05 4 v 1 1 8 A ug 1 99 9 UCTP - 112 - 99 RECENT CHARM RESULTS FROM FERMILAB EXPERIMENT
نویسنده
چکیده
Fermilab experiment E791 studied weak decays of D + , D + s , and D 0 mesons produced in collisions of 500 GeV/c negative pions with Pt and C targets. The experiment collected over 200 000 fully reconstructed charm decays. Four recent results are discussed here: (a) measurement of the form factor ratios V /A 1 , A 2 /A 1 , and A 3 /A 1 in D + → K * 0 ℓ + ν ℓ and D + s → φ ℓ + ν ℓ decays; (b) measurement of the difference in decay widths ∆Γ between the two D 0 /D 0 mass eigenstates; (c) search for rare and forbidden D decays to dilepton final states; and (d) search for a " Pentaquark, " a bound state of ¯ csuud.
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تاریخ انتشار 1999