SUSY QCD impact on top-pair production associated with a Z0Z^0-boson at a photon-photon collider

The top-pair production in association with a $Z^0$-boson at a photon-photon collider is an important process in probing the coupling between top-quarks and vector boson and discovering the signature of possible new physics. We describe the impact of the complete supersymmetric QCD(SQCD) next-to-leading order(NLO) radiative corrections on this process at a polarized or unpolarized photon collider, and make a comparison between the effects of the SQCD and the standard model(SM) QCD. We investigate the dependence of the lowest-order(LO) and QCD NLO corrected cross sections in both the SM and minimal supersymmetric standard model(MSSM) on colliding energy $\sqrt{s}$ in different polarized photon collision modes. The LO, SM NLO and SQCD NLO corrected distributions of the invariant mass of $t\bar t$-pair and the transverse momenta of final $Z^0$-boson are presented. Our numerical results show that the pure SQCD effects in \ggttz process can be more significant in the $+ +$ polarized photon collision mode than in other collision modes, and the relative SQCD radiative correction in unpolarized photon collision mode varies from 32.09% to $-1.89$ when $\sqrt{s}$ goes up from $500 GeV$ to $1.5 TeV$.Comment: 22 pages and 13 figure

Sobre la mort d'Ivan Illitx

En aquest text, els professors de l'Àrea d'Humanitats de l'Escola Universitària d'Infermeria, Fisioteràpia i Nutrició Blanquerna de la Universitat Ramon Llull, analitzen críticament una de les obres menors de Lleó Tolstoi, La mort d'Ivan Illitx. Després de contextualitzar-la, investiguen el tema central de l'obra, l'acompanyament al ben morir i fan lúcides les reflexions sobre l'art d'afrontar la mort en el nostre present

Correction Factors for Reactions involving Quark-Antiquark Annihilation or Production

In reactions with $q \bar q$ production or $q\bar q$ annihilation, initial- and final-state interactions give rise to large corrections to the lowest-order cross sections. We evaluate the correction factor first for low relative kinetic energies by studying the distortion of the relative wave function. We then follow the procedure of Schwinger to interpolate this result with the well-known perturbative QCD vertex correction factors at high energies, to obtain an explicit semi-empirical correction factor applicable to the whole range of energies. The correction factor predicts an enhancement for $q\bar q$ in color-singlet states and a suppression for color-octet states, the effect increasing as the relative velocity decreases. Consequences on dilepton production in the quark-gluon plasma, the Drell-Yan process, and heavy quark production processes are discussed.Comment: 25 pages (REVTeX), includes 2 uuencoded compressed postscript figure

Characteristics of Nature found in the Aatrupadai Literatures

In the Article we can see the importance of nature described in Aattupadai Literature one of the “Pathupaattu” collection in sangam literature. New ideas about the harmony between nature and people of Sangam Period are also been described in the paper, Imageries about sun, rain, land, flower and mountains by the sangam poets were also pointed out with noted evidences. Hence, this paper unfolds the significance and role of nature in the chosen domain area

Marginal Elements in Aattupadai Literatures

There were various artists during the Sangam Literature period, among them, the performers the paanars, occupy a particular place. The paanars are of various kinds based on the musical instrument they play and according to the context in which they sing. The Books that appeared in each period reflect the life of that period. Till date, there are countless books in the history of human society that highlight the lives of marginalized people. The Aattupadai texts talk about the dominant class and the penniless. It cannot be denied that the lives of artists like Panar, Koudhar, Porunar, Viraliyar who lived during the Sangam period were also in a weak state. We can see that all these are recorded in the books which are directed towards anthropological thought. There is no denying that artists, especially those who lived a poor life, had art and tools. It was the treasury of our forefathers. This article talks about these artists, their art and their tools

Rituximab induced hypoglycemia in non-Hodgkin's lymphoma

BACKGROUND: Hypoglycemia is a vary rare toxicity of rituximab. The exact mechanism of rituximab induced hypoglycemia is not clear. CASE PRESENTATION: A 50 year old female presented with a left tonsillar non Hodgkin's lymphoma and was started on R-CHOP chemotherapy. Twenty four hours after the first rituximab infusion, she developed hypoglycemia which was managed by IV glucose infusion. CONCLUSION: Hypoglycemia following rituximab administration is rare. Possibilities of hypoglycemia should be kept in mind in patients developing symptoms like fatigue, restlessness, and sweating while on rituximab therapy

Experimental evaluation of a new approach for a two-stage hydrothermal biomass liquefaction process

A new approach for biomass liquefaction was developed and evaluated in a joint research project. Focus of the project, called FEBio@H2O, lies on a two-step hydrothermal conversion. Within step 1, the input biomass is converted employing a hydrothermal degradation without added catalyst or by homogeneous catalysis. Within step 2, the hydrogen accepting products of step 1, e.g., levulinic acid (LA) are upgraded by a heterogeneously catalyzed hydrogenation with hydrogen donor substances, e.g., formic acid (FA). As a result, components with an even lower oxygen content in comparison to step 1 products are formed; as an example, γ-valerolactone (GVL) can be named. Therefore, the products are more stable and contained less oxygen as requested for a possible application as liquid fuel. As a hydrothermal process, FEBio@H2O is especially suitable for highly water-containing feedstock. The evaluation involves hydrothermal conversion tests with model substances, degradation of real biomasses, transfer hydrogenation or hydrogenation with hydrogen donor of model substances and real products of step 1, catalyst selection and further development, investigation of the influence of reactor design, the experimental test of the whole process chain, and process assessment