pinecone/core-2020-05-10-deduplication huggingface dataset:
Axino dark matter with low reheating temperature

We examine axino dark matter in the regime of a low reheating temperature T_R
after inflation and taking into account that reheating is a non-instantaneous
process. This can have a significant effect on the dark matter abundance,
mainly due to entropy production in inflaton decays. We study both thermal and
non-thermal production of axinos in the context of the MSSM with ten free
parameters. We identify the ranges of the axino mass and the reheating
temperature allowed by the LHC and other particle physics data in different
models of axino interactions. We confront these limits with cosmological
constraints coming the observed dark matter density, large structures formation
and big bang nucleosynthesis. We find a number of differences in the
phenomenologically acceptable values of the axino mass and the reheating
temperature relative to previous studies. In particular, an upper bound on the
axino mass becomes dependent on T_R, reaching a maximum value at T_R~10^2 GeV.
If the lightest ordinary supersymmetric particle is a wino or a higgsino, we
obtain lower a limit of approximately 10 GeV for the reheating temperature. We
demonstrate also that entropy production during reheating affects the maximum
allowed axino mass and lowest values of the reheating temperature.Comment: v2: improved discussion of warm dark matter bounds, results for stau
  LOSP adde
Duality constructions from quantum state manifolds

The formalism of quantum state space geometry on manifolds of generalised
coherent states is proposed as a natural setting for the construction of
geometric dual descriptions of non-relativistic quantum systems. These state
manifolds are equipped with natural Riemannian and symplectic structures
derived from the Hilbert space inner product. This approach allows for the
systematic construction of geometries which reflect the dynamical symmetries of
the quantum system under consideration. We analyse here in detail the two
dimensional case and demonstrate how existing results in the AdS_2/CFT_1
context can be understood within this framework. We show how the radial/bulk
coordinate emerges as an energy scale associated with a regularisation
procedure and find that, under quite general conditions, these state manifolds
are asymptotically anti-de Sitter solutions of a class of classical dilaton
gravity models. For the model of conformal quantum mechanics proposed by de
Alfaro et. al. the corresponding state manifold is seen to be exactly AdS_2
with a scalar curvature determined by the representation of the symmetry
algebra. It is also shown that the dilaton field itself is given by the quantum
mechanical expectation values of the dynamical symmetry generators and as a
result exhibits dynamics equivalent to that of a conformal mechanical system.Comment: 25 Pages, References Adde
T-duality Twists and Asymmetric Orbifolds

We study some aspects of asymmetric orbifolds of tori, with the orbifold
group being some $\mathbb{Z}_N$ subgroup of the T-duality group and, in
particular, provide a concrete understanding of certain phase factors that may
accompany the T-duality operation on the stringy Hilbert space in toroidal
compactification. We discuss how these T-duality twist phase factors are
related to the symmetry and locality properties of the closed string vertex
operator algebra, and clarify the role that they enact in the modular
covariance of the orbifold theory, mainly using asymmetric orbifolds of tori
which are root lattices as working examples.Comment: 67 pages. v2: references added and typos correcte
Direct probes of flavor-changing neutral currents in $e^+e^-$ collisions

We propose a novel method to study flavor-changing neutral currents in the
$e^+e^-\to D^{*0}$ and $e^+e^-\to B_{s}^* $ transitions, tuning the energy of
$e^+e^-$- collisions to the mass of the narrow vector resonance $D^{*0}$ or $
B_{s}^*$. We present a thorough study of both short-distance and long-distance
contributions to $e^+e^-\to D^{*0}$ in the Standard Model and investigate
possible contributions of new physics in the charm sector. This process, albeit
very rare, has clear advantages with respect to the $D^0 \to e^+e^-$ decay: the
helicity suppression is absent, and a richer set of effective operators can be
probed. Implications of the same proposal for $B_{s}^*$ are also discussed.Comment: 24 pages, 2 figure
Baryogenesis in a CP invariant theory

We consider baryogenesis in a model which has a CP invariant Lagrangian, CP
invariant initial conditions and does not spontaneously break CP at any of the
minima. We utilize the fact that tunneling processes between CP invariant
minima can break CP to implement baryogenesis. CP invariance requires the
presence of two tunneling processes with opposite CP breaking phases and equal
probability of occurring. In order for the entire visible universe to see the
same CP violating phase, we consider a model where the field doing the
tunneling is the inflaton.Comment: 12 page
Fake gaps in AdS_3/CFT_2

We discuss properties of interpolating geometries in three dimensional
gravity in the presence of a chiral anomaly. This anomaly, which introduces an
unbalance between left and right central charges, is protected under RG flows.
For this simple reason it is impossible to gap a system with such an anomaly.
Our goal is to discuss how holography captures this basic and robust feature.
We demonstrate the absence of a mass gap by analysing the linearized spectrum
and holographic entanglement entropy of these backgrounds in the context of
AdS$_3$/CFT$_2$.Comment: 22 pages + Appendices, v2 bibliography fixed + references adde
Noncommutative spaces and matrix embeddings on flat R^{2n+1}

We conjecture an embedding operator which assigns, to any 2n+1 hermitian
matrices, a 2n-dimensional hypersurface in flat (2n + 1)-dimensional Euclidean
space. This corresponds to precisely defining a fuzzy D(2n)-brane corresponding
to N D0-branes. Points on the emergent hypersurface correspond to zero
eigenstates of the embedding operator, which have an interpretation as coherent
states underlying the emergent noncommutative geometry. Using this
correspondence, all physical properties of the emergent D(2n)-brane can be
computed. We apply our conjecture to noncommutative flat and spherical spaces.
As a by-product, we obtain a construction of a rotationally symmetric flat
noncommutative space in 4 dimensions.Comment: 14 pages, no figures. v2: added references and a clarificatio
Running of Radiative Neutrino Masses: The Scotogenic Model - REVISITED

A few years ago, it had been shown that effects stemming from renormalisation
group running can be quite large in the scotogenic model, where neutrinos
obtain their mass only via a 1-loop diagram (or, more generally, in many models
in which the light neutrino mass is generated via quantum corrections at
loop-level). We present a new computation of the renormalisation group
equations (RGEs) for the scotogenic model, thereby updating previous results.
We discuss the matching in detail, in particular in what regards the different
mass spectra possible for the new particles involved. We furthermore develop
approximate analytical solutions to the RGEs for an extensive list of
illustrative cases, covering all general tendencies that can appear in the
model. Comparing them with fully numerical solutions, we give a comprehensive
discussion of the running in the scotogenic model. Our approach is mainly
top-down, but we also discuss an attempt to get information on the values of
the fundamental parameters when inputting the low-energy measured quantities in
a bottom-up manner. This work serves the basis for a full parameter scan of the
model, thereby relating its low- and high-energy phenomenology, to fully
exploit the available information.Comment: 44 pages, 13 figures; continuation of 1205.0008 [hep-ph]; content
  matches published version; v3 corrected a minor typo in Eq. (25
Quartic AdS Interactions in Higher-Spin Gravity from Conformal Field
  Theory

Clarifying the locality properties of higher-spin gravity is a pressing task,
but notoriously difficult due to the absence of a weakly-coupled flat regime.
The simplest non-trivial case where this question can be addressed is the
quartic self-interaction of the AdS scalar field present in the higher-spin
multiplet. We investigate this issue in the context of the holographic duality
between the minimal bosonic higher-spin theory on AdS$_4$ and the free
$O\left(N\right)$ vector model in three dimensions. In particular, we determine
the exact explicit form of the derivative expansion of the bulk scalar quartic
vertex. The quartic vertex is obtained from the field theory four-point
function of the operator dual to the bulk scalar, by making use of our previous
results for the Witten diagrams of higher-spin exchanges. This is facilitated
by establishing the conformal block expansions of both the boundary four-point
function and the dual bulk Witten diagram amplitudes. We show that the vertex
we find satisfies a generalised notion of locality.Comment: 40 pages plus appendices, 8 figure
Colored HOMFLY and Generalized Mandelbrot set

Mandelbrot set is a closure of the set of zeroes of $resultant_x(F_n,F_m)$
for iterated maps $F_n(x)=f^{\circ n}(x)-x$ in the moduli space of maps $f(x)$.
The wonderful fact is that for a given $n$ all zeroes are not chaotically
scattered around the moduli space, but lie on smooth curves, with just a few
cusps, located at zeroes of $discriminant_x(F_n)$. We call this phenomenon the
Mandelbrot property. If approached by the cabling method, symmetrically-colored
HOMFLY polynomials $H^{\cal K}_n(A|q)$ can be considered as linear forms on the
$n$-th "power" of the knot ${\cal K}$, and one can wonder if zeroes of
$resultant_{q^2}(H_n,H_m)$ can also possess the Mandelbrot property. We present
and discuss such resultant-zeroes patterns in the complex-$A$ plane. Though $A$
is hardly an adequate parameter to describe the moduli space of knots, the
Mandelbrot-like structure is clearly seen -- in full accord with the vision of
arXiv:hep-th/0501235, that concrete slicing of the Universal Mandelbrot set is
not essential for revealing its structure.Comment: 16 page
The AdS(n) x S(n) x T(10-2n) BMN string at two loops

We calculate the two-loop correction to the dispersion relation for
worldsheet modes of the BMN string in AdS(n) x S(n) x T(10-2n) for n=2,3,5. For
the massive modes the result agrees with the exact dispersion relation derived
from symmetry considerations with no correction to the interpolating function
h. For the massless modes in AdS(3) x S(3) x T(4) however our result does not
match what one expects from the corresponding symmetry based analysis. We also
derive the S-matrix for massless modes up to the one-loop order. The scattering
phase is given by the massless limit of the Hernandez-Lopez phase. In addition
we compute a certain massless S-matrix element at two loops and show that it
vanishes suggesting that the two-loop phase in the massless sector is zero.Comment: 30 pages, 6 figures; v2: References and comment on type IIB added,
  acknowledgements updated; v3: Comparison to proposed exact massless S-matrix
  in sec 5.3 corrected. Only non-trivial phase appears at one loop. Additional
  minor clarification
Factorisation and holomorphic blocks in 4d

We study N=1 theories on Hermitian manifolds of the form M^4=S^1xM^3 with M^3
a U(1) fibration over S^2, and their 3d N=2 reductions. These manifolds admit
an Heegaard-like decomposition in solid tori D^2xT^2 and D^2xS^1. We prove that
when the 4d and 3d anomalies are cancelled the matrix integrands in the Coulomb
branch partition functions can be factorised in terms of 1-loop factors on
D^2xT^2 and D^2xS^1 respectively. By evaluating the Coulomb branch matrix
integrals we show that the 4d and 3d partition functions can be expressed as
sums of products of 4d and 3d holomorphic blocks.Comment: 57 page
Construction of 4d SYM compactified on open Riemann surfaces by the
  superfield formalism

By compactifying gauge theories on a lower dimensional manifold, we often
find many interesting relationships between a geometry and a supersymmetric
quantum field theory. In this paper we consider conformal field theories
obtained from twisted compactification on a Riemann surface with a boundary.
Various kinds of supersymmetric boundary conditions are exchanged under
S-duality. To consider these transformations one need to take into account
boundary degrees of freedom. So we study how the degrees of freedom can be
added at the boundary of the Riemann surface. In this paper I show that this
introduction of the boundary fields can be done preserving supersymmetry by
means of 2-dimensional superfields.Comment: 14 pages, some typos corrected and introduction is rewritten, the
  title and abstract were change
Einstein-Born-Infeld-Massive Gravity: adS-Black Hole Solutions and their
  Thermodynamical properties

In this paper, we study massive gravity in the presence of Born-Infeld
nonlinear electrodynamics. First, we obtain metric function related to this
gravity and investigate the geometry of the solutions and find that there is an
essential singularity at the origin ($r=0$). It will be shown that due to
contribution of the massive part, the number, types and places of horizons may
be changed. Next, we calculate the conserved and thermodynamic quantities and
check the validation of the first law of thermodynamics. We also investigate
thermal stability of these black holes in context of canonical ensemble. It
will be shown that number, type and place of phase transition points are
functions of different parameters which lead to dependency of stability
conditions to these parameters. Also, it will be shown how the behavior of
temperature is modified due to extension of massive gravity and strong
nonlinearity parameter. Next, critical behavior of the system in extended phase
space by considering cosmological constant as pressure is investigated. A study
regarding neutral Einstein-massive gravity in context of extended phase space
is done. Geometrical approach is employed to study the thermodynamical behavior
of the system in context of heat capacity and extended phase space. It will be
shown that GTs, heat capacity and extended phase space have consistent results.
Finally, critical behavior of the system is investigated through use of another
method. It will be pointed out that the results of this method is in agreement
with other methods and follow the concepts of ordinary thermodynamics.Comment: 19 pages with 17 figures, Sections V, VI, VII, VIII with related
  figures and discussions are added. arXiv admin note: text overlap with
  arXiv:1507.0656
Singlet-like Higgs bosons at present and future colliders

The presence of extra scalar singlets is a feature of several motivated
extensions of the Standard Model, and the mixing of such a singlet with the
Higgs boson is allowed to be quite large by current experiments. In this paper
we perform a thorough phenomenological study of this possibility. We consider
both direct and indirect searches, and we quantify the current constraints as
well as the prospects for future hadron and lepton machines - from the
forthcoming LHC run up to a futuristic 100 TeV proton-proton collider. The
direct reaches are obtained extrapolating the current limits with a technique
that we discuss and check with various tests. We find a strong complementarity
between direct and indirect searches, with the former dominating for lower
values of the singlet mass. We also find that the trilinear Higgs coupling can
have sizeable deviations from its Standard Model value, a fact for which we
provide an analytical understanding. The results are first presented in a
general scalar singlet extension of the Standard Model, taking advantage of the
very small number of parameters relevant for the phenomenology. Finally, we
specify the same analysis to a few most natural models, i.e. the
Next-to-Minimal Supersymmetric Standard Model, Twin Higgs and Composite Higgs.Comment: 30 pages, 12 figures, 2 tables. v2: discussion extended in sections 2
  and 5, references added, matches version published in JHE
Lattice study on QCD-like theory with exact center symmetry

We investigate QCD-like theory with exact center symmetry, with emphasis on
the finite-temperature phase transition concerning center and chiral
symmetries. On the lattice, we formulate center symmetric $SU(3)$ gauge theory
with three fundamental Wilson quarks by twisting quark boundary conditions in a
compact direction ($Z_3$-QCD model). We calculate the expectation value of
Polyakov loop and the chiral condensate as a function of temperature on 16^3 x
4 and 20^3 x 4 lattices along the line of constant physics realizing
$m_{PS}/m_{V}=0.70$. We find out the first-order center phase transition, where
the hysteresis of the magnitude of Polyakov loop exists depending on
thermalization processes. We show that chiral condensate decreases around the
critical temperature in a similar way to that of the standard three-flavor QCD,
as it has the hysteresis in the same range as that of Polyakov loop. We also
show that the flavor symmetry breaking due to the twisted boundary condition
gets qualitatively manifest in the high-temperature phase. These results are
consistent with the predictions based on the chiral effective model in the
literature. Our approach could provide novel insights to the nonperturbative
connection between the center and chiral properties.Comment: 25 pages, 6 figures, to apper in JHE
Null to time-like infinity Green's functions for asymptotic symmetries
  in Minkowski spacetime

We elaborate on the Green's functions that appeared in [1,2] when
generalizing, from massless to massive particles, various equivalences between
soft theorems and Ward identities of large gauge symmetries. We analyze these
Green's functions in considerable detail and show that they form a hierarchy of
functions which describe `boundary to bulk' propagators for large $U(1)$ gauge
parameters, supertranslations and sphere vector fields respectively. As a
consistency check we verify that the Green's functions associated to the large
diffeomorphisms map the Poincare group at null infinity to the Poincare group
at time-like infinity.Comment: 16 page
A symplectic rearrangement of the four dimensional non-geometric scalar
  potential

We present a symplectic rearrangement of the effective four-dimensional
non-geometric scalar potential resulting from type IIB superstring
compactification on Calabi Yau orientifolds. The strategy has two main steps.
In the first step, we rewrite the four dimensional scalar potential utilizing
some interesting flux combinations which we call new generalized flux orbits.
After invoking a couple of non-trivial symplectic relations, in the second
step, we further rearrange all the pieces of scalar potential into a completely
`symplectic-formulation' which involves only the symplectic ingredients (such
as period matrix etc.) without the need of knowing Calabi Yau metric. Moreover,
the scalar potential under consideration is induced by a generic tree level
K\"{a}hler potential and (non-geometric) flux superpotential for arbitrary
numbers of complex structure moduli, K\"ahler moduli and odd-axions. Finally,
we exemplify our symplectic formulation for the two well known toroidal
examples based on type IIB superstring compactification on ${\mathbb
T}^6/{({\mathbb Z}_2 \times {\mathbb Z}_2)}$-orientifold and ${\mathbb
T}^6/{{\mathbb Z}_4}$-orientifold.Comment: version 3: 43 pages, some improvements, to appear in JHE
On the reduction of 4d N=1 theories on S^2

We discuss reductions of general N=1 four dimensional gauge theories on S^2.
The effective two dimensional theory one obtains depends on the details of the
coupling of the theory to background fields, which can be translated to a
choice of R-symmetry. We argue that, for special choices of R-symmetry, the
resulting two dimensional theory has a natural interpretation as an N=(0,2)
gauge theory. As an application of our general observations, we discuss
reductions of N=1 and N=2 dualities and argue that they imply certain two
dimensional dualities
Stringy Horizons and UV/IR Mixing

The target-space interpretation of the exact (in $\alpha'$) reflection
coefficient for scattering from Euclidean black-hole horizons in classical
string theory is studied. For concreteness, we focus on the solvable $SL(2,
\mathbb{R})_k/U(1)$ black hole. It is shown that it exhibits a fascinating
UV/IR mixing, dramatically modifying the late-time behavior of general
relativity. We speculate that this might play an important role in the
black-hole information puzzle, as well as in clarifying features related with
the non-locality of Little String Theory
$K\to\pi\nu\bar\nu$ and $\epsilon'/\epsilon$ in Simplified New Physics
  Models

The decays $K^+\to\pi^+\nu\bar\nu$ and $K_L\to\pi^0\nu\bar\nu$, being the
theoretically cleanest rare decays of mesons, are very sensitive probes of New
Physics. In view of the excellent prospects of reaching the Standard Model
sensitivity for $K^+\to\pi^+\nu\bar\nu$ by the NA62 experiment at CERN and for
$K_L\to\pi^0\nu\bar\nu$ by the KOTO experiment at J-PARC, we study them in the
simplest extensions of the SM in which stringent correlations between these two
decays and other flavour observables are present. We first consider simple
models with tree-level Z and Z' contributions in which either MFV or a $U(2)^3$
symmetry is imposed on the quark flavour-violating couplings. We then compare
the resulting correlations with those present in generic models in which the
latter couplings are arbitrary, subject to constraints from $\Delta F=2$
processes, electroweak and collider data. Of particular interest are the
correlations with $\epsilon'/\epsilon$ and $K_L\to\mu^+\mu^-$ which limit the
size of NP contributions to $K^+\to\pi^+\nu\bar\nu$ and
$K_L\to\pi^0\nu\bar\nu$, depending on the Dirac structure of couplings and the
relevant operators. But in MFV also the constraint from $B_s\to\mu^+\mu^-$
turns out to be important. We take into account the recent results from lattice
QCD and large N approach that indicate $\epsilon'/\epsilon$ in the SM to be
significantly below the data. While in many models the enhancement of
$\epsilon'/\epsilon$ implies a suppression of $K_L\to\pi^0\nu\bar\nu$, we
present two models in which these observables can be simultaneously enhanced
relative to SM predictions. A correlation between $K^+\to\pi^+\nu\bar\nu$ and
$B\to K(K^*)\mu^+\mu^-$, found by us in the simple models considered here,
should be of interest for NA62 and LHCb experimentalists at CERN in the coming
years. The one with $B\to K(K^*)\nu\bar\nu$ will be tested at Belle II.Comment: 32 pages, 6 figures, 1 table. v2: updated analysis in section 4,
  matches version published in JHE
The Quasi-normal Modes of Charged Scalar Fields in Kerr-Newman black
  hole and Its Geometric Interpretation

It is well-known that there is a geometric correspondence between
high-frequency quasi-normal modes (QNMs) and null geodesics (spherical photon
orbits). In this paper, we generalize such correspondence to charged scalar
field in Kerr-Newman space-time. In our case, the particle and black hole are
all charged, so one should consider non-geodesic orbits. Using the WKB
approximation, we find that the real part of quasi-normal frequency corresponds
to the orbits frequency, the imaginary part of the frequency corresponds to the
Lyapunov exponent of these orbits and the eigenvalue of angular equation
corresponds to carter constant. From the properties of the imaginary part of
quasi-normal frequency of charged massless scalar field, we can still find that
the QNMs of charged massless scalar field possess the zero damping modes in
extreme Kerr-Newman spacetime under certain condition which has been fixed in
this paper.Comment: 30 pages, many figures, to appear in JHE