12,549 research outputs found

    What Causes the Volatility of the Balancing Item?

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    This paper analyzes the impacts of timing errors, capital flows and economic openness on the behavior of the balancing item. We choose Norway, Sweden, Philippines and South Africa as sample countries where the size of the balancing item is often excess the IMF's criterion of ‘smallness'. The empirical results show that the sources of the volatility of the balancing item are different among these four countries.Balancing item, Balance of payments

    Charm-strange baryon strong decays in a chiral quark model

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    The strong decays of charm-strange baryons up to N=2 shell are studied in a chiral quark model. The theoretical predictions for the well determined charm-strange baryons, Ξc(2645)\Xi_c^*(2645), Ξc(2790)\Xi_c(2790) and Ξc(2815)\Xi_c(2815), are in good agreement with the experimental data. This model is also extended to analyze the strong decays of the other newly observed charm-strange baryons Ξc(2930)\Xi_c(2930), Ξc(2980)\Xi_c(2980), Ξc(3055)\Xi_c(3055), Ξc(3080)\Xi_c(3080) and Ξc(3123)\Xi_c(3123). Our predictions are given as follows. (i) Ξc(2930)\Xi_c(2930) might be the first PP-wave excitation of Ξc\Xi_c' with JP=1/2J^P=1/2^-, favors the $|\Xi_c'\ ^2P_\lambda 1/2^->or or |\Xi_c'\ ^4P_\lambda 1/2^->state.(ii) state. (ii) \Xi_c(2980)mightcorrespondtotwooverlapping might correspond to two overlapping Pwavestates-wave states |\Xi_c'\ ^2P_\rho 1/2^->and and |\Xi_c'\ ^2P_\rho 3/2^->,respectively.The, respectively. The \Xi_c(2980)observedinthe observed in the \Lambda_c^+\bar{K}\pifinalstateismostlikelytobethe final state is most likely to be the |\Xi_c'\ ^2P_\rho 1/2^->state,whilethenarrowerresonancewithamass state, while the narrower resonance with a mass m\simeq 2.97GeVobservedinthe GeV observed in the \Xi_c^*(2645)\pichannelfavorstobeassignedtothe channel favors to be assigned to the |\Xi_c'\ ^2P_\rho 3/2^->state.(iii) state. (iii) \Xi_c(3080)favorstobeclassifiedasthe favors to be classified as the |\Xi_c\ S_{\rho\rho} 1/2^+>state,i.e.,thefirstradialexcitation(2S)of state, i.e., the first radial excitation (2S) of \Xi_c.(iv). (iv) \Xi_c(3055)ismostlikelytobethefirst is most likely to be the first Dwaveexcitationof-wave excitation of \Xi_cwith with J^P=3/2^+,favorsthe, favors the |\Xi_c\ ^2D_{\lambda\lambda} 3/2^+>state.(v) state. (v) \Xi_c(3123)mightbeassignedtothe might be assigned to the |\Xi_c'\ ^4D_{\lambda\lambda} 3/2^+>,, |\Xi_c'\ ^4D_{\lambda\lambda} 5/2^+>,or, or |\Xi_c\ ^2D_{\rho\rho} 5/2^+>state.Asabyproduct,wecalculatethestrongdecaysofthebottombaryons state. As a by-product, we calculate the strong decays of the bottom baryons \Sigma_b^{\pm},, \Sigma_b^{*\pm}and and \Xi_b^*$, which are in good agreement with the recent observations as well.Comment: 15 pages, 9 figure
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