122067625
Quasielastic charmed-baryon production and exclusive strange-particle production by high-energy neutrinos
Three charmed-baryon candidates produced in the quasielastic reaction ..nu..n..--> mu../sup -/..lambda../sub c//sup +/..--> mu../sup -/..lambda pi../sup +/ were found in an exposure of the Fermilab deuterium-filled 15-ft bubble chamber to a wide-band neutrino beam. We also found that the cross section of the associated-production reaction ..nu..n..--> mu../sup -/..lambda..K/sup +/ is (5.5 +- 1.3 +- 1.1) x 10/sup -40/ cm/sup 2/ for E/sub ..nu../>10 GeV, and is approximately independent of energy. In addition we studied the cross sections of some quasi-two-body associated strange-particle production reactions other than ..mu../sup -/..lambda..K/sup +/.
121317828
MEASUREMENT OF POLARIZATION IN K$sup +$p ELASTIC SCATTERING AT 1.37, 1.45, 1.71, AND 1.89 GeV/c AND PHASE-SHIFT ANALYSIS.
117056598
Search for Penetrating Massive Neutral Particles Produced in High Energy Proton Collisions
122557716
Measurement of the polarization parameter in K+p elastic scattering at 1.60, 1.80, 2.11 and 2.31 GeV/c
Abstract The polarization parameter for K+p elastic scattering has been measured at 1.60, 1.80, 2.11 and 3.31 GeV/c incident momenta over the entire angular range with an emphasis on the backward region. The results in the extreme backward region appear to be small and consistent with zero.
119364085
DOUBLE-HYPERFRAGMENT EVENT PRODUCED BY K$sup -$ INTERACTION AT 2.3 Bev/c IN NUCLEAR EMULSION
An event is shown that consists of two hyperfragments and a meson (K/sup +) coming from a single interaction star found in a nuclear emulsion stack exposed to a meson (K/sup -/) beam at 2.3 and 2.5 Bev/c. Unique identification of the hyperfragments is impossible, but the binding energy favors LAMBDA H/sup 4/ or LAMBDA He/sup 4/. The nature of the production mechanism cannot be determined on the basis of the iniormation available in this single event. (C.E.S.)
125730338
Proposal for an Extension of E151/227 to Study Neutrino Interactions in Deuterium in the 15-Foot Bubble Chamber with Plates
18483567
Thoughts on heavy quark production
Various aspects of heavy flavour production in heavy ion collisions in the context of elementary collisions are reviewed. The interplay between theory in experiment in e + e - and pp data has been found to be non-trivial, even with new NLO calculations. Quarkonium suppression in p+A and A+A shows puzzling features, apparently connected to features of inclusive particle production. Open charm is found to scale as expected for a hard process, but strangeness is also found to share these features. These features contribute to heavy flavour as a interesting probe of strong interactions.
17733368
Global observables at RHIC
The first three measurements from the RHIC program were results on global observables: charged particle multiplicity (N_ch), transverse energy (E_T) and elliptic flow (v_2). They offer a look at the large-scale features of particle production in high-energy nuclear collisions, with particular insight into entropy production and collective behavior. Results from all of the RHIC experiments are discussed in light of data from lower energy nuclear collisions as well as from high-energy hadronic collisions to test our current understanding of the collision dynamics.
135036248
A study of minimum bias events
122715066
Heavy-ion physics with the ATLAS detector at the LHC
The ATLAS experiment will participate in the Heavy Ion program at the Large Hadron Collider (LHC) and will use its large acceptance, high granularity calorimeters, silicon tracking detectors, and muon spectrometers to study hard scattering processes and jet quenching, quarkonia production and suppression, and global observables in Pb+Pb collisions. The longitudinal and fine transverse segmentation of the ATLAS electromagnetic calorimeter gives ATLAS unique capabilities for measuring complete jets and photons. Brookhaven National Laboratory, Columbia University, Iowa State University, and Stony Brook University propose a focused program to take advantage of ATLAS’s strengths to study the physics of high-energy parton interactions with the quark-gluon plasma (QGP), the physics of Debye screening of Q-Q̄ states in the QGP, and the physics of initial particle production and thermalization to characterize the properties of the QGP created in heavy ion collisions at the LHC. The proposed program can be accomplished for modest cost, will provide substantial physics impact and will have a positive impact on the physics program at the Relativistic Heavy Ion Collider (RHIC) due to the strong involvement of the proposing institutions in the RHIC program. Participation of US groups will strengthen the existing (and growing) ATLAS heavy ion program by bringing physics and analysis expertise developed at RHIC and will allow the US Nuclear Physics program to participate in an experiment that will have subtantial physics impact on the heavy ion community.
1646349
Heavy ion physics at the LHC with the ATLAS detector
The ATLAS detector at CERN will provide a high-resolution longitudinally segmented calorimeter and precision tracking for the upcoming study of heavy ion collisions at the LHC ( GeV). The calorimeter covers |η| < 5 with both electromagnetic and hadronic sections, while the inner detector spectrometer covers |η| < 2.5. ATLAS will study a full range of observables necessary to characterize the hot and dense matter formed at the LHC. Global measurements (particle multiplicities, collective flow) will provide access into its thermodynamic and hydrodynamic properties. Measuring complete jets out to 100's of GeV will allow detailed studies of energy loss and its effect on jets. Quarkonia will provide a handle on deconfinement mechanisms. ATLAS will also study the structure of the nucleon and nucleus using forward physics probes and ultraperipheral collisions, both enabled by segmented zero degree calorimeters.