318 research outputs found
Oscillating Asymmetric Sneutrino Dark Matter from the Maximally Supersymmetric Inverse Seesaw
The inverse seesaw mechanism provides an attractive approach to generate
small neutrino mass, which origins from a tiny breaking. In this
paper, we work in the supersymmetric version of this mechanism, where the
singlet-like sneutrino could be an asymmetric dark matter (ADM) candidate in
the maximally symmetric limit. However, even a tiny , the
mass splitting between sneutrino and anti-sneutrino as a result of the tiny
breaking effect, could lead to fast oscillation between sneutrino
and anti-sneutrino and thus spoils the ADM scenario. We study the evolution of
this oscillation and find that a weak scale sneutrino, which tolerates a
relatively larger eV, is strongly favored. We also
investigate possible natural ways to realize that small in the
model.Comment: PLB versio
Glueball relevant study on isoscalars from lattice QCD
We perform a glueball-relevant study on isoscalars based on anisotropic
lattice QCD gauge configurations. In the scalar channel, we identify
the ground state obtained through gluonic operators to be a single-particle
state through its dispersion relation. When operator is included, we
find the mass of this state does not change, and the operator
couples very weakly to this state. So this state is most likely a glueball
state. For pseudoscalars, along with the exiting lattice results, our study
implies that both the conventional state (or in
flavor ) and a heavier glueball-like state with a mass of roughly 2.6
GeV exist in the spectrum of lattice QCD with dynamical quarks.Comment: 8 pages, 3 figures, 3 tables, talk presented at the 35th
International Symposium on Lattice Field Theory, 18-24 June 2017, Granada,
Spai
Anatomy of the resonance from lattice QCD at the physical point
We propose a strategy to access the component of the
resonance in lattice QCD. Through a mixed action formalism (overlap valence on
domain wall sea), the energy of the component is derived at
different valence quark masses, and shows a linear dependence on . The
slope is determined to be , from which the
valence sigma term is extracted to be MeV using the Feynman-Hellman theorem. At the physical pion
mass, the mass of the component is interpolated to be
MeV, which is close to the resonance mass.
We also obtain the leptonic decay constant of the component to be
MeV, which can be compared with the
experimental value MeV through the relation
with being
the on-shell wavefunction renormalization of owing to the
interaction. We emphasize that and of the
component, which are obtained for the first time from QCD, can be taken as the
input parameters of in effective field theory studies where acts
as a fundamental degree of freedom.Comment: 7 pages, 4 figures. Considerably modified, more discussions, matching
to the published versio
Diquark mass differences from unquenched lattice QCD
We calculate diquark correlation functions in the Landau gauge on the lattice
using overlap valence quarks and 2+1-flavor domain wall fermion configurations.
Quark masses are extracted from the scalar part of quark propagators in the
Landau gauge. Scalar diquark quark mass difference and axial vector scalar
diquark mass difference are obtained for diquarks composed of two light quarks
and of a strange and a light quark. Light sea quark mass dependence of the
results is examined. Two lattice spacings are used to check the discretization
effects. The coarse and fine lattices are of sizes and
with inverse spacings and , respectively.Comment: 9 figure
Unleashing the potential of prompt engineering in Large Language Models: a comprehensive review
This paper delves into the pivotal role of prompt engineering in unleashing
the capabilities of Large Language Models (LLMs). Prompt engineering is the
process of structuring input text for LLMs and is a technique integral to
optimizing the efficacy of LLMs. This survey elucidates foundational principles
of prompt engineering, such as role-prompting, one-shot, and few-shot
prompting, as well as more advanced methodologies such as the chain-of-thought
and tree-of-thoughts prompting. The paper sheds light on how external
assistance in the form of plugins can assist in this task, and reduce machine
hallucination by retrieving external knowledge. We subsequently delineate
prospective directions in prompt engineering research, emphasizing the need for
a deeper understanding of structures and the role of agents in Artificial
Intelligence-Generated Content (AIGC) tools. We discuss how to assess the
efficacy of prompt methods from different perspectives and using different
methods. Finally, we gather information about the application of prompt
engineering in such fields as education and programming, showing its
transformative potential. This comprehensive survey aims to serve as a friendly
guide for anyone venturing through the big world of LLMs and prompt
engineering
Proton Mass Decomposition from the QCD Energy Momentum Tensor
We report results on the proton mass decomposition and also on related quark
and glue momentum fractions. The results are based on overlap valence fermions
on four ensembles of DWF configurations with three lattice spacings
and three volumes, and several pion masses including the physical pion mass.
With fully non-perturbative renormalization (and universal normalization on
both quark and gluon), we find that the quark energy and glue field energy
contribute 33(4)(4)\% and 37(5)(4)\% respectively in the scheme
at GeV. A quarter of the trace anomaly gives a 23(1)(1)\%
contribution to the proton mass based on the sum rule, given 9(2)(1)\%
contribution from the and quark scalar condensates. The and
glue momentum fractions in the scheme are in good agreement
with global analyses at GeV.Comment: 10 pages, 6 figure
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