Higher bottom and bottom-strange mesons

Motivated by the recent observation of the orbital excitation $B(5970)$ by CDF collaboration, we have performed a systematical study of the mass spectrum and strong decay patterns of the higher $B$ and $B_s$ mesons. Hopefully the present investigation may provide valuable clues to further experimental exploration of these intriguing excited heavy mesons.Comment: 13 pages, 11 figures, 10 tables. More discussions and references added. Accepted by Phys. Rev.

Charged bottomonium-like states Zb(10610)Z_b(10610) and Zb(10650)Z_b(10650) and the Υ(5S)→Υ(2S)π+π−\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^- decay

Inspired by the newly observed two charged bottomonium-like states, we consider the possible contribution from the intermediate $Z_b(10610)$ and $Z_b(10650)$ states to the $\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^-$ decay process, which naturally explains Belle's previous observation of the anomalous $\Upsilon(2S)\pi^+\pi^-$ production near the peak of $\Upsilon(5S)$ at $\sqrt s=10.87$ GeV [K.F. Chen {\it et al}. (Belle Collaboration), Phys. Rev. Lett. {\bf 100}, 112001 (2008)]. The resulting $d\Gamma(\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^-)/dm_{\pi^+\pi^-}$ and $d\Gamma(\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^-)/d\cos\theta$ distributions agree with Belle's measurement after inclusion of these $Z_b$ states. This formalism also reproduces the Belle observation of the double-peak structure and its reflection in $\Upsilon(2S)\pi^+$ invariant mass spectrum of $\Upsilon(5S)\to \Upsilon(2S)\pi^+\pi^-$ decay.Comment: 5 pages, 5 figures, 4 tables. More contents and discussions adde

1D to 3D Dimensional Crossover in the Superconducting Transition of the Quasi-One-Dimensional Carbide Superconductor Sc3CoC4

The transition metal carbide superconductor Sc3CoC4 may represent a new benchmark system of quasi-1D superconducting behavior. We investigate the superconducting transition of a high-quality single crystalline sample by electrical transport experiments. Our data show that the superconductor goes through a complex dimensional crossover below the onset Tc of 4.5 K. First, a quasi-1D fluctuating superconducting state with finite resistance forms in the CoC4 ribbons which are embedded in a Sc matrix in this material. At lower temperature, the transversal Josephson or proximity coupling of neighboring ribbons establishes a 3D bulk superconducting state. This dimensional crossover is very similar to Tl2Mo6Se6, which for a long time has been regarded as the most appropriate model system of a quasi-1D superconductor. Sc3CoC4 appears to be even more in the 1D limit than Tl2Mo6Se6

Estimator Meets Equilibrium Perspective: A Rectified Straight Through Estimator for Binary Neural Networks Training

Binarization of neural networks is a dominant paradigm in neural networks compression. The pioneering work BinaryConnect uses Straight Through Estimator (STE) to mimic the gradients of the sign function, but it also causes the crucial inconsistency problem. Most of the previous methods design different estimators instead of STE to mitigate it. However, they ignore the fact that when reducing the estimating error, the gradient stability will decrease concomitantly. These highly divergent gradients will harm the model training and increase the risk of gradient vanishing and gradient exploding. To fully take the gradient stability into consideration, we present a new perspective to the BNNs training, regarding it as the equilibrium between the estimating error and the gradient stability. In this view, we firstly design two indicators to quantitatively demonstrate the equilibrium phenomenon. In addition, in order to balance the estimating error and the gradient stability well, we revise the original straight through estimator and propose a power function based estimator, Rectified Straight Through Estimator (ReSTE for short). Comparing to other estimators, ReSTE is rational and capable of flexibly balancing the estimating error with the gradient stability. Extensive experiments on CIFAR-10 and ImageNet datasets show that ReSTE has excellent performance and surpasses the state-of-the-art methods without any auxiliary modules or losses.Comment: 10 pages, 6 figures. Accepted in ICCV 202

Career Goal Setting and Goal Pursuit in Young Adults: The Role of Financial Distress

Informed by goal-setting/self-regulatory theories, we tested the mediating role of career-related effort (i.e., goal striving) in the relationships between career-related indecision (i.e., goal ambiguity) and career-related stress (i.e., affect) and perceived employability (i.e., career-related attitude) and examined the effect of financial distress as a moderator in these direct and indirect relationships. Using a sample of 202 young adults (Mage ¼ 19.8 years, 81.7% female), we found career indecision was related negatively to effort and perceived employability and positively to stress, with effort mediating between indecision and both stress and perceived employability. However, financial distress influenced these relationships. The associations between career indecision and effort and perceived employability were more negative and the associations between career indecision and stress were more positive when financial distress was higher. The study contributes by identifying how financial distress affects the relationships between career indecision, effort, and other career variables

Career Goal Setting and Goal Pursuit in Young Adults: The Role of Financial Distress

Informed by goal-setting/self-regulatory theories, we tested the mediating role of career-related effort (i.e., goal striving) in the relationships between career-related indecision (i.e., goal ambiguity) and career-related stress (i.e., affect) and perceived employability (i.e., career-related attitude) and examined the effect of financial distress as a moderator in these direct and indirect relationships. Using a sample of 202 young adults (Mage 1⁄4 19.8 years, 81.7% female), we found career indecision was related negatively to effort and perceived employability and positively to stress, with effort mediating between indecision and both stress and perceived employability. However, financial distress influenced these relationships. The associations between career indecision and effort and perceived employability were more negative and the associations between career indecision and stress were more positive when financial distress was higher. The study contributes by identifying how financial distress affects the relationships between career indecision, effort, and other career variables. Keywords career goal setting, career self-regulation, career effort, career indecision, career stress, perceived employability, financial distress

Career Goal Setting and Goal Pursuit in Young Adults: The Role of Financial Distress

Informed by goal-setting/self-regulatory theories, we tested the mediating role of career-related effort (i.e., goal striving) in the relationships between career-related indecision (i.e., goal ambiguity) and career-related stress (i.e., affect) and perceived employability (i.e., career-related attitude) and examined the effect of financial distress as a moderator in these direct and indirect relationships. Using a sample of 202 young adults (Mage ¼ 19.8 years, 81.7% female), we found career indecision was related negatively to effort and perceived employability and positively to stress, with effort mediating between indecision and both stress and perceived employability. However, financial distress influenced these relationships. The associations between career indecision and effort and perceived employability were more negative and the associations between career indecision and stress were more positive when financial distress was higher. The study contributes by identifying how financial distress affects the relationships between career indecision, effort, and other career variable