8,115 research outputs found
Exploring QCD with Heavy Ion Collisions
After decades of painstaking research, the field of heavy ion physics has
reached an exciting new era. Evidence is mounting that we can create a high
temperature, high density, strongly interacting ``bulk matter'' state in the
laboratory -- perhaps even a quark-gluon plasma. This strongly interacting
matter is likely to provide qualitative new information about the fundamental
strong interaction, described by Quantum Chromodynamics (QCD). These lectures
provide a summary of experimental heavy ion research, with particular emphasis
on recent results from RHIC (Relativistic Heavy Ion Collider) at Brookhaven
National Laboratory. In addition, we will discuss what has been learned so far
and the outstanding puzzles.Comment: 30 pages, invited Heavy Ion Summary Lectures at the Lake Louise
Winter Institute, February 2003, Lake Louise, Alberta, Canad
‘For the house her self and one servant’: Family and Household in Late Seventeenth-century London
The 1695 returns for the marriage duty tax provide a unique opportunity to investigate the composition of London’s domestic groups. Traditional schemes for the analysis of the early modern family and household fail to capture the complexities of metropolitan living, and a ‘London-specific’
methodology is outlined for use in the returns’ classification. Application of this scheme to returns from two contrasting areas of London, a cluster of wealthy city-centre parishes and a poorer suburban precinct, reveals a
series of structural differences in their families and households that are attributable to the wealth and social status of their respective populations. However, some aspects of the domestic experience within the two areas are
more comparable than previous accounts would suggest
Finite-volume Hyperbolic 3-Manifolds contain immersed Quasi-Fuchsian surfaces
The paper contains a new proof that a complete, non-compact hyperbolic
-manifold with finite volume contains an immersed, closed,
quasi-Fuchsian surface.Comment: Final version to appear in AGT. Some typos corrected, particularly
def (3.6). Rewording of 4 paragraphs in proof of (4.2) for added clarity.
Final section added comparing this paper to the approach of Masters and Zhan
Direct gamma and gamma-jet measurement capability of ATLAS for Pb+Pb collisions
The ATLAS detector at the LHC is capable of efficiently separating photons
and neutral hadrons based on their shower shapes over a wide range in eta, phi,
ET, either in addition to or instead of isolation cuts. This provides ATLAS
with a unique strength for direct photon and gamma-jet physics as well as
access to the unique capability to measure non-isolated photons from
fragmentation or from the medium. We present a first look at the ATLAS direct
photon measurement capabilities in Pb+Pb and, for reference, p+p collisions at
sqrt(sNN)=5.5 TeV over the region |eta|<2.4.Comment: 4 pages, 4 figures - To appear in the conference proceedings for
Quark Matter 2009, March 30 - April 4, 2009, updated to remove draft
linenumbering. No other change
- …