Production of {pi}{sup +}, K{sup +}, K{sup 0}, K{sup {asterisk}0}, {phi}, p and {Lambda}{sup 0} in hadronic Z{sup 0} decays
Journal Article
·
· Physical Review, D
OSTI ID:328565
more »
- Adelphi University, South Avenue, Garden City, New York 11530 (United States)
- Aomori University, 2-3-1 Kohata, Aomori City, 030 (Japan)
- INFN Sezione di Bologna, Via Irnerio 46 I-40126 Bologna (Italy)
- Brunel University, Uxbridge, Middlesex, UB8 3PH (United Kingdom)
- Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215 (United States)
- University of Cincinnati, Cincinnati, Ohio 45221 (United States)
- University of Colorado, Campus Box 390, Boulder, Colorado 80309 (United States)
- Columbia University, Nevis Laboratories P. O. Box 137, Irvington, New York 10533 (United States)
- Colorado State University, Ft. Collins, Colorado 80523 (United States)
- INFN Sezione di Ferrara, Via Paradiso, 12, I-44100 Ferrara (Italy)
- Lab. Nazionali di Frascati, Casella Postale, 13 I-00044 Frascati (Italy)
- University of Illinois, 1110 West Green Street, Urbana, Illinois 61801 (United States)
- Lawrence Berkeley Laboratory, Department of Physics, 50B-5211, University of California, Berkeley, California 94720 (United States)
- Louisiana Technical University, Ruston, Louisiana 71272 (United States)
- University of Massachusetts, Amherst, Massachusetts 01003 (United States)
We have measured the differential production cross sections as a function of scaled momentum x{sub p}=2p/E{sub c.m.} of the identified hadron species {pi}{sup +}, K{sup +}, K{sup 0}, K{sup {asterisk}0}, {phi}, p, {Lambda}{sup 0}, and of the corresponding antihadron species in inclusive hadronic Z{sup 0} decays, as well as separately for Z{sup 0} decays into light (u, d, s), {ital c} and {ital b} flavors. Clear flavor dependences are observed, consistent with expectations based upon previously measured production and decay properties of heavy hadrons. These results were used to test the QCD predictions of Gribov and Lipatov, the predictions of QCD in the modified leading logarithm approximation with the ansatz of local parton-hadron duality, and the predictions of three fragmentation models. The ratios of production of different hadron species were also measured as a function of x{sub p} and were used to study the suppression of strange meson, strange and non-strange baryon, and vector meson production in the jet fragmentation process. The light-flavor results provide improved tests of the above predictions, as they remove the contribution of heavy hadron production and decay from that of the rest of the fragmentation process. In addition we have compared hadron and antihadron production as a function of x{sub p} in light quark (as opposed to antiquark) jets. Differences are observed at high x{sub p}, providing direct evidence that higher-momentum hadrons are more likely to contain a primary quark or antiquark. The differences for pseudoscalar and vector kaons provide new measurements of strangeness suppression for high-x{sub p} fragmentation products. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 328565
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 59; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Production of {pi}{sup {+-}}, K{sup {+-}}, K{sup 0}, K*{sup 0}, {phi}, p and {Lambda}{sup 0} in hadronic Z{sup 0} decays
Production of Charged {pi}{sup {+-}}, {Kappa}{sup {+-}} and p/p in Hadronic Z{sup 0} Decays
Production of Pi+-, K+/- and P/Anti-P in Hadronic Z0 Decays
Conference
·
Sun Jun 01 00:00:00 EDT 1997
·
OSTI ID:521614
Production of Charged {pi}{sup {+-}}, {Kappa}{sup {+-}} and p/p in Hadronic Z{sup 0} Decays
Technical Report
·
Fri Jul 09 00:00:00 EDT 1999
·
OSTI ID:10088
Production of Pi+-, K+/- and P/Anti-P in Hadronic Z0 Decays
Technical Report
·
Wed Sep 06 00:00:00 EDT 2000
·
OSTI ID:765057