5,145 research outputs found
Gauge Model with Residual Symmetry
We study a gauge extension of the standard model of quarks and leptons
with unconventional charges for the singlet right-handed neutrinos, and extra
singlet scalars, such that a residual symmetry remains after the
spontaneous breaking of . We discuss the phenomenological consequences of
this scenario, including the possibility of long-lived self-interacting dark
matter and collider signatures.Comment: 11 pages, 2 figures, references added, fig.1 correcte
Dark Revelations of the and Gauge Extensions of the Standard Model
Two theoretically well-motivated gauge extensions of the standard model are
and , where is the same as and
is its color leptonic counterpart. Each as three variations, according to how
is broken. It is shown here for the first time that a built-in dark
gauge symmetry exists in all six versions, and may be broken to
discrete dark parity. The available dark matter candidates in each case
include fermions, scalars, as well as {\it vector gauge bosons}. This work
points to the unity of matter with dark matter, the origin of which is not {\it
ad hoc}.Comment: 12 pages, no figur
Alternative Model of Leptonic Color and Dark Matter
The alternative model of leptonic color and dark matter is
discussed. It unifies at GeV and has the low-energy subgroup
with
instead of as doublets under . It has the built-in
global dark symmetry which is generalized . In analogy to
quark triplets, it has hemion doublets which have half-integral
charges and are confined by gauge bosons (stickons). In analogy to
quarkonia, their vector bound states (hemionia) are uniquely suited for
exploration at a future collider.Comment: 23 pages, 2 figures, 2 tables. arXiv admin note: text overlap with
arXiv:1701.0704
Revisit Sparse Polynomial Interpolation based on Randomized Kronecker Substitution
In this paper, a new reduction based interpolation algorithm for black-box
multivariate polynomials over finite fields is given. The method is based on
two main ingredients. A new Monte Carlo method is given to reduce black-box
multivariate polynomial interpolation to black-box univariate polynomial
interpolation over any ring. The reduction algorithm leads to multivariate
interpolation algorithms with better or the same complexities most cases when
combining with various univariate interpolation algorithms. We also propose a
modified univariate Ben-or and Tiwarri algorithm over the finite field, which
has better total complexity than the Lagrange interpolation algorithm.
Combining our reduction method and the modified univariate Ben-or and Tiwarri
algorithm, we give a Monte Carlo multivariate interpolation algorithm, which
has better total complexity in most cases for sparse interpolation of black-box
polynomial over finite fields
Quantum resource estimates for computing elliptic curve discrete logarithms
We give precise quantum resource estimates for Shor's algorithm to compute
discrete logarithms on elliptic curves over prime fields. The estimates are
derived from a simulation of a Toffoli gate network for controlled elliptic
curve point addition, implemented within the framework of the quantum computing
software tool suite LIQ. We determine circuit implementations for
reversible modular arithmetic, including modular addition, multiplication and
inversion, as well as reversible elliptic curve point addition. We conclude
that elliptic curve discrete logarithms on an elliptic curve defined over an
-bit prime field can be computed on a quantum computer with at most qubits using a quantum circuit of at most Toffoli gates. We are able to classically simulate the
Toffoli networks corresponding to the controlled elliptic curve point addition
as the core piece of Shor's algorithm for the NIST standard curves P-192,
P-224, P-256, P-384 and P-521. Our approach allows gate-level comparisons to
recent resource estimates for Shor's factoring algorithm. The results also
support estimates given earlier by Proos and Zalka and indicate that, for
current parameters at comparable classical security levels, the number of
qubits required to tackle elliptic curves is less than for attacking RSA,
suggesting that indeed ECC is an easier target than RSA.Comment: 24 pages, 2 tables, 11 figures. v2: typos fixed and reference added.
ASIACRYPT 201
Glioblastoma stem cells induce quiescence in surrounding neural stem cells via Notch signalling.
There is increasing evidence demonstrating that adult neural stem cells (NSCs) are a cell of origin of glioblastoma. Here we analyzed the interaction between transformed and wild-type NSCs isolated from the adult mouse subventricular zone niche. We found that transformed NSCs are refractory to quiescence-inducing signals. Unexpectedly, we also demonstrated that these cells induce quiescence in surrounding wild-type NSCs in a cell–cell contact and Notch signaling-dependent manner. Our findings therefore suggest that oncogenic mutations are propagated in the stem cell niche not just through cell-intrinsic advantages, but also by outcompeting neighboring stem cells through repression of their proliferation
The production and composition of Chinese lead-barium glass through experimental laboratory replication
Lead-barium glass appeared during the late Warring States period in China (457 -221 BCE) and was considered as a Chinese invention due to the unique presence of high barium. There is no indication as to how it was made. A set of twenty-four different combinations of possible raw materials were melted to test and systematically evaluate the possible recipes for lead-barium glass. Specifically, the function and source of sodium in lead -barium glass were explored. The results show that sodium source is crucial for lead-barium glass forming in this particular system. This paper explores an alternative formulation since sodium flux is not reported in historical Chinese sources, in which the Na2O is provided by including soda-lime glass in the mixture. This particular formulation provides a potential explanation for the source of the sodium in lead-barium glass.Material Culture Studie
The production and composition of Chinese lead-barium glass through experimental laboratory replication
Lead-barium glass appeared during the late Warring States period in China (457 - 221 BCE) and was considered as a Chinese invention due to the unique presence of high barium. There is no indication as to how it was made. A set of twenty-four different combinations of possible raw materials were melted to test and systematically evaluate the possible recipes for lead-barium glass. Specifically, the function and source of sodium in lead-barium glass were explored. The results show that sodium source is crucial for lead-barium glass forming in this particular system. This paper explores an alternative formulation since sodium flux is not reported in historical Chinese sources, in which the Na2O is provided by including soda-lime glass in the mixture. This particular formulation provides a potential explanation for the source of the sodium in lead-barium glas
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