Voltar
Artigo
BIBTEX RIS

Prompt muon production in e + e − annihilations at 29 GeV

1985; American Physical Society; Volume: 31; Issue: 11 Linguagem: Inglês

10.1103/physrevd.31.2719

ISSN

1538-4500

Autores

H. Aihara, M. Alston‐Garnjost, D. H. Badtke, J. A. Bakken, A. Barbaro‐Galtieri, A. V. Barnes, B. A. Barnett, H.-U. Bengtsson, B. J. Blumenfeld, A. D. Bross, C. D. Buchanan, O. Chamberlain, C.Y. Chien, A. R. Clark, A. Cordier, O. I. Dahl, C. T. Day, K. A. Derby, Philippe Eberhard, D. L. Fancher, H. Fujii, H. Fujii, B. Gabioud, J. W. Gary, W. Gorn, Nicholas John Hadley, J. M. Hauptman, W. Hofmann, J. Huth, J. Hylen, T. Kamae, H. S. Kaye, Robert W. Kenney, L. T. Kerth, R. I. Koda, R. Kofler, K. K. Kwong, J. G. Layter, C. S. Lindsey, S. C. Loken, X‐Q. Lu, G. Lynch, L. Madansky, R. J. Madaras, K. Maruyama, J. N. Marx, J. A. J. Matthews, S. O. Melnikoff, W. Moses, P. Némethy, D. R. Nygren, P. J. Oddone, D. A. Park, A. Pevsner, M. Pripstein, P. R. Robrish, M. T. Ronan, R. R. Ross, F. Rouse, R. R. Sauerwein, G. Shapiro, M. Shapiro, B. C. Shen, W. Slater, M. L. Stevenson, D. H. Stork, H. K. Ticho, N. Toge, R. F. van Daalen Wetters, G. J. VanDalen, R. van Tyen, E. M. Wang, M. Wayne, W. A. Wenzel, H. Yamamoto, M. Yamauchi, W-M. Zhang,

Tópico(s)

Quantum Chromodynamics and Particle Interactions

Resumo

We have studied the production of prompt muons in hadronic events from e+e− annihilation at a center-of-mass energy of 29 GeV with the PEP4-TPC (Time Projection Chamber) detector. The muon p and pt distributions are well described by a combination of bottom- and charm-quark decays, with fitted semimuonic branching fractions of (15.2±1.9±1.2)% and (6.9±1.1±1.1)%, respectively. The muon spectra imply hard fragmentation functions for both b and c quarks, with 〈z(b quark)〉=0.80±0.05±0.05 and 〈z(c quark)〉=0.60±0.06±0.04. We derive neutral-current axial-vector couplings of a(b quark)=-0.9±1.1±0.3 and a(c quark)=1.5±1.5±0.5 from the forward-backward asymmetries.Received 17 January 1985DOI:https://doi.org/10.1103/PhysRevD.31.2719©1985 American Physical Society

Referência(s)