155 research outputs found
Measurements of B→J/ψ at forward rapidity in p+p collisions at √s=510 GeV
No full textWe report the first measurement of the fraction of J=ψ mesons coming from B-meson decay (FB→J=ψ ) in p þ p collisions at ffiffi s p ¼ 510 GeV. The measurement is performed using the forward silicon vertex detector and central vertex detector at PHENIX, which provide precise tracking and distance-of-closestapproach determinations, enabling the statistical separation of J=ψ due to B-meson decays from prompt J=ψ. The measured value of FB→J=ψ is 8.1% 2.3%ðstatÞ 1.9%ðsystÞ for J=ψ with transverse momenta 0 \u3c pT \u3c 5 GeV=c and rapidity 1.2 \u3c jyj \u3c 2.2. The measured fraction FB→J=ψ at PHENIX is compared to values measured by other experiments at higher center of mass energies and to fixed-order-next-toleading-logarithm and color-evaporation-model predictions. The bb¯ cross section per unit rapidity [dσ=dyðpp → bb¯Þ] extracted from the obtained FB→J=ψ and the PHENIX inclusive J=ψ cross section measured at 200 GeV scaled with color-evaporation-model calculations, at the mean B hadron rapidity y ¼ 1.7 in 510 GeV p þ p collisions, is 3.63+1.92 −1.70 μb. It is consistent with the fixed-order-next-toleading-logarithm calculations.
Design and Beam Test Results for the sPHENIX Electromagnetic and Hadronic Calorimeter Prototypes
No full textA Bibliography of the Rusty Grain Beetle, \u3ci\u3eCryptolestes ferrugineus\u3c/i\u3e (Stephens) (Coleoptera: Cucujidae)
No full textRusty grain beetles are major pests of stored products throughout most of the world. This bibliography lists 239 papers published about these beetles. Citations are grouped by subject and are indexed by geography, host, and author
Rusty Brown e o Nariz de Toulouse Lautrec: um policial de inspiração múltipla
No full textMestrado em Línguas, Literaturas e CulturasO presente projeto propõe reconhecer o contributo de Miguel Barbosa para o panorama literário e artístico português, nomeadamente no âmbito da literatura policial portuguesa, um universo peculiar e merecedor desta pretensão.
Para tal, e para além de abordar o romance enquanto forma artística da era contemporânea, versamos o itinerário percorrido pelo romance policial, com uma breve incursão pelo romance policial português. Rusty Brown e o Nariz de Toulouse Lautrec, de Miguel Barbosa, sob o pseudónimo de Rusty Brown, integra-se numa série de romances policiais do autor, servindo, por um lado, como pretexto para abordar a literatura policial contemporânea portuguesa e, por outro, para confirmar a personalidade multifacetada que caracteriza o autor e a originalidade da sua narrativa policial de inspiração múltipla.This projet proposes to recognize the contribution of Miguel Barbosa to the literary and artistic portuguese scene, particularly in the context of the portuguese police literature, a peculiar universe and deserving of this claim.
To that end, in addition to addressing the novel as an artistic form of the contemporary era, we drow the route traveled by the detective story, with a brief incursion by Portuguese police novel. Rusty Brown and Toulouse Lautrec Nose, of Miguel Barbosa, under the pseudonym of Rusty Brown, is part of a series of police of the author novels, serving as a pretext to study the contemporary Portuguese police literature and, on the other, to confirm the multifaceted personality that characterizes the author and the originality of his police narrative of multiple inspiration
Measurement of two-particle correlations with respect to second- and third-order event planes in Au + Au collisions at √sNN = 200 GeV
No full textWe present measurements of azimuthal correlations of charged hadron pairs in √sNN=200 GeV Au+Au collisions for the trigger and associated particle transverse-momentum ranges of 14GeV/c) correlations is suppressed compared with that of correlations measured in p+p collisions. At the lowest associated particle pT(0.
Versatile Object-oriented Real-Time Operating System
No full textThesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.Includes bibliographical references (p. 79-80).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.As computer software has become more complex in response to increasing demands and greater levels of abstraction, so have computer operating systems. In order to achieve the desired level of functionality, operating systems have become less flexible and overly complex. The additional complexity and abstraction introduced often leads to less efficient use of hardware and increased hardware requirements. In embedded systems with limited hardware resources, efficient resource use is extremely important to the functionality of the resources. Therefore, operating system functionality not useful for the embedded system's applications is detrimental to the system. Component-based software provides a way to achieve both the efficient application-specific functionality required in embedded systems and the ability to extend this functionality to other applications. This thesis presents a component-based operating system, VORTOS, the Versatile Object-oriented Real-Time Operating System. VORTOS uses a virtual machine to abstract the hardware, eliminating the need for further portability abstractions within the operating system and application level components. The simple modular component architecture allows both the operating system and user applications to be extremely flexible by allowing them to utilize the particular components required, without sacrificing performance.by Rusty Lee.M.Eng.and S.B
Measurement of the normalized 238U(n,f)/235U(n,f) cross section ratio from threshold to 30 MeV with the NIFFTE fission Time Projection Chamber
No full textThe normalized 238U(n,f)/235U(n,f) cross section ratio has been measured using the NIFFTE fission Time Projection Chamber (fissionTPC) from the reaction threshold to 30MeV. The fissionTPC is a two-volume MICROMEGAS time projection chamber that allows for full three-dimensional reconstruction of fission-fragment ionization profiles from neutron-induced fission. The measurement was performed at the Los Alamos Neutron Science Center, where the neutron energy is determined from neutron time of-flight. The 238U(n,f)/235U(n,f) ratio reported here is the first cross section measurement made with the fissionTPC, and will provide new experimental data for evaluation of the 238U(n,f) cross section, an important standard used in neutron-flux measurements. Use of a development target in this work prevented the determination of an absolute normalization, to be addressed in future measurements. Instead, the measured cross section ratio has been normalized to ENDF/B-VIII.β5 at 14.5 MeV
Measurements of Multiparticle Correlations in d + Au Collisions at 200, 62.4, 39, and 19.6 GeV and p + Au Collisions at 200 GeV and Implications for Collective Behavior
No full textRecently, multiparticle-correlation measurements of relativistic p/d/3He+Au, p+Pb, and even p+pcollisions show surprising collective signatures. Here, we present beam-energy-scan measurements of two-, four-, and six-particle angular correlations in d+Au collisions at √sNN=200, 62.4, 39, and 19.6 GeV. We also present measurements of two- and four-particle angular correlations in p+Aucollisions at √sNN=200 GeV. We find the four-particle cumulant to be real valued for d+Aucollisions at all four energies. We also find that the four-particle cumulant in p+Au has the opposite sign as that in d+Au. Further, we find that the six-particle cumulant agrees with the four-particle cumulant in d+Au collisions at 200 GeV, indicating that nonflow effects are subdominant. These observations provide strong evidence that the correlations originate from the initial geometric configuration, which is then translated into the momentum distribution for all particles, commonly referred to as collectivity
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