The results of the SERP-E-184 experiment at the U-70 accelerator (IHEP, Protvino) are presented. Interactions of the 70GeV proton beam with carbon, silicon and lead targets were studied to detect ...decays of charmed D 0 , D ¯ 0 , D + , D - mesons and Λ c + baryon near their production threshold. Measurements of lifetimes and masses have shown a good agreement with PDG data. The inclusive cross-sections of charm production and their A-dependences have been obtained. The yields of these particles are compared with the theoretical predictions and the data of other experiments. The measured cross-section of the total open charm production ( σ tot ( c c ¯ ) = 7 . 1 ± 2 . 3 ( stat ) ± 1 . 4 ( syst ) μb/nucleon) at the collision c.m. energy √ s = 11 . 8 GeV is well above the QCD model predictions. The contributions of different kinds of charmed particles to the total cross-section of the open charm production in proton-nucleus interactions vary with energy.
.
The results of the SERP-E-184 experiment at the U-70 accelerator (IHEP, Protvino) are presented. Interactions of the 70GeV proton beam with carbon, silicon and lead targets were studied to detect ...decays of charmed
D
0
,
D
¯
0
,
D
+
,
D
-
mesons and
Λ
c
+
baryon near their production threshold. Measurements of lifetimes and masses have shown a good agreement with PDG data. The inclusive cross-sections of charm production and their
A
-dependences have been obtained. The yields of these particles are compared with the theoretical predictions and the data of other experiments. The measured cross-section of the total open charm production (
σ
tot
(
c
c
¯
)
=
7
.
1
±
2
.
3
(
stat
)
±
1
.
4
(
syst
)
μb/nucleon) at the collision c.m. energy
√
s
=
11
.
8
GeV is well above the QCD model predictions. The contributions of different kinds of charmed particles to the total cross-section of the open charm production in proton-nucleus interactions vary with energy.
The features of the associated production of {phi} mesons and neutral kaons are studied on the basis of data obtained at the EXCHARM spectrometer (Serpukhov accelerator) in neutron-carbon ...interactions at neutron-beam energies in the range 20-70 GeV. The cross section for the inclusive associated production of {phi} and K{sup 0}/-K{sup 0} is obtained. The fraction of processes allowed by the Okubo-Zweig-Iizuka rule is estimated in the reactions of {phi}-meson inclusive production.
The influence of titanium alloying (Ti content of 0, 0.2, 0.3, and 0.4 wt %) on the nanostructure of yttrium oxide (Y
2
O
3
) dispersion strengthened steel with a composition Fe-13.5% Cr-2% W-0.3% Y
...2
O
3
is investigated. The spatial distribution of chemical elements is analyzed in the investigated volumes. The matrix composition and average size and concentration of nanoscale clusters are compared for different samples. It is shown that the average nanocluster size (∼3 nm) is almost unchanged with increasing Ti concentration, while the cluster concentration grows from ∼1 × 10
23
m
−3
(for Ti-free steel) to ∼1.5 × 10
24
m
−3
(for 0.4 wt % Ti alloy).
New precise data of the \(\Lambda^0\) polarization are obtained in the EXCHARM experiment at the Serpukhov accelerator. The \(\Lambda^0\)s have been produced in nC interactions in the neutron energy ...interval 40–70 GeV and detected in the kinematic range of \(0.1\lesssim x_{\mathrm{F}} \lesssim 0.6\) and \(0.2\le p_{\mathrm{t}} \le 1.2\) GeV/c. The obtained results are compared with other measurements in the pp and pA interactions.
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