Moscow Institute of Physics and Technology

About: Moscow Institute of Physics and Technology is a education organization based out in Dolgoprudnyy, Russia. It is known for research contribution in the topics: Laser & Plasma. The organization has 8594 authors who have published 16968 publications receiving 246551 citations. The organization is also known as: MIPT & Moscow Institute of Physics and Technology (State University).

The mass-hierarchy and CP-violation discovery reach of the LBNO long-baseline neutrino experiment

Abstract: The next generation neutrino observatory proposed by the LBNO collaboration will address fundamental questions in particle and astroparticle physics. The experiment consists of a far detector, in its first stage a 20 kt LAr double phase TPC and a magnetised iron calorimeter, situated at 2300 km from CERN and a near detector based on a high-pressure argon gas TPC. The long baseline provides a unique opportunity to study neutrino flavour oscillations over their 1st and 2nd oscillation maxima exploring the $L/E$ behaviour, and distinguishing effects arising from $\delta_{CP}$ and matter. In this paper we have reevaluated the physics potential of this setup for determining the mass hierarchy (MH) and discovering CP-violation (CPV), using a conventional neutrino beam from the CERN SPS with a power of 750 kW. We use conservative assumptions on the knowledge of oscillation parameter priors and systematic uncertainties. The impact of each systematic error and the precision of oscillation prior is shown. We demonstrate that the first stage of LBNO can determine unambiguously the MH to $>5\sigma$C.L. over the whole phase space. We show that the statistical treatment of the experiment is of very high importance, resulting in the conclusion that LBNO has 100% probability to determine the MH in at most 4-5 years of running. Since the knowledge of MH is indispensable to extract $\delta_{CP}$ from the data, the first LBNO phase can convincingly give evidence for CPV on the $3\sigma$C.L. using today's knowledge on oscillation parameters and realistic assumptions on the systematic uncertainties.

Results on \beta \beta decay with emission of two neutrinos or Majorons in ^{76}Ge from GERDA Phase I

Abstract: A search for neutrinoless $$\beta \beta $$ decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Processes with spectral indices $$n = 1, 2, 3, 7$$ were searched for. No signals were found and lower limits of the order of 10 $$^{23}$$ yr on their half-lives were derived, yielding substantially improved results compared to previous experiments with $$^{76}$$ Ge. A new result for the half-life of the neutrino-accompanied $$\beta \beta $$ decay of $$^{76}$$ Ge with significantly reduced uncertainties is also given, resulting in $$T^{2 u }_{1/2} = (1.926 \pm 0.094)\times 10^{21}$$ yr.

Thermodynamic properties of supercritical carbon dioxide: Widom and Frenkel lines.

Abstract: Supercritical fluids are widely used in a number of important technological applications, yet the theoretical progress in the field has been rather moderate Fairly recently, a new understanding of the liquidlike and gaslike properties of supercritical fluids has come to the fore, particularly with the advent of the Widom and Frenkel lines that aim to demarcate different physical properties on the phase diagram Here, we report the results of a computational study of supercritical carbon dioxide, one of the most important fluids in the chemical industry We study the response functions of ${\mathrm{CO}}_{2}$ in the supercritical state and calculate the locations of their maxima (Widom lines) We also report the preliminary calculations of the Frenkel line, the line of crossover of microscopic dynamics of particles Our insights are relevant to physical processes in the atmosphere of Venus and its evolution

Search for hadronic transition chi(cJ) -> eta(c)pi(+)pi(-) and observation of chi(cJ) -> K(K)over-bar pi pi pi

Abstract: Hadronic transitions of chi(cJ) -> eta(c)pi(+)pi(-) (J = 0, 1, 2) are searched for using a sample of 1.06 x 10(8) psi(3686) events collected with the BESIII detector at the BEPCII storage ring. The eta(c) is reconstructed with (KSK +/-)-K-0 pi(-/+) and K+K-pi(0) final states. No signals are observed in any of the three chi(cJ) states in either eta(c) decay mode. At the 90% confidence level, the upper limits are determined to be B(chi(c0) -> eta(c)pi(+)pi(-)) eta(c)pi(+)pi(-)) eta(c)pi(+)pi(-)) eta(c)pi(+)pi(-)) is lower than the existing theoretical prediction by almost an order of magnitude. The branching fractions of chi(cJ) -> (KSK +/-)-K-0 pi(-/+)pi(+)pi(-), K+K-pi(+)pi(-)pi(0), omega K+K-, and phi pi(+)pi(-)pi(0) (J = 0, 1, 2) are measured for the first time. DOI: 10.1103/PhysRevD.87.012002

Search for photonic signatures of gauge-mediated supersymmetry in 8 TeV pp collisions with the ATLAS detector

Abstract: A search is presented for photonic signatures motivated by generalized models of gauge-mediated supersymmetry breaking. This search makes use of 20.3 fb(-1) of proton-proton collision data at root s = 8 TeV recorded by the ATLAS detector at the LHC, and explores models dominated by both strong and electroweak production of supersymmetric partner states. Four experimental signatures incorporating an isolated photon and significant missing transverse momentum are explored. These signatures include events with an additional photon, lepton, b-quark jet, or jet activity not associated with any specific underlying quark flavor. No significant excess of events is observed above the Standard Model prediction and model-dependent 95% confidence-level exclusion limits are set.