18,519 research outputs found

    New Signatures of Squarks

    Get PDF
    When the gluino is light and long lived, missing energy is a poor signature for both squarks and gluinos. Instead, SqSq∗S_q S_q^* production in e+e−e^+ e^- and ppˉp \bar{p} collisions characteristically results in events with ≥4\ge 4 jets. Methods are proposed for deciding whether an observed excess of 4-jet events is due to SqSq∗S_q S_q^* production. The recent report by ALEPH of observation of 14 4-jet events when 7 were expected is discussed.Comment: 12/22/95 version (put on net 1/1/96) elaborates remarks on squarks as possible source of ALEPH 4-jet excess and adds a ref. latex, 10 pages (including 1 figure), uufile

    Pion Compton Scattering in Perturbative QCD

    Full text link
    Pion Compton scattering is studied in perturbative QCD for real and space--like initial photons. Different methods for the convolution of the hard amplitude with the pion wave--functions, which have in the past led to conflicting results, are compared.Comment: 9 Pages (18 Figs available through ordinary mail) Late

    The Bible as One Story: Images as the Holy Spirit\u27s Device for Making Scripture God\u27s Word Written

    Get PDF
    (Excerpt) My approach to scripture, you probably have guessed, is not that of someone trained by the biblical scholarship critical fellowship. I studied under them as you all did, too. I managed not to think too much about them, because I didn\u27t think much of them. When I was in seminary a number of us got together and wrote a series of four-line doggerel verses on the result of biblical criticism as we were receiving it when applied to the scriptures. I can only remember one of those stanzas: Of wilderness wanderings, there\u27d not be so many; of Abraham\u27s stories, we dare say, not any. The words of our Lord would no longer be dark, and they\u27d all be contained in six verses of Mark

    Tidal Disruption Flares as the Source of Ultra-high Energy Cosmic Rays

    Full text link
    The optical spectral energy distributions of two tidal disruption flares identified by van Velzen et al. (2011) in archival SDSS data, are found to be well-fit by a thin-accretion-disk model. Furthermore, the inferred Supermassive Black Hole mass values agree well with the SMBH masses estimated from the host galaxy properties. Integrating the model SEDs to include shorter wavelength contributions provides an estimate of the bolometric luminosities of the accretion disks. The resultant bolometric luminosities are well in excess of the minimum required for accelerating UHECR protons. In combination with the recent observational estimate of the TDF rate (van Velzen and Farrar, these Proceedings), the results presented here strengthen the case that transient jets formed in tidal disruption events may be responsible for accelerating all or most UHECRs.Comment: 4 pages, 4 figures, invited talk at the ESA Workshop on TIdal Disruption Events and AGN Outbursts, Madrid, June 25-27, 201
    • …
    corecore