2,501 research outputs found

    A Search for the Singlet-P State hc(1 1P1) of Charmonium in Proton-Antiproton Annihilations at Fermilab Experiment E835p

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    We present the results of a search for the spin-singlet P-wave state hc(1 1P1) of charmonium formed through proton-antiproton annihilation at Fermilab experiment E835. The decay channels whjich were studied were ppbar -> J/psi + X -> e^+e^- + X, ppbar -> J/psi + pi0 -> e^+e^- + 2gamma, ppbar -> J/psi + pi0pi0 -> e^+e^- + 4gamma, and the neutral channel ppbar -> eta_c gamma -> (2gamma) gamma. The decay ppbar -> J/psi gamma -> e^+e^- gamma, into which 1P1 decay is forbidden by C-parity conservation, was also examined for comparison The 90% confidence upper limits for the decay channels studied in the mass range 3525.1-3527.3 MeV for a 1P1 resonance with a presumed width of 1.0 MeV were determined to be B(ppbar->1P1)xB(1P1->J/psi+X) <= 1.8x10^-7, B(ppbar->1P1)xB(1P1->J/psi+pi0) <= 1.2x10^-7, and B(ppbar->1P1)xB(1P1->J/psi+gamma) <= 1.0x10^-7. No evidence for a 1P1 enhancement was observed in either of the two additional reactions studied.Comment: 200+ pages, Northwestern University Ph. D. Thesi

    Associated Charmonium Production in p-pbar Annihilation

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    In this paper we summarize our recent results for low energy associated charmonium production cross sections, using 1) crossing symmetry, and 2) an explicit hadronic model. These predictions are of relevance to the planned charmonium and charmonium hybrid production experiment PANDA at GSI.Comment: 5 pages, 5 figures. Contribution to the Second Meeting of the APS Topical Group on Hadron Physics GHP2006. (Nashville, TN, 22-24 Oct. 2006

    A census of the edition of 1555 of Andreas Vesalius' De Humani Corporis Fabrica

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    The purpose of this study was to determine the locations of the second edition (1555) of the De Humani Corporis Fabrica written by Vesalius

    City dweller aspirations for cities of the future: How do environmental and personal wellbeing feature?

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    This paper explores city dweller aspirations for cities of the future in the context of global commitments to radically reduce carbon emissions by 2050; cities contribute the vast majority of these emissions and a growing bulk of the world's population lives in cities. The particular challenge of creating a carbon reduced future in democratic countries is that the measures proposed must be acceptable to the electorate. Such acceptability is fostered if carbon reduced ways of living are also felt to be wellbeing maximising. Thus the objective of the paper is to explore what kinds of cities people aspire to live in, to ascertain whether these aspirations align with or undermine carbon reduced ways of living, as well as personal wellbeing. Using a novel free associative technique, city aspirations are found to cluster around seven themes, encompassing physical and social aspects. Physically, people aspire to a city with a range of services and facilities, green and blue spaces, efficient transport, beauty and good design. Socially, people aspire to a sense of community and a safe environment. An exploration of these themes reveals that only a minority of the participants' aspirations for cities relate to lowering carbon or environmental wellbeing. Far more consensual is emphasis on, and a particular vision of, aspirations that will bring personal wellbeing. Furthermore, city dweller aspirations align with evidence concerning factors that maximise personal wellbeing but, far less, with those that produce low carbon ways of living. In order to shape a lower carbon future that city dwellers accept the potential convergence between environmental and personal wellbeing will need to be capitalised on: primarily aversion to pollution and enjoyment of communal green space

    Solid fuel use and cooking practices as a major risk factor for ALRI mortality among African children

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    Background: Almost half of global child deaths due to acute lower respiratory infections (ALRIs) occur in sub-Saharan Africa, where three-quarters of the population cook with solid fuels. This study aims to quantify the impact of fuel type and cooking practices on childhood ALRI mortality in Africa, and to explore implications for public health interventions. Methods: Early-release World Health Survey data for the year 2003 were pooled for 16 African countries. Among 32 620 children born during the last 10 years, 1455 (4.46%) were reported to have died prior to their fifth birthday. Survival analysis was used to examine the impact of different cooking-related parameters on ALRI mortality, defined as cough accompanied by rapid breathing or chest indrawing based on maternal recall of symptoms prior to death. Results: Solid fuel use increases the risk of ALRI mortality with an adjusted hazard ratio of 2.35 (95% CI 1.22 to 4.52); this association grows stronger with increasing outcome specificity. Differences between households burning solid fuels on a well-ventilated stove and households relying on cleaner fuels are limited. In contrast, cooking with solid fuels in the absence of a chimney or hood is associated with an adjusted hazard ratio of 2.68 (1.38 to 5.23). Outdoor cooking is less harmful than indoor cooking but, overall, stove ventilation emerges as a more significant determinant of ALRI mortality. Conclusions: This study shows substantial differences in ALRI mortality risk among African children in relation to cooking practices, and suggests that stove ventilation may be an important means of reducing indoor air pollution

    DRVOREZI ANDREASA VESALIUSA: ČETRISTOLJETNO PUTOVANJE OD STVARANJA DO UNIŠTENJA

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    The purpose of this study was to trace the history of woodblocks created in 1542 by Andreas Vesalius (1514-1564). Carved by the Venetian workmen on pear tree boards, the woodblocks were used in the Basel printing of Vesalius’ works De Humani Corporis Fabrica and Epitome from 1543, The China Root Epistle (1546), and the frontispiece of the Fabrica, the edition from 1555. The blocks remained with the printer Oporinus in Basel until his death in 1568 when they were sold to the Froben family. The woodblocks reappeared in 1706 in a publication by Maschenbauer and were subsequently used by Leveling in 1783. An incomplete set of woodblocks was moved from Inglostadt to Landshut and then to Munich where Roth in 1885 documented them. At the suggestion of an American physician, Samuel Lambert, the University of Munich found the “missing” woodblocks in the attic. This led Wiegand and the New York Academy of Medicine to publish the woodblocks in the Icones Anatomicae in 1934. The second edition frontispiece was returned to Louvain where it was destroyed by bombing in 1940 and all the remaining woodblocks were destroyed in Allied bombing between 1943 and 1945. Thus, the Vesalius woodblocks travelled a 400-year journey from The purpose of this study was to trace the history of woodblocks created in 1542 by Andreas Vesalius (1514-1564). Carved by the Venetian workmen on pear tree boards, the woodblocks were used in the Basel printing of Vesalius’ works De Humani Corporis Fabrica and Epitome from 1543, The China Root Epistle (1546), and the frontispiece of the Fabrica, the edition from 1555. The blocks remained with the printer Oporinus in Basel until his death in 1568 when they were sold to the Froben family. The woodblocks reappeared in 1706 in a publication by Maschenbauer and were subsequently used by Leveling in 1783. An incomplete set of woodblocks was moved from Inglostadt to Landshut and then to Munich where Roth in 1885 documented them. At the suggestion of an American physician, Samuel Lambert, the University of Munich found the “missing” woodblocks in the attic. This led Wiegand and the New York Academy of Medicine to publish the woodblocks in the Icones Anatomicae in 1934. The second edition frontispiece was returned to Louvain where it was destroyed by bombing in 1940 and all the remaining woodblocks were destroyed in Allied bombing between 1943 and 1945. Thus, the Vesalius woodblocks travelled a 400-year journey from The purpose of this study was to trace the history of woodblocks created in 1542 by Andreas Vesalius (1514-1564). Carved by the Venetian workmen on pear tree boards, the woodblocks were used in the Basel printing of Vesalius’ works De Humani Corporis Fabrica and Epitome from 1543, The China Root Epistle (1546), and the frontispiece of the Fabrica, the edition from 1555. The blocks remained with the printer Oporinus in Basel until his death in 1568 when they were sold to the Froben family. The woodblocks reappeared in 1706 in a publication by Maschenbauer and were subsequently used by Leveling in 1783. An incomplete set of woodblocks was moved from Inglostadt to Landshut and then to Munich where Roth in 1885 documented them. At the suggestion of an American physician, Samuel Lambert, the University of Munich found the “missing” woodblocks in the attic. This led Wiegand and the New York Academy of Medicine to publish the woodblocks in the Icones Anatomicae in 1934. The second edition frontispiece was returned to Louvain where it was destroyed by bombing in 1940 and all the remaining woodblocks were destroyed in Allied bombing between 1943 and 1945. Thus, the Vesalius woodblocks travelled a 400-year journey from their creation, through the use in eight publications with over 5000 prints and ended in their tragic destruction.Cilj ovoga rada bilo je istraživanje povijesti drvoreza koje je 1542. godine izradio Andreas Vesalius (1514.–1564.). Izrezbareni od strane venecijanskog umjetnika na pločama kruškinoga drveta, drvorezi su korišteni u Baselu za tiskanje Vesaliusovih djela De Humani Corporis Fabrica i Epitome iz 1543. godine, Traktata o kineskom korijenu (1546.) te naslovnice izdanja Fabricae iz 1555. godine. Matrice su ostale sa tiskarom Oporinusom u Baselu do njegove smrti 1568. godine, nakon koje su prodani obitelji Froben. Nakon toga se ponovo pojavljuju 1706. godine u publikaciji Maschenbauera da bi ih potom koristio Leveling 1783. godine. Nepotpuni set drvoreza premješten je iz Ingolstadta u Landshut, a zatim u Minhen, gdje ih je 1885. godine dokumentirao Roth. Na prijedlog američkoga liječnika Samuela Lamberta Sveučilište u Minhenu pronašlo je “izgubljene” drvoreze na tavanu. To je navelo Wiega i Medicinsku Akademiju grada New Yorka da 1934. godine objave drvoreze u Icones Anatomicae. Drugo izdanje naslovnice vraćeno je u Louvain, gdje je uništeno u bombardiranju 1940. godine, da bi svi preostali drvorezi bili uništeni u savezničkim bombardiranjima između 1943. i 1945. godine. Tako su Vesaliusovi drvorezi prošli četiristoljetno putovanje od svojega stvaranja, preko osam izdanja s preko 5000 otisaka, do svojega tragičnoga uništenja

    Search for the rare decay D^{0}→γγ at Belle

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    We search for the rare radiative decay D 0 → γγ using a data sample with an integrated luminosity of 832 fb−1 recorded by the Belle detector at the KEKB e +e − asymmetric-energy collider. We find no statistically significant signal and set an upper limit on the branching fraction of B(D 0 → γγ) \u3c 8.5 × 10−7 at 90% confidence level. This is the most restrictive limit on the decay channel to date

    Search for CP Violation and Measurement of the Branching Fraction in the Decay D0 → K0 SK0 S

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    We report a study of the decay D0→K0SK0S using 921  fb−1 of data collected at or near the Υ(4S) and Υ(5S) resonances with the Belle detector at the KEKB asymmetric energy e+e− collider. The measured time-integrated CP asymmetry is ACP(D0→K0SK0S)=(−0.02±1.53±0.02±0.17)%, and the branching fraction is B(D0→K0SK0S)=(1.321±0.023±0.036±0.044)×10−4, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D0→K0Sπ0). These results are significantly more precise than previous measurements available for this mode. The ACP measurement is consistent with the standard model expectation

    Measurement of the Michel parameters (, ξκ) in the radiative leptonic decay of τ

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    We present the first measurement of the Michel parameters ¯η and ξκ in the radiative leptonic decay of the τ lepton using 703 fb−1 of data collected with the Belle detector at the KEKB e +e − collider. The Michel parameters are measured by an unbinned maximum likelihood fit to the kinematic information of e +e − → τ +τ − → (π +π 0ν¯)(l −ννγ¯ ) (l = e or µ). The preliminary values of the measured Michel parameters are ¯η = −2.0 ± 1.5 ± 0.8 and ξκ = 0.6 ± 0.4 ± 0.2, where the first error is statistical and the second is systematic
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