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Title: Upper limit of D{sup 0} production in central Pb-Pb collisions at 158A GeV

Abstract

Results are presented from a search for the decays D{sup 0}{yields}K{sup -}{pi}{sup +} and D{sup 0}{yields}K{sup +}{pi}{sup -} in a sample of 3.8x10{sup 6} central Pb-Pb events collected with a beam energy of 158A GeV by NA49 at the CERN SPS. No signal is observed. An upper limit on D{sup 0} production is derived and compared to predictions from several models.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;  [1]; ; ; ;  [2]; ;  [3]
  1. Fachbereich Physik der Universitaet, Frankfurt (Germany)
  2. Rudjer Boskovic Institute, Zagreb (Croatia)
  3. Joint Institute for Nuclear Research, Dubna (Russian Federation) (and others)
Publication Date:
OSTI Identifier:
20771371
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.73.034910; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CERN SPS SYNCHROTRON; D NEUTRAL MESONS; GEV RANGE; KAONS MINUS; KAONS PLUS; LEAD 208 REACTIONS; LEAD 208 TARGET; PARTICLE DECAY; PARTICLE PRODUCTION; PIONS MINUS; PIONS PLUS

Citation Formats

Alt, C., Blume, C., Bramm, R., Dinkelaker, P., Flierl, D., Kliemant, M., Kniege, S., Lungwitz, B., Mitrovski, M., Renfordt, R., Schuster, T., Stock, R., Stroebele, H., Wetzler, A., Anticic, T., Kadija, K., Nicolic, V., Susa, T., Baatar, B., and Kolesnikov, V. I. Upper limit of D{sup 0} production in central Pb-Pb collisions at 158A GeV. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.034910.
Alt, C., Blume, C., Bramm, R., Dinkelaker, P., Flierl, D., Kliemant, M., Kniege, S., Lungwitz, B., Mitrovski, M., Renfordt, R., Schuster, T., Stock, R., Stroebele, H., Wetzler, A., Anticic, T., Kadija, K., Nicolic, V., Susa, T., Baatar, B., & Kolesnikov, V. I. Upper limit of D{sup 0} production in central Pb-Pb collisions at 158A GeV. United States. doi:10.1103/PhysRevC.73.034910.
Alt, C., Blume, C., Bramm, R., Dinkelaker, P., Flierl, D., Kliemant, M., Kniege, S., Lungwitz, B., Mitrovski, M., Renfordt, R., Schuster, T., Stock, R., Stroebele, H., Wetzler, A., Anticic, T., Kadija, K., Nicolic, V., Susa, T., Baatar, B., and Kolesnikov, V. I. Wed . "Upper limit of D{sup 0} production in central Pb-Pb collisions at 158A GeV". United States. doi:10.1103/PhysRevC.73.034910.
@article{osti_20771371,
title = {Upper limit of D{sup 0} production in central Pb-Pb collisions at 158A GeV},
author = {Alt, C. and Blume, C. and Bramm, R. and Dinkelaker, P. and Flierl, D. and Kliemant, M. and Kniege, S. and Lungwitz, B. and Mitrovski, M. and Renfordt, R. and Schuster, T. and Stock, R. and Stroebele, H. and Wetzler, A. and Anticic, T. and Kadija, K. and Nicolic, V. and Susa, T. and Baatar, B. and Kolesnikov, V. I.},
abstractNote = {Results are presented from a search for the decays D{sup 0}{yields}K{sup -}{pi}{sup +} and D{sup 0}{yields}K{sup +}{pi}{sup -} in a sample of 3.8x10{sup 6} central Pb-Pb events collected with a beam energy of 158A GeV by NA49 at the CERN SPS. No signal is observed. An upper limit on D{sup 0} production is derived and compared to predictions from several models.},
doi = {10.1103/PhysRevC.73.034910},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}
  • Results are presented on {omega} production in central Pb+Pb collisions at 40 and 158A GeV beam energy. For the first time in heavy ion reactions, rapidity distributions and total yields were measured for the sum {omega}{sup -}+{omega}{sup +} at 40A GeV and for {omega}{sup -} and {omega}{sup +} separately at 158A GeV. The yields are strongly underpredicted by the string-hadronic UrQMD model but agree better with predictions from hadron gas models.
  • No abstract prepared.
  • Results on {lambda},{lambda},{xi}{sup -}, and {xi}{sup +} production in central Pb+Pb reactions at 20A,30A,40A,80A, and 158A GeV are presented. The energy dependence of transverse mass spectra, rapidity spectra, and multiplicities is discussed. Comparisons to string hadronic models (UrQMD and HSD) and statistical hadron gas models are shown. Although the latter provide a reasonable description of all particle yields, the first class of models fails to match the {xi}{sup -} and {xi}{sup +} multiplicities.
  • Production of the K*(892)0 and K̄*(892)⁰ resonances was studied via their K⁺π⁻ and K⁻π⁺ decay modes in central Pb+Pb, Si+Si, C+C, and inelastic p+p collisions at 158A GeV(√( sNN)=17.3 GeV) with the NA49 detector at the CERN SPS. Transverse momentum and rapidity distributions were measured and total yields were estimated. The yield of K* exceeds that of K̄* by about a factor of two in nucleus-nucleus reactions. The total yield ratios ⟨K*⟩/⟨K+⟩ and ⟨K̄*⟩/⟨K-⟩ are strongly suppressed in central Pb+Pb compared to p+p, C+C, and Si+Si collisions, in agreement with the expected attenuation of these short-lived resonance states in themore » hadronic phase of the expanding fireball. The UrQMD model, although incorporating such a scenario, does not provide a quantitative description of the experimental results. The statistical hadron gas model assuming the same freeze-out parameters for stable hadrons and resonances overestimates the ⟨K*⟩/⟨K⟩ ratios in central Pb+Pb collisions by about a factor of 2.5.« less
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  • Measurements of Bose-Einstein correlations of {pi}{sup -}{pi}{sup -} pairs in central Pb+Pb collisions were performed with the NA49 detector at the CERN Super Proton Synchroton for beam energies of 20A,30A,40A,80A, and 158A GeV. Correlation functions were measured in the longitudinally comoving 'out-side-long' reference frame as a function of rapidity and transverse momentum in the forward hemisphere of the reaction. Radius and correlation strength parameters were obtained from fits of a Gaussian parametrization. The results show a decrease of the radius parameters with increasing transverse-momentum characteristic of strong radial flow in the pion source. No striking dependence on pion-pair rapidity ormore » beam energy is observed. Static and dynamic properties of the pion source are obtained from simultaneous fits with a blast-wave model to radius parameters and midrapidity transverse-momentum spectra. Predictions of hydrodynamic and microscopic models of Pb+Pb collisions are discussed.« less