IHEP 2010 - 5 (In English)
N.M.Agababyan (JINR, Dubna, Russia),
[V.V.Ammosov], A.A.Ivanilov, V.A.Korotkov (IHEP, Protvino, Russia),
N.Grigoryan, G.Gulkanyan, Zh.Karamyan
(Yerevan Physics Institute, Armenia)
A Study of the Neutrino Production
of φ and D+s Mesons
|Protvino, 2010. –
p. 11, figs. 3,
tables 1, refs.: 16.
The charged current neutrino production of φ and D+s mesons is
studied, using the data obtained with the SKAT bubble chamber
exposed to the Serpukhov accelerator neutrino beam.
It is found that the φ production
occurs predominantly in the forward hemisphere of the hadronic
c.m.s. (at xF > 0, xF being the Feynman variable),
mean yield strongly exceeding the expected yield of directly
produced φ mesons and varying from
〈 nφ(xF > 0)
〉 = (0.92±0.34) ⋅ 10-2 at W > 2 GeV up to
(1.23±0.53) ⋅ 10-2 at W > 2.6 GeV and
(1.44±0.69)⋅ 10-2 at W > 2.9 GeV, W being the invariant mass of
the hadronic system.
For the first time,
the inclusive yield of leading D+s mesons carrying
more than z = 0.85 of the current c-quark energy is
〈 nD+s(z > 0.85, W > 2.9 GeV) 〉
= (6.64±1.91) ⋅ 10-2.
It is shown, that
the shape of
measured φ meson differential spectrum on xF
is reproduced by that
expected from the D+s → φ X decays.
An indication was obtained that this expected spectrum underestimates
the measured φ yield.