13,096 research outputs found

    CP violation in B_s mixing from heavy Higgs exchange

    Full text link
    The anomalous dimuon charge asymmetry reported by the D0 Collaboration may be due to the tree-level exchange of some spin-0 particles that mediate CP violation in B_s-\bar{B}_s meson mixing. We show that for a range of couplings and masses, the heavy neutral states in a two Higgs doublet model can generate a large charge asymmetry. This range is natural in "uplifted supersymmetry", and may enhance the B^- -> tau nu and B_s -> mu^+ mu^- decay rates. However, we point out that on general grounds the reported central value of the charge asymmetry requires new physics not only in B_s-\bar{B}_s mixing but also in \Delta B = 1 transitions or in B_d-\bar{B}_d mixing.Comment: 5 pages, 1 figure. v2: Equations (17)-(19) included to clarify the flavor structure of uplifted supersymmetr

    The Judicial Treatment of the Automobile Dealer Franchise Act

    Get PDF
    The representatives of the auto industry initially viewed the act with a jaundiced eye and warned that this special class legislation6 would radically change the existing case law by allowing the dealer to win where formerly he would have lost. However, the court decisions under the act have not borne out such dire predictions. This discussion will examine what has, in fact, been the judicial interpretation and treatment of the act

    Perturbations in the Ekpyrotic Scenarios

    Full text link
    With the new cosmological data gathered over the last few years, the inflationary paradigm has seen its predictions largely unchallenged. A recent proposal, called the ekpyrotic scenario, was argued to be a viable competitor as it was claimed that the spectrum of primordial perturbations it produces is scale invariant. By investigating closely this scenario, we show that the corresponding spectrum depends explicitly on an arbitrary function of wavenumber and is therefore itself arbitrary. It can at will be set scale invariant. We conclude that the scenario is not predictive at this stage.Comment: 4 pages, no figure, uses moriond.sty, to appear in the proceeding of the Moriond cosmology meeting held at Les Arcs, France (March 16-23, 2002

    Acroneuria lycorias (Boreal Stonefly, Plecoptera: Perlidae) Emergence Behaviors Discovered in Pinus strobus Canopy

    Get PDF
    Species of Plecoptera, or stoneflies, are known to use vertical emergence supports, and researchers believe many species of Plecoptera exploit arboreal habitats during emergence. However, the exact nature of these arboreal behaviors has largely remained a mystery. While exploring the habitat potential of Pinus strobus (L.) (Eastern White Pine) canopies in northern Wisconsin we observed Acroneuria lycorias (Newman) (Boreal Stonefly, Plecoptera: Perlidae) exuviae at heights as high as 12m (observations at 6.6, 9, 9.5, and 12m). Most A. lycorias exuviae appeared to have a strong preference for emergence sites at the underside or base of branches similar to some Odonate species. We also observed A. lycorias, adults climbing upwards along the main stem, post-emergence, to heights up to 22m. To our knowledge, these heights represent the greatest heights ever documented for A. lycorias adults and exuviae, or any Plecopteran species. While other researchers have speculated that A. lycorias uses arboreal habitats during emergence, these behaviors were considered almost impossible to describe. Our observations provide us with new insights into Plecopteran emergence behaviors, especially for this species. We propose three alternative hypotheses that may explain these unique emergence behaviors

    Federal Courts-Jurisdiciton-District Court Transfer of Action Under Section 1406(a) Without Jurisdiction Over Person of Defendant

    Get PDF
    In 1956 plaintiff corporation brought a private antitrust action against various persons and corporations in a federal district court in Pennsylvania. Service was made upon defendant corporations by means of alias summonses in New York where they were amenable to suit. Since defendant corporations were not inhabitants of, found, or transacting business in Pennsylvania, venue was improper there and the extraterritorial service of- process provision of the Clayton Act was not available to plaintiff. Defendant corporations moved to dismiss for lack of in personam jurisdiction. Instead, however, the court, invoking section 1406(a) of the Judicial Code, transferred the action in 1958 to a federal district court in New York. The latter court granted defendants\u27 motion to dismiss on the ground that the transfer was unauthorized because the Pennsylvania court lacked personal jurisdiction over defendants. The United States Court of Appeals for the Second Circuit affirmed, with one judge dissenting. On certiorari to the Supreme Court, held, reversed, two Justices dissenting. When it is in the interest of justice, section 1406(a) authorizes the transfer of cases whether the transferor court has personal jurisdiction over the defendants or not. Goldlawr, Inc. v. Heiman, 369 U.S. 468 (1962)
    • …
    corecore