Higher Twist Effects in Photon-Photon Collisions

In this article, we investigate the contribution of the high twist Feynman diagrams to the large $p_{T}$ single pseudoscalar and vector mesons inclusive production cross section in two-photon collisions and we present the general formulae for the high and leading twist differential cross sections. The pion wave function where two non-trivial Gegenbauer coefficients $a_2$ and $a_4$ have been extracted from the CLEO data, Braun-Filyanov pion wave function, the asymptotic and the Chernyak-Zhitnitsky wave functions are used in the calculations. For $\rho$-meson we used Ball-Braun wave function. The results of all the calculations reveal that the high twist cross sections, the ratio R, the dependence transverse momentum $p_{T}$ and the rapidity $y$ of meson in $\Phi_{CLEO}(x,Q^2)$ wave function case is very close to the $\Phi_{asy}(x)$ asymptotic wave function case. It is shown that the high twist contribution to the cross section depends on the choice of the meson wave functions.Comment: REVTEX4, 23 pages, 7 figure

Exchange Return Co-movements and Volatility Spillovers Before and After the

This paper examines co-movements and volatility spillovers in the returns of the euro, the British pound, the Swiss franc and the Japanese yen vis-à-vis th

W. Douglas Hazard and the Newport Herald, 1907-1945

The late nineteenth century introduced the Gilded Age and robust party politics into the City by the Sea. The Newport Herald, established in 1892, was able to bridge these very different worlds. Heavily Democratic, the Newport Herald catered to local, working Newporters with an emphasis on local news and sports. At the same time, through wire services and agents in New York, the paper reported the minute details of Newport’s elite summer colony, which transformed from Mrs. Astor’s “Polite 400” to the very public period of “Café Society” of the 1930s and 1940s. This article\u27s examination of the career of W. Douglas Hazard, the Newport Herald’s owner and guiding light for much of its existence, illuminates the paper’s strong emphasis on local coverage including extensive reportage of social activity in the Summer Colony

Division Forms Development and Control

A. Columbus City Code mandates that all new forms have a retention schedule established within one year of creation or receipt. B. The policies and procedures set forth in this Directive apply to both paper and electronic forms