Phenomenology of left-right symmetric dark matter

We present a detailed study of dark matter phenomenology in low-scale left-right symmetric models. Stability of new fermion or scalar multiplets is ensured by an accidental matter parity that survives the spontaneous symmetry breaking of the gauge group by scalar triplets. The relic abundance of these particles is set by gauge interactions and gives rise to dark matter candidates with masses above the electroweak scale. Dark matter annihilations are thus modified by the Sommerfeld effect, not only in the early Universe, but also today, for instance, in the Center of the Galaxy. Majorana candidates - triplet, quintuplet, bi-doublet, and bi-triplet - bring only one new parameter to the model, their mass, and are hence highly testable at colliders and through astrophysical observations. Scalar candidates - doublet and 7-plet, the latter being only stable at the renormalizable level - have additional scalar-scalar interactions that give rise to rich phenomenology. The particles under discussion share many features with the well-known candidates wino, Higgsino, inert doublet scalar, sneutrino, and Minimal Dark Matter. In particular, they all predict a large gamma-ray flux from dark matter annihilations, which can be searched for with Cherenkov telescopes. We furthermore discuss models with unequal left-right gauge couplings, $g_R \neq g_L$, taking the recent experimental hints for a charged gauge boson with 2 TeV mass as a benchmark point. In this case, the dark matter mass is determined by the observed relic density.Comment: 32 + 23 pages, 4.5 MB; Minor changes and additional comments. Matches published versio

Indirect searches of dark matter via polynomial spectral features

We derive the spectra arising from non-relativistic dark matter annihilations or decays into intermediary particles with arbitrary spin, which subsequently produce neutrinos or photons via two-body decays. Our approach is model independent and predicts spectral features restricted to a kinematic box. The overall shape within that box is a polynomial determined by the polarization of the decaying particle. We illustrate our findings with two examples. First, with the neutrino spectra arising from dark matter annihilations into the massive Standard Model gauge bosons. Second, with the gamma-ray and neutrino spectra generated by dark matter annihilations into hypothetical massive spin-2 particles. Our results are in particular applicable to the 750 GeV diphoton excess observed at the LHC if interpreted as a spin-0 or spin-2 particle coupled to dark matter. We also derive limits on the dark matter annihilation cross section into this resonance from the non-observation of the associated gamma-ray spectral features by the H.E.S.S. telescope.Comment: 19 pages, modified title, added references, minor changes. To appear in JCA

2A Delivery

For students who want or need to learn how to count in binary and hexadecimal, the 2A Delivery Android application is a teaching tool that will help students learn by playing a game. This game will simulate a career with a fictional delivery company and will encourage the dedication of the student with pay raises, bonuses for great work, upgrades to vehicles, and map expansions. Unlike the current educational games available on the market, our product will use a storyline that will boost learning and stimulate the mind by teaching how to convert between multiple number bases

Quantum phase transition between one-channel and two-channel Kondo polarons

For a mobile spin-1/2 impurity, coupled antiferromagnetically to a one-dimensional gas of fermions, perturbative ideas have been used to argue in favor of two-channel Kondo behavior of the impurity spin. Here we combine general considerations and extensive numerical simulations to show that the problem displays a novel quantum phase transition between two-channel and one-channel Kondo screening upon increasing the Kondo coupling. We construct a ground-state phase diagram and discuss the various non-trivial crossovers as well as possible experimental realizations.Comment: 5+4 pages, 5+3 fig

Quality Management and Improvement in the Spanish SME Food Industry: The Adoption of ISO 9000

This paper presents the results of a large-scale study in the Spanish F&DI aimed to identify the motivators, perceived costs, and benefits of implementing ISO 9000 standards. Results indicate the increasing importance of ISO 9000 standards as a strategic tool in the Spanish F&DI with an increasing number of F&D companies seeking ISO 9000 certification. Despite being a recent strategic option among Spanish F&D companies latest figures show a total of 1,754 firms being ISO 9000 certified (a significant increased from a total of 4 firms in 1993)ISO 9000 certification, food industry, Spain, performance, Agribusiness,

Propuesta metodológica para la evaluación de la calidad docente e investigadora: Planteamiento y experimentación

The purpose of this paper is to resume the main results yields by an larger research project concerning alternative methodologies to evaluate booth teach and research activities of universitary professors. With that goal, we present some alternatives rankings obtained through different weights applied to the same set of indicators and we pointed out that the final score depends deeply on the weight and indicators selected. Final conclusions deals with the need of links between ranking scopes and goals, and the weights and indicators selected.University teach and research, University Proffesor’ Ranking, Education quality indicators.

A Low-cost, Long-range, and Solar-based IoT Soil Quality Monitor

The project objective is to create a low-cost, long-range, and solar-based IoT soil quality monitoring system. The system must transmit packages of data gathered from separate nodes, consisting of two different types of sensors, to a centralized gateway receiver to be displayed to the user in an elegant and readable manner. The end goal of the project is to supplement produce grown by large agricultural bodies around the United States without the misuse of water resources. This report presents the need for this system, details the components of the system, and the rationale behind design choices. It serves as a comprehensive guide to all the work that has been completed, provides an outlook for future iterations, and demonstrates the viability of LoRa communication for low power packet sending in a rural environment