Mostrando 221 - 240 Resultados de 16,682 Para Buscar '"quarks"', tiempo de consulta: 0.25s Limitar resultados
  1. 221
    por Winer, B L
    Publicado 1995
    “…In April of 1994,CDF presented direct evidence for the existence of the top quark. Employing techniques similar to those we previously published,we observe a signal consistent with tt decay to WWbb, but inconsistent with the background prediction. …”
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  2. 222
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  4. 224
    “…We study the changes produced by the deuteron on the QCD quark condensate by means the Feynman-Hellmann theorem and find that the pion mass dependence of the pion-nucleon coupling could play an important role. …”
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  5. 225
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  7. 227
    por Buchalla, Gerhard
    Publicado 2002
    “…We discuss the formalism of effective weak Hamiltonians, heavy quark effective theory, the heavy quark expansion for inclusive decays of b-hadrons and, finally, the more recent ideas of QCD factorization for exclusive nonleptonic B decays. …”
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  8. 228
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  10. 230
    por Cacciari, Matteo, Gardi, Einan
    Publicado 2003
    “…We study perturbative and non-perturbative aspects of heavy-quark fragmentation into hadrons, emphasizing the large-x region, where x is the energy fraction of the detected hadron. …”
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  11. 231
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  13. 233
    por Crochet, P
    Publicado 2001
    “…SQM2001, 6th International Conference on Strange Quarks in Matter, Frankfurt, Germany, 24-29 September 2001…”
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  14. 234
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  18. 238
    “…The pentaquark state recently discovered has been discussed based on various quark model calculations. Odd parity for the state can not be ruled out theoretically because contributions related to non-trivial color structures have not been studied completely. …”
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  19. 239
    por Jaffe, R, Wilczek, F
    Publicado 2004
    “…"Pentaquarks do not fit into the traditional quark model of hadrons, but understanding these exotic new particles is offering fresh insights into the subtleties of the strong interaction" (6 pages)…”
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  20. 240
    “…The features of a model interpreting the light scalar mesons as diquark-antidiquark bound states and the consequences of its natural extension to include heavy quarks are briefly reviewed.…”
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