Study of charm production in Z decays
European Physical Journal C, ISSN: 1434-6044, Vol: 16, Issue: 4, Page: 597-611
2000
- 78Citations
- 25Usage
- 22Captures
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Metrics Details
- Citations78
- Citation Indexes78
- CrossRef78
- Usage25
- Downloads22
- Abstract Views3
- Captures22
- Readers22
- 22
Article Description
The production rates of D, D, D, D/D̄, D, and Λ / Λ̄ in Z → cc̄ decays are measured using the LEP I data sample recorded by the ALEPH detector. The fractional energy spectrum of the D* is well described as the sum of three contributions: charm hadronisation, b hadron decays and gluon splitting into a pair of heavy quarks. The probability for a c quark to hadronise into a D* is found to be f(c → D) = 0.233 ± 0.010 (stat.) ± 0.011(syst.). The average fraction of the beam energy carried by D* mesons in Z → cc̄ events is measured to be 〈X(D*)〉cc̄ = 0.4878 ± 0.0046(stat.) ± 0.0061(syst.). The D* energy and the hemisphere mass imbalance distributions are simultaneously used to measure the fraction of hadronic Z decays in which a gluon splits to a cc̄ pair: n̄ = (3.23 ± 0.48(stat.) ± 0.53(syst.))%. The ratio of the Vector/(Vector+Pseudoscalar) production rates in charmed mesons is found to be P = 0.595 ±0.045. The fractional decay width of the Z into cc̄ pairs is determined from the sum of the production rates for various weakly decaying charmed states to be R = 0.1738 ± 0.0047(stat.) ± 0.0116(syst.).
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0000139912&origin=inward; http://dx.doi.org/10.1007/s100520000421; http://link.springer.com/10.1007/s100520000421; http://link.springer.com/content/pdf/10.1007/s100520000421; http://link.springer.com/content/pdf/10.1007/s100520000421.pdf; http://link.springer.com/article/10.1007/s100520000421/fulltext.html; https://ink.library.smu.edu.sg/sis_research/5860; https://ink.library.smu.edu.sg/cgi/viewcontent.cgi?article=6863&context=sis_research; https://link.springer.com/article/10.1007%2Fs100520000421; http://www.springerlink.com/index/10.1007/s100520000421; http://www.springerlink.com/index/pdf/10.1007/s100520000421; https://dx.doi.org/10.1007/s100520000421; https://link.springer.com/article/10.1007/s100520000421
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