994 resultados para 125-780D


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In this thesis we build a novel analysis framework to perform the direct extraction of all possible effective Higgs boson couplings to the neutral electroweak gauge bosons in the H → ZZ(*) → 4l channel also referred to as the golden channel. We use analytic expressions of the full decay differential cross sections for the H → VV' → 4l process, and the dominant irreducible standard model qq ̄ → 4l background where 4l = 2e2μ,4e,4μ. Detector effects are included through an explicit convolution of these analytic expressions with transfer functions that model the detector responses as well as acceptance and efficiency effects. Using the full set of decay observables, we construct an unbinned 8-dimensional detector level likelihood function which is con- tinuous in the effective couplings, and includes systematics. All potential anomalous couplings of HVV' where V = Z,γ are considered, allowing for general CP even/odd admixtures and any possible phases. We measure the CP-odd mixing between the tree-level HZZ coupling and higher order CP-odd couplings to be compatible with zero, and in the range [−0.40, 0.43], and the mixing between HZZ tree-level coupling and higher order CP -even coupling to be in the ranges [−0.66, −0.57] ∪ [−0.15, 1.00]; namely compatible with a standard model Higgs. We discuss the expected precision in determining the various HVV' couplings in future LHC runs. A powerful and at first glance surprising prediction of the analysis is that with 100-400 fb-1, the golden channel will be able to start probing the couplings of the Higgs boson to diphotons in the 4l channel. We discuss the implications and further optimization of the methods for the next LHC runs.

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The present work appertains to a series of investigations in the field of trophodynamics of water bodies conducted by the department of hydrobiology ”Mosrybvtuza” under the leadership of Prof. Director N.S. Gaevska. Usually with quantitative collections of benthos ostracoda are hardly taken account of. But with the employment of special methods it is possible to be convinced that they are encountered in massive numbers. The role of ostracods in the nutrition of fish is recognised as important by many authors. On the question of the feeding of ostracods, in the literature there are only the fragmentary indications about the occurrence in the gut of ostracods of algae (diatoms, desmids) and detritus. The study of the feeding of ostracods was conducted both by the method of dissecting the guts of ostracods taken from natural waters, and by the method of feeding ostracods under laboratory conditions with a variety of food objects. Moreover, with a view to revision of obtained quantitative data, for determination of food requirements of ostracods the respiration method was applied.

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The Siberian Dace (Leuciscus leuciscus baicalensis (Dyb)is an important trade fish in Siberian waters. In the Ob basin more than 30,000 centners are produced annually. Catches of dace fluctuate significantly both between different rivers and between years in the Tomsk region. Defining the stocks of dace in the waters of the Tomsk region and explaining the fluctuations over time seems to be a very important and relevant question for the workers of the fishing industry. An answer, however, requires an accurate knowledge of the biology of dace; its reproductive, feeding and migration habits and the conditions of wintering etc. In the following we examine one of the above questions i.e. the biology of the reproduction of dace. The study was carried out in the Middle Ob in May 1951. This tranlations provides the introduction, summary and table captions only of the original article.

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通过116Cd(14N,5n),Ebeam=65MeV的核反应布居了125Cs的高自旋态.利用在束γ谱学实验方法,进行了γ γ符合测量,使已知的125Cs核能级纲图得到了扩展,并且修正了某些组态的带头激发能.

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简单介绍了利用LNS的回旋加速器产生的116Sn束轰击12C和24Mg靶的实验装置以及实验过程.该实验通过MEDEA探测器测量了由全熔合与非全熔合反应产生的较低激发能区(160—300MeV)质量数A≈125的热核的巨偶极共振特性,比较了不同靶子、不同束流能量时巨偶极共振的γ产额的变化.

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利用在束γ谱学方法,通过~(124)Sn(~7Li,α2n)反应研究了~(125)Sb的激发态,首次建立了~(125)Sb的高自旋能级纲图,其中包括21条新γ跃迁和14个新能级。发现1970,2110和2470 keV3个能级为同质异能态,基于延迟符合测量确定了它们的寿命范围,并确定其自旋、宇称分别为15/2~-,19/2~-和23/2~+。根据粒子-核芯耦合图像和经验壳模型计算解释了~(125)Sb的能级结构,3个同质异能态的组态分别被指定为πg_(7/2)(×)V(h_(11/2)s_(1/2))_(5~-),πg_(7/2)(×)V(h_(11/2)d_(3/2))_(7~-)和πg_(7/2)(×)V(h_(11/2)~2)_(10~+),

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利用在束γ谱学方法 ,通过1 2 4 Sn( 7Li,α2n)反应首次研究了丰中子核1 2 5Sb的高自旋态 .建立了自旋达 2 3 2 +、激发能至 2 63 7keV的能级纲图 ,其中包括 2 1条新γ跃迁和 1 4个新能级 .在 1 970 ,2 1 1 0和 2 471keV识别出了 3个同质异能态 ,估计了它们的寿命范围 ,并建议分别具有πg7 2 ν(h1 1 2 s1 2 ) ,πg7 2 ν(h1 1 2 d3 2 ) ,πg7 2 ν(h21 1 2 )三准粒子组态 .根据价质子与1 2 4 Sn核芯激发态的耦合讨论了1 2 5Sb的能级结构 .

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Abstract
BACKGROUND: We present two clinical cases from a single institution where a final diagnosis of cardiac failure was made following the initial finding of ascites and an elevated CA 125 level. In both cases gynaecological malignancy was initially suspected.