O.L. Klimov

Limits on neutral light scalar and pseudoscalar particles in a proton beam dump experiment

A search has been performed for weakly interacting neutral light scalar and pseudoscalar particles in a proton beam dump experiment. No positive signal is observed. Limits on the mass and life-time of these particles are set in the frame of the Standard Model and its minimal supersymmetric extension. The Higgs particle of theSU2L×U1 Standard Theory is excluded for masses in the range 1 MeV<mH<80 MeV at 95%CL. Limits on the Peccei-Quinn like axions are derived.

Search for heavy neutrinos at the IHEP-JINR neutrino detector

Abstract Data from a proton beam-dump experiment at the 70 GeV Serpukhov accelerator were analysed to search for heavy neutrino decays ν H → e + e − ν e at the IHEP-JINR Neutrino Detector. No signal over background was found. The upper limits on the elements if a mixing matrix | U eH | 2 in the mass range 5 m νH U eH || U μH | in the mass range 3 m νH

LIMITS ON THE MASS OF LIGHT (PSEUDO)SCALAR PARTICLES FROM BETHE-HEITLER e+e− and μ+μ− PAIR PRODUCTION IN A PROTON-IRON BEAM DUMP EXPERIMENT

A search has been performed for weakly interacting neutral light scalar and pseudoscalar particles in a proton-iron beam dump experiment via the Bethe-Heitler process. No positive signal was observed. Limits are derived on the masses of these particles in the framework of the Standard Model and its minimal supersymmetric extension (MSSM) comparing the experimental results with expectations for Bethe-Heitler e+e− and μ+μ− pair production. The Higgs particle of the SU2L×U1 Standard Theory is excluded for masses in the range mH<0.9 MeV at 95% CL. Limits on light Higgs particles of the MSSM and Peccei-Quinn like axions are derived.

Measurement of the \(xF_3\) and \(F_2\) structure functions in the low \(Q^2\) region with the IHEP-JINR neutrino detector

Abstract. The isoscalar structure functions

The IHEP-JINR neutrino detector at neutrino beams of the U-70 accelerator (Protvino)

xF_3

The search for inclusive electron-neutrino oscillations on the Serpukhov 70 GeV accelerator with the IHEP-JINR neutrino detector

and

Investigation of prompt electron-neutrino production in a proton beam dump experiment with the IHEP-JINR ν detector

F_2

Mass limits on a light Higgs boson from π-, K-, η′ -meson decays in the 70 GeV proton beam-dump experiment

are measured as functions of x averaged over all

Measurement of χF3 and F2 structure functions in low Q2 region with the IHEP-JINR neutrino detector

Q^2

Determination of the high-twist contribution to the structure function xFνN3

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 the