplet splitting problem in supersymmetric GUT theories. One of the more promising solutions is the Higgs as pseudo-Goldstone boson m…

hep-ph1998

CP Violating Lepton Asymmetries from B Decays and Their Implication for Supersymmetric Flavor Models

Lisa Randall, Shufang Su

The lepton and dilepton charge asymmetries from and are predicted to be small in the standard model, whereas new physics could increase their values significantly.…

hep-th1996

More Dynamical Supersymmetry Breaking

Csaba Csaki, Lisa Randall, Witold Skiba

In this paper we introduce a new class of theories which dynamically break supersymmetry based on the gauge group SU(n)xSU(3)xU(1) for even n. These theories are interesting in tha…

hep-ph2007

Two Higgs Models for Large Tan Beta and Heavy Second Higgs

Lisa Randall

We study two Higgs models for large and relatively large second Higgs mass. In this limit the second heavy Higgs should have small vev and therefore couples only weakly to…

hep-ph1993

The Rate for $B\bbar$ Production Accompanied by a Single Pion

Lisa Randall, Eric Sather

We study the rate for the production of , where the sign of the charged pion tags the flavor content of the neutral meson. We estimate this branching ratio, e…

hep-ph2011

On the Feasibility and Utility of ISR Tagging

David Krohn, Lisa Randall, Lian-Tao Wang

The production of new particles at a hadron collider like the LHC is always accompanied by QCD radiation attributable to the initial state (i.e. ISR). This tends to complicate anal…

hep-ph2007

Flavor from Minimal Flavor Violation & a Viable Randall-Sundrum Model

A. Liam Fitzpatrick, Gilad Perez, Lisa Randall

We present a variant of the warped extra dimension, Randall-Sundrum (RS), framework which is based on five dimensional (5D) minimal flavor violation (MFV), in which the only source…

hep-ph2009

TeV Scale Singlet Dark Matter

Eduardo Ponton, Lisa Randall

It is well known that stable weak scale particles are viable dark matter candidates since the annihilation cross section is naturally about the right magnitude to leave the correct…

hep-ph2011

Xogenesis

Matthew R. Buckley, Lisa Randall

We present a new paradigm for dark matter in which a dark matter asymmetry is established in the early universe that is then transferred to ordinary matter. We show this scenario c…

hep-th2022

Jackiw-Teitelboim Gravity from the Karch-Randall Braneworld

Hao Geng, Andreas Karch, Carlos Perez-Pardavila +4

In this letter, we show that Jackiw-Teitelboim (JT) gravity can be naturally realized in the Karch-Randall braneworld. Notably the role of the dilaton in JT gravity is played by th…

hep-ph1999

Discovering Supersymmetry at the Tevatron in Wino LSP Scenarios

Jonathan L. Feng, Takeo Moroi, Lisa Randall +2

In supersymmetric models, Winos, partners of the SU(2) gauge bosons, may be the lightest supersymmetric particles (LSPs). For generic parameters, charged and neutral Winos are high…

hep-ph1994

Solving the Cosmological Moduli Problem with Weak Scale Inflation

Lisa Randall, Scott Thomas

Many models of supersymmetry breaking involve particles with weak scale mass and Planck mass suppressed couplings. Coherent production of such particles in the early universe destr…

hep-th2025

Sequestered Conformal Anomaly Mediation (SCAM)

Michael Nee, Lisa Randall

Supersymmetric models in singular extra dimensional spaces feature prominently in many interesting phenomenological models, including those derived from string theory. In this pape…

astro-ph.CO2023

Savior Curvatons and Large non-Gaussianity

Jackie Lodman, Qianshu Lu, Lisa Randall

Curvatons are light (compared to the Hubble scale during inflation) spectator fields during inflation that potentially contribute to adiabatic curvature perturbations post-inflatio…

hep-ph1994

The R Axion From Dynamical Supersymmetry Breaking

Jonathan Bagger, Erich Poppitz, Lisa Randall

All generic, calculable models of dynamical supersymmetry breaking have a spontaneously broken symmetry and therefore contain an axion. We show that the axion is massive in…

astro-ph.CO2017

Dark Catalysis

Prateek Agrawal, Francis-Yan Cyr-Racine, Lisa Randall +1

Recently it was shown that dark matter with mass of order the weak scale can be charged under a new long-range force, decoupled from the Standard Model, with only weak constraints…

gr-qc2022

New Horizons for Fundamental Physics with LISA

K. G. Arun, Enis Belgacem, Robert Benkel +138

The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…

hep-ph1995

Destabilizing Divergences in Supergravity Theories at Two Loops

Jonathan Bagger, Erich Poppitz, Lisa Randall

We examine the stability of the mass hierarchy in hidden-sector supergravity theories. We show that a quadratically divergent tadpole can appear at two loops, even in minimal super…

hep-th2026

Seeing Page Curves and Islands with Blinders On

Hao Geng, Andreas Karch, Carlos Perez-Pardavila +3

This paper summarizes recent discussions of the Page curve and the information paradox, and responds to the reasoning and examples from arXiv:2506.04311. We review arguments demons…

hep-ph1997

Composite Intermediary and Mediator Models of Gauge-Mediated Supersymmetry Breaking

Csaba Csaki, Lisa Randall, Witold Skiba

We discuss gauge-mediated models which employ a tree-level mass term in the superpotential. We give explicit composite realizations in which the mass terms are not fundamental. Ins…

hep-ph2007

Gravitational Waves from Warped Spacetime

Lisa Randall, Geraldine Servant

We argue that the RSI model can provide a strong signature in gravitational waves. This signal is a relic stochastic background generated during the cosmological phase transition f…

hep-ph2014

Warped Dipole Completed, with a Tower of Higgs Bosons

Kaustubh Agashe, Aleksandr Azatov, Yanou Cui +2

In the context of warped extra-dimensional models which address both the Planck-weak- and flavor-hierarchies of the Standard Model (SM), it has been argued that certain observables…

hep-ph1992

Heavy Meson Hyperfine Splittings: A Puzzle for Heavy Quark Chiral Perturbation Theory

Lisa Randall, Eric Sather

We show that there is a large discrepancy between the expected light flavor dependence of the heavy pseudoscalar--vector mass splittings and the measured values. We demonstrate tha…

hep-ph2017

Point Sources from Dissipative Dark Matter

Prateek Agrawal, Lisa Randall

If a component of dark matter has dissipative interactions, it can cool to form compact astrophysical objects with higher density than that of conventional cold dark matter (sub)ha…

hep-ph1997

Comment on nonperturbative effects in

Zoltan Ligeti, Lisa Randall, Mark B. Wise

Uncertainties in the theoretical prediction for the inclusive decay rate are discussed. We emphasize that there is no operator product expansion for this process. None…

hep-th2017

Quasinormal ringing on the brane

Hyeyoun Chung, Lisa Randall, Maria J. Rodriguez +1

While the linear behavior of gravity in braneworld models is well understood, much less is known about full non-linear gravitational effects. Even when they agree at the linear lev…

hep-th2001

Localized Gravity in String Theory

Andreas Karch, Lisa Randall

We propose a string realization of the AdS4 brane in AdS5 that is known to localize gravity. Our theory is M D5 branes in the near horizon geometry of N D3 branes, where M and N ar…

hep-th2013

Decoupling of High Dimension Operators from the Low Energy Sector in Holographic Models

A. Liam Fitzpatrick, Jared Kaplan, Emanuel Katz +1

We study the decoupling of high dimension operators from the the description of the low-energy spectrum in theories where conformal symmetry is broken by a single scale, which we r…

gr-qc2018

An Analytical Portrait of Binary Mergers in Hierarchical Triple Systems

Lisa Randall, Zhong-Zhi Xianyu

With better statistics and precision, eccentricity could prove to be a useful tool for understanding the origin and environment of binary black holes. Hierarchical triples in parti…

hep-ph2012

A WIMPy Baryogenesis Miracle

Yanou Cui, Lisa Randall, Brian Shuve

We explore models in which weakly interacting massive particle (WIMP) dark matter annihilation is directly responsible for baryogenesis, thereby connecting dark matter with baryoge…

hep-th1999

The Shape of Gravity

Joseph Lykken, Lisa Randall

In a nontrivial background geometry with extra dimensions, gravitational effects will depend on the shape of the Kaluza-Klein excitations of the graviton. We investigate a consiste…

hep-th2001

Holographic Domains of Anti-de Sitter Space

Raphael Bousso, Lisa Randall

An AdS_4 brane embedded in AdS_5 exhibits the novel feature that a four-dimensional graviton is localized near the brane, but the majority of the infinite bulk away from the brane…

hep-th2003

Extranatural Inflation

Nima Arkani-Hamed, Hsin-Chia Cheng, Paolo Creminelli +1

We present a new model of inflation in which the inflaton is the extra component of a gauge field in a 5d theory compactified on a circle. The chief merit of this model is that the…

hep-ph1993

The ACCMM Model and the Heavy Quark Expansion

Csaba Csaki, Lisa Randall

The ACCMM model predicts the lepton spectrum from meson decay by assuming the meson disintegrates into a spectator quark of definite mass and momentum distribution and an off s…

hep-ph2008

Exotic Implications of Electron and Photon Final States

Lisa Randall, Mark B. Wise

New resonances with masses of order a few might be discovered at the LHC. We show that no resonance that couples to electrons only through Standard Model interactions c…

hep-ph2016

A Diphoton Resonance from Bulk RS

Csaba Csaki, Lisa Randall

Recent LHC data hinted at a 750 GeV mass resonance that decays into two photons. A significant feature of this resonance is that its decays to any other Standard Model particles wo…

astro-ph.HE2019

What we can learn from multi-band observations of black hole binaries

Curt Cutler, Emanuele Berti, Karan Jani +12

The LIGO/Virgo gravitational-wave (GW) interferometers have to-date detected ten merging black hole (BH) binaries, some with masses considerably larger than had been anticipated. S…

hep-ph1997

Unity of Supersymmetry Breaking Models

Robert G. Leigh, Lisa Randall, Riccardo Rattazzi

We examine the models with gauge group U(1)^{k-1}\times\prod_{i=1}^k SU(n_i), which are obtained from decomposing the supersymmetry breaking model of Affleck, Dine and Seiberg cont…

hep-th2003

Pseudonatural Inflation

Nima Arkani-Hamed, Hsin-Chia Cheng, Paolo Creminelli +1

We study how to obtain a sufficiently flat inflaton potential that is natural from the particle physics point of view. Supersymmetry, which is broken during inflation, cannot prote…

hep-ph2007

Black Holes and Quantum Gravity at the LHC

Patrick Meade, Lisa Randall

We argue that the highly studied black hole signatures based on thermal multiparticle final states are very unlikely and only occur in a very limited parameter regime if at all. Ho…

hep-ph1993

Constraints on a Massive Dirac Neutrino Model

Thomas Wynter, Lisa Randall

We examine constraints on a simple neutrino model in which there are three massless and three massive Dirac neutrinos and in which the left handed neutrinos are linear combinations…

hep-ph1994

The Inclusive Semileptonic Decay Lepton Spectrum from

Lisa Randall

In this talk, we review the QCD calculation of the lepton spectrum from inclusive semileptonic decay. We compare this prediction to that of the ACCMM model. This latter work wa…

hep-ph2010

Early (and Later) LHC Search Strategies for Broad Dimuon Resonances

Randall Kelley, Lisa Randall, Brian Shuve

Resonance searches generally focus on narrow states that would produce a sharp peak rising over background. Early LHC running will, however, be sensitive primarily to broad resonan…

hep-th2002

Quantum Field Theory and Unification in AdS5

Lisa Randall, Matthew D. Schwartz

We consider gauge bosons in the bulk of AdS5 in a two-brane theory that addresses the hierarchy problem. We show such a theory can be consistent with gauge coupling unification at…

hep-ph2011

Emergent Dark Matter, Baryon, and Lepton Numbers

Yanou Cui, Lisa Randall, Brian Shuve

We present a new mechanism for transferring a pre-existing lepton or baryon asymmetry to a dark matter asymmetry that relies on mass mixing which is dynamically induced in the earl…

hep-th1996

Holomorphic Anomalies and the Nonrenormalization Theorem

Erich Poppitz, Lisa Randall

It has been argued that the superpotential can be renormalized in the presence of massless particles. Possible implications which have been considered include the restoration of su…

hep-ph2009

Natural Neutrino Masses and Mixings from Warped Geometry

Gilad Perez, Lisa Randall

We demonstrate that flavor symmetries in warped geometry can provide a natural explanation for large mixing angles and economically explain the distinction between the quark and le…

hep-ph2017

Make Dark Matter Charged Again

Prateek Agrawal, Francis-Yan Cyr-Racine, Lisa Randall +1

We revisit constraints on dark matter that is charged under a gauge group in the dark sector, decoupled from Standard Model forces. We find that the strongest constraints in…

hep-th2026

Covariant Locally Localized Gravity and vDVZ Continuity

Hao Geng, Moritz Merz, Lisa Randall

The Karch-Randall braneworld concerns the physics of an AdS brane embedded in an ambient gravitational AdS spacetime. The gravitational theory induced on the AdS$_{d}…

gr-qc2024

Mass Beyond Measure: Eccentric Searches for Black Hole Populations

Nicholas DePorzio, Lisa Randall, Zhong-Zhi Xianyu

Stellar mass binary black holes of unknown formation mechanism have been observed, motivating new methods for distinguishing distinct black hole populations. This work explores how…

hep-th2005

Relaxing to Three Dimensions

Andreas Karch, Lisa Randall

We propose a new selection principle for distinguishing among possible vacua that we call the "relaxation principle". The idea is that the universe will naturally select among poss…

hep-ph1995

Could the Supersymmetric Higgs Particles Naturally be Pseudo-Goldstone Bosons?

Zurab Berezhiani, Csaba Csaki, Lisa Randall

The doublet-triplet splitting problem is perhaps the most problematic aspect of supersymmetric grand unified theories. It can be argued that the most natural reason for the Higgs d…

hep-th2020

The Boundaries of KKLT

Lisa Randall

We consider the conundrum of generating de Sitter space from higher-dimensional geometry, with particular attention to KKLT-type constructions arXiv:hep-th/0301240 and their 5d imp…

hep-ph1996

Vacuum Instability in Low-Energy Supersymmetry Breaking Models

Indranil Dasgupta, Bogdan A. Dobrescu, Lisa Randall

We show that for the simplest models of gauge mediated supersymmetry breaking, including all existing models, the true vacuum will not preserve QCD if it communicates supersymmetry…

hep-th1999

Out Of This World Supersymmetry Breaking

Lisa Randall, Raman Sundrum

We show that in a general hidden sector model, supersymmetry breaking necessarily generates at one-loop a scalar and gaugino mass as a consequence of the super-Weyl anomaly. We stu…

gr-qc2018

Induced Ellipticity for Inspiraling Binary Systems

Lisa Randall, Zhong-Zhi Xianyu

Although gravitational waves tend to erase eccentricity of an inspiraling binary system, ellipticity can be generated in the presence of surrounding matter. We present a semi-analy…

astro-ph.HE2019

Eccentricity Without Measuring Eccentricity: Discriminating Among Stellar Mass Black Hole Binary Formation Channels

Lisa Randall, Zhong-Zhi Xianyu

We show how the observable number of binaries in LISA is affected by eccentricity through its influence on the peak gravitational wave frequency, enhanced binary number density req…

hep-th2001

Open and Closed String Interpretation of SUSY CFT's on Branes with Boundaries

Andreas Karch, Lisa Randall

We consider certain supersymmetric configurations of intersecting branes and branes ending on branes and analyze the duality between their open and closed string interpretation. Th…

astro-ph.CO2013

Double-Disk Dark Matter

JiJi Fan, Andrey Katz, Lisa Randall +1

Based on observational constraints on large scale structure and halo structure, dark matter is generally taken to be cold and essentially collisionless. On the other hand, given th…

hep-ph2020

Searching for Dark Photon Dark Matter with Cosmic Ray Antideuterons

Lisa Randall, Weishuang Linda Xu

Low energy antideuteron detection presents a unique channel for indirect detection, targeting dark matter that annihilates into hadrons in a relatively background-free way. Since t…

hep-ph1993

The Rate for and its Implications for the Study of CP Violation, Identification, and the Study of Meson Chiral Perturbation Theory

Laurent Lellouch, Lisa Randall, Eric Sather

H.~Yamamoto has proposed employing mesons produced in conjunction with a single charged pion at an resonance for studies of CP violation in the neutral meson system at…

hep-ph1995

The '3-1' model: the minimal model of calculable dynamical sypersymmetry breaking

Erich Poppitz, Lisa Randall

paper is withdrawn - the model lacks a stable ground state

hep-ph1996

Supernatural Inflation

Lisa Randall, Marin Soljacic, Alan Guth

Most models of inflation have small parameters, either to guarantee sufficient inflation or the correct magnitude of the density perturbations. In this paper we show that, in super…

astro-ph.HE2019

Observing Eccentricity Oscillations of Binary Black Holes in LISA

Lisa Randall, Zhong-Zhi Xianyu

The tidal force from a third body near a binary system could introduce long-term oscillations in the binary's eccentricity, known as Kozai-Lidov oscillations. We show that the Koza…

hep-ph1999

A Large Mass Hierarchy from a Small Extra Dimension

Lisa Randall, Raman Sundrum

We propose a new higher-dimensional mechanism for solving the Hierarchy Problem. The Weak scale is generated from a large scale of order the Planck scale through an exponential hie…

astro-ph.GA2020

Testing CDM With Dwarf Galaxy Morphology

Weishuang Linda Xu, Lisa Randall

The leading tensions to the collisionless cold dark matter (CDM) paradigm are the "small-scale controversies", discrepancies between observations at the dwarf-galactic scale and th…

astro-ph.GA2016

Updated Kinematic Constraints on a Dark Disk

Eric David Kramer, Lisa Randall

We update the method of the Holmberg & Flynn (2000) study, including an updated model of the Milky Way's interstellar gas, radial velocities, an updated reddening map, and a carefu…

hep-ph1993

Naturally Large Tan

Ann E. Nelson, Lisa Randall

We show that if there are only two Higgs doublets in the supersymmetric standard model, large requires a fine tuning in the parameters of the Lagrangian of order ($1/\tanÎ…

hep-th2007

Sequestering CP Violation and GIM-Violation with Warped Extra Dimensions

Clifford Cheung, A. Liam Fitzpatrick, Lisa Randall

We propose a model of spontaneous CP violation to address the strong CP problem in warped extra dimensions that relies on sequestering flavor and CP violation. We assume that brane…

hep-ph2010

General Analysis of Antideuteron Searches for Dark Matter

Yanou Cui, John D. Mason, Lisa Randall

Low energy cosmic ray antideuterons provide a unique low background channel for indirect detection of dark matter. We compute the cosmic ray flux of antideuterons from hadronic ann…

hep-th2002

Entropy-Area Relations in Field Theory

Lisa Randall, Veronica Sanz, Matthew D. Schwartz

We consider the contribution to the entropy from fields in the background of a curved time-independent metric. To account for the curvature of space, we postulate a position-depend…

hep-th2002

Absence of a VVDZ Discontinuity in AdS_AdS

Andreas Karch, Emanuel Katz, Lisa Randall

We clarify the role of gauge invariance for the theory of an AdS4 brane embedded in AdS5. The presence of a nonvanishing mass parameter even for the lightest KK mode of the gravito…

hep-ph2007

The Bulk RS KK-gluon at the LHC

Ben Lillie, Lisa Randall, Lian-Tao Wang

We study the possibility of discovering and measuring the properties of the lightest Kaluza-Klein excitation of the gluon in a Randall-Sundrum scenario where the Standard Model mat…

hep-th2020

Geometries with mismatched branes

Andreas Karch, Lisa Randall

We study Randall-Sundrum two brane setups with mismatched brane tensions. For the vacuum solutions, boundary conditions demand that the induced metric on each of the branes is eith…

hep-ph1995

Baryogenesis from Flat Directions of the Supersymmetric Standard Model

Michael Dine, Lisa Randall, Scott Thomas

Baryogenesis from the coherent production of a scalar condensate along a flat direction of the supersymmetric extension of the standard model (Affleck-Dine mechanism) is investigat…

hep-th2006

On the existence and dynamics of braneworld black holes

A. Liam Fitzpatrick, Lisa Randall, Toby Wiseman

Based on holographic arguments Tanaka and Emparan et al have claimed that large localized static black holes do not exist in the one-brane Randall-Sundrum model. If such black hole…

hep-th2021

Entanglement Phase Structure of a Holographic BCFT in a Black Hole Background

Hao Geng, Andreas Karch, Carlos Perez-Pardavila +4

We compute holographic entanglement entropy for subregions of a BCFT thermal state living on a nongravitating black hole background. The system we consider is doubly holographic an…

hep-th2025

Holography and Causality in the Karch-Randall Braneworld

Hao Geng, Lisa Randall

It has been argued that the existence of a geodesic shortcut in the Karch-Randall (KR) braneworld rules out the possibility for a low-energy intermediate theory, even when gravity…

astro-ph.GA2016

Interstellar Gas and a Dark Disk

Eric David Kramer, Lisa Randall

We introduce a potentially powerful method for constraining or discovering a thin dark matter disk in the Milky Way. The method relies on the relationship between the midplane dens…

hep-ph2013

Exothermic Double-Disk Dark Matter

Matthew McCullough, Lisa Randall

If a subdominant component of dark matter (DM) interacts via long-range dark force carriers it may cool and collapse to form complex structures within the Milky Way galaxy, such as…

hep-ph1995

Flat Directions and Baryogenesis in Supersymmetric Theories

Lisa Randall

Flat directions are a generic feature of supersymmetric theories. They are of cosmological interest because they can lead to coherent production of scalars. In the early universe s…

hep-th1999

An Alternative to Compactification

Lisa Randall, Raman Sundrum

Conventional wisdom states that Newton's force law implies only four non-compact dimensions. We demonstrate that this is not necessarily true in the presence of a non-factorizable…

hep-ph2009

Candidates for Inelastic Dark Matter

Yanou Cui, David E. Morrissey, David Poland +1

Although we have yet to determine whether the DAMA data represents a true discovery of new physics, among such interpretations inelastic dark matter (IDM) can match the energy spec…

hep-ph2013

Single-Scale Natural SUSY

Lisa Randall, Matthew Reece

We consider the prospects for natural SUSY models consistent with current data. Recent constraints make the standard paradigm unnatural so we consider what could be a minimal exten…

hep-th2000

Holography and Phenomenology

Nima Arkani-Hamed, Massimo Porrati, Lisa Randall

We examine various aspects of the conjectured duality between warped AdS geometries with boundary branes and strongly coupled (broken) conformal field theories coupled to dynam…

hep-ph2022

TF08 Snowmass Report: BSM Model Building

Patrick J. Fox, Graham D. Kribs, Hitoshi Murayama +53

We summarize the state of Beyond the Standard Model (BSM) model building in particle physics for Snowmass 2021, focusing mainly on several whitepaper contributions to BSM model bui…

hep-th2022

Warped Compactifications in Particle Physics, Cosmology and Quantum Gravity

Prateek Agrawal, Cari Cesarotti, Andreas Karch +3

Particle physics has evolved in the past decade through evaluating the consequences of experimental measurements as well as exploiting theoretical tools that permit exploration of…

hep-ph1995

The Doublet-Triplet Splitting Problem and Higgses as Pseudogoldstone Bosons

Lisa Randall, Csaba Csa'ki

The doublet-triplet splitting problem is probably the most significant challenge to supersymmetric GUT theories. In this talk, we review potential solutions and their problematic a…

hep-ph2025

More Effective RS Field Theory

Severin Lüst, Michael Nee, Lisa Randall

In this paper we derive the effective theory for a stabilized five-dimensional warped geometry, addressing several outstanding issues in this derivation. These include allowing for…

hep-ph2012

Charming CP Violation and Dipole Operators from RS Flavor Anarchy

Cédric Delaunay, Jernej F. Kamenik, Gilad Perez +1

Recently the LHCb collaboration reported evidence for direct CP violation in charm decays. The value is sufficiently large that either substantially enhanced Standard Model contrib…

hep-ph1992

The QCD Scale in the Heavy Quark Expansion

Lisa Randall, Eric Sather

We argue that consistency of the combined heavy quark and chiral effective lagrangian requires the QCD scale which multiplies in the heavy quark expansion to be the chiral sy…

hep-th2009

Dynamical compactification from de Sitter space

Sean M. Carroll, Matthew C. Johnson, Lisa Randall

We show that D-dimensional de Sitter space is unstable to the nucleation of non-singular geometries containing spacetime regions with different numbers of macroscopic dimensions, l…

hep-th2004

A Dynamical Approach to the Cosmological Constant

Shinji Mukohyama, Lisa Randall

We consider a dynamical approach to the cosmological constant. There is a scalar field with a potential whose minimum occurs at a generic, but negative, value for the vacuum energy…

hep-ph2013

A Dark-Disk Universe

JiJi Fan, Andrey Katz, Lisa Randall +1

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 st…

hep-ph2009

Quark and Lepton Flavor Physics from F-Theory

Lisa Randall, David Simmons-Duffin

Recent work on local F-theory models shows the potential for new categories of flavor models. In this paper we investigate the perturbative effective theory interpretation of this…

hep-ph1999

Cosmology of Brane Models with Radion Stabilization

Csaba Csaki, Michael Graesser, Lisa Randall +1

We analyze the cosmology of the Randall-Sundrum model and that of compact brane models in general in the presence of a radius stabilization mechanism. We find that the expansion of…

hep-th2005

Discretizing Gravity in Warped Spacetime

Lisa Randall, Matthew D. Schwartz, Shiyamala Thambyahpillai

We investigate the discretized version of the compact Randall-Sundrum model. By studying the mass eigenstates of the lattice theory, we demonstrate that for warped space, unlike fo…

hep-ph1995

Supersymmetry Breaking in the Early Universe

Michael Dine, Lisa Randall, Scott Thomas

Supersymmetry breaking in the early universe induces scalar soft potentials with curvature of order the Hubble constant. This has a dramatic effect on the coherent production of sc…