HEPData Search

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CHARM PHOTOPRODUCTION AT 20-GeV

The SLAC Hybrid Facility Photon collaboration Abe, K. ; Bacon, T.C. ; Ballam, Joseph ; et al.

Phys.Rev.D 30 (1984) 1, 1984.

Inspire Record 194546 DOI 10.17182/hepdata.23639

Sixty-two charm events have been observed in an exposure of the SLAC Hybrid Facility toa backward sacttered laser beam. Based on 22 neutral and 21 charged decays we have measured the charmed-meson lifetimes to be τD0=(6.8−1.8+2.3)×10−13 sec, τD±=(7.4−2.0+2.3)×10−13 sec and their ratio τD±τD0=1.1−0.3+0.6. The inclusive charm cross section at a photon energy of 20 GeV has been measured to be 56−23+24 nb. Evidence is presented for a non-DD¯ component to charm production, consistent with (35±20)% Λc+ production and some D*± production. We have found no unambiguous F decays.

1 data table

Table 1

No description provided.

INELASTIC SCATTERING OF DEUTERONS ON CARBON AT 8.9-GeV/c. (IN RUSSIAN)

Ableev, V.g. ; Vorobev, G.g. ; Vizireva, L. ; et al.

Yad.Fiz. 37 (1983) 348-352, 1983.

Inspire Record 192434 DOI 10.17182/hepdata.17712

None

1 data table

Table 1

No description provided.

DIFFRACTIVE K0 LAMBDA0 PRODUCTION BY NEUTRONS WITH 40-GeV/c MEAN MOMENTUM

The BIS-2 collaboration Aleev, A.N. ; Arefev, V.A. ; Balandin, V.P. ; et al.

PHE 83-1, 1983.

Inspire Record 190017 DOI 10.17182/hepdata.31222

None

1 data table

Table 1

No description provided.

EXPERIMENTAL STUDIES OF THE SIGMA, T, P POLARIZATION PARAMETERS AND THE GAMMA P ---> P PI0 REACTION MULTIPOLE ANALYSIS IN THE FIRST RESONANCE REGION

Belyaev, A.a. ; Getman, V.a. ; Gorbenko, V.g. ; et al.

Nucl.Phys.B 213 (1983) 201-222, 1983.

Inspire Record 192457 DOI 10.17182/hepdata.34021

A description is given of the experimental techniques and investigation results of the parameters Σ , T , P for the γ p→p π 0 reaction using linear polarized photons and a polarized proton target. The measurements have been made in the photon energy range 280–450 MeV at pion c.m. angles between 60° and 135°. The new experimental data are used in an energy-independent channel multipole analysis without the Watson theorem.

8 data tables

Table 1

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DELTA ISOBAR EXCITATION IN CARBON NUCLEI AT 4.4-GEV/C - 10.7-GEV/C IN CHARGE EXCHANGE REACTION (HE-3, T).

The DUBNA-MOSCOW-KIEV-DUSHANBE collaboration Ableev, V.G. ; Kobushkin, A.P. ; Kurepin, A.B. ; et al.

Conf.Proc.C 830821V2 (1983) 267-268, 1983.

Inspire Record 194973 DOI 10.17182/hepdata.39517

None

2 data tables

Table 1

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DIFFRACTIVE PRODUCTION OF A NARROW BARYON IN NEUTRON CARBON INTERACTIONS

The BIS-2 collaboration Aleev, A.N. ; Arefev, V.A. ; Balandin, V.P. ; et al.

Dubna Jinr - 83-602 (83,REC.NOV.) 6p, 1983.

Inspire Record 196394 DOI 10.17182/hepdata.39600

None

6 data tables

Table 1

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MEASUREMENT OF THE SPECTATOR PROTON YIELD AT 0 ANGLE IN THE DEUTERON STRIPPING REACTION ON CARBON AT 8.9-GeV/c. (IN RUSSIAN)

Ableev, V.g. ; Vorobev, G.g. ; Zaporozhets, S.a. ; et al.

Yad.Fiz. 37 (1983) 132-136, 1983.

Inspire Record 192436 DOI 10.17182/hepdata.38079

The invariant cross section of the reaction of deuteron stripping on carbon target has been measured at a deuteron momentum of 8.9 GeV/c. The cross section is obtained at a zero detection angle of the stripping proton: E/p2xd2σ/dpdΩ=(281+-9)xbxGeV/srx(GeV/c)3. This value is consistent with the one calculated in the framework of the Bertocci-Treleani model of deuteron fragmentation. When the method of Nissen-Meyer is used for orthogonalization of the wave functions of primary deuteron and the (np) system, resulting from its disintegration, a similar calculation gives the result, which is 1.4 times larger than the measured value. Distribution in the cosine of angle of proton yield at the fixed proton momentum p turned out to be near to isotropy one and distribution in p at the fixed cos theta has the maximum at p=50 MeV/c

3 data tables

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INCLUSIVE K0(S) LAMBDA AND anti-LAMBDA PRODUCTION IN anti-p p INTERACTIONS AT 22.4-GeV/c

The Alma Ata-Dubna-Helsinki-Moscow-Prague-Tbilisi collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Gramenitsky, I.M. ; et al.

Z.Phys.C 25 (1984) 213, 1984.

Inspire Record 194651 DOI 10.17182/hepdata.2004

InclusiveKs0, Λ and$\bar \Lambda$-production has been investigated in$\bar p$p-interactions at 22.4 GeV/c. Total and topological cross sections and multiplicity characteristics of neutral strange particles have been determined. DifferentialKs0 and Λ-cross sections and also characteristics of annihilation processes with neutral kaon production have been studied. It is shown that the difference of the shapes of the invariantx-distributions forK-mesons in the fragmentation region for annihilation and non-annihilation processes can be described in the framework of the “dual” valon model, but not by considering the current (undressed) quark recombination mechanisms only. The polarization of Λ and$\bar \Lambda$-hyperons has been measured.

4 data tables

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