Revised and Improved Value of the QED Tenth-Order Electron Anomalous Magnetic Moment

In order to improve the theoretical prediction of the electron anomalous magnetic moment $a_e$ we have carried out a new numerical evaluation of the 389 integrals of Set V, which represent 6,354 Feynman vertex diagrams without lepton loops. During this work, we found that one of the integrals, called $X024$, was given a wrong value in the previous calculation due to an incorrect assignment of integration variables. The correction of this error causes a shift of $-1.25$ to the Set~V contribution, and hence to the tenth-order universal (i.e., mass-independent) term $A_1^{(10)}$. The previous evaluation of all other 388 integrals is free from errors and consistent with the new evaluation. Combining the new and the old (excluding $X024$) calculations statistically, we obtain $7.606~(192) (\alpha/\pi)^5$ as the best estimate of the Set V contribution. Including the contribution of the diagrams with fermion loops, the improved tenth-order universal term becomes $A_1^{(10)}=6.678~(192)$. Adding hadronic and electroweak contributions leads to the theoretical prediction $a_e (\text{theory}) =1~159~652~182.032~(720)\times 10^{-12}$. From this and the best measurement of $a_e$, we obtain the inverse fine-structure constant $\alpha^{-1}(a_e) = 137.035~999~1491~(331)$. The theoretical prediction of the muon anomalous magnetic moment is also affected by the update of QED contribution and the new value of $\alpha$, but the shift is much smaller than the theoretical uncertainty.Comment: 32 pages, 1 figure, references adde

Spend-and-tax: a panel data investigation for the EU

Using bootstrap panel analysis, allowing for cross-country correlation, without the need of pre-testing for unit roots, we study the causality between government spending and revenue for the EU in the period 1960-2006. We find spend-and-tax causality for Italy, France, Spain, Greece, and Portugal, while tax-and-spend evidence is present for Germany, Belgium, Austria Finland and the UK, and for several EU New Member States. Moreover, in the run-up to EMU there was some shifting away from a spend-and-tax strategy, implying adjustments of fiscal behaviour.panel causality, fiscal policy, EU

Effect of Radiation Drag on Hoyle-Lyttleton Accretion

Hoyle-Lyttleton type accretion is investigated, by taking account of not only the effect of radiation pressure but the effect of radiation drag. We calculate the trajectories of particles for three cases: only the effect of gravity is considered (case A); the effect of radiation pressure is taken into account (case B); the effect of radiation drag as well as radiation pressure is taken into account (case C). The accretion radii for former two cases are $2GM/v_{\infty}^2$ for case A and $2GM(1-\Gamma)/v_{\infty}^2$ for case B, where M is the mass of the accreted object, $v_{\infty}$ the relative velocity, and Gamma the normalized luminosity of the accreted object. We found that the accretion radius for case C is in between those of cases A and B under the present approximation; i.e., the accretion radius decreases due to radiation pressure while it increases due to radiation drag. In addition, the accretion radius for case C becomes larger as the incident velocity becomes fast. The effect of radiation drag becomes more and more important when the velocity of the incident particle is comparable to the light speed.Comment: 11 pages, LaTeX with 6 eps figures, accepted by Publications of the Astronomical Society of Japa

Spend spend-and and-tax: a panel data investigation for the EU

Using bootstrap panel analysis, allowing for cross cross-country correlation, without the need of pre pre-testing for unit roots, we study the causality between government spending and revenue for the EU in the period 1960 1960-2006. We find spend spend-and and-tax causality for Italy, France, Spain, Greece, and Portugal, while tax tax-and and-spend evidence is present for Germany, Belgium, Austria Finland and the UK, and for several EU New Member States. Moreover, in the run run-up to EMU there was some shifting away from a spend spend-and and-tax strategy, implying adjustments of fiscal behaviour.fiscal sustainability, EU, causality tests

Should we care for structural breaks when assessing fiscal sustainability?

We apply recent panel cointegration methods to a structural equation between government expenditure and revenue. Allowing for multiple endogenous breaks and after computing appropriate bootstrap critical values, we conclude for fiscal sustainability in the overall EU15 panel.We apply recent panel cointegration methods to a structural equation between government expenditure and revenue. Allowing for multiple endogenous breaks and after computing appropriate bootstrap critical values, we conclude for fiscal sustainability in the overall EU15 panel.

Sectoral Business Cycle Synchronization in the European Union

This paper analyses sectoral business cycle synchronization in an enlarged European Union using annual data for the period 1980-2005. In particular, we try to identify which sector for each country is driving the aggregate output business cycle synchronization. Overall, the sectors that provide the most relevant contribution are Industry, Building and Construction, and Agriculture, Fishery and Forestry. In contrast, the Services sector, the largest one in terms of valued added share, shows a relative low business cycle synchronization and volatility, contributing only marginally to the aggregate output business cycle synchronization.

Drought Resistance Analysis of the North Sulawesi Local Rice Based on the Root Characters Nio Song Ai, Ludong Daniel Peter Mantilen

Rice is one of the important staple foods in Indonesia with carbohydrate as its major component. Rice germplasm is so diverse in Indonesia including in North Sulawesi Province, which has 4 local rice cultivars, i.e Superwin, Ombong, Temo and Burungan. Regarding with the food security program in this province as well as in Indonesia, a study was conducted to evaluate root characters (the number of adventitious roots, maximum root length, root dry mass, root:shoot ratio, the number of hardpan penetrated roots) as response to drought in these North-Sulawesi local rice cultivars grown in the soil mixture at the vegetative phase. The drought treatment consisted of three different intensities (watering until 100% field capacity/DA, watering until 50% field capacity/½TA and no watering/TA) for 2 weeks in the glasshouse experiment using polyvinyl chloride (PVC) pots with 125 mm height and 60 mm diameter. In general, the drought treatment decreased the number of adventitious roots, root dry mass, and root:shoot ratio The roots of Temo and Burungan were able to penetrate the hardpan (mixture of paraffin and vaseline that was equal to 12 bar hardness) under drought, but the capacities were low. Based on the root characters, Temo and Burungan had higher drought resistance than the other cultivars. The results of this research enriched the information of drought resistant rice selection that was easy, cheap and fast in the plant breeding program in North Sulawesi

Euler testing Ricardo and Barro in the EU

According to Keynesian economics wisdom, government debt has an effect on the economy since consumers see government debt as net wealth. However, according to the debt neutrality hypothesis of Ricardo (1817), popularised by Barro (1974), such effects would be absent. This paper's results, obtained from Euler equation estimations using a panel data approach, indicate that it would be wise to reject the debt neutrality hypothesis for the EU and that higher government indebtedness could actually deter private consumption.

Tenth-order lepton g-2: Contribution of some fourth-order radiative corrections to the sixth-order g-2 containing light-by-light-scattering subdiagrams

This paper reports the tenth-order QED contribution to lepton g-2 from diagrams of three gauge-invariant sets VI(d), VI(g), and VI(h), which are obtained by including various fourth-order radiative corrections to the sixth-order g-2 containing light-by-light-scattering subdiagrams. In the case of electron g-2, they consist of 492, 480, and 630 vertex Feynman diagrams, respectively. The results of numerical integration, including mass-dependent terms containing muon loops, are 1.8418(95) (alpha/pi)^5 for the Set VI(d), -1.5918(65) (alpha/pi)^5 for the Set VI(g), and 0.1797(40) (alpha/pi)^5 for the Set VI(h), respectively. We also report the contributions to the muon g-2, which derive from diagrams containing an electron, muon or tau lepton loop: Their sums are -5.876(802) (alpha/pi)^5 for the Set VI(d), 5.710(490) (alpha/pi)^5 for the Set VI(g), and -8.361(232) (alpha/pi)^5 for the Set VI(h), respectively.Comment: 17 pages, 5 figure