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Experiments at VEPP-2M with SND detector

The SND collaboration Achasov, M.N. ; Aulchenko, V.M. ; Baru, S.E. ; et al.
BINP-98-65, 1998.
Inspire Record 476386 DOI 10.17182/hepdata.50374

Short overview of experiments with SND detector at VEPP-2M e^+e^- collider in the energy range 2E = 400 - 1400 MeV and preliminary results of data analysis are presented.

4 data tables match query
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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rivet Analysis
The Measurement of R in e+ e- annihilation at center-of-mass energies between 7.2-GeV and 10.34-GeV

Blinov, A.E. ; Blinov, V.E. ; Bondar, A.E. ; et al.
Z.Phys.C 70 (1996) 31-38, 1996.
Inspire Record 364141 DOI 10.17182/hepdata.14321

The total cross section of the processe+e− →hadrons has been measured in the center-of-mass energy range between 7.25 and 10.34 GeV using the MD-1 detector at the VEPP-4 collider. The ratioR=σ(e+e− →hadrons)/σ(e+e− →μ+μ−) was found to be constant in this energy range with the average value of 3.58±0.02±0.14.

2 data tables match query
Table 1

Statistical errors only.

Table 2

Mean value of R in the range 7.25 to 10.34 GeV.


rivet Analysis
Measurement of inclusive Lambda production in electron - positron interactions at the upsilon energies

Blinov, A.E. ; Blinov, V.E. ; Bondar, A.E. ; et al.
Z.Phys.C 62 (1994) 367-370, 1994.
Inspire Record 362599 DOI 10.17182/hepdata.14205

Using the MD-1 detector at the VEPP-4e+e− strorage ring we have measured the inclusive Λ and370-1 production rates in direct Γ(1S) decays

4 data tables match query
Table 1

Lambda x spectrum in direct upsilon(1S) decay.

Table 2

Lambda multiplicity in direct upsilon(1S) decays.

Table 3

Lambda multiplicity in surrounding continuum.

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The search for narrow resonances in the reaction e+ e- ---> hadrons at center-of-mass energy range between 7.23-GeV and 10.34-GeV

Blinov, A.E. ; Blinov, V.E. ; Beilin, M.V. ; et al.
Z.Phys.C 49 (1991) 239-243, 1991.
Inspire Record 316888 DOI 10.17182/hepdata.15083

The results of a search for narrow resonances ine+e− annihilation at centre-of-mass energies between 7.23 and 10.34 GeV are presented. The experiment was performed using the MD-1 detector at the VEPP-4 storage ring. The total luminosity integral of 16 pb−1 was taken. There is no evidence that new states exist. The upper limits on the leptonic widthΓee of possible resonances are less, by a factor of 10–80, than theΓee for the ϒ(1S) meson.

1 data table match query
Table 1

Average R value (excluding upsilon region).


Investigation of the reaction pi- p ---> eta n at momenta up to 40-GeV/c

The Serpukhov-CERN collaboration Apel, W.D. ; Bertolucci, E. ; Bushnin, Yu.B. ; et al.
Sov.J.Nucl.Phys. 25 (1977) 194-197, 1977.
Inspire Record 118649 DOI 10.17182/hepdata.19079

None

1 data table match query
Table 1

No description provided.


Threshold structure of the quasifree p + n --> d + eta reaction.

Calen, H. ; Dyring, J. ; Fransson, K. ; et al.
Phys.Rev.Lett. 80 (1998) 2069-2072, 1998.
Inspire Record 468434 DOI 10.17182/hepdata.19524

The quasifree p+n→d+η reaction cross section has been measured at the threshold using 1295 MeV protons in the CELSIUS storage ring and an internal cluster-jet deuterium target. The kinematics is chosen such that the target proton can be assumed to be a spectator. The Fermi momentum of the target neutron is used to extract the energy dependence of the cross section by reconstructing the kinematics on an event-by-event basis. The data cover excess energies from threshold to 10 MeV in the center of mass of the final dη system. Approaching the threshold the cross section is enhanced compared to what is expected from phase space. This behavior is typical for a strong final-state interaction.

1 data table match query
Table 1

Cross section as a function of the C.M. excess energy.


Measurement of x F3, F2 structure functions and Gross-Llewellyn-Smith sum rule with IHEP-JINR neutrino detector.

The IHEP-JINR Neutrino Detector collaboration Barabash, L.S. ; Baranov, S.A. ; Batusov, Yu.A. ; et al.
JINR-E1-96-308, 1996.
Inspire Record 426123 DOI 10.17182/hepdata.41668

The isoscalar structure functions xF_3 and F_2 are measured as functions of x averaged over all Q~2 permissible for the range 6 to 28 GeV of incident (anti)neutrino energy. With the measured values of xF_3, the value of the Gross-Llewellyn Smith sum rule is found to be $\int_{0}~{1}{F_3 dx} = 2.13\pm0.38 (stat)\pm 0.26 (syst)$. The QCD analysis of xF_3 provides $\Lambda_{\overline{MS}} =358 \pm 59 MeV$ . The obtained value of the strong interaction constant $\alpha_S (M_Z)=0.120~{+3}_{-4}$ is larger than most of the deep inelastic scattering results.

1 data table match query
Table 1

The value of F2 is extracted with R = 0. The difference F2(C=R=.1)-F2(C=R=0.) is also presented.


Study of Quasielastic Reactions Neutrino $n \to \mu^- p$ and Anti-neutrino $p \to \mu^+ n$ in Bubble Chamber Skat at 3-{GeV} to 20-{GeV}

Grabosch, H.J. ; Kaufmann, K.K. ; Krecker, U. ; et al.
Sov.J.Nucl.Phys. 47 (1988) 1032-1034, 1988.
Inspire Record 239545 DOI 10.17182/hepdata.40876

None

4 data tables match query
Table 1

No description provided.

Table 2

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Reaction $\pi^- p \to \eta n$ in the 15-{GeV}/$c$ to 40-{GeV}/$c$ Momentum Range

The Serpukhov-CERN collaboration Apel, W.D. ; Augenstein, K.H. ; Bertolucci, E. ; et al.
Nucl.Phys.B 152 (1979) 1, 1979.
Inspire Record 133409 DOI 10.17182/hepdata.41487

A high-statistics measurement of the reaction π − p→ η n; η →2 γ has been performed at the 70 GeV Serpukhov accelerator for 15, 20, 25, 30 and 40 GeV/ c incident pion momentum using the NICE set-up with its associated 648-channel hodoscope spectrometer for γ-ray detection. It is found that the spin-flip and non-spin-flip amplitudes can be parametrized, for small | t |, as exponentials with the same slopes to within a few percent. For | t | ≳ 1 (GeV/ c ) 2 there is a break in the differential cross section. In addition, the A 2 effective trajectory deviates markedly for | t | ≳ 1 GeV/ c ) 2 from the linear behaviour valid for smaller | t |.

3 data tables match query
Table 1

No description provided.

Table 2

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Table 3

No description provided.


Measurement of xF3 and F2 structure functions in low Q**2 region with the IHEP-JINR neutrino detector.

The IHEP-JINR Neutrino Detector collaboration Sidorov, A.V. ; Anykeev, V.B. ; Batusov, Y.A. ; et al.
Eur.Phys.J.C 10 (1999) 405-408, 1999.
Inspire Record 500337 DOI 10.17182/hepdata.43397

The isoscalar structure functions $xF_3$ and $F_2$ are measured as functions of $x$ averaged over all $Q^2$ permissible for the range of 6 to 28 GeV of incident neutrino (anti-neutrino) energy at the IHEP-JINR Neutrino Detector. The QCD analysis of $xF_3$ structure function provides $\Lambda_{\bar{MS}}^{(4)} = (411 \pm 200)$ MeV under the assumption of QCD validity in the region of low $Q^2$. The corresponding value of the strong interaction constant $\alpha_S (M_Z) = 0.123^{+0.010}_{-0.013}$ agrees with the recent result of the CCFR collaboration and with the combined LEP/SLC result.

2 data tables match query
Table 1

No description provided.

Table 2

No description provided.