3,218 research outputs found

    Isolated Lepton Production at Colliders

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    The production of isolated leptons with high transverse momentum in high energy e-e, p-p or e-p collisions is reviewed. The leptons are produced either through boson splitting or by boson-boson collision and yield experimentally simple and spectacular topologies which can be exploited to validate the Standard Model or to search for new phenomena.Comment: 50 page

    Electroweak Measurements

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    The measurements of electroweak sector of the Standard Model are presented, including most recent results from LEP, Tevatron and HERA colliders. The robustness of the Standard Model is illustrated with the precision measurements, the electroweak fits and the comparisons to the results obtained from low energy experiments. The status of the measurements of the WW boson properties and rare production processes involving weak bosons at colliders is examined, together with the measurements of the electroweak parameters in epep collisions.Comment: 12 pages, Proceedings of "Lepton-Photon 2005", Upsalla, Swede

    Improved variables for measuring the LambdabLambda_b polarization

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    We discuss a few possible strategies for measuring the polarization of the Λb\Lambda_{\mathrm{b}} baryons produced in e+ee^+e^--annihilation at the Z\mathrm{Z} resonance through their inclusive semileptonic decays. After reviewing the existing methods, a new method is proposed, based on the ratio of the averages of the squared electron and neutrino energy, including both perturbative and nonperturbative corrections. This variable minimizes the statistical error on the Λb\Lambda_{\mathrm{b}} polarization, while keeping the systematic theoretical errors at the level of 1-2%. A number of other polarization-sensitive variables are also discussed, such as averages of ratios of the electron and neutrino energy and the distribution in the difference of the electron and neutrino rapidities.Comment: 23 pages, 4 uuencoded figures, REVTe

    Agricultural life annuity

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    The agricultural life annuity represents a measure taken by the State in order to reform the domain of the property by the Law 247/2005 concerning the reform in the field of property and justice. The aim is to concentrate the agricultural areas in efficient farms, objective imposed by the necessity of modernizing the Romanian agriculture. The agricultural life annuity is paid to the fund holder that alienates or leases the land he owns, which is situated outside built-over areas, with an area up to 10 hectares. The fund holder has the possibility to keep only up to 0.5 hectares for his own utility. A longer period to apply this programme is necessary to make it work and to have the effect we expect. The agricultural life annuity may be adopted under a form of an anticipated retiring of the farmers in our legislation

    On the uniqueness of D=11 interactions among a graviton, a massless gravitino and a three-form. III: Graviton and gravitini

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    Under the hypotheses of smoothness of the interactions in the coupling constant, locality, Poincare invariance, Lorentz covariance, and the preservation of the number of derivatives on each field in the Lagrangian of the interacting theory (the same number of derivatives like in the free Lagrangian), we prove that in D=11 there are no cross-interactions between the graviton and the massless gravitino and also no self-interactions in the Rarita-Schwinger sector. A comparison with the case D=4 is briefly discussed.Comment: 16 page

    Pelvic floor disorders in gynecological malignancies. An overlooked problem?

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    Cervical, endometrial, ovarian, vulvar, and vaginal cancers affect women of a broad age spectrum. Many of these women are still sexually active when their cancer is diagnosed. Treatment options for gynecological malignancies, such as gynecological surgery, radiation, and chemotherapy, are proven risk factors for pelvic floor dysfunction. The prevalence of urinary incontinence, fecal incontinence, and sexual dysfunction before cancer treatment is still unclear. Hypotheses have been raised in the literature that these manifestations could represent early symptoms of pelvic cancers, but most remain overlooked even in cancer surviving patients. The primary focus of therapy is always cancer eradication, but as oncological and surgical treatment options become more successful, the number of cancer survivors increases. The quality of life of patients with gynecological cancers often remains an underrated subject. Pelvic floor disorders are not consistently reported by patients and are frequently overlooked by many clinicians. In this brief review we discuss the importance of pelvic floor dysfunction in patients with gynecological malignant tumors

    Pheochromocytoma – clinical manifestations, diagnosis and current perioperative management

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    Pheochromocytoma is a neuroendocrine tumor characterized by the excessive production of catecholamines (epinephrine, norepinephrine, and dopamine). The diagnosis is suspected due to hypertensive paroxysms, associated with vegetative phenomena, due to the catecholaminergic hypersecretion. Diagnosis involves biochemical tests that reveal elevated levels of catecholamine metabolites (metanephrine and normetanephrine). Functional imaging, such as 123I-metaiodobenzylguanidine scintigraphy (123I-MIBG), has increased specificity in identifying the catecholamine-producing tumor and its metastases. The gold-standard treatment for patients with pheochromocytoma is represented by the surgical removal of the tumor. Before surgical resection, it is important to optimize blood pressure and intravascular volume in order to avoid negative hemodynamic events
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