Recent achievements of the ATLAS and CMS experiments at the Large Hadron Collider searching for a Higgs boson are summarized. A new particle with the mass of 125 GeV and properties expected for the ...Standard Model Higgs boson was discovered three years ago in these experiments in proton-proton collisions when analyzing part of the data taken at the centre-of-mass energies 7 TeV and 8 TeV in 2011 and 2012 year exposures. Today all the data are processed and fully analyzed. Experimental results of studies of individual Higgs boson decay channels as well as their combination to extract such properties as mass, signal strength, coupling constants, spin and parity are reviewed. All experimental results are found to be compatible with the Standard Model predictions.
The results of measurements of nonuniformities of the response of heterogeneous cellular electromagnetic calorimeter prototypes are presented. The features of technology solutions used in developing ...calorimetric modules under study are presented.
The results of an experiment devoted to searches for effects of rotation of fissioning nuclei in the angular distributions of prompt neutrons and gamma rays originating from the ...polarized-neutron-induced fission of sup.233U nuclei are presented. The effects discovered in these angular distributions are opposite in sign to their counterparts in the polarized-neutron-induced fission of sup.235U nuclei. This is at odds with data on the relative signs of respective effects in the angular distribution of alpha particles from the ternary fission of the same nuclei and may be indicative of problems in the model currently used to describe the effect in question. The report on which this article is based was presented at the seminar held at the Institute of Theoretical and Experimental Physics and dedicated to the 90th anniversary of the birth of Yu. G. Abov, corresponding member of Russian Academy of Sciences, Editor in Chief of the journal Physics of Atomic Nuclei. DOI: 10.1134/S1063778814050020
About 7% of all cancer deaths are caused by pancreatic cancer (PCa). PCa is known for its lowest survival rates among all oncological diseases and heterogenic molecular profile. Enormous amount of ...genetic changes, including somatic mutations, exceeds the limits of routine clinical genetic laboratory tests and further stagnates the development of personalized treatments. We aimed to build a mutational landscape of PCa in the Russian population based on full exome next-generation sequencing (NGS) of the limited group of patients. Applying a machine learning model on full exome individual data we received personalized recommendations for targeted treatment options for each clinical case and summarized them in the unique therapeutic landscape.
The paper presents experimental data on the emission of pure argon behind the front of a strong shock wave in a range of velocities of 4.5–7.8 km/s and the pressures ahead of the wave front of ... 0.25–5 Torr. Time integral sweeps of the radiation (panoramic spectra) as well as temporal dependences of the emission intensity of argon for wavelengths of 315, 420, 532.8, 696.5, and 738 nm in absolute units are given. Information is acquired on the delay time and rate of growth in the emission and its maximum intensity depending on the velocity of the shock wave. The above experimental data make it possible to construct more accurate kinetic models of nonequilibrium ionization and radiation processes behind the front of a shock wave.
The results of an experiment devoted to searches for effects of rotation of fissioning nuclei in the angular distributions of prompt neutrons and gamma rays originating from the ...polarized-neutron-induced fission of
233
U nuclei are presented. The effects discovered in these angular distributions are opposite in sign to their counterparts in the polarized-neutron-induced fission of
235
U nuclei. This is at odds with data on the relative signs of respective effects in the angular distribution of alpha particles from the ternary fission of the same nuclei and may be indicative of problems in the model currently used to describe the effect in question. The report on which this article is based was presented at the seminar held at the Institute of Theoretical and Experimental Physics and dedicated to the 90th anniversary of the birth of Yu.G. Abov, corresponding member of Russian Academy of Sciences, Editor in Chief of the journal
Physics of Atomic Nuclei
.
Study of the
T
-odd three-vector correlation in the emission of prompt neutrons from
235
U fission by polarized cold neutrons has been continued at the facility MEPHISTO of the FRM II reactor ...(Technical University of Munich). The sought correlation was not found within experimental error of 2.3 × 10
−5
. The upper limit for the asymmetry coefficient has been set to |
D
n
| < 6 × 10
−5
at 99% confidence level, whereas for ternary fission correlation coefficient
D
α
= (170±20) × 10
−5
. This limit casts doubt on a model that explains the three-vector correlation in ternary fission by the Coriolis mechanism. At the same time, five-vector correlation in the emission of prompt fission neutrons has been measured, which describes the rotation of the fissioning nucleus at the moment it breaks (ROT effect). At the angle 22.5° to the fission axis, the correlation coefficient was found to be (1.57 ± 0.20) × 10
−4
, while at the angle of 67.5° it is zero within the experimental uncertainty. The existence of ROT effect in the emission of prompt fission neutrons can be explained by the anisotropy of neutron emission in the rest frame of the fragment (fission fragments are aligned with respect to the axis of deformation of the fissioning nucleus), similar to the mechanism of ROT effect in the emission of prompt
γ
-rays.
A
bstract
Heavy Neutral Leptons (HNLs) are hypothetical particles predicted by many extensions of the Standard Model. These particles can, among other things, explain the origin of neutrino masses, ...generate the observed matter-antimatter asymmetry in the Universe and provide a dark matter candidate.
The SHiP experiment will be able to search for HNLs produced in decays of heavy mesons and travelling distances ranging between
O
(50 m) and tens of kilometers before decaying. We present the sensitivity of the SHiP experiment to a number of HNL’s benchmark models and provide a way to calculate the SHiP’s sensitivity to HNLs for arbitrary patterns of flavour mixings. The corresponding tools and data files are also made publicly available.
The results of an experiment aimed at searches for formally T-odd correlations in the angular distribution of prompt neutrons from the fission of sup.235U nuclei are presented. The experiment was ...performed in the MEPHISTO polarized cold-neutron beam from the Munich FRMII reactor. The correlation coefficient proved to be (-3.5 + or - 3.4) x 10~5 for a three-vector correlation (TRI effect) and (-5.0 + or - 3.4) x 10.sup.5 for a five-vector correlation (ROT effect). This means that no significant effects were discovered within the measurement errors. A comparison with the analogous effects in the ternary fission of sup.235U nuclei was performed. The values of the corresponding correlations in the angular distribution of prompt fission gamma rays were refined. DOI: 10.1134/S1063778810070045
Scission gamma rays Danilyan, G. V.; Klenke, J.; Krakhotin, V. A. ...
Physics of atomic nuclei,
11/2009, Letnik:
72, Številka:
11
Journal Article
Recenzirano
Gamma rays probably emitted by the fissioning nucleus
236
U* at the instant of the break of the neck or within the time of about 10
−21
s after or before this were discovered in the experiment ...devoted to searches for the effect of rotation of the fissioning nucleus in the process
235
U(
,
γf
) and performed in a polarized beam of cold neutrons from the MEPHISTO Guideline at the FRM II Munich reactor. Detailed investigations revealed that the angular distribution of these gamma rays is compatible with the assumption of the dipole character of the radiation and that their energy spectrum differs substantially from the spectrum of prompt fission gamma rays. In the measured interval 250–600 keV, this spectrum can be described by an exponential function at the exponent value of
α
= −5 × 10
−3
keV
−1
. The mechanism of radiation of such gamma rays is not known at the present time. Theoretical models based on the phenomenon of the electric giant dipole resonance in a strongly deformed fissioning nucleus or in a fission fragment predict harder radiation whose spectrum differs substantially from the spectrum measured in the present study.
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