Neutrino physics with the Baksan Underground Scintillation Telescope

The neutrino experiment at the Baksan Underground Scintillation Telescope is operating for 35 years. We present an updated analysis of observed upward through-going muons in searches for a signal from dark matter annihilations in the Sun and the astrophysical local sources

Low prevalence of Wolbachia infection in Ukrainian populations of Drosophila

Aim. The aim of this study was to determine the Wolbachia infection prevalence among Drosophila species that are common in Ukraine. Methods. The total of 203 imago, representatives of seven Drosophila species collected from seven localities in Ukraine were screened for Wolbachia via PCR assay. Results. We found Wolbachia infection only in one individual of Drosophila testacea that was collected in the Chornobyl Exclusion Zone. Conclusions. In Ukraine, the examined Drosophila species are characterised by a low prevalence of Wolbachia infection. This research, together with previously reported infections in D. melanogaster and D. simulans populations, indicate that Wolbachia infects 3 out of 9 Drosophila species surveyed in Ukraine

Temperature control system of two section electron LINAC-40

The temperature control system of the accelerator provides thermal stabilization of the two accelerating sections and the injector. The system consists of 7 temperature-sensitive elements, up to 8 transducers of water flow through the objects being cooled and the detector of the water level in the tank. The microprocessor complex ADAM 5511 and the commercial thyristor controllers are used for analysis of signals from the transducers and for temperature control. Information of the process parameters is displayed on the local control desk, as well as, via the RS-485 port is transferred to the accelerator control room.Система термостатирования ускорителя ЛУЭ-40, обеспечивает термостабилизацию двух ускоряющих секций и инжектора. В системе термостатирования имеется 7 датчиков измерения температуры, до 8 датчиков протока воды через охлаждаемые объекты и датчик уровня воды в баке. Для анализа сигналов от датчиков и регулирования температуры используется микропроцессорный комплекс АДАМ 5511 и тиристорные регуляторы РОТ-63. Информация о параметрах процессов выдается на местный пульт управления, а также через порт RS-485 в РС оператора ускорителя.Система термостатування прискорювача ЛПЕ-40, забезпечує термостабілізацію двох прискорюючих секцій та інжектора. У системі термостатування є 7 датчиків вимірювання температури, до 8 датчиків протоку води крізь охолоджувані об’єкти та датчик рівня води у баці. Для аналізу сигналів від датчиків та регулювання температури використовується мікропроцесорний комплекс АДАМ 5511 та тиристорні регулятори РОТ-63. Інформація о параметрах процесів видається на локальний пульт управління, а також через порт RS-485 у РС оператора прискорювача

Contributions from SUSY-FCNC couplings to the interpretation of the HyperCP events for the decay \Sigma^+ \to p \mu^+ \mu^-

The observation of three events for the decay $\Sigma^+ \to p \mu^+ \mu^-$ with a dimuon invariant mass of $214.3\pm0.5$MeV by the HyperCP collaboration imply that a new particle X may be needed to explain the observed dimuon invariant mass distribution. We show that there are regions in the SUSY-FCNC parameter space where the $A^0_1$ in the NMSSM can be used to explain the HyperCP events without contradicting all the existing constraints from the measurements of the kaon decays, and the constraints from the $K^0-\bar{K}^0$ mixing are automatically satisfied once the constraints from kaon decays are satisfied.Comment: 18 pages, 7 figure

Phenomenology of the nMSSM from colliders to cosmology

Low energy supersymmetric models provide a solution to the hierarchy problem and also have the necessary ingredients to solve two of the most outstanding issues in cosmology: the origin of dark matter and baryonic matter. One of the most attractive features of this framework is that the relevant physical processes are related to interactions at the weak scale and therefore may be tested in collider experiments in the near future. This is true for the Minimal Supersymmetric Standard Model (MSSM) as well as for its extension with the addition of one singlet chiral superfield, the so-called nMSSM. It has been recently shown that within the nMSSM an elegant solution to both the problem of baryogenesis and dark matter may be found, that relies mostly on the mixing of the singlet sector with the Higgs sector of the theory. In this work we review the nMSSM model constraints from cosmology and present the associated collider phenomenology at the LHC and the ILC. We show that the ILC will efficiently probe the neutralino, chargino and Higgs sectors, allowing to confront cosmological observations with computations based on collider measurements. We also investigate the prospects for a direct detection of dark matter and the constraints imposed by the current bounds of the electron electric dipole moment in this model.Comment: 44 pp, 10 figures; Fig.9 replaced; discussion on CP violation extended and references added; few minor additions in text about details of the cut

Baikal-GVD

We present the status of the Gigaton Volume Detector in Lake Baikal (Baikal-GVD) designed for the detection of high energy neutrinos of astrophysical origin. The telescope consists of functionally independent clusters, sub-arrays of optical modules (OMs), which are connected to shore by individual electro-optical cables. During 2015 the GVD demonstration cluster, comprising 192 OMs, has been successfully operated in Lake Baikal. In 2016 this array was upgraded to baseline configuration of GVD cluster with 288 OMs arranged on eight vertical strings. Thus the instrumented water volume has been increased up to about 5.9 Mtons. The array was commissioned in early April 2016 and takes data since then. We describe the configuration and design of the 2016 array. Preliminary results obtained with data recorded in 2015 are also discussed

Missing energy signature for low scale supersymmetry breaking

If the supersymmetry is broken at a scale about several TeVs particles from the sector responsible for the supersymmetry breaking - goldstino and sgoldstino - can reveal themselves already at the LHC experiments. We discuss bounds on supersymmetry breaking scale from LHC searches for jet and missing energy signature

Missing energy signature for low scale supersymmetry breaking

If the supersymmetry is broken at a scale about several TeVs particles from the sector responsible for the supersymmetry breaking - goldstino and sgoldstino - can reveal themselves already at the LHC experiments. We discuss bounds on supersymmetry breaking scale from LHC searches for jet and missing energy signature

Constraints on multiparticle production in scalar field theory from classical simulations

We report numerical results on classical scattering of waves in a scalar field theory and discuss their connection to multiparticle production