pinecone/core-2020-05-10-deduplication huggingface dataset:
Extracting gluino endpoints with event topology patterns

In this paper we study the gluino dijet mass edge measurement at the LHC in a
realistic situation including both SUSY and combinatorical backgrounds together
with effects of initial and final state radiation as well as a finite detector
resolution. Three benchmark scenarios are examined in which the dominant SUSY
production process and also the decay modes are different. Several new
kinematical variables are proposed to minimize the impact of SUSY and
combinatorial backgrounds in the measurement. By selecting events with a
particular number of jets and leptons, we attempt to measure two distinct
gluino dijet mass edges originating from wino $\tilde g \to jj \tilde W$ and
bino $\tilde g \to jj \tilde B$ decay modes, separately. We determine the
endpoints of distributions of proposed and existing variables and show that
those two edges can be disentangled and measured within good accuracy,
irrespective of the presence of ISR, FSR, and detector effects.Comment: 20 pages, 7 figure
SL(2,Z) Action on AdS/BCFT and Hall Conductivities

We study the response of a conserved current to external electromagnetic
fields in a holographic system with boundaries using the recently proposed
AdS/BCFT (boundary conformal field theory) framework. This, in particular,
allows us to extract the Hall current, the Hall conductivity, plus some
potentially novel transport coefficients, and relations among them. We also
analyze the action of SL(2,Z) duality in the gravity bulk, which acts
non-trivially on the conductivity of the BCFT. Finally we consider a type IIA
string theory embedding of our setup.Comment: 26 pages, 1 figure; v2: references adde
Systematic study of the d=5 Weinberg operator at one-loop order

We perform a systematic study of the d = 5 Weinberg operator at the one-loop level. We identify three different categories of neutrino mass generation: (1) finite irreducible diagrams; (2) finite extensions of the usual seesaw mechanisms at one-loop and (3) divergent loop realizations of the seesaws. All radiative one-loop neutrino mass models must fall in to one of these classes. Case (1) gives the leading contribution to neutrino mass naturally and a classic example of this class is the Zee model. We demonstrate that in order to prevent that a tree level contribution dominates in case (2), Majorana fermions running in the loop and an additional Z(2) symmetry are needed for a genuinely leading one-loop contribution. In the type-II loop extensions, the Yukawa coupling will be generated at one loop, whereas the type-I/III extensions can be interpreted as loop-induced inverse or linear seesaw mechanisms. For the divergent diagrams in category (3), the tree level contribution cannot be avoided and is in fact needed as counter term to absorb the divergence
Spectrum from the warped compactifications with the de Sitter universe

We discuss the spectrum of the tensor metric perturbations and the stability
of warped compactifications with the de Sitter spacetime in the
higher-dimensional gravity. The spacetime structure is given in terms of the
warped product of the non-compact direction, the spherical internal dimensions
and the four-dimensional de Sitter spacetime. To realize a finite bulk volume,
we construct the brane world model, using the cut-copy-paste method. Then, we
compactify the spherical directions on the brane. In any case, we show the
existence of the massless zero mode and the mass gap of it with massive
Kaluza-Klein modes. Although the brane involves the spherical dimensions, no
light massive mode is excited. We also investigate the scalar perturbations,
and show that the model is unstable due to the existence of a tachyonic bound
state, which seems to have the universal negative mass square, irrespective of
the number of spacetime dimensions.Comment: Journal version (JHEP
Gravity and compactified branes in matrix models

A mechanism for emergent gravity on brane solutions in Yang-Mills matrix
models is exhibited. Newtonian gravity and a partial relation between the
Einstein tensor and the energy-momentum tensor can arise from the basic matrix
model action, without invoking an Einstein-Hilbert-type term. The key
requirements are compactified extra dimensions with extrinsic curvature M^4 x K
\subset R^D and split noncommutativity, with a Poisson tensor \theta^{ab}
linking the compact with the noncompact directions. The moduli of the
compactification provide the dominant degrees of freedom for gravity, which are
transmitted to the 4 noncompact directions via the Poisson tensor. The
effective Newton constant is determined by the scale of noncommutativity and
the compactification. This gravity theory is well suited for quantization, and
argued to be perturbatively finite for the IKKT model. Since no
compactification of the target space is needed, it might provide a way to avoid
the landscape problem in string theory.Comment: 35 pages. V2: substantially revised and improved, conclusion
  weakened. V3: some clarifications, published version. V4: minor correctio
Discovering the composite Higgs through the decay of a heavy fermion

A possible composite nature of the Higgs could be revealed at the early stage
of the LHC, by analyzing the channels where the Higgs is produced from the
decay of a heavy fermion. The Higgs production from a singly-produced heavy
bottom, in particular, proves to be a promising channel. For a value \lambda=3
of the Higgs coupling to a heavy bottom, for example, we find that, considering
a 125 GeV Higgs which decays into a pair of b-quarks, a discovery is possible
at the 8 TeV LHC with 30 fb^{-1} if the heavy bottom is lighter than roughly
530 GeV (while an observation is possible for heavy bottom masses up to 650
GeV). Such a relatively light heavy bottom is realistic in composite Higgs
models of the type considered and, up to now, experimentally allowed. At
\sqrt{s}=14 TeV the LHC sensitivity on the channel increases significantly.
With \lambda=3 a discovery can occur, with 100 fb^{-1}, for heavy bottom masses
up to 1040 GeV. In the case the heavy bottom was as light as 500 GeV, the 14
TeV LHC would be sensitive to the measure of the \lambda\ coupling in basically
the full range \lambda>1 predicted by the theory.Comment: 25 pp. v2: Minor changes. v3: Version accepted for publication in
  JHEP. v4: typos fixe
A note on amplitudes in N=6 superconformal Chern-Simons theory

We establish a connection between tree-level superamplitudes in ABJM theory
and leading singularities associated to special three-particle cuts of one-loop
superamplitudes where one of the tree amplitudes entering the cut is a
four-point amplitude. Using these relations, we show that certain intriguing
similarities between one-loop and tree-level superamplitudes observed recently
become completely manifest. This connection is reminiscent of a similar
relation in the maximally supersymmetric gauge theory in four dimensions, where
the sum of two-mass hard and one-mass box coefficients of a one-loop amplitude
equals the corresponding tree-level amplitude. As an application, we present a
very simple re-derivation of the six-point superamplitude and calculate the
eight-point superamplitude at one loop in ABJM theory.Comment: 28 pages, 7 figures. v3: JHEP versio
Supersymmetry in the shadow of photini

Additional neutral gauge fermions -- "photini" -- arise in string
compactifications as superpartners of U(1) gauge fields. Unlike their vector
counterparts, the photini can acquire weak-scale masses from soft SUSY breaking
and lead to observable signatures at the LHC through mass mixing with the bino.
In this work we investigate the collider consequences of adding photini to the
neutralino sector of the MSSM. Relatively large mixing of one or more photini
with the bino can lead to prompt decays of the lightest ordinary supersymmetric
particle; these extra cascades transfer most of the energy of SUSY decay chains
into Standard Model particles, diminishing the power of missing energy as an
experimental handle for signal discrimination. We demonstrate that the missing
energy in SUSY events with photini is reduced dramatically for supersymmetric
spectra with MSSM neutralinos near the weak scale, and study the effects on
limits set by the leading hadronic SUSY searches at ATLAS and CMS. We find that
in the presence of even one light photino the limits on squark masses from
hadronic searches can be reduced by 400 GeV, with comparable (though more
modest) reduction of gluino mass limits. We also consider potential discovery
channels such as dilepton and multilepton searches, which remain sensitive to
SUSY spectra with photini and can provide an unexpected route to the discovery
of supersymmetry. Although presented in the context of photini, our results
apply in general to theories in which additional light neutral fermions mix
with MSSM gauginos.Comment: 23 pages, 8 figures, references adde
Optical Conductivity with Holographic Lattices

We add a gravitational background lattice to the simplest holographic model
of matter at finite density and calculate the optical conductivity. With the
lattice, the zero frequency delta function found in previous calculations
(resulting from translation invariance) is broadened and the DC conductivity is
finite. The optical conductivity exhibits a Drude peak with a cross-over to
power-law behavior at higher frequencies. Surprisingly, these results bear a
strong resemblance to the properties of some of the cuprates.Comment: 22 pages, 10 figures. v2: typos fixed; slight variation in phase
  note
Quiver Invariants from Intrinsic Higgs States

In study of four-dimensional BPS states, quiver quantum mechanics plays a
central role. The Coulomb phases capture the multi-centered nature of such
states, and are well understood in the context of wall-crossing. The Higgs
phases are given typically by F-term-induced complete intersections in the
ambient D-term-induced toric varieties, and the ground states can be far more
numerous than the Coulomb phase counterparts. We observe that the Higgs phase
BPS states are naturally and geometrically grouped into two parts, with one
part given by the pulled-back cohomology from the D-term-induced ambient space.
We propose that these pulled-back states are in one-to-one correspondence with
the Coulomb phase states. This also leads us to conjecture that the index
associated with the rest, intrinsic to the Higgs phase,is a fundamental
invariant of quivers, independent of branches. For simple circular quivers,
these intrinsic Higgs states belong to the middle cohomology and thus are all
angular momentum singlets, supporting the single-center black hole
interpretation.Comment: 23 pages, 1 figure, 3 tables; references corrected, a new paragraph
  in section 4 to make angular momentum more explici
5d quivers and their AdS(6) duals

We consider an infinite class of 5d supersymmetric gauge theories involving
products of symplectic and unitary groups that arise from D4-branes at orbifold
singularities in Type I' string theory. The theories are argued to be dual to
warped AdS(6)x S4/Zn backgrounds in massive Type IIA supergravity. In
particular, this demonstrates the existence of supersymmetric 5d fixed points
of quiver type. We analyze the spectrum of gauge fields and charged states in
the supergravity dual, and find a precise agreement with the symmetries and
charged operators in the quiver theories. We also comment on other brane
objects in the supergravity dual and their interpretation in the field
theories.Comment: 29 pages, 15 figure
Deformations of Lifshitz Holography in $(n+1)$-dimensions

We investigate deformations of Lifshitz holography in $(n+1)$ dimensional
spacetime. After discussing the situation for general Lifshitz scaling symmetry
parameter $z$, we consider $z=n-1$ and the associated marginally relevant
operators. These operators are dynamically generated by a momentum scale
$\Lambda \sim 0$ and correspond to slightly deformed Lifshitz spacetimes via a
holographic picture. We obtain renormalization group flow at finite temperature
from UV Lifshitz to IR AdS, and evaluate how physical quantities such as the
free energy density and the energy density depend on $\log(\Lambda^z/T)$ in the
quantum critical regime as $\Lambda^z/T \rightarrow 0$.Comment: 27 pages, 10 figures with multiple plot
Holographic duals of Boundary CFTs

New families of regular half-BPS solutions to 6-dimensional Type 4b
supergravity with $m$ tensor multiplets are constructed exactly. Their
space-time consists of $AdS_2 \times S^2$ warped over a Riemann surface with an
arbitrary number of boundary components, and arbitrary genus. The solutions
have an arbitrary number of asymptotic $AdS_3 \times S^3$ regions. In addition
to strictly single-valued solutions to the supergravity equations whose scalars
live in the coset $SO(5,m)/SO(5)\times SO(m)$, we also construct stringy
solutions whose scalar fields are single-valued up to transformations under the
$U$-duality group $SO(5,m;\bZ)$, and live in the coset $SO(5,m;\bZ)\backslash
SO(5,m)/SO(5)\times SO(m)$. We argue that these Type 4b solutions are
holographically dual to general classes of interface and boundary CFTs arising
at the juncture of the end-points of 1+1-dimensional bulk CFTs. We evaluate
their corresponding holographic entanglement and boundary entropy, and discuss
their brane interpretation. We conjecture that the solutions for which $\Sigma$
has handles and multiple boundaries correspond to the near-horizon limit of
half-BPS webs of dyonic strings and three-branes.Comment: 60 pages, pdfLaTeX, 10 figure
Light scalars in strongly-coupled extra-dimensional theories

The low-energy dynamics of five-dimensional Yang-Mills theories compactified
on S^1 can be described by a four-dimensional gauge theory coupled to a scalar
field in the adjoint representation of the gauge group. Perturbative
calculations suggest that the mass of this elementary scalar field is protected
against power divergences, and is controlled by the size of the extra dimension
R. As a first step in the study of this phenomenon beyond perturbation theory,
we investigate the phase diagram of a SU(2) Yang-Mills theory in five
dimensions regularized on anisotropic lattices and we determine the ratios of
the relevant physical scales. The lattice system shows a dimensionally reduced
phase where the four-dimensional correlation length is much larger than the
size of the extra dimension, but still smaller than the four-dimensional
volume. In this region of the bare parameter space, at energies below 1/R, the
non-perturbative spectrum contains a \emph{light} scalar state. This state has
a mass that is independent of the cut-off, and a small overlap with glueball
operators. Our results suggest that light scalar fields can be introduced in a
lattice theory using compactified extra dimensions, rather than fine tuning the
bare mass parameter.Comment: 38 pages (7 pages of Appendix), 10 tables, 21 figures. Minor
  corrections. Version accepted for publication in JHE
Flavour physics from an approximate U(2)^3 symmetry

The quark sector of the Standard Model exhibits an approximate U(2)^3 flavour
symmetry. This symmetry, broken in specific directions dictated by minimality,
can explain the success of the Cabibbo-Kobayashi-Maskawa picture of flavour
mixing and CP violation, confirmed by the data so far, while allowing for
observable deviations from it, as expected in most models of ElectroWeak
Symmetry Breaking. Building on previous work in the specific context of
supersymmetry, we analyze the expected effects and we quantify the current
bounds in a general Effective Field Theory framework. As a further relevant
example we then show how the U(2)^3 symmetry and its breaking can be
implemented in a generic composite Higgs model and we make a first analysis of
its peculiar consequences. We also discuss how some partial extension of U(2)^3
to the lepton sector can arise, both in general and in composite Higgs models.
An optimistic though conceivable interpretation of the considerations developed
in this paper gives reasons to think that new physics searches in the flavour
sector may be about to explore an interesting realm of phenomena.Comment: 29 pages, 5 figure
Light dark matter and $Z'$ dark force at colliders

Light Dark Matter, $<10$ GeV, with sizable direct detection rate is an
interesting and less explored scenario. Collider searches can be very powerful,
such as through the channel in which a pair of dark matter particle are
produced in association with a jet. It is a generic possibility that the
mediator of the interaction between DM and the nucleus will also be accessible
at the Tevatron and the LHC. Therefore, collider search of the mediator can
provide a more comprehensive probe of the dark matter and its interactions. In
this article, to demonstrate the complementarity of these two approaches, we
focus on the possibility of the mediator being a new $U(1)'$ gauge boson, which
is probably the simplest model which allows a large direct detection cross
section for a light dark matter candidate. We combine searches in the
monojet+MET channel and dijet resonance search for the mediator. We find that
for the mass of $Z'$ between 250 GeV and 4 TeV, resonance searches at the
colliders provide stronger constraints on this model than the monojet+MET
searches.Comment: 23 pages and 14 figure
Supersymmetry breaking induced by radiative corrections

We show that simultaneous gauge and supersymmetry breaking can be induced by
radiative corrections, a la Coleman-Weinberg. When a certain correlation among
the superpotential parameters is present, a local supersymmetry-breaking
minimum is found in the effective potential of a gauge non-singlet field, in a
region where the tree-level potential is almost flat. Supersymmetry breaking is
then transmitted to the MSSM through gauge and chiral messenger loops, thus
avoiding the suppression of gaugino masses characteristic of direct gauge
mediation models. The use of a single field ensures that no dangerous tachyonic
scalar masses are generated at the one-loop level. We illustrate this mechanism
with an explicit example based on an SU(5) model with a single adjoint. An
interesting feature of the scenario is that the GUT scale is increased with
respect to standard unification, thus allowing for a larger colour Higgs
triplet mass, as preferred by the experimental lower bound on the proton
lifetime.Comment: 22 pages, 3 figures. Two references added, small redactional changes,
  some discussion improved. Results unchange
Holographic three-point functions for short operators

We consider holographic three-point functions for operators dual to short
string states at strong coupling in N=4 super Yang-Mills. We treat the states
as point-like as they come in from the boundary but as strings in the
interaction region in the bulk. The interaction position is determined by
saddle point, which is equivalent to conservation of the canonical momentum for
the interacting particles, and leads to conservation of their conformal
charges. We further show that for large dimensions the rms size of the
interaction region is small compared to the radius of curvature of the AdS
space, but still large compared to the string Compton wave-length. Hence, one
can approximate the string vertex operators as flat-space vertex operators with
a definite momentum, which depends on the conformal and R-charges of the
operator. We then argue that the string vertex operator dual to a primary
operator is chosen by satisfying a twisted version of Q^L=Q^R, up to spurious
terms. This leads to a unique choice for a scalar vertex operator with the
appropriate charges at the first massive level. We then comment on some
features of the corresponding three-point functions, including the application
of these results to Konishi operators.Comment: 24 pages; v2: References added, typos fixed, minor change
Soft branes in supersymmetry-breaking backgrounds

We revisit the analysis of effective field theories resulting from
non-supersymmetric perturbations to supersymmetric flux compactifications of
the type-IIB superstring with an eye towards those resulting from the
backreaction of a small number of anti-D3-branes. Independently of the
background, we show that the low-energy Lagrangian describing the fluctuations
of a stack of probe D3-branes exhibits soft supersymmetry breaking, despite
perturbations to marginal operators that were not fully considered in some
previous treatments. We take this as an indication that the breaking of
supersymmetry by anti-D3-branes or other sources may be spontaneous rather than
explicit. In support of this, we consider the action of an anti-D3-brane
probing an otherwise supersymmetric configuration and identify a candidate for
the corresponding goldstino.Comment: 36+5 pages. References added, minor typos correcte
Inclusive top-pair production phenomenology with TOPIXS

We discuss various aspects of inclusive top-quark pair production based on
TOPIXS, a new, flexible program that computes the production cross section at
the Tevatron and LHC at next-to-next-to-leading logarithmic accuracy in soft
and Coulomb resummation, including bound-state effects and the complete
next-to-next-to-leading order result in the q-qbar channel, which has recently
become available. We present the calculation of the top-pair cross section in
pp collisions at 8 TeV centre-of-mass energy, as well as the cross sections for
hypothetical heavy quarks in extensions of the standard model. The dependence
on the parton distribution input is studied. Further we investigate the impact
of LHC top cross section measurements at sqrt(s)=7 TeV on global fits of the
gluon distribution using the NNPDF re-weighting method.Comment: 27 pages, 5 figures; v2: corrected typos in Eqs. (2.8) and (6.2) and
  the text, added footnote on page 4, matches published versio
The Intermediate Scale MSSM, the Higgs Mass and F-theory Unification

Even if SUSY is not present at the Electro-Weak scale, string theory suggests
its presence at some scale M_{SS} below the string scale M_s to guarantee the
absence of tachyons. We explore the possible value of M_{SS} consistent with
gauge coupling unification and known sources of SUSY breaking in string theory.
Within F-theory SU(5) unification these two requirements fix M_{SS} ~ 5 x
10^{10} GeV at an intermediate scale and a unification scale M_c ~ 3 x 10^{14}
GeV. As a direct consequence one also predicts the vanishing of the quartic
Higgs SM self-coupling at M_{SS} ~10^{11} GeV. This is tantalizingly consistent
with recent LHC hints of a Higgs mass in the region 124-126 GeV. With such a
low unification scale M_c ~ 3 x 10^{14} GeV one may worry about too fast proton
decay via dimension 6 operators. However in the F-theory GUT context SU(5) is
broken to the SM via hypercharge flux. We show that this hypercharge flux
deforms the SM fermion wave functions leading to a suppression, avoiding in
this way the strong experimental proton decay constraints. In these
constructions there is generically an axion with a scale of size f_a ~
M_c/(4\pi)^2 ~ 10^{12} GeV which could solve the strong CP problem and provide
for the observed dark matter. The prize to pay for these attractive features is
to assume that the hierarchy problem is solved due to anthropic selection in a
string landscape.Comment: 48 pages, 8 figures. v3: further minor correction